Differentiation antigens residing on mammalian leukocytes. CD stands for cluster of differentiation, which refers to groups of monoclonal antibodies that show similar reactivity with certain subpopulations of antigens of a particular lineage or differentiation stage. The subpopulations of antigens are also known by the same CD designation.
Complex of at least five membrane-bound polypeptides in mature T-lymphocytes that are non-covalently associated with one another and with the T-cell receptor (RECEPTORS, ANTIGEN, T-CELL). The CD3 complex includes the gamma, delta, epsilon, zeta, and eta chains (subunits). When antigen binds to the T-cell receptor, the CD3 complex transduces the activating signals to the cytoplasm of the T-cell. The CD3 gamma and delta chains (subunits) are separate from and not related to the gamma/delta chains of the T-cell receptor (RECEPTORS, ANTIGEN, T-CELL, GAMMA-DELTA).
A member of the tumor necrosis factor receptor superfamily with specificity for CD40 LIGAND. It is found on mature B-LYMPHOCYTES and some EPITHELIAL CELLS, lymphoid DENDRITIC CELLS. Evidence suggests that CD40-dependent activation of B-cells is important for generation of memory B-cells within the germinal centers. Mutations of the gene for CD40 antigen result in HYPER-IGM IMMUNODEFICIENCY SYNDROME, TYPE 3. Signaling of the receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.
Acidic sulfated integral membrane glycoproteins expressed in several alternatively spliced and variable glycosylated forms on a wide variety of cell types including mature T-cells, B-cells, medullary thymocytes, granulocytes, macrophages, erythrocytes, and fibroblasts. CD44 antigens are the principle cell surface receptors for hyaluronate and this interaction mediates binding of lymphocytes to high endothelial venules. (From Abbas et al., Cellular and Molecular Immunology, 2d ed, p156)
Glycoproteins expressed on all mature T-cells, thymocytes, and a subset of mature B-cells. Antibodies specific for CD5 can enhance T-cell receptor-mediated T-cell activation. The B-cell-specific molecule CD72 is a natural ligand for CD5. (From Abbas et al., Cellular and Molecular Immunology, 2d ed, p156)
A critical subpopulation of T-lymphocytes involved in the induction of most immunological functions. The HIV virus has selective tropism for the T4 cell which expresses the CD4 phenotypic marker, a receptor for HIV. In fact, the key element in the profound immunosuppression seen in HIV infection is the depletion of this subset of T-lymphocytes.
Antigens, Differentiation, T-Lymphocyte
A membrane-bound or cytosolic enzyme that catalyzes the synthesis of CYCLIC ADP-RIBOSE (cADPR) from nicotinamide adenine dinucleotide (NAD). This enzyme generally catalyzes the hydrolysis of cADPR to ADP-RIBOSE, as well, and sometimes the synthesis of cyclic ADP-ribose 2' phosphate (2'-P-cADPR) from NADP.
Antigens, Differentiation, Myelomonocytic
A costimulatory ligand expressed by ANTIGEN-PRESENTING CELLS that binds to CTLA-4 ANTIGEN with high specificity and to CD28 ANTIGEN with low specificity. The interaction of CD80 with CD28 ANTIGEN provides a costimulatory signal to T-LYMPHOCYTES, while its interaction with CTLA-4 ANTIGEN may play a role in inducing PERIPHERAL TOLERANCE.
Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.
A costimulatory ligand expressed by ANTIGEN-PRESENTING CELLS that binds to CD28 ANTIGEN with high specificity and to CTLA-4 ANTIGEN with low specificity. The interaction of CD86 with CD28 ANTIGEN provides a stimulatory signal to T-LYMPHOCYTES, while its interaction with CTLA-4 ANTIGEN may play a role in inducing PERIPHERAL TOLERANCE.
Technique using an instrument system for making, processing, and displaying one or more measurements on individual cells obtained from a cell suspension. Cells are usually stained with one or more fluorescent dyes specific to cell components of interest, e.g., DNA, and fluorescence of each cell is measured as it rapidly transverses the excitation beam (laser or mercury arc lamp). Fluorescence provides a quantitative measure of various biochemical and biophysical properties of the cell, as well as a basis for cell sorting. Other measurable optical parameters include light absorption and light scattering, the latter being applicable to the measurement of cell size, shape, density, granularity, and stain uptake.
Antigens, Polyomavirus Transforming
Polyomavirus antigens which cause infection and cellular transformation. The large T antigen is necessary for the initiation of viral DNA synthesis, repression of transcription of the early region and is responsible in conjunction with the middle T antigen for the transformation of primary cells. Small T antigen is necessary for the completion of the productive infection cycle.
A tumor necrosis factor receptor subtype found in a variety of tissues and on activated LYMPHOCYTES. It has specificity for FAS LIGAND and plays a role in regulation of peripheral immune responses and APOPTOSIS. Multiple isoforms of the protein exist due to multiple ALTERNATIVE SPLICING. The activated receptor signals via a conserved death domain that associates with specific TNF RECEPTOR-ASSOCIATED FACTORS in the CYTOPLASM.
Antigens, Differentiation, B-Lymphocyte
High-molecular weight glycoproteins uniquely expressed on the surface of LEUKOCYTES and their hemopoietic progenitors. They contain a cytoplasmic protein tyrosine phosphatase activity which plays a role in intracellular signaling from the CELL SURFACE RECEPTORS. The CD45 antigens occur as multiple isoforms that result from alternative mRNA splicing and differential usage of three exons.
Molecular Sequence Data
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Sialic Acid Binding Ig-like Lectin 3
A 67-kDa sialic acid binding lectin that is specific for MYELOID CELLS and MONOCYTE-MACROPHAGE PRECURSOR CELLS. This protein is the smallest siglec subtype and contains a single immunoglobulin C2-set domain. It may play a role in intracellular signaling via its interaction with SHP-1 PROTEIN-TYROSINE PHOSPHATASE and SHP-2 PROTEIN-TYROSINE PHOSPHATASE.
Receptors, Antigen, T-Cell
Molecules on the surface of T-lymphocytes that recognize and combine with antigens. The receptors are non-covalently associated with a complex of several polypeptides collectively called CD3 antigens (ANTIGENS, CD3). Recognition of foreign antigen and the major histocompatibility complex is accomplished by a single heterodimeric antigen-receptor structure, composed of either alpha-beta (RECEPTORS, ANTIGEN, T-CELL, ALPHA-BETA) or gamma-delta (RECEPTORS, ANTIGEN, T-CELL, GAMMA-DELTA) chains.
Morphologic alteration of small B LYMPHOCYTES or T LYMPHOCYTES in culture into large blast-like cells able to synthesize DNA and RNA and to divide mitotically. It is induced by INTERLEUKINS; MITOGENS such as PHYTOHEMAGGLUTININS, and by specific ANTIGENS. It may also occur in vivo as in GRAFT REJECTION.
A member of the tumor necrosis factor receptor superfamily that may play a role in the regulation of NF-KAPPA B and APOPTOSIS. They are found on activated T-LYMPHOCYTES; B-LYMPHOCYTES; NEUTROPHILS; EOSINOPHILS; MAST CELLS and NK CELLS. Overexpression of CD30 antigen in hematopoietic malignancies make the antigen clinically useful as a biological tumor marker. Signaling of the receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.
Antigens, Viral, Tumor
Leukocyte differentiation antigens and major platelet membrane glycoproteins present on MONOCYTES; ENDOTHELIAL CELLS; PLATELETS; and mammary EPITHELIAL CELLS. They play major roles in CELL ADHESION; SIGNAL TRANSDUCTION; and regulation of angiogenesis. CD36 is a receptor for THROMBOSPONDINS and can act as a scavenger receptor that recognizes and transports oxidized LIPOPROTEINS and FATTY ACIDS.
Amino Acid Sequence
A group of three different alpha chains (CD11a, CD11b, CD11c) that are associated with an invariant CD18 beta chain (ANTIGENS, CD18). The three resulting leukocyte-adhesion molecules (RECEPTORS, LEUKOCYTE ADHESION) are LYMPHOCYTE FUNCTION-ASSOCIATED ANTIGEN-1; MACROPHAGE-1 ANTIGEN; and ANTIGEN, P150,95.
Histocompatibility Antigens Class II
Large, transmembrane, non-covalently linked glycoproteins (alpha and beta). Both chains can be polymorphic although there is more structural variation in the beta chains. The class II antigens in humans are called HLA-D ANTIGENS and are coded by a gene on chromosome 6. In mice, two genes named IA and IE on chromosome 17 code for the H-2 antigens. The antigens are found on B-lymphocytes, macrophages, epidermal cells, and sperm and are thought to mediate the competence of and cellular cooperation in the immune response. The term IA antigens used to refer only to the proteins encoded by the IA genes in the mouse, but is now used as a generic term for any class II histocompatibility antigen.
A group of antigens that includes both the major and minor histocompatibility antigens. The former are genetically determined by the major histocompatibility complex. They determine tissue type for transplantation and cause allograft rejections. The latter are systems of allelic alloantigens that can cause weak transplant rejection.
Receptors, Antigen, B-Cell
Proliferating Cell Nuclear Antigen
Nuclear antigen with a role in DNA synthesis, DNA repair, and cell cycle progression. PCNA is required for the coordinated synthesis of both leading and lagging strands at the replication fork during DNA replication. PCNA expression correlates with the proliferation activity of several malignant and non-malignant cell types.
A transmembrane protein belonging to the tumor necrosis factor superfamily that specifically binds to CD27 ANTIGEN. It is found on activated T-LYMPHOCYTES; B-LYMPHOCYTES; and DENDRITIC CELLS where it plays a role in stimulating the proliferation of CD4-POSITIVE T-LYMPHOCYTES and CD8-POSITIVE T-LYMPHOCYTES.
55-kDa antigens found on HELPER-INDUCER T-LYMPHOCYTES and on a variety of other immune cell types. CD4 antigens are members of the immunoglobulin supergene family and are implicated as associative recognition elements in MAJOR HISTOCOMPATIBILITY COMPLEX class II-restricted immune responses. On T-lymphocytes they define the helper/inducer subset. CD4 antigens also serve as INTERLEUKIN-15 receptors and bind to the HIV receptors, binding directly to the HIV ENVELOPE PROTEIN GP120.
The lipopolysaccharide-protein somatic antigens, usually from gram-negative bacteria, important in the serological classification of enteric bacilli. The O-specific chains determine the specificity of the O antigens of a given serotype. O antigens are the immunodominant part of the lipopolysaccharide molecule in the intact bacterial cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
Enzyme-Linked Immunosorbent Assay
An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed.
CD4 Lymphocyte Count
Antigens, Tumor-Associated, Carbohydrate
Tumor Cells, Cultured
Histocompatibility Antigens Class I
Membrane glycoproteins consisting of an alpha subunit and a BETA 2-MICROGLOBULIN beta subunit. In humans, highly polymorphic genes on CHROMOSOME 6 encode the alpha subunits of class I antigens and play an important role in determining the serological specificity of the surface antigen. Class I antigens are found on most nucleated cells and are generally detected by their reactivity with alloantisera. These antigens are recognized during GRAFT REJECTION and restrict cell-mediated lysis of virus-infected cells.
A member of the tumor necrosis factor receptor superfamily that is specific for 4-1BB LIGAND. It is found in a variety of immune cell types including activated T-LYMPHOCYTES; NATURAL KILLER CELLS; and DENDRITIC CELLS. Activation of the receptor on T-LYMPHOCYTES plays a role in their expansion, production of cytokines and survival. Signaling by the activated receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.
White blood cells formed in the body's lymphoid tissue. The nucleus is round or ovoid with coarse, irregularly clumped chromatin while the cytoplasm is typically pale blue with azurophilic (if any) granules. Most lymphocytes can be classified as either T or B (with subpopulations of each), or NATURAL KILLER CELLS.
Polymorphic class I human histocompatibility (HLA) surface antigens present on almost all nucleated cells. At least 20 antigens have been identified which are encoded by the A locus of multiple alleles on chromosome 6. They serve as targets for T-cell cytolytic responses and are involved with acceptance or rejection of tissue/organ grafts.
Specialized cells of the hematopoietic system that have branch-like extensions. They are found throughout the lymphatic system, and in non-lymphoid tissues such as SKIN and the epithelia of the intestinal, respiratory, and reproductive tracts. They trap and process ANTIGENS, and present them to T-CELLS, thereby stimulating CELL-MEDIATED IMMUNITY. They are different from the non-hematopoietic FOLLICULAR DENDRITIC CELLS, which have a similar morphology and immune system function, but with respect to humoral immunity (ANTIBODY PRODUCTION).
Receptors present on activated T-LYMPHOCYTES and B-LYMPHOCYTES that are specific for INTERLEUKIN-2 and play an important role in LYMPHOCYTE ACTIVATION. They are heterotrimeric proteins consisting of the INTERLEUKIN-2 RECEPTOR ALPHA SUBUNIT, the INTERLEUKIN-2 RECEPTOR BETA SUBUNIT, and the INTERLEUKIN RECEPTOR COMMON GAMMA-CHAIN.
Blood Group Antigens
Hepatitis B Surface Antigens
Fluorescent Antibody Technique
Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.
Human immune-response or Class II antigens found mainly, but not exclusively, on B-lymphocytes and produced from genes of the HLA-D locus. They are extremely polymorphic families of glycopeptides, each consisting of two chains, alpha and beta. This group of antigens includes the -DR, -DQ and -DP designations, of which HLA-DR is most studied; some of these glycoproteins are associated with certain diseases, possibly of immune etiology.
A form of undifferentiated malignant LYMPHOMA usually found in central Africa, but also reported in other parts of the world. It is commonly manifested as a large osteolytic lesion in the jaw or as an abdominal mass. B-cell antigens are expressed on the immature cells that make up the tumor in virtually all cases of Burkitt lymphoma. The Epstein-Barr virus (HERPESVIRUS 4, HUMAN) has been isolated from Burkitt lymphoma cases in Africa and it is implicated as the causative agent in these cases; however, most non-African cases are EBV-negative.
Deliberate stimulation of the host's immune response. ACTIVE IMMUNIZATION involves administration of ANTIGENS or IMMUNOLOGIC ADJUVANTS. PASSIVE IMMUNIZATION involves administration of IMMUNE SERA or LYMPHOCYTES or their extracts (e.g., transfer factor, immune RNA) or transplantation of immunocompetent cell producing tissue (thymus or bone marrow).
RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.
Hepatitis B Antigens
The soft tissue filling the cavities of bones. Bone marrow exists in two types, yellow and red. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells.
The relatively long-lived phagocytic cell of mammalian tissues that are derived from blood MONOCYTES. Main types are PERITONEAL MACROPHAGES; ALVEOLAR MACROPHAGES; HISTIOCYTES; KUPFFER CELLS of the liver; and OSTEOCLASTS. They may further differentiate within chronic inflammatory lesions to EPITHELIOID CELLS or may fuse to form FOREIGN BODY GIANT CELLS or LANGHANS GIANT CELLS. (from The Dictionary of Cell Biology, Lackie and Dow, 3rd ed.)
Mice homozygous for the mutant autosomal recessive gene "scid" which is located on the centromeric end of chromosome 16. These mice lack mature, functional lymphocytes and are thus highly susceptible to lethal opportunistic infections if not chronically treated with antibiotics. The lack of B- and T-cell immunity resembles severe combined immunodeficiency (SCID) syndrome in human infants. SCID mice are useful as animal models since they are receptive to implantation of a human immune system producing SCID-human (SCID-hu) hematochimeric mice.
Immunized T-lymphocytes which can directly destroy appropriate target cells. These cytotoxic lymphocytes may be generated in vitro in mixed lymphocyte cultures (MLC), in vivo during a graft-versus-host (GVH) reaction, or after immunization with an allograft, tumor cell or virally transformed or chemically modified target cell. The lytic phenomenon is sometimes referred to as cell-mediated lympholysis (CML). These CD8-positive cells are distinct from NATURAL KILLER CELLS and NATURAL KILLER T-CELLS. There are two effector phenotypes: TC1 and TC2.
Recombinant Fusion Proteins
A heterogeneous group of immunocompetent cells that mediate the cellular immune response by processing and presenting antigens to the T-cells. Traditional antigen-presenting cells include MACROPHAGES; DENDRITIC CELLS; LANGERHANS CELLS; and B-LYMPHOCYTES. FOLLICULAR DENDRITIC CELLS are not traditional antigen-presenting cells, but because they hold antigen on their cell surface in the form of IMMUNE COMPLEXES for B-cell recognition they are considered so by some authors.
Herpesvirus 4, Human
Receptors, Antigen, T-Cell, alpha-beta
Class I human histocompatibility (HLA) surface antigens encoded by more than 30 detectable alleles on locus B of the HLA complex, the most polymorphic of all the HLA specificities. Several of these antigens (e.g., HLA-B27, -B7, -B8) are strongly associated with predisposition to rheumatoid and other autoimmune disorders. Like other class I HLA determinants, they are involved in the cellular immune reactivity of cytolytic T lymphocytes.
Bone Marrow Cells
A promyelocytic cell line derived from a patient with ACUTE PROMYELOCYTIC LEUKEMIA. HL-60 cells lack specific markers for LYMPHOID CELLS but express surface receptors for FC FRAGMENTS and COMPLEMENT SYSTEM PROTEINS. They also exhibit phagocytic activity and responsiveness to chemotactic stimuli. (From Hay et al., American Type Culture Collection, 7th ed, pp127-8)
Non-antibody proteins secreted by inflammatory leukocytes and some non-leukocytic cells, that act as intercellular mediators. They differ from classical hormones in that they are produced by a number of tissue or cell types rather than by specialized glands. They generally act locally in a paracrine or autocrine rather than endocrine manner.
The specific failure of a normally responsive individual to make an immune response to a known antigen. It results from previous contact with the antigen by an immunologically immature individual (fetus or neonate) or by an adult exposed to extreme high-dose or low-dose antigen, or by exposure to radiation, antimetabolites, antilymphocytic serum, etc.
A single, unpaired primary lymphoid organ situated in the MEDIASTINUM, extending superiorly into the neck to the lower edge of the THYROID GLAND and inferiorly to the fourth costal cartilage. It is necessary for normal development of immunologic function early in life. By puberty, it begins to involute and much of the tissue is replaced by fat.
A group of genetically identical cells all descended from a single common ancestral cell by mitosis in eukaryotes or by binary fission in prokaryotes. Clone cells also include populations of recombinant DNA molecules all carrying the same inserted sequence. (From King & Stansfield, Dictionary of Genetics, 4th ed)
Epstein-Barr Virus Nuclear Antigens
Measurable and quantifiable biological parameters (e.g., specific enzyme concentration, specific hormone concentration, specific gene phenotype distribution in a population, presence of biological substances) which serve as indices for health- and physiology-related assessments, such as disease risk, psychiatric disorders, environmental exposure and its effects, disease diagnosis, metabolic processes, substance abuse, pregnancy, cell line development, epidemiologic studies, etc.
Antibodies, Monoclonal, Murine-Derived
The major interferon produced by mitogenically or antigenically stimulated LYMPHOCYTES. It is structurally different from TYPE I INTERFERON and its major activity is immunoregulation. It has been implicated in the expression of CLASS II HISTOCOMPATIBILITY ANTIGENS in cells that do not normally produce them, leading to AUTOIMMUNE DISEASES.
A heterodimeric protein that is a cell surface antigen associated with lymphocyte activation. The initial characterization of this protein revealed one identifiable heavy chain (ANTIGENS, CD98 HEAVY CHAIN) and an indeterminate smaller light chain. It is now known that a variety of light chain subunits (ANTIGENS, CD98 LIGHT CHAINS) can dimerize with the heavy chain. Depending upon its light chain composition a diverse array of functions can be found for this protein. Functions include: type L amino acid transport, type y+L amino acid transport and regulation of cellular fusion.
Hepatitis B Core Antigens
Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are linear polypeptides that are normally synthesized on RIBOSOMES.
The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway.
Mice, Inbred Strains
Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation.
Complement Fixation Tests
Serologic tests based on inactivation of complement by the antigen-antibody complex (stage 1). Binding of free complement can be visualized by addition of a second antigen-antibody system such as red cells and appropriate red cell antibody (hemolysin) requiring complement for its completion (stage 2). Failure of the red cells to lyse indicates that a specific antigen-antibody reaction has taken place in stage 1. If red cells lyse, free complement is present indicating no antigen-antibody reaction occurred in stage 1.
Simian virus 40
Substances that augment, stimulate, activate, potentiate, or modulate the immune response at either the cellular or humoral level. The classical agents (Freund's adjuvant, BCG, Corynebacterium parvum, et al.) contain bacterial antigens. Some are endogenous (e.g., histamine, interferon, transfer factor, tuftsin, interleukin-1). Their mode of action is either non-specific, resulting in increased immune responsiveness to a wide variety of antigens, or antigen-specific, i.e., affecting a restricted type of immune response to a narrow group of antigens. The therapeutic efficacy of many biological response modifiers is related to their antigen-specific immunoadjuvanticity.
gp100 Melanoma Antigen
Major Histocompatibility Complex
The genetic region which contains the loci of genes which determine the structure of the serologically defined (SD) and lymphocyte-defined (LD) TRANSPLANTATION ANTIGENS, genes which control the structure of the IMMUNE RESPONSE-ASSOCIATED ANTIGENS, HUMAN; the IMMUNE RESPONSE GENES which control the ability of an animal to respond immunologically to antigenic stimuli, and genes which determine the structure and/or level of the first four components of complement.
Killer Cells, Natural
Bone marrow-derived lymphocytes that possess cytotoxic properties, classically directed against transformed and virus-infected cells. Unlike T CELLS; and B CELLS; NK CELLS are not antigen specific. The cytotoxicity of natural killer cells is determined by the collective signaling of an array of inhibitory and stimulatory CELL SURFACE RECEPTORS. A subset of T-LYMPHOCYTES referred to as NATURAL KILLER T CELLS shares some of the properties of this cell type.
A technique that combines protein electrophoresis and double immunodiffusion. In this procedure proteins are first separated by gel electrophoresis (usually agarose), then made visible by immunodiffusion of specific antibodies. A distinct elliptical precipitin arc results for each protein detectable by the antisera.
Selective tetraspan-integrin complexes (CD81/alpha4beta1, CD151/alpha3beta1, CD151/alpha6beta1) under conditions disrupting tetraspan interactions. (1/333)The tetraspans are molecules with four transmembrane domains which are engaged in multimolecular complexes (the tetraspan web) containing a subset of beta1 integrins (in particular alpha3beta1, alpha4beta1 and alpha6beta1), MHC antigens and several unidentified molecules. The molecules associated with tetraspans are readily detected after immunoprecipitation performed in mild detergents such as Brij 97 or CHAPS. In this study we show that another classical mild detergent, digitonin, dissociated most of these associated molecules, including integrins, from the tetraspans CD9, CD37, CD53, CD63, CD82, Co-029, Talla-1 and NAG-2. In contrast, reciprocal immunoprecipitations from various cell lines demonstrated that two other tetraspans, CD81 and CD151, formed complexes with integrins not disrupted by digitonin. These complexes were CD81/alpha4beta1, CD151/alpha3beta1 and CD151/alpha6beta1. Furthermore, a new anti-CD151 monoclonal antibody (mAb), TS151r, was shown to have a restricted pattern of expression, inversely related to the sum of the levels of expression of alpha6beta1 and alpha3beta1. This mAb was unable to co-precipitate integrins in digitonin, suggesting that its epitope is blocked by the association with integrins. Indeed, the binding of TS151r to the cell surface was quantitatively diminished following alpha3beta1 overexpression. Altogether, these data suggest that, among tetraspans, CD81 interacts directly with the integrin alpha4beta1, and CD151 interacts directly with integrins alpha3beta1 and alpha6beta1. Because all tetraspan-tetraspan associations are disrupted by digitonin, it is likely that the other tetraspans interact indirectly with integrins, through interactions with CD81 or CD151. (+info)
Characterization of hepatitis C virus E2 glycoprotein interaction with a putative cellular receptor, CD81. (2/333)A truncated soluble form of the hepatitis C virus E2 glycoprotein, E2661, binds specifically to the surface of cells expressing human CD81 (hCD81) but not other members of the tetraspanin family (CD9, CD63, and CD151). No differences were noted between the level of E2661 binding to hCD81 expressed on the surface of rat RBL or KM3 cells compared to Daudi and Molt-4 cells, suggesting that additional human-cell-specific factors are not required for the primary interaction of E2 with the cell surface. E2 did not interact with African green monkey (AGM) CD81 on the surface of COS cells, which differs from the hCD81 sequence at four residues within the second extracellular region (EC2) (amino acids [aa] 163, 186, 188, and 196), suggesting that one or more of these residues defines the site of interaction with E2. Various recombinant forms of CD81 EC2 show differences in the ability to bind E2, suggesting that CD81 conformation is important for E2 recognition. Regions of E2 involved in the CD81 interaction were analyzed, and our data suggest that the binding site is of a conformational nature involving aa 480 to 493 and 544 to 551 within the E2 glycoprotein. Finally, we demonstrate that ligation of CD81 by E2661 induced aggregation of lymphoid cells and inhibited B-cell proliferation, demonstrating that E2 interaction with CD81 can modulate cell function. (+info)
Functional analysis of cell surface-expressed hepatitis C virus E2 glycoprotein. (3/333)Hepatitis C virus (HCV) glycoproteins E1 and E2, when expressed in eukaryotic cells, are retained in the endoplasmic reticulum (ER). C-terminal truncation of E2 at residue 661 or 715 (position on the polyprotein) leads to secretion, consistent with deletion of a proposed hydrophobic transmembrane anchor sequence. We demonstrate cell surface expression of a chimeric glycoprotein consisting of E2 residues 384 to 661 fused to the transmembrane and cytoplasmic domains of influenza A virus hemagglutinin (HA), termed E2661-HATMCT. The E2661-HATMCT chimeric glycoprotein was able to bind a number of conformation-dependent monoclonal antibodies and a recombinant soluble form of CD81, suggesting that it was folded in a manner comparable to "native" E2. Furthermore, cell surface-expressed E2661-HATMCT demonstrated pH-dependent changes in antigen conformation, consistent with an acid-mediated fusion mechanism. However, E2661-HATMCT was unable to induce cell fusion of CD81-positive HEK cells after neutral- or low-pH treatment. We propose that a stretch of conserved, hydrophobic amino acids within the E1 glycoprotein, displaying similarities to flavivirus and paramyxovirus fusion peptides, may constitute the HCV fusion peptide. We demonstrate that influenza virus can incorporate E2661-HATMCT into particles and discuss experiments to address the relevance of the E2-CD81 interaction for HCV attachment and entry. (+info)
Finding the right RNA: identification of cellular mRNA substrates for RNA-binding proteins. (4/333)Defects in RNA-binding proteins have been implicated in human genetic disorders. However, efforts in understanding the functions of these proteins have been hampered by the inability to obtain their mRNA substrates. To identify cognate cellular mRNAs associated with an RNA-binding protein, we devised a strategy termed isolation of specific nucleic acids associated with proteins (SNAAP). The SNAAP technique allows isolation and subsequent identification of these mRNAs. To assess the validity of this approach, we utilized cellular mRNA and protein from K562 cells and alphaCP1, a protein implicated in a-globin mRNA stability, as a model system. Immobilization of an RNA-binding protein with the glutathione-S-transferase (GST) domain enables isolation of mRNA within an mRNP context and the identity of the bound mRNAs is determined by the differential display assay. The specificity of protein-RNA interactions was considerably enhanced when the interactions were carried out in the presence of cellular extract rather than purified components. Two of the mRNAs specifically bound by alphaCP1 were mRNAs encoding the transmembrane receptor protein, TAPA-1, and the mitochondrial cytochrome c oxidase subunit II enzyme, coxII. A specific poly(C)-sensitive complex formed on the TAPA-1 and coxII 3' UTRs consistent with the binding of aCP1. Furthermore, direct binding of purified alphaCP proteins to these 3' UTRs was demonstrated and the binding sites determined. These results support the feasibility of the SNAAP technique and suggest a broad applicability for the approach in identifying mRNA targets for clinically relevant RNA-binding proteins that will provide insights into their possible functions. (+info)
Role of transmembrane 4 superfamily (TM4SF) proteins CD9 and CD81 in muscle cell fusion and myotube maintenance. (5/333)The role of transmembrane 4 superfamily (TM4SF) proteins during muscle cell fusion has not been investigated previously. Here we show that the appearance of TM4SF protein, CD9, and the formation of CD9-beta1 integrin complexes were both regulated in coordination with murine C2C12 myoblast cell differentiation. Also, anti-CD9 and anti-CD81 monoclonal antibodies substantially inhibited and delayed conversion of C2C12 cells to elongated myotubes, without affecting muscle-specific protein expression. Studies of the human myoblast-derived RD sarcoma cell line further demonstrated that TM4SF proteins have a role during muscle cell fusion. Ectopic expression of CD9 caused a four- to eightfold increase in RD cell syncytia formation, whereas anti-CD9 and anti-CD81 antibodies markedly delayed RD syncytia formation. Finally, anti-CD9 and anti-CD81 monoclonal antibodies triggered apoptotic degeneration of C2C12 cell myotubes after they were formed. In summary, TM4SF proteins such as CD9 and CD81 appear to promote muscle cell fusion and support myotube maintenance. (+info)
Rapid and systemic accumulation of chloroplast mRNA-binding protein transcripts after flame stimulus in tomato. (6/333)It has been shown that tomato (Lycopersicon esculentum) plants respond to flame wounding and electrical stimulation by a rapid (15 min) and systemic up-regulation of proteinase inhibitor (pin) genes. To find other genes having a similar expression pattern, we used subtractive cDNA screening between flamed and control plants to select clones up-regulated by flame wounding. We report the characterization of one of them, a chloroplast mRNA-binding protein encoded by a single gene and expressed preferentially in the leaves. Systemic gene expression in response to flaming in the youngest terminal leaf exhibited three distinct phases: a rapid and transient increase (5-15 min) in transcript accumulation, a decline to basal levels (15-45 min), and then a second, more prolonged increase (60-90 min). In contrast, after a mechanical wound the rapid, transient increase (5 min) was followed by a rapid decline to basal levels but no later, prolonged accumulation. In the petiole, the initial flame-wound-evoked transient increase (15 min) was followed by a continuous decline for 3 h. The nature of the wound signal(s) causing such rapid changes in transcript abundance is discussed in relation to electrical signaling, which has recently been implicated in plant responses to wounding. (+info)
Association of a tetraspanin CD9 with CD5 on the T cell surface: role of particular transmembrane domains in the association. (7/333)CD9 is a member of the tetraspanin superfamily which is characterized by four transmembrane (TM) domains and associates with other surface molecules. This tetraspanin was recently found to be expressed on mature T cells. Here, we investigated which molecules associate with CD9 on T cells and which CD9 domains are required for the association. Immunoprecipitation of T cell lysates with anti-CD9 mAb followed by immunoblotting with mAb against various T cell molecules showed the association of CD9 with CD3, CD4, CD5, CD2, CD29 and CD44. Because association with CD5 was most prominent, we determined the role of CD9 TM or extracellular (EC) domains in the association with CD5. CD9 mutant genes lacking each domain were constructed and introduced into EL4 thymoma cells deficient in CD9 but expressing CD5. Among various types of stable EL4 transfectants, EL4 transfected with the mutant gene lacking TM domains (TM2/TM3) between two EC domains expressed a small amount of the relevant protein without showing association with CD5. CD9(-)CD5(-) monkey COS-7 cells transfected with this mutant gene and the CD5 gene expressed both transfected gene products, but the association of these was not detected. EL4 cells transfected with a CD9/CD81 chimera gene (the CD9 gene containing TM2/TM3 of CD81) expressed the chimeric protein on the cell surface and showed association with CD5. These results suggest an essential role of particular CD9 TM domains in the surface expression of the CD9 molecule as well as the association with CD5. (+info)
Functional characterization of intracellular and secreted forms of a truncated hepatitis C virus E2 glycoprotein. (8/333)The E2 protein of hepatitis C virus (HCV) is believed to be a virion surface glycoprotein that is a candidate for inclusion in an antiviral vaccine. A truncated soluble version of E2 has recently been shown to interact with CD81, suggesting that this protein may be a component of the receptor for HCV. When expressed in eukaryotic cells, a significant proportion of E2 forms misfolded aggregates. To analyze the specificity of interaction between E2 and CD81, the aggregated and monomeric forms of a truncated E2 glycoprotein (E2(661)) were separated by high-pressure liquid chromatography and analyzed for CD81 binding. Nonaggregated forms of E2 preferentially bound CD81 and a number of conformation-dependent monoclonal antibodies (MAbs). Furthermore, intracellular forms of E2(661) were found to bind CD81 with greater affinity than the extracellular forms. Intracellular and secreted forms of E2(661) were also found to differ in reactivity with MAbs and human sera, consistent with differences in antigenicity. Together, these data indicate that proper folding of E2 is important for its interaction with CD81 and that modifications of glycans can modulate this interaction. Identification of the biologically active forms of E2 will assist in the future design of vaccines to protect against HCV infection. (+info)
Hepatitis C virus glycoprotein E2 binding to CD81: the role of E1E2 cleavage and protein glycosylation in bioactivity. - Oxford...
The hepatitis C virus glycoproteins E1 and 2 have been expressed using recombinant baculoviruses following fusion to the carrier protein glutathione S-transferase (GST). Proteins were expressed singly and as an E1E2 polyprotein with and without an N-terminal affinity tag. Expression of the E1E2 polyprotein, even when preceded by GST, led to processing in insect cells and detection of an E1E2 complex that could be specifically purified by glutathione affinity chromatography. Baculovirus expressed E2 and a purified GST-E1E2 protein bound to the second extracellular loop of CD81 (EC2), a reported ligand for the molecule, but not to a truncated derivative of CD81 consisting of only the central domain of the loop. Purified GST-E2, however, failed to bind to CD81 suggesting a requirement for a free E2 amino terminus for biological activity. The binding to CD81 by baculovirus expressed E2 protein was comparable to that observed for E2 derived from mammalian cells when detected by a monoclonal antibody
Prof. Dr. Thomas Krey - RESIST
Fedry J, Forcina J, Legrand P, Pehau-Arnaudet G, Haouz A, Johnson M*, Rey FA*, Krey T*. 2018. Evolutionary diversification of the HAP2 membrane insertion motifs to drive gamete fusion across eukaryotes. PLoS biology 16:e2006357. (M.J., F.A.R. and T.K. contributed equally to this work) Ströh LJ, Nagarathinam K, Krey T. 2018. Conformational Flexibility in the CD81-Binding Site of the Hepatitis C Virus Glycoprotein E2. Frontiers in immunology 9:1396. Vasiliauskaite I, Owsianka AM, England P, Khan AG, Cole S, Bankwitz D, Foung SKH, Pietschmann T, Marcotrigiano J, Rey FA, Patel AH*, Krey T*. 2017. Conformational Flexibility in the Immunoglobulin-Like Domain of the Hepatitis C Virus Glycoprotein E2. mBio 8:e00382-00317. (A.H.P. and T.K. contributed equally to this work) Fedry J, Liu Y, Pehau-Arnaudet G, Pei J, Li W, Tortorici MA, Traincard F, Meola A, Bricogne G, Grishin NV, Snell WJ*, Rey FA*, Krey T*. 2017. The Ancient Gamete Fusogen HAP2 Is a Eukaryotic Class II Fusion Protein. Cell ...
Polarization restricts hepatitis C virus entry into HepG2 hepatoma cells - ePrints Repository
The primary reservoir for hepatitis C virus (HCV) replication is believed to be hepatocytes, which are highly polarized with tight junctions (TJ) separating their basolateral and apical domains. HepG2 cells develop polarity over time, resulting in the formation and remodeling of bile canalicular (BC) structures. HepG2 cells expressing CD81 provide a model system to study the effects of hepatic polarity on HCV infection. We found an inverse association between HepG2-CD81 polarization and HCV pseudoparticle entry. As HepG2 cells polarize, discrete pools of claudin-1 (CLDN1) at the TJ and basal/lateral membranes develop, consistent with the pattern of receptor staining observed in liver tissue. The TJ and nonjunctional pools of CLDN1 show an altered association with CD81 and localization in response to the PKA antagonist Rp-8-Br-cyclic AMPs (cAMPs). Rp-8-Br-cAMPs reduced CLDN1 expression at the basal membrane and inhibited HCV infection, supporting a model where the nonjunctional pools of CLDN1 ...
Mutagenetix > Incidental...
FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] The protein encoded by this gene is a plasma membrane receptor for high density lipoprotein cholesterol (HDL). The encoded protein mediates cholesterol transfer to and from HDL. In addition, this protein is a receptor for hepatitis C virus glycoprotein E2. Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Mar 2011 ...
Citation tools | Journal of Virology
Meola, Annalisa et al Structural Flexibility of a Conserved Antigenic Region in Hepatitis C Virus Glycoprotein E2 Recognized by Broadly Neutralizing Antibodies. Journal of Virology 89.4 (2015): 2170-2181. Web. 08 Dec. 2019. ...
Pacific Blue anti-human CD81 TAPA-1 Antibody anti-CD81 - 5A6
|p|CD81 is a 26 kD non-glycosylated member of the tetraspanin superfamily (TM4SF), also known as TAPA-1 (target of an antiproliferative antibody). CD81 is expressed on T and B cells, NK cells, monocytes, dendritic cells, thymocytes, endothelial cells, and fibroblasts. It also has low levels of expre
GasAlertMax XT II Four Gas Detector O2 CO H2S LEL from Davis Instruments
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v dsk policie zabavila kutilovi bramborov d lo - iDNES.cz
v dsk policie zabavila p tadvacetilet mu mu i z m sta Bojsenburg bramborov d lo, kter postavil spolu s kamar dy. Z okna sv ho bytu j m st lel brambory do okol . D lo si vyrobil podle televizn ho po adu, kter ho inspiroval.
Antigenicity of hepatitis C virus envelope proteins expressed in Chinese hamster ovary cells<...
TY - JOUR. T1 - Antigenicity of hepatitis C virus envelope proteins expressed in Chinese hamster ovary cells. AU - Inudoh, M.. AU - Nyunoya, H.. AU - Tanaka, T.. AU - Hijikata, M.. AU - Kato, N.. AU - Shimotohno, K.. PY - 1996/12/1. Y1 - 1996/12/1. N2 - A putative second envelope glycoprotein (E2) of hepatitis C virus (HCV) was constitutively produced in a Chinese hamster ovary cell line stably transformed with a plasmid expressing E2 protein under the control of an exogenous promoter and a signal sequence. E2 protein that lacked part of the C-terminal hydrophobic region was glycosylated with high-mannose type oligosaccharides and retained in the cells. On the other hand, E2 protein lacking the entire C-terminal hydrophobic region was glycosylated with complex type oligosaccharides (complex form) and excreted into the culture medium. Immunoreactivity of the high-mannose and complex forms of E2 proteins against sera from HCV infected patients were analyzed. We found that the antigenicity of the ...
Binding of the Hepatitis C Virus Envelope Protein E2 to CD81 Inhibits Natural Killer Cell Functions
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
Private Dining - Tapas Valencia
Was looking for a Tapas place over Valentines Day. We found Tapas Valencia via an internet search. We were intrigued by the menu selection, along with the on line reviews. We liked the fact that we were able to make a reservation and when we arrived we were seated right away. Our server was very knowledgeable and gave us excellent suggestions on food, wine and beer. The added treat was the Flamenco guitar players and dancer. Truly added a lot to the experience. All the food was very delicious and a good size helping for 4 to try each Tapas ...
Top 10 Yumbox TAPAS Tray - Oil Dispensing Bottles - RoiCox
Insulated: we use high density epe foam to keep your Yumbox lunch bag well insulated. It stores flat. . This means that your meals stay cooler or hotter longer than with non-insulated bags. . Yes it also fits Yumbox Tapas and a drink bottle. It is easy to clean with a wet cloth. It fits lots of stuff: bags exterior dimensions are 1025 l x 8 w x 4 h inches. Interior dimensions are 10 l x 7. 75 w x 3. 75 h ...
Tapas Hazra, PhD - Fingerprint - UTMB Health Research Expert Profiles
Fingerprint Dive into the research topics where Tapas Hazra is active. These topic labels come from the works of this person. Together they form a unique fingerprint. ...
AutoRAE 2 Calibration Kit for QRAE 3 O2/LEL/CO/H2S Gas
AutoRAE 2 Kit with inCase Calibration configured for AutoRAE 2 controller and 3 QRAE 3 cradles. Kit includes 3 QRAE3s (O2/LEL/CO+H2S/PID), 3 gas meters, 1 cylinder of calibration gas, 1 regulators, and supporting accessories.
Patent US7084425 - Organic electroluminescent devices - Google Patents
Disclosed is an electroluminescent device comprising a cathode and an anode; and, located therebetween, a light-emitting layer (LEL) comprising a phosphorescent green-light-emitting material and a host material for the light-emitting material, and in a layer adjacent to the LEL on the anode side, an exciton-blocking layer containing a compound having a hole mobility of at least 1 10−3 cm2V−1s−1 and a triplet energy exceeding that of the green-light-emitting material of the LEL. Such a device provides useful light emission.
9781782210207: The Overlocker Technique Manual: The Complete Guide to Serging and Decorative Stitching - IberLibro - Julia...
The Overlocker Technique Manual: The Complete Guide to Serging and Decorative Stitching de Julia Hincks en Iberlibro.com - ISBN 10: 1782210202 - ISBN 13: 9781782210207 - Search Press Ltd - 2014 - Tapa blanda
Carta & cócteles - Terraza de Sabatini
Para acompañar nuestra carta de tapas y refrescar las noches de verano de Madrid te proponemos cócteles variados, tanto clásicos como innovadores.
Viruses | Free Full-Text | CD81-Receptor Associations - Impact for Hepatitis C Virus Entry and Antiviral Therapies | HTML
Tetraspanins are integral transmembrane proteins organized in microdomains displaying specific and direct interactions with other tetraspanins and molecular partners. Among them, CD81 has been implicated in a variety of physiological and pathological processes. CD81 also plays a crucial role in pathogen entry into host cells, including hepatitis C virus (HCV) entry into hepatocytes. HCV is a major cause of liver cirrhosis and hepatocellular carcinoma. HCV entry into hepatocytes is a complex process that requires the coordinated interaction of viral and host factors for the initiation of infection, including CD81, scavenger receptor BI, claudin-1, occludin, membrane-bound host cell kinases, Niemann-Pick C1 Like 1, Harvey rat sarcoma viral oncogene homolog (HRas), CD63 and transferrin receptor 1. Furthermore, recent data in HCV model systems have demonstrated that targeting critical components of tetraspanins and associated cell membrane proteins open new avenues to prevent and treat viral infection.
MultiRAE Pumped / 10.6 eV PID / LEL / H₂S / CO / O₂ / Li-ion / Non-Wireless (w/ CSK 4-gas + Iso) - FieldandFacility
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CD36L1 (SR-BI) Antibody, anti-human, REAfinity™ - Recombinant antibodies - MACS Antibodies - Products - Miltenyi Biotec - Canada
Clone REA716 recognizes the human CD36L1 antigen, an integral membrane protein, also known as SR-BI. CD36L1 is widly expressed, e.g. on macrophages, dendritic cells, adrenocortical cells, adipocytes, and trophoblastic cells. In hepatocytes, CD36L1 acts as a receptor for hepatitis C. It has been reported, that CD36L1 is able to bind HCV envelope glycoprotein E2, participate in entry of HCV pseudotype particles, and modulate HCV infection. Furthermore, CD36L1 is a receptor for different ligands such as phospholipids, cholesterol ester, lipoproteins, vitamin E, phosphatidylserine, and apoptotic cells. Additional information: Clone REA716 displays negligible binding to Fc receptors. - Canada
Looking for a Spanish Tapas, Garlic Spread recipe - Food52
Years ago, when I was living in Salamanca Spain, I use to visit a local bar that served the best Tapas. They had one that was a small skewer...
The best Tapas in Birmingham | Sluurpy updated in September
Tapas in Birmingham: Browse the menus and prices. Look at the amazing photos and compare the scores of the most authoritative websites. Read the reviews and get advice from Sluurpy
10 tapas que debes probar en Sevilla | Sevilla4real
Los camareros amables, el arte religioso, el jamón colgado del techo, los clientes que se sientan o se quedan de pie en un bar... ¡Bienvenido a la vida gastronómica de Sevilla! Esta ciudad es el lugar perfecto para descubrir la cocina de Andalucía, ya que es conocida como la capital mundial de la Tapa.
Tapas, the Niyama of Discipline - Yoga
Want to become better at yoga? Practice. Its that simple, and that challenging. - Tapas, the Niyama of Discipline - Yoga at BellaOnline
Best Never Went | Guidos Pizzeria & Tapas | Food & Drink
Tapas restaurants come and go. Maybe they call their food small plates instead of tapas, but they still want to plug into the same long-outdated...
Perfect! - Review of Jimao Tapas e Vinhos, Porto, Portugal - TripAdvisor
Jimao Tapas e Vinhos: Perfect! - See 1,821 traveler reviews, 942 candid photos, and great deals for Porto, Portugal, at TripAdvisor.
Tapas, al Horno y Pan: World Bread Day am 16.10.2020: mein Landbrot mit Vollkorn | Tapas, Vollkorn, Frischkäse aufstrich
23.10.2020 - mein Landbrot mit Vollkorn Preiselbeer- und Schwarzkirschmarmelade auf Frischkäseaufstrich Zutaten: Water Roux: 75 g Wasser 5 g Meh...
LEL KIDZ ENGAGE NEWSLETTER, VOL 12 - LEL Home Services
Make Mud Pies and Mud Art Outdoors! What are the elements kids love the most? Water and dirt, and when you combine the two, they will be in heaven playing outside and creating mud pies. Is there anything better than the feeling of mud squishing between your hands as you mold it into a mud pie? ...
Aralar Tapas bar - Pamplona - Eat
Bar ubicado en el Primer Ensanche de Pamplona. Ha sido premiado en varias ocasiones de la edici n anual de la Semana del Pincho; la ltima en...
Guitarra Especial niños modelo 3ST58 - Guitarras Esteve
Guitarra Especial niños modelo 3ST58. Tapa: Cedro o Abeto sólida . Aros y Fondo: Sapelly. Mástil: Okume. Diapasón: Palosanto o Sonokeling. Escala: 580mm
9780853699798: Essentials of Pharmaceutical Chemistry - IberLibro: 0853699798
Essentials of Pharmaceutical Chemistry en Iberlibro.com - ISBN 10: 0853699798 - ISBN 13: 9780853699798 - Pharmaceutical Press - 2012 - Tapa blanda
Hepatitis C virus resistance to broadly neutralizing antibodies measured using replication-competent virus and pseudoparticles ...
A better understanding of natural variation in neutralization resistance and fitness of diverse hepatitis C virus (HCV) envelope (E1E2) variants will be critical to guide rational development of an HCV vaccine. This work has been hindered by inadequate genetic diversity in viral panels and by a lack of standardization of HCV entry assays. Neutralization assays generally use lentiviral pseudoparticles expressing HCV envelope proteins (HCVpp) or chimeric full-length viruses that are replication competent in cell culture (HCVcc). There have been few systematic comparisons of specific infectivities of E1E2-matched HCVcc and HCVpp, and to our knowledge, neutralization of E1E2-matched HCVpp and HCVcc has never been compared using a diverse panel of human broadly neutralizing monoclonal antibodies (bNAbs) targeting distinct epitopes. Here, we describe an efficient method for introduction of naturally occurring E1E2 genes into a full-length HCV genome, producing replication-competent chimeric HCVcc. We
Additional entry factors have been described more recently such as tyrosine kinase epidermal growth factor-receptor (EGF-R) and...
Additional entry factors have been described more recently such as tyrosine kinase epidermal growth factor-receptor (EGF-R) and Ephrin A2 receptor , the Niemann-Pick C1-like 1 receptor , the transferrin receptor  and the tetraspanin CD63 . an extensive functional study to characterize the ability of these two natural variants to prevent HCV access. We used lentiviral vectors to Centrinone express Wildtype or mutated CLDN6 and OCLN in different cell lines and main human being hepatocytes. HCV illness was then investigated using cell tradition produced HCV particles (HCVcc) as well as HCV pseudoparticles (HCVpp) expressing envelope proteins from different genotypes. Our results show that variants of CLDN6 and OCLN indicated separately or in combination did not impact HCV illness nor cell-to-cell transmission. Hence, our study highlights the difficulty of HCV resistance mechanisms supporting the fact that this process probably not primarily involves HCV access factors and that ...
Hepatitis C Virus Envelope Glycoprotein Fitness Defines Virus Population Composition following Transmission to a New Host - NDM...
Tapas and the theater - Review of Tapas Teatro Cafe, Baltimore, MD - TripAdvisor
Tapas Teatro Cafe: Tapas and the theater - See 122 traveler reviews, 24 candid photos, and great deals for Baltimore, MD, at TripAdvisor.
UK: S&A Foods launches Perween tapas range, eyes huge potential | Food Industry News | just-food
S&A Foods , the UK independent food manufacturer, has unveiled a new range of tapas for home consumption. Of Spanish origin, tapas snacks have been growing in popularity in Europe over the last decade, and S&A Foods managing director Perween Warsi believes it is time to facilitate the introduction of ready-made tapas for convenient use at home.
Tapa and Fermentation - Andrea Eimke
Making Tapa Eastern Pacific Style Te Rangi Hiroa (Peter H. Buck) writes in Arts and Crafts of the Cook Islands that the tapa makers of the time (1944) wrapped the pre-beaten bark in banana leaves and left it to ret for three days. Todays tapa makers on Atiu usually beat the bark right away. When…
Browse by Author/Editor - ePrints Repository
Stamataki, Zania and Coates, Stephen and Evans, Matthew J and Wininger, Mark and Crawford, Kevin and Dong, Christine and Fong, Yiu-Lian and Chien, David and Abrignani, Sergio and Balfe, Peter and Rice, Charles M and McKeating, Jane A and Houghton, Michael (2007) Hepatitis C virus envelope glycoprotein immunization of rodents elicits cross-reactive neutralizing antibodies. Vaccine, 25 (45). pp. 7773-84. ISSN 0264-410X. ...
Gramercy Park Braces for Hostile Tapas Invasion | The Village Voice
Despite staggering community opposition, Cold Miller has managed to secure a liquor license for the small wine and tapas bar hes planning to open at...
The Best Tapas Restaurants in Paris 1rst, Paris - TheFork
FIND THE BEST Tapas restaurants in Paris 1rst, Paris on TheFork. Read restaurant reviews from our community and reserve your table online today!
Barcelona Tapas walking Tour with Flamenco Show | ShoreBee
Shore excursion from Barcelona cruise port. Tapas walking Tour with Flamenco Show. Convenient and comfortable. Check out the unbeatable value for money.
Tanzania Tapas Party - News Online - Chaîne des Rôtisseurs
Tanzania Tapas Party, Dar es Salaam, January 30, 2016. The National Bailliage was inaugurated in November 2015 with a Chapitre at the Hyatt Regency. It was a grand affair!In complete contrast, the first event of the New Year was an informal dining event at the
MultiRAE Lite O2/LEL/CO+H2S/10.6 PID Calibration Station Kit
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Industrial Scientific 1810-9083 Equivalent Calibration Gas: 25% LEL Pe
[[start tab]]Description 25% LEL Pentane / 19% Oxygen / 25 ppm Hydrogen Sulfide / Balance Nitrogen Industrial Scientific multi-mixture calibration gas ...
Streptococcus pneumoniae | mBio
FtsX is a ubiquitous bacterial integral membrane protein involved in cell division that regulates the activity of peptidoglycan (PG) hydrolases. FtsX is representative of a large group of ABC3 superfamily proteins that function as mechanotransmitters, proteins that relay signals from the inside to the outside of the cell. Here, we present a structural characterization of the large extracellular loop, ECL1, of FtsX from the... ...
Publikationen von Dirk Hincha | Max-Planck-Institut für Molekulare Pflanzenphysiologie
Clarke, J. L.; Branza-Nichita, N.; Stavaru, C. S.; Sivertsen, A.; Steen, H.; Paruch, L.; Eerde, A.; Heldal, I.; Dobrica, M.-O.; Tucureanu, C. et al.; Onu, A.; Ciulean, S.; Petrareanu, C.; Lazar, C.; Popescu, I.; Haugslien, S.; Bock, R.; Dubuisson, J.: Lettuce-produced hepatitis C virus E1E2 heterodimer triggers immune responses in mice and antibody production after oral vaccination. In In vitro cellular & developmental biology-plant, 54 (Supplement 1), S. S118 - S119. 14th Quadrennial Congress of the International-Association-of-Plant-Biotechnology (IAPB), Dublin, IRELAND, 19. August 2018 - 24. August 2018. (2018 ...
Tapa recta protección ciclista - Muralba, S.COOP.
Pan-fried squid with hot chorizo - Tapas Revolution
Meanwhile, slice the chorizo and sauté in a pan over a medium heat. Chop the chicory endive and the tomato and mix. Once the chorizo is cook add the vinegar in the pan and mix with the rest of the salad. Serve with the squid, the combination of sea and land ingredients is fabulous ...
QRAE II monitor (LEL, O2, Diffusion, Alkaline batteries) | Shawcity
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2007 LONDON MARATHON - Telegraph
Lel and Zhou beat the heat Kenyas Martin Lel won the mens race of the 2007 Flora London Marathon in blistering heat
Seminars | Mizuguchi Laboratory | Page 2
Title: Investigating the molecular mechanism of COPD in tetraspanin CD9/CD81 DKO mice- a new model for ageing. 6/9 Yuko Tsuchiya. 6/16 Special seminar 15:00 ...
hcg brand - Page 1 - HCG Diet Info Forums
Hello all what would you consider to be the best hcg brand and what were your experiences Im between getting hucog or ovidiac Sent from my SPH-L720 using Tapa
Esto es Hoy en @sensesgastrobar Mañana bailarás toda la noche al ritmo de @labandaswing y no te pierdas las estupendas...
Esto es Hoy en @sensesgastrobar Mañana bailarás toda la noche al ritmo de @labandaswing y no te pierdas las estupendas promociones en tus tragos y tapas favoritas. Ahora activos hasta las 2am! #senses #gastrobar #food #foodie #puntofijo #falcon #venezuela #chef #drinks
Welcome to El Parador
During the summer months, our garden offers a delightful alternative to eating inside. It really is the perfect place to enjoy our range of tapas. We can happily cater for parties outside - please call for more information. ...
so2 detection systems nantong
that it remains below the Lower Explosive Limit (LEL) (4.3% by volume). Additionally, the presence of rising concentrations of SO2 in the sulfur pit vapour space provides an early indication of smoldering fires.Therefore, on-line, continuous monitoring of SO2 can enable detection of
Cht l zab t l ka e, aby se pomstil - iDNES.cz
Michal Ulom mu , kter loni v kv tnu brut ln napadl ma etou sv ho n kdej ho psychiatra Karla Hynka - pom lel na sv j in nejm n rok dop edu. Docenta beru sebou do pekla, napsal si do den ku v b eznu 2002. Jeho p b h, o n m MF DNES z skala detailn informace, je p b hem ne astn ho mu e.
Nezku en nov ek James Bond. Po tek agenta 007 vymysl autor knih pro d ti | Kultura | Lidovky.cz
Britsk spisovatel Anthony Horowitz se proslavil d tskou kni n s ri o detektivovi Alexu Riderovi. Poda ilo se mu z skat pr va na Jamese Bonda od rodiny Iana Flemminga, autora cel postavy. Jeho prvn bondovsk rom n se rodin tak l bil, e Horowitzovi umo n ud lat n co, co Ian Flemming zam lel, ale u nestihl - vymyslet pln za tky agenta s k dov m ozna en m 007.
No data available that match "antigens cd81"
MoleculeAntibodiesReceptorProteinCD63CD82Monoclonal AntibodyGeneDifferentiationCD21CD19 and CD81MembraneTetraspaninsAnti-CD81Surface antigenLymphocyteIsotypePeptideIntegrinCD53CVID6Antiproliferative AntibodySpeciesGlycoproteinSuperfamilyBindsHumanTumorMoleculesMaturationMember of the TM4SF tetraspanin familyCellsReactivitySolubleProteinsIntegrinsReceptorsVariety of antigensGenesInteractionsAntibody deficiencyMice
- CD81 (CD81 Molecule) is a Protein Coding gene. (genecards.org)
- In our study, we combined single-molecule microscopy and biochemistry experiments to investigate the clustering and membrane behaviour of CD81 in the context of cells expressing EWI-2wint, a natural inhibitor of HCV entry. (nih.gov)
- CD81 (TAPA-1): a molecule involved in signal transduction and cell adhesion in the immune system. (nih.gov)
- Collectively the results obtained with this new structural model of E2c suggest the development of small molecule inhibitors such as 281816 that target E2 and disrupt its interaction with CD81 may provide a new paradigm for HCV treatment. (nih.gov)
- CD81 molecule, also known as CD81 (Cluster of Differentiation 81), is a protein which in humans is encoded by the CD81 gene. (wikipedia.org)
- Cell-surface expression of one or all of the candidate receptor molecules (CD81, low-density lipoprotein receptor, scavenger receptor class B type 1, and dendritic cell-specific intercellular adhesion molecule 3 grabbing nonintegrin) failed to confer permissivity to HIV-HCV pseudotype infection. (pnas.org)
- Truncated soluble versions of E2 have been reported to bind specifically to human cells and were used to identify interactions with CD81 ( 7 , 8 ), scavenger receptor class B type 1 (SR-B1) ( 12 ), and dendritic cell-specific intercellular adhesion molecule 3 grabbing nonintegrin (DC-SIGN) ( 13 , 14 ). (pnas.org)
- Today, the HLDA Workshop meeting has been held 10 times and has over 371 CD antigens molecule have been identified. (sinobiological.com)
- CD81 is a widely expressed and evolutionary conserved molecule that associates with different proteins in different cell types ( ref/abstract ). (stanford.edu)
- CD81 is required for normal immune responses, lack of this molecule results in weaker early antibody responses to protein antigens, specifically Th2 responses ( ref/abstract ). (stanford.edu)
- CD81 is required for the normal expression of the CD19 signaling molecule in B cells ( ref/abstract ). (stanford.edu)
- CD81 is also critical for infection of human hepatocytes by Plasmodium falciparum sporozoites, highlighting the importance of this molecule in the most widespread infectious disease known to mankind ( ref/abstract ). (stanford.edu)
- The short antigen peptide is complexed to MHC class II molecule. (yourarticlelibrary.com)
- The quality of each exosome preparation was confirmed by hybridization with antihuman leukocyte antigen (HLA) antibodies. (nih.gov)
- Human peripheral blood mononuclear cells (PBMCs) were stained with CD81 antibodies or with the corresponding REA Control (S) antibodies (left images). (miltenyibiotec.com)
- Now Offering Over 102,157 Antibodies & 44,722 Antigens! (avivasysbio.com)
- Numerous antibodies have been described that potently neutralize a broad range of hepatitis C virus (HCV) isolates and the majority of these antibodies target the binding site for the cellular receptor CD81 within the major HCV glycoprotein E2. (frontiersin.org)
- One of the most striking findings from these studies is that the same segments of the E2 polypeptide chain induce antibodies targeting distinct antigen conformations. (frontiersin.org)
- The observation, by Ray Owen and colleagues in 1954, that D-negative women were less likely to form anti-D antibodies against their D-positive fetus if their mother possessed the D-antigen, was not found in all later studies. (haematologica.org)
- For mismatched red blood cell antigens the mother was exposed to, whether or not antibodies were formed, we determined whether her mother, the grandmother, carried these antigens. (haematologica.org)
- Maternal antibodies against IPAs expressed on red blood cells (RBC) such as Rh and K antigens, can cause severe hemolytic disease of the fetus and newborn (HDFN). (haematologica.org)
- The expression of both CD19 and CD81 was determined with 3 different monoclonal antibodies. (jci.org)
- Imai T, Yoshie O: C33 antigen and M38 antigen recognized by monoclonal antibodies inhibitory to syncytium formation by human T cell leukemia virus type 1 are both members of the transmembrane 4 superfamily and associate with each other and with CD4 or CD8 in T cells. (exbio.cz)
- Fukudome K, Furuse M, Imai T, Nishimura M, Takagi S, Hinuma Y, Yoshie O: Identification of membrane antigen C33 recognized by monoclonal antibodies inhibitory to human T-cell leukemia virus type 1 (HTLV-1)-induced syncytium formation: altered glycosylation of C33 antigen in HTLV-1-positive T cells. (exbio.cz)
- Anti-CD81 antibodies downregulate HIV production 3 fold, however the CD81 protein free virus is more infectious. (wikipedia.org)
- See our complete line of Immunohistochemistry Reagents including antigen retrieval solutions, blocking agents ABC Detection Kits and polymers, biotinylated secondary antibodies, substrates and more. (lsbio.com)
- Conserved epitopes like the viral CD81-binding site are targeted by rare broadly neutralizing antibodies. (uni-koeln.de)
- Results: Mutant viruses bound soluble CD81 and antibodies targeting the CD81 binding site with enhanced efficacy. (uni-koeln.de)
- The virus-containing vacuoles were also labeled with antibodies against LAMP-1, CD81, and CD82, which were also incorporated into the viral envelope. (rupress.org)
- Only antibodies against antigens found in late endosomes precipitated infectious virus, whereas antibodies against proteins located primarily on the cell surface did not. (rupress.org)
- AP33-related anti-idiotypes (Ab₂s) have the potential to carry the internal image of the antigen E2, eliciting the production of AP33-like antibodies in humans. (bl.uk)
- We have so far established high quality monoclonal antibodies against human CD9, CD63 and CD81, which are members of tetraspanin superfamily and utilized as exosomal surface markers. (cosmobio.co.jp)
- Moreover, the combination of these antibodies with one against a cancer cell surface antigen resulted in sensitive detection of cancer cell derived exosomes. (cosmobio.co.jp)
- CD antigens for cluster of differentiation, which indicates a defined subset of cellular surface receptors (epitopes) that identify cell type and stage of differentiation, and which are recognized by antibodies. (sinobiological.com)
- 23499492 ). Upon initial encounter with a microbial pathogen, enables the assembly of CD19-CR2 and B cell receptor complexes at signaling TERMs, lowering the threshold dose of antigen required to trigger B cell clonal expansion and humoral immune response (By similarity). (uniprot.org)
- Associates with CLDN1 and the CLDN1-CD81 receptor complex is essential for HCV entry into host cell. (nih.gov)
- CD81 is a major receptor for Hepatitis C Virus (HCV). (nih.gov)
- In addition, we showed that EWI-2wint influences the colocalization of CD81 with Claudin-1 - a co-receptor required for HCV entry. (nih.gov)
- This unprecedented flexibility extends to the entire binding site for the cellular receptor CD81, underlining the importance of dynamic analyses to understand (1) the interplay between HCV and the humoral immune system and (2) the relevance of this structural flexibility for virus entry. (frontiersin.org)
- In particular, the receptor-binding glycoprotein E2 contains major antigenic determinants of HCV, mostly overlapping with binding sites for cellular receptors, including scavenger receptor class B type 1 (SR-B1) ( 5 ), the low-density lipoprotein receptor (LDLr) ( 6 ), and the tetraspanin CD81 ( 7 ). (frontiersin.org)
- B cells that respond are propagated and undergo a process called hypermutation, where their genes are rearranged to create a B cell receptor that better fits the foreign antigen. (news-medical.net)
- B cells are activated when they bind to an antigen through a B cell receptor. (news-medical.net)
- The surface receptor CD21 can enhance B cell activation in complex with CD19 and CD81. (news-medical.net)
- In that process, the B cell receptor binds an antigen tagged with a fragment of C3 complement protein, and CD21 binds the fragment. (news-medical.net)
- B cells can also undergo T cell dependent activation, which occurs when a B cell receptor binds a T cell-dependent antigen. (news-medical.net)
- CD19 functions in a complex with CD21, CD81, and CD225 to signal with the B cell receptor upon antigen recognition. (jci.org)
- Similar to CD19-deficient patients, CD81-deficient patients had B cells that showed impaired activation upon stimulation via the B cell antigen receptor but no overt T cell subset or function defects. (jci.org)
- A first signal, which is antigen-specific, is provided through the T cell receptor (TCR) which interacts with peptide-MHC molecules on the membrane of antigen presenting cells (APC). (wikipedia.org)
- HCV-E2 engaged CD81 is only 30% internalized after 12hr, suggesting CD81 may be primarily an attachment receptor for HCV. (wikipedia.org)
- The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigens displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. (mybiosource.com)
- Defects in the genes that encode for inducible costimulator (ICOS), transmembrane activator and CAML interactor (TACI), CD19, B-cell activating factor receptor (BAFFR), CD81, CD20, and CD21 have been reported [ 1 , 4 - 6 ]. (hindawi.com)
- CD21 is the receptor for the C3 fraction of complement and is involved in signal transduction pathways triggered by the B cell receptor (BCR) with CD19 and CD81. (hindawi.com)
- However, HIV-HCV pseudotype infectivity was inhibited by a recombinant soluble form of CD81 and a mAb specific for CD81, suggesting that CD81 may be a component of a receptor complex. (pnas.org)
- CD81 has also been identified as en essential receptor for HCV (hepatitis C virus) (PMID: 21428934). (ptglab.com)
- HCV-neutralizing antibody AP33 recognizes a linear, highly conserved epitope on the viral entry protein E2, disrupting the interaction with the cellular receptor CD81 that leads to viral entry. (bl.uk)
- 6] The presence of a transmembrane protein known as CD81 on the surface of these B cells may provide a pathway through which HCV can cause B-cell activation via the B-cell receptor. (cancernetwork.com)
- For example, CD81 is a receptor for hepatitis C virus and for malarial parasites ( 11 , 41 ), and CD9 is a coreceptor for diphtheria toxin ( 21 ). (asm.org)
- Low affinity receptor for IgE, ligand for CD19, CD21 and CD81. (sinobiological.com)
- CD81 along with human scavenger receptor SR-BI, and tight junction molecules claudin-1 (CLDN) and occludin (OCLN) are the most important receptors that mediate HCV entry (46). (thefreedictionary.com)
- The tetraspanin CD81 was originally identified in our laboratory as a receptor that controls cell growth. (stanford.edu)
- CD81 is the putative receptor for HCV, CD81 is also required for infection by malaria. (stanford.edu)
- My laboratory has been engaged in HCV related research since the identification of CD81 as the putative receptor of this virus. (stanford.edu)
- Assembles with the antigen receptor of B-lymphocytes in order to decrease the threshold for antigen receptor-dependent stimulation. (cusabio.com)
- Duffy antigen/chemokine receptor ( DARC ), also known as Fy glycoprotein ( FY ) or CD234 ( C luster of D ifferentiation 234), is a protein that in humans is encoded by the ACKR1 gene . (wikipedia.org)
- CD81 has been also identified as a receptor for the hepatitis C virus. (sysmex-flowcytometry.com)
- The sIg-antigen complex is internalized into the B cell by endocytosis (referred to as receptor-mediated or immuno- globulin-mediated endocytosis). (yourarticlelibrary.com)
- 1. The T cell receptor (TCR) of helper T cell binds to the MHC class II-antigen peptide complex on the B cell. (yourarticlelibrary.com)
- CD81 (TAPA-1) is a widely expressed cell-surface protein involved in an astonishing variety of biologic responses. (nih.gov)
- These mice do exhibit diminished antibody responses to protein antigens. (nih.gov)
- Clone REA513 recognizes the human CD81 antigen, a multi-pass membrane protein also known as TAPA-1. (miltenyibiotec.com)
- On the other hand, CD81 belongs to the tetraspanin family, which has been described as organizers of protein microdomains on the plasma membrane. (jimmunol.org)
- EVs derived from antigen presenting cells (APCs) that are loaded with either peptide or whole protein antigens are reported to induce anti-tumor immunity in animal models but show only modest improvements in cancer patients ( 2 , 7 - 9 ). (frontiersin.org)
- Recognizes CD81/ TAPA-1 antigen, a 23 kDa (smear) protein. (cellsciences.com)
- The Eat-2 monoclonal antibody reacts with mouse CD81, a 26kDA non-glycosylated transmembrane protein. (peprotech.com)
- The major HCV envelope protein E2 has been shown to bind to CD81. (pubmedcentralcanada.ca)
- This Polyclonal antibody is directed against human CD81 protein. (lsbio.com)
- CD81 (also known as TAPA1or TSPAN28) is a membrane protein of the tetraspanin superfamily, which are characterized by the presence of four conserved transmembrane regions. (ptglab.com)
- Angelisova P, Vlcek C, Stefanova I, Lipoldova M, Horejsi V. The human leucocyte surface antigen CD53 is a protein structurally similar to the CD37 and MRC OX-44 antigens. (springer.com)
- Q226 is involved in recognizing the CD8 protein, and the binding of CD8 to MHC class I is crucial to MHC class I's function in stimulating T lymphocytes to respond to foreign peptide antigens presented by MHC class I. Therefore I expect Q226 to be highly conserved. (proteopedia.org)
- We mapped the critical amino acid of CD81 involved in binding the viral envelope protein. (stanford.edu)
- HIV gag proteins use tetraspanin enriched microdomains (containing minimally CD81, CD82, CD63) as a platform for virion assembly and release. (wikipedia.org)
- CD63 is a 53 kD type III lysosomal glycoprotein also known as LIMP, LAMP-3, gp55, and melanoma-associated antigen (ME491). (biolegend.com)
- CD63 has been shown to associate with CD9, CD81, VLA-3, and VLA-6. (biolegend.com)
- Here, we reveal the presence of tetraspanin-enriched microdomains (TEMs) containing the tetraspanins CD9, CD63, CD81, and CD82 at the plasma membrane. (rupress.org)
- CD63 antigen is a member of the TM4 superfamily with its structure consisting of four transmembrane regions, short cytoplasmic N and C-termini and two extracellular regions. (leicabiosystems.com)
- CD63 antigen is widely distributed on the surface and interior of both hematopoietic and non-hematopoietic cells such as most sweat glands, islets of Langerhans, pituitary, pancreas, peribronchial glands, Paneth cells and prostate glands. (leicabiosystems.com)
- CD63 antigen associates non-covalently with CD9, CD81 and the integrins VLA-3, VLA-4 and VLA-6. (leicabiosystems.com)
- It is reported that CD63 antigen may play a role as a tumor suppressor gene, as its expression in human melanoma cells reduces tumor spread and metastasis. (leicabiosystems.com)
- Exosomes are 50-90 nm diameter vesicles containing antigen presenting molecules (MHC class I, class II, CD1, hsp70-90) tetraspan molecules (CD9, CD63, CD81), adhesion molecules (CD11b, CD54) and CD86 costimulatory molecules [ 17 - 19 ] i.e the necessary machinery required for generating potent immune responses. (biomedcentral.com)
- Thus, association of HTLV-1 Gag with tetraspanin-enriched microdomains is mediated by the inner loops of CD81 and CD82. (nih.gov)
- Imai T, Kakizaki M, Nishimura M, Yoshie O: Molecular analyses of the association of CD4 with two members of the transmembrane 4 superfamily, CD81 and CD82. (exbio.cz)
- Some are involved in oncogenesis and in the control of metastasis: CD9, CD81, CD82, C0/029, and CD151 can all modulate cancer cell motility both in vitro and in vivo (reviewed in references 5 and 49). (asm.org)
- The following antibody was used in this experiment: CD81 Monoclonal Antibody (Eat2) from Thermo Fisher Scientific, catalog # MA1-80209, RRID AB_929499. (thermofisher.com)
- The mouse monoclonal antibody recognizes human CD81, a member of the transmembrane 4/ tetraspanin family. (cellsciences.com)
- CD81 cross-linking by monoclonal antibody (mAb) specific for CD81 or by immobilized E2 have been shown to result in costimulatory signals for human T cells. (pubmedcentralcanada.ca)
- CD81 antibody LS-C742193 is an unconjugated mouse monoclonal antibody to CD81 from human, feline and rabbit. (lsbio.com)
- In this study, we present what we believe to be the first antibody deficiency syndrome caused by a mutation in the CD81 gene and consequent disruption of the CD19 complex on B cells. (jci.org)
- Summary: TEHRAN (FNA)- Researchers found that mutations in the CD81 gene are the genetic cause of antibody deficiency. (thefreedictionary.com)
- The Duffy antigen gene was the fourth gene associated with the resistance after the genes responsible for sickle cell anaemia , thalassemia and glucose-6-phosphate dehydrogenase . (wikipedia.org)
-  The gene was first localised to chromosome 1 in 1968, and was the first blood system antigen to be localised. (wikipedia.org)
- The CD antigens / Cluster of differentiation nomenclature was established in the 1st International Workshop and Conference on Human Leukocyte Differentiation Antigens (HLDA), which was held in Paris in 1982. (sinobiological.com)
- Brackman D, Lund-Johansen F, Aarskog D. Expression of leukocyte differentiation antigens during the differentiation of HL-60 cells induced by 1,25-dihydroxyvitamin D3: comparison with the maturation of normal monocytic and granulocytic bone marrow cells. (springer.com)
- CD81 forms complexes with other tetraspanin proteins, integrins, coreceptors, MHC class I and II molecules, and influences adhesion, morphology, activation, proliferation and differentiation of B, T and other cells, e.g. in muscles CD81 promotes cell fusion and myotube maintenance. (sysmex-flowcytometry.com)
- On B cells CD81 is part of a complex with CD21, CD19, and Leu13. (nih.gov)
- Expression of CD21 forms a complex with CD19 and CD81 to form the B cell coreceptor and it can serve as antigen-presenting cells, secrete cytokines, and differentiate into plasma cells that produce and secrete immunoglobulins (Foote et al. (thefreedictionary.com)
- B lenfositlerinin yuzeyinde B hucre almaci (reseptoru) ile birlikte CD19, CD21, CD81 ve CD225 gibi ko-reseptorler de bulunmaktadir (13). (thefreedictionary.com)
- CD19 molekulu CD21, CD81 ve CD225 ile B hucre reseptor kompleksi olusturarak antijen baglanmasi sonrasi B hucre reseptor sinyallerini kuvvetlendirir. (thefreedictionary.com)
- After the naive mature B lymphocyte contacts the immunogen through surface IgM and/or IgD [with or without the B-lymphocyte CD21 (CR2), CD19, CD81 coreceptor interaction], help must be supplied by T-helper 1 or 2 cells to class switch to IgG (affinity maturation takes place as well). (thefreedictionary.com)
- CD81 play role as a member of CD19/CD21/Leu-13 signal transdiction complex. (acmbcb.org)
CD19 and CD812
- Together, our results indicate that a change in membrane partitioning of CD81 occurs in the presence of EWI-2wint. (nih.gov)
- These data indicate that CD9 and CD81 have an important role in membrane fusion induced by HIV-1 envelope. (jimmunol.org)
- The antigen is then taken up into the B cell and presented to T cells on the cell membrane. (news-medical.net)
- Retroviral transduction and glycosylation experiments on EBV-transformed B cells from the patient revealed that CD19 membrane expression critically depended on CD81. (jci.org)
- B ). The patient's lymphocytes also completely lack CD81 membrane expression. (jci.org)
- A second signal, the co-stimulatory signal, is antigen nonspecific and is provided by the interaction between co-stimulatory molecules expressed on the membrane of APC and the T cell. (wikipedia.org)
- B cell binds antigens with its BCR (a membrane-bound antibody), which transfers intracellular signals to the B cell as well as inducing the B cell to engulf the antigen, process it, and present it on the MHC II molecules. (wikipedia.org)
- Tetraspanins form multimolecular complexes with each other and with other membrane proteins, including integrins, major histocompatibility complex antigens, signaling complexes, and cell-associated growth factors. (asm.org)
- Deneka M, Pelchen-Matthews A, Byland R, Ruiz-Mateos E, Marsh M. In macrophages, HIV-1 assembles into an intracellular plasma membrane domain containing the tetraspanins CD81, CD9, and CD53. (springer.com)
- CD81 is required for membrane reorganization during fertilization, cd81-/- eggs do not fuse with sperm, resulting in female infertility ( ref/abstract ). (stanford.edu)
- Anti-CD81 can activate integrin alpha 4 beta 1 (VLA-4) on B cells, facilitating their adhesion to tonsilar interfollicular stroma. (nih.gov)
- Similarly, anti-CD81 can activate alpha L beta 2 (LFA-1) on human thymocytes. (nih.gov)
- CD81 can also affect cognate B-T cell interactions because anti-CD81 increases IL-4 synthesis by T cells responding to antigen presented by B cells but not by monocytes. (nih.gov)
- In addition, anti-CD81 Abs triggered its clustering in patches, where CD4 and CXCR4 were included. (jimmunol.org)
- Rat anti Mouse CD8 antibody, clone YTS169.4 recognizes the murine CD8 cell surface antigen, expressed by a subset of T lymphocytes. (mybiosource.com)
- This I-domain containing alpha integrin combines with the beta 2 chain (ITGB2) to form the integrin lymphocyte function-associated antigen-1 (LFA-1), which is expressed on all leukocytes. (cancerindex.org)
- Human peripheral blood lymphocytes were stained with CD81 (clone 5A6) Pacific Blue™ (filled histogram) or mouse IgG1, κ isotype control Pacific Blue™ (open histogram). (biolegend.com)
- 1X10^6 human peripheral blood lymphocytes were surface stained with 5 ul CoraLite®488-conjugated Anti-Human CD81 (CL488-65195, Clone: 5A6) (green) or isotype control antibody (black). (ptglab.com)
- Non peptide antigen presentation to T-cell receptors on NKT cells. (sinobiological.com)
- The MHC class Il-antigen peptide complex is transported to the B cell surface and expressed on the surface of B cell. (yourarticlelibrary.com)
- The MHC class II antigen peptide complex on B cell is presented to the T H cell. (yourarticlelibrary.com)
- CD81 induces B cell adhesion via VLA-4 integrin and has been shown to play a role in early T cell development. (biolegend.com)
- Angelisova P, Hilgert I, Horejsi V. Association of four antigens of the tetraspans family (CD37, CD53, TAPA-1, and R2/C33) with MHC class II glycoproteins. (springer.com)
- CVID6 is a primary immunodeficiency characterized by antibody deficiency, hypogammaglobulinemia, recurrent bacterial infections and an inability to mount an antibody response to antigen. (abcam.com)
- CD81 is a 26 kD non-glycosylated member of the tetraspanin superfamily (TM4SF), also known as TAPA-1 (target of an antiproliferative antibody). (biolegend.com)
- The species-specific traits in CD9 and CD81 distribution during sperm maturation were compared between mice and humans. (antikoerper-online.de)
- CD81 is a 26kD cell surface glycoprotein that is also known as TAPA-1. (thermofisher.com)
- CD81 is a cell surface glycoprotein that is known to complex with integrins. (cellsciences.com)
- The large extracellular loop of CD81 binds the hepatitis E2 glycoprotein dimer. (wikipedia.org)
- The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. (mybiosource.com)
- Cloning of the virus enabled the production of the recombinant envelope glycoprotein E2, which in turn, was shown to bind to human CD81. (stanford.edu)
- CD81 interacts directly with immunoglobulin superfamily member 8 (IGSF8, CD316) and CD36. (wikipedia.org)
- CD81 is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. (lsbio.com)
- Along with CLDN1, LDL-R, and the tetraspanin superfamily member CD81, SCARB1 has been reported to be an entry factor for the Hepatitis C virus. (fishersci.com)
- A T helper cell activated with the same antigen recognizes and binds the antigen complex, triggering a cascade of signals. (news-medical.net)
- Whereas, a resting B cell, which binds to the antigen through the B cell surface immunoglobulin (sigs) becomes activated. (yourarticlelibrary.com)
- The antigen binds to sIgs on B cell and cross-links the sIgs. (yourarticlelibrary.com)
- Tissue, cells or virus corresponding to Human CD81. (abcam.com)
- CD81 is required for Plasmodium vivax sporozoite entry into human hepatocytes and for Plasmodium yoelii sporozoite entry into murine hepatocytes. (wikipedia.org)
- CD81 antibody LS-B6373 is an unconjugated rabbit polyclonal antibody to human CD81. (lsbio.com)
- CL488-65195 targets CD81 in FC applications and shows reactivity with Human samples. (ptglab.com)
- Human Antibody Laboratories manufactures the human serum contain antigen or antibody reagents distributed by Genprice. (muzeumamonitow.pl)
- The Human Serum Contain Antigen Or Antibody reagent is RUO (Research Use Only) to test human serum or cell culture lab samples. (muzeumamonitow.pl)
- Description: Alpha Fetoprotein, Antigen Grade, Cancer antigen from Human Cord Serum, 1.0 mg/Vial. (muzeumamonitow.pl)
- CD81 has been implicated in the pathogenesis of two major human diseases: hepatitis C virus (HCV) and malaria. (stanford.edu)
- We determined the structural basis for the interactions of the viral envelope proteins with human CD81. (stanford.edu)
- Given the aberrant expression of specific genes in a variety of cancer types, restricted in testis or selected in normal tissue, cancer-testis antigens (CTAs) have emerged as efficient specific tumor targets which spare normal tissue from incurring damage during treatment 3 . (nature.com)
- These observations support the proposal that nano-sized EVs can be used as carriers to deliver soluble antigens in tumor models ( 10 ). (frontiersin.org)
- CD antigens are used widely for research, immunotherary, tumor and drug target. (sinobiological.com)
- Fifteen patients fullfilling the inclusion criteria (stage IIIB and IV, HLA-A1 + , or -B35 + and HLA-DPO4 + leukocyte phenotype, tumor expressing MAGE3 antigen) were enrolled from 2000 to 2002 and received four exosome vaccinations. (biomedcentral.com)
- Interestingly, we found that EWI-2wint reduces the global diffusion of CD81 molecules due to a decrease of the diffusion rate of mobile CD81 molecules and an increase in the proportion of confined molecules. (nih.gov)
- Computational docking of a diverse library of 1,715 small molecules to this model led to the identification of a set of 34 ligands predicted to bind near conserved amino acid residues involved in the HCV E2: CD81 interaction. (nih.gov)
- Dendritic cells displaying co-stimulatory molecules while presenting antigen are able to activate T cells. (wikipedia.org)
- In contrast, T cells that recognize antigen presented by a dendritic cell not displaying co-stimulatory molecules are generally driven to apoptosis, or may become unresponsive to future encounters with the antigen. (wikipedia.org)
- Both in DC lysates and on the surface of living cells, I-A and I-E molecules engaged in lateral interactions not observed on other antigen-presenting cells such as B blasts. (semanticscholar.org)
- The CD antigens are protocol used for the identification and investigation of cell surface molecules providing targets for immunophenotyping of cells. (sinobiological.com)
- Antigen binding to sIgs on B cell also induces the B cell to express large number of class II molecules and B7 molecules on B cell surface. (yourarticlelibrary.com)
- In T cells, associates with CD4 or CD8 coreceptors and defines the maturation state of antigen-induced synapses with B cells (By similarity). (uniprot.org)
- In fetal thymic organ culture, mAb to CD81 block maturation of CD4-CD8- thymocytes, and expression of CD81 on CHO cells endows those cells with the ability to support T cell maturation. (nih.gov)
- During the different steps of their maturation, B cells circulate between splenic follicles, lymph nodes, and bone marrow, until they undergo apoptosis or are activated by an antigen. (hindawi.com)
- Plasmodium sporozoites mature in the liver to merozoites, the stage that infects red blood cells, this maturation step is CD81-dependent. (stanford.edu)
Member of the TM4SF tetraspanin family1
- Mouse monoclonal to CD81.COB81 reacts with the CD81, a target for anti-proliferative antigen (TAPA-1) with 26 kDa MW, which ia a member of the TM4SF tetraspanin family. (acmbcb.org)
- This study gives new insights on the mechanism by which HCV enters into its target cells, namely by exploiting the dynamic properties of CD81. (nih.gov)
- Similarly on T cells CD81 associates with CD4 and CD8 and provides a costimulatory signal with CD3. (nih.gov)
- However, CD81-deficient mice express normal numbers and subsets of T cells. (nih.gov)
- In rodents CD81 is expressed at much higher levels on resting B cells than on T cells, although increased expression on T cells is found following activation. (thermofisher.com)
- CD81 is expressed by epithelial and endothelial cells, T and B cells, as well as natural killer (NK) cells. (miltenyibiotec.com)
- Accordingly, overexpression of CD81 and CD9 rendered cells less susceptible to Env-mediated syncytia formation. (jimmunol.org)
- Mature B cells in the peripheral blood are tested for their ability to recognize foreign antigens. (news-medical.net)
- Impaired CD19 expression and signaling, enhanced antibody response to type II T independent antigen and reduction of B-1 cells in CD81-deficient mice. (harvard.edu)
- The antibody M38 reacts with CD81, a 25 kDa member of the tetraspanin family, expressed on majority of cells. (exbio.cz)
- Co-stimulation is a secondary signal which immune cells rely on to activate an immune response in the presence of an antigen-presenting cell. (wikipedia.org)
- The latter case induces recognition by antigen-specific Th2 cells or Tfh cells, leading to activation of the B cell through binding of TCR to the MHC-antigen complex. (wikipedia.org)
- This additional binding makes the B cells 100- to 10,000-fold more sensitive to antigen. (wikipedia.org)
- Purified HIV produced by MOLT\HIV cells contains CD81. (wikipedia.org)
- Engagement of CD81 lowers the signaling threshold required to trigger T-Cell\CD3 mediated proviral DNA in CD4+ T cells. (wikipedia.org)
- Thus, HCV binding to natural killer (NK) cells could result in the cross-linking of CD81. (pubmedcentralcanada.ca)
- To explore this possibility, we investigated whether cross-linking CD81 on NK cells could alter NK cell function. (pubmedcentralcanada.ca)
- In this study, we show that CD81 cross-linking via immobilized E2 or mAbs specific for CD81 inhibits not only non major histocompatibility complex-restricted cytotoxicity mediated by NK cells but also interferon (IFN)-γ production by NK cells after exposure to interleukin (IL)-2, IL-12, IL-15, or CD16 cross-linking. (pubmedcentralcanada.ca)
- These results show that CD81 cross-linking mediates completely different signals in NK cells versus T cells. (pubmedcentralcanada.ca)
- In this study, we have investigated whether cross-linking CD81 on NK cells can alter NK cell function. (pubmedcentralcanada.ca)
- Upon activation by an antigen, B cells differentiate either into plasma cells [ 12 ] or into memory B cells. (hindawi.com)
- Mast cell-derived IL-13 downregulates IL-12 production by skin dendritic cells to inhibit the TH1 cell response to cutaneous antigen exposure. (childrenshospital.org)
- 13 CD169 + macrophages directly present captured antigen to T cells or natural killer (NK) T cells 17 and are adept at transferring antigen to CD8α + DC and B cells. (bloodjournal.org)
- The cDNA encoding the corresponding antigen was cloned from megakaryoblastic leukemia cells and shown to be a member of the transmembrane 4 or tetraspanin family ( 10 ). (asm.org)
- Are there differences between laboratories that use of fail to use the CDC's guidelines to measure CD41 and CD81 T cells? (thefreedictionary.com)
- Therefore, it is conceivable that antigen spreading initiated by the specific T cells and/or intervention of alternate effectors also elicited by mature DC [ 11 , 12 ] might account for this apparent discrepancy. (biomedcentral.com)
- CD81 is broadly expressed on hemapoietic cells and enothelial and epithelial cells, but absent from erythrocytes and platelets as well as neutrophils. (acmbcb.org)
- Anti-CD19-chimeric antigen receptors T cells synergistically exerted collaborative cytotoxicity against primary double-hit lymphoma cells with anti-CD38-chimeric antigen receptors T cells. (cusabio.com)
- The Duffy antigen is located on the surface of red blood cells , and is named after the patient in whom it was discovered. (wikipedia.org)
- CD81 (TAPA-1), a member of the tetraspanin family, is expressed on virtually all nucleated cells, but above all on germinal center B cells. (sysmex-flowcytometry.com)
- The developing B cells capable of reacting with self-antigens are killed in the bone marrow. (yourarticlelibrary.com)
- When the memory B cell happens to contact the similar antigen (which induced the production of memory B cells from an activated B cell), the memory B cell gets activated. (yourarticlelibrary.com)
- The impairment in Th2 responses is physiologically important, as cd81 -/- mice do not develop allergen-induced airway hyper-reactivity ( ref/abstract ). (stanford.edu)
- Exposure of the CD81-binding site and conserved epitopes was quantified by soluble CD81 and antibody interaction and neutralization assays. (uni-koeln.de)
- We hypothesize that CD81 affects a multitude of cell functions because it is essential for the spatial orientation of its associated/partner proteins in membranes. (stanford.edu)
- CD81 is also physically and functionally associated with several integrins. (nih.gov)
- Co-stimulation is required in addition to the antigen-specific signal from their antigen receptors. (wikipedia.org)
Variety of antigens1
- 13 , 17 CD169 + macrophages sample a wide variety of antigens and participate in generation of immunity to tumors and viruses but may also down-regulate immune responses to self-tissue. (bloodjournal.org)
- Pattern of expression of tetraspanin antigen genes in Burkitt lymphoma cell lines. (springer.com)
- CD81 enhances cognate T-B cell interactions and greatly augments intracellular activation pathways leading to Th2 polarization ( ref/abstract ). (stanford.edu)
- APRIL expression is upregulated in atopic dermatitis skin lesions and at sites of antigen driven allergic skin inflammation in mice. (childrenshospital.org)
- Interestingly, CD169 −/− mice demonstrated an enhanced response to antigen-pulsed exosomes. (bloodjournal.org)
- This is supported by experiments showing that hepatic CD81 expression is increased in Pcsk9 (KO) mice and PCSK9 downregulates CD81 independently of LDL-R. (thefreedictionary.com)
- To better define the role of CD81 we created CD81-deficient mice. (stanford.edu)
- To determine its role we generated CD81 knockout (cd81-/-) mice. (stanford.edu)
- cd81 -/- mice are resistant to infection by Plasmodium yoelii sporozoites. (stanford.edu)