Activation of CXCR4 by the CXC chemokine stromal cell-derived factor-1 (SDF-1) requires interaction of the amino-terminal domains of both molecules. We report that proteinases released from either mononucleated blood cells or polymorphonuclear neutrophils degranulated by inflammatory stimuli generate an SDF-1 fragment that is deleted from amino-terminal residues Lys(1)-Pro(2)-Val(3), as characterized by mass spectrometry analysis. The proteolyzed chemokine fails to induce agonistic functions and is unable to prevent the fusogenic capacity of CXCR4-tropic human immunodeficiency viruses. Furthermore, we observed that exposure of CXCR4-expressing cells to leukocyte proteinases results in the proteolysis of the extracellular amino-terminal domain of the receptor, as assessed by flow cytometry analysis and electrophoretic separation of immunoprecipitated CXCR4. Blockade of SDF-1 and CXCR4 proteolysis by the specific leukocyte elastase inhibitor, N-methoxysuccinyl-alanine-alanine-proline-valine-chloromethyl

The chemokine stromal-derived factor-1 (SDF-1) controls many aspects of stem cell function. Details of its regulation and sites of production are currently unknown. We report that in the bone marrow, SDF-1 is produced mainly by immature osteoblasts and endothelial cells. Conditioning with DNA-damagi …

Transmembrane signaling of the CXC chemokine stromal cell-derived factor-1 (SDF-1) is mediated by CXCR4, a G protein-coupled receptor initially identified in leukocytes and shown to serve as a coreceptor for the entry of HIV into lymphocytes. Characterization of SDF-1- and CXCR4-deficient mice has revealed that SDF-1 and CXCR4 are of vital developmental importance. To study the role of the SDF-1/CXCR4-chemokine/receptor system as a regulator of vertebrate development, we isolated and characterized a cDNA encoding SDF-1 of the lower vertebrate Xenopus laevis (xSDF-1). Recombinant xSDF-1 was produced in insect cells, purified, and functionally characterized. Although xSDF-1 is only 64-66% identical with its mammalian counterparts, it is indistinguishable from human (h)SDF-1alpha in terms of activating both X. laevis CXCR4 and hCXCR4. Thus, both xSDF-1 and hSDF-1alpha promoted CXCR4-mediated activation of heterotrimeric G(i2) in a cell-free system and induced release of intracellular calcium ions ...

Shop Stromal cell-derived factor ELISA Kit, Recombinant Protein and Stromal cell-derived factor Antibody at MyBioSource. Custom ELISA Kit, Recombinant Protein and Antibody are available.

Hematopoietic progenitor cells (HPCs) normally reside in the bone marrow (BM) but can be mobilized into the peripheral blood (PB) after treatment with GCSF or chemotherapy. In previous studies, we showed that granulocyte precursors accumulate in the BM during mobilization induced by either GCSF or cyclophosphamide (CY), leading to the accumulation of active neutrophil proteases in this tissue. We now report that mobilization of HPCs by GCSF coincides in vivo with the cleavage of the N-terminus of the chemokine receptor CXCR4 on HPCs resident in the BM and mobilized into the PB. This cleavage of CXCR4 on mobilized HPCs results in the loss of chemotaxis in response to the CXCR4 ligand, the chemokine stromal cell-derived factor-1 (SDF-1/CXCL12). Furthermore, the concentration of SDF-1 decreased in vivo in the BM of mobilized mice, and this decrease coincided with the accumulation of serine proteases able to directly cleave and inactivate SDF-1. Since both SDF-1 and its receptor, CXCR4, are ...

Particular populations of stem cells in the bone marrow harbors the membrane receptor CXCR4 which is a specific receptor for chemokine stromal cell-derived factor (SDF-1). In addition, the presence of CXCR4 identifies cells showing expression of early cardiac, muscle and endothelial markers. In mice experiments it was shown that bone marrow contains pools of cells that express early cardiac lineage markers (Nkx2.5/Csx, GATA-4, and MEF2C) and the population can be mobilised by inducing the myocardial infarction. This is the first proof that postnatal bone marrow contains nonhematopoietic population of cells that express markers for cardiac differentiation [4-6]. The peak expression of cardiac markers was found at the same time as most significant increase of stem cells number was measured [12]. A Similar phenomenon seems to occur in humans in the setting of AMI [10]. The SDF-1/CXCR-4 axis seems particularly important in stem/progenitor cell homing, chemotaxis, engrafment and retention in ...

During development, Hedgehog (Hh) signaling controls both cell fate and proliferation, but how cells decide whether to divide or differentiate in response to signaling is not clear. Stückemann et al. report that, in the zebrafish gastrula, Hh signaling promoted proliferation of endoderm and inhibited proliferation of nonendodermal cells (mesoderm and ectoderm). Because the chemokine stromal cell-derived factor 1 (SDF-1) has been implicated in Hh-induced proliferation in other cell types, and because the SDF-1-activated G protein-coupled receptor CXCR4a is present in the endoderm, the authors investigated the role of CXCR4a in the context of early endoderm development. Hh signaling is induced when Hh binds to its transmembrane receptor Patched (Ptc), thus relieving Ptc-mediated repression of the transmembrane protein Smoothened (Smo), which initiates intracellular signal transduction. Knocking down Ptc, therefore, activates Hh signaling. In endodermal cells, morpholino-mediated knockdown of ...

Although many regenerative cell therapies are being developed to replace or regenerate ischaemic muscle, the lack of vasculature and poor persistence of the therapeutic cells represent major limiting factors to successful tissue restoration. In response to ischaemia, stromal cell-derived factor-1 (SDF-1) is up-regulated by the affected tissue to stimulate stem cell-mediated regenerative responses. Therefore, we encapsulated SDF-1 into alginate microspheres and further incorporated these into an injectable collagen-based matrix in order to improve local delivery. Microsphere-matrix impregnation reduced the time for matrix thermogelation, and also increased the viscosity reached. This double-incorporation prolonged the release of SDF-1, which maintained adhesive and migratory bioactivity, attributed to chemotaxis in response to SDF-1. In vivo, treatment of ischaemic hindlimb muscle with microsphere-matrix led to increased mobilisation of bone marrow-derived progenitor cells, and also improved ...

Novel Stromal Cell-Derived Factor-1 Polypeptides, Polynucleotides, Modulators Thereof and Methods of Use - diagram, schematic, and image 01 ...

In the adult rodent, stroke induces an increase in endogenous neural progenitor cell (NPC) proliferation in the subventricular zone (SVZ) and neuroblasts migrate towards the ischemic boundary. We investigated the role of stromal cell-derived factor 1alpha (SDF-1alpha) in mediating NPC migration afte …

Polyclonal antibody for GRO alpha/CXCL1 detection. Host: Rabbit.Size: 100μg/vial. Tested applications: WB. Reactive species: Human. GRO alpha/CXCL1 information: Molecular Weight: 11301 MW; Subcellular Localization: Secreted.

UCL Discovery is UCLs open access repository, showcasing and providing access to UCL research outputs from all UCL disciplines.

Recombinant Murine Stromal Cell-Derived Factor-1 alpha (rMu SDF-1 alpha) is a recently discovered protein belonging to the alpha-chemokine (C-X-C) family of cytokines. Creative Bioarrays recombinant murine SDF-1 alpha is a 7.9 kDa protein containing 68 amino acid residues ...

Cxcl12 - Cxcl12 (untagged ORF) - Rat chemokine (C-X-C motif) ligand 12 (stromal cell-derived factor 1) (Cxcl12), transcript variant 3, (10 ug) available for purchase from OriGene - Your Gene Company.

Aiuti, A., Tavian, M., Cipponi, A., Ficara, F., Zappone, E., Hoxie, J., … Bordignon, C. (1999). Expression of CXCR4, the receptor for stromal cell-derived factor-1 on fetal and adult human lympho-hematopoietic progenitors. European Journal of Immunology, 29(6), 1823-1831. https://doi.org/10.1002/(SICI)1521-4141(199906)29:06,1823::AID-IMMU1823,3.0.CO;2- ...

As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.

sdf 1 alpha recombinant human sdf 1 alpha | order sdf 1 alpha recombinant human sdf 1 alpha | How to use: sdf 1 alpha recombinant human sdf 1 alpha | support help for

购买我们的重组人SDF1 alpha蛋白。Ab73461为有活性的全长蛋白，在大肠杆菌中生产并经过Functional Studies实验验证。Abcam提供免费的实验方案，操作技巧及专业的支持。

CXCR4 is the Gi protein-linked seven-transmembrane receptor for the alpha chemokine stromal cell-derived factor 1 (SDF-1), a chemoattractant for lymphocytes. This receptor is highly conserved between human and rodent. CXCR4 is also a coreceptor for entry of human immunodeficiency virus (HIV) in T cells and is expressed in the CNS. To investigate how these CXCR4 ligands influence CNS development and/or function, we have examined the expression and signalling of this chemokine receptor in rat neurons and astrocytes in vitro. CXCR4 transcripts and protein are synthesized by both cell types and in E15 brain neuronal progenitors. In these progenitors, SDF-1, but not gp120 (the HIV glycoprotein), induced activation of extracellular signal regulated kinases (ERKs) 1/2 and a dose-dependent chemotactic response. This chemotaxis was inhibited by Pertussis toxin, which uncouples Gi proteins and the bicyclam AMD3100, a highly selective CXCR4 antagonist, as well as by an inhibitor of the MAP kinase pathway. In

[45 Pages Report] Check for Discount on C-X-C Chemokine Receptor Type 1 (CDw128a or High Affinity Interleukin 8 Receptor A or IL8 Receptor Type 1 or CD181 or CXCR1) - Pipeline Review, H2 2017 report by Global Markets Direct. According to the recently published report C-X-C Chemokine...

C-X-C Chemokine Receptor Type 2 (CDw128b or GRO/MGSA Receptor or High Affinity Interleukin 8 Receptor B or IL8 Receptor Type 2 or CD182 or CXCR2) - Pipeline Review, ...

Oral squamous cell carcinoma (SCC) has a striking tendency to invade to bone. The chemokine stromal cell-derived factor-1 (SDF-1) is constitutively secreted by osteoblasts and plays a key role in homing of hematopoietic cells to the bone marrow. Interleukin (IL)-6 plays an important role in osteoclastogenesis. Herein, we found that SDF-1α increased the secretion of IL-6 in cultured human SCC cells, as shown by reverse transcriptase-polymerase chain reaction and enzyme-linked immunosorbent assay. SDF-1α also increased the surface expression of chemokine receptor 4 (CXCR4) in SCC cells. CXCR4-neutralizing antibody, CXCR4-specific inhibitor (AMD3100) or small interfering RNA against CXCR4 inhibited SDF-1α-induced increase IL-6 production. The transcriptional regulation of IL-6 by SDF-1α was mediated by phosphorylation of extracellular signal-regulated kinases (ERKs) and activation of the nuclear factor-kappa B (NF-κB) components p65 and p50. The binding of p65 and p50 to the NF-κB element on ...

Endothelial progenitor cells (EPCs) play an important role in ischemic stroke. However, there are few studies on the relationship between EPC and nondisabling ischemic cerebrovascular events. Our aim was to investigate the association of EPCs and SDF-1 (serum stromal cell-derived factor-1) with NICE (nondisabling ischemic cerebrovascular events). TIA (transient ischemic attack) and minor stroke patients (153 in total) who had an onset of symptoms within 1 day were consecutively collected. 83 of the patients were categorized into the HR-NICE (high-risk nondisabling ischemic cerebrovascular event) group, and 70 of the patients were in the NHR-NICE (non-high-risk nondisabling ischemic cerebrovascular events) group. Adopted FCM (flow cytometry) was used to measure EPCs, taking double-positive CD34/KDR as EPCs. ELISA was used to measure the concentrations of serum SDF-1 and VEGF (vascular endothelial growth factor). By the sequence of admission time, 15 patients were selected separately from the HR-NICE

Dipeptidyl peptidase-4 inhibitors, such as saxagliptin, have been reported to have beneficial effects on β-cell function, but the specific underlying mechanism remains unclear. Stromal cell-derived factor-1α (SDF-1α), a chemokine produced in multiple organs, has been considered as a crucial regulator in promoting β-cell survival. Here, we speculate that SDF-1α might mediate the effect of saxagliptin on improving β-cell function. After 12-week saxagliptin treatment in high-fat diet/streptozotocin-induced diabetic rats, significant improvement in pancreas insulin secretion capacity evaluated by hyperglycemia clamp and increased β-cell to α-cell areas ratio were observed. Saxagliptin significantly induced β-cell proliferation and upregulated the expression of proliferation-related factors including c-myc and cyclind D1 determined with western blotting from the isolated islets. The expression/activity of DPP-4 was significantly reduced and paralleled with the restoration of SDF-1α levels in the

The protein encoded by this gene is a member of the G-protein-coupled receptor family. This protein is a receptor for interleukin 8 (IL8). It binds to IL8 with high affinity, and transduces the signal through a G-protein activated second messenger system. Knockout studies in mice suggested that this protein inhibits embryonic oligodendrocyte precursor migration in developing spinal cord. This gene, IL8RB, a gene encoding another high affinity IL8 receptor, as well as IL8RBP, a pseudogene of IL8RB, form a gene cluster in a region mapped to chromosome 2q33-q36. [provided by RefSeq, Jul 2008 ...

Primordial germ cells (PGCs) in the zebrafish embryo face a long migration from the point at which they are specified during development to the location of the future gonad, and it takes some precise signaling to get them there. Major guidance cues are provided by the chemokine SDF-1a (stromal-derived factor-1 alpha), which attracts the PGCs by signaling through its receptor CXCR4b [chemokine (C-X-C motif) receptor 4b]. SDF-1a also binds to another receptor, CXCR7, but the function of this receptor in PGC cell migration has been uncertain. Boldajipour et al.s experiments indicate that CXCR7s function is not to signal but rather to act as a sink that soaks up stray molecules of SDF-1a, thus adding to the precision of SDF-1a signaling through CXCR4b. Transplantation experiments taking PGCs from animals lacking CXCR7 into wild-type embryos showed that the critical function of CXCR7 was in somatic cells, not the PGCs. Microscopy of fluorescently tagged proteins showed that CXCR7 promoted ...

Clone REA649 recognizes the human CD184 antigen, a multi-pass membrane protein, also known as C-X-C chemokine receptor type 4 (CXCR4), leukocyte-derived seven transmembrane domain receptor (LESTR), or fusin. CD184 is ubiquitously expressed on blood and tissue cells. It mediates chemotaxis in mature and progenitor blood cells and is important for B lymphopoiesis, myelopoiesis, and cardiogenesis. CD184 exclusively interacts with the endogenous ligand CXCL12. Binding of CXCL12 transduces a signal by increasing intracellular calcium ion levels and enhancing MAPK1/MAPK3 activation. Although CXCL12 is the only known chemokine that binds CD184, recent studies suggest that extracellular ubiquitin also acts as an immune modulator through CD184-mediated signaling. CD184 is a coreceptor for HIV entry by promoting Env-mediated fusion of the virus.Additional information: Clone REA649 displays negligible binding to Fc receptors. | Ísland

Thank you for your interest in spreading the word on Circulation.. NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address. ...

This gene encodes a CXC chemokine receptor specific for stromal cell-derived factor-1. The protein has 7 transmembrane regions and is located on the cell surface. It acts

Stromal cell-derived factor-1 beta (SDF-1 β), also called CXCL12b, is one of two SDF-1 splice variants made by a wide variety of cells upon stimulation by inflammatory cytokines such as TNF, IL-1, and LPS. SDF-1 β signals through the G protein-coupled receptor CXCR4 to recruit activated leukocytes.

Results Mean age was 48.28±3.88 for controls and 49.48±9.88 for patients (p=0.19); 53 controls (95%) and 97 patients (97%) were women (p=0.23). Diastolic dysfunction was present in 1 control (1.7%) and 61 SSc patients (61%) (p=0.0003). NT-proBNP levels were 22.24 pg/ml ±8.48 for controls, 50.51 pg/ml (12-253) for patients without DD and 336.15 pg/ml (17-2250) for patients with DD (p=0.0001). CD309/34+ EPC was 0.84 cels/ml (0.1-3.1) for controls, 1.71 cels/ml (0.1-5.5) for patients without DD and 0.86 cels/ml (0.01-5.5) for patients with DD (p=0.0001); same tendency was observed with other two subtypes of EPC. Subanalysis showed that EPC was different (p=0.0001) among mild, moderate and severe DD. ...

MacArthur, John W. et al Sustained Release of Engineered Stromal Cell-Derived Factor 1-α From Injectable Hydrogels Effectively Recruits Endothelial Progenitor Cells and Preserves Ventricular Function After Myocardial Infarction. Circulation 128.11 suppl 1 (2013): S79-S86. Web. 22 Jan. 2018. ...

Sustained release of engineered stromal cell-derived factor 1-a from injectable hydrogels effectively recruits endothelial progenitor cells and preserves vent

Sel punca kanker inggih punika sèl ingkang ngaktivasi lintasan onkogenik wujud tumorigenesis ingkang damel sèl normal nglampahi fase inisiasi tumor, nanging sèl pucuk kanker boten gadhah sipat namun tumorigenik.[7] saking data pungkasan, dipuntemuake selpuncak kanker ing pinten-pinten jinis kanker seperti leukimia, kanker payudara, kanker utek, kanker utek, kanker usus besar dan kanker kulit. Sel punca kanker pankreas gadhah kluster diferensiasi CD44, CD24 saha epithelial-specific antigen, selain SDF-1 (stromal cell-derived factor 1)/CXCR4 kanggé migrasi kados ta sèl punca normal,[8] sarta èksprèsi genetiklangkung inggal saking lebih tinggi ari sèl punca normal, kados ta gen BMI-1 dan SHH (Sonic hedgehog) kanggé nguwali piyambakipun,,[9] ...

C-X-C Motif Chemokine 2/CXCL2/MIP-2 product information; C-X-C Motif Chemokine 2/CXCL2/MIP-2 is available 1 time from supplier EnoGene at Gentaur.com shop

CD184, also known as CXCR4 or fusin, is a receptor for the C-X-C chemokine SDF-1. It is expressed mainly in hematopoietic cells, vascular endothelium, and neural tissue. CD184 is a G-protein coupled receptor containing extracellular N-terminal, seven transmembrane domains and intracellular C-terminal domain. It transduces signal by increasing the intracellular calcium level. CD184 plays an essential role in vascularization of the gastrointestinal tract, and is involved in cerebellar development and in hematopoiesis. It is also a coreceptor (with CD4) for HIV-1 X4 virus and a primary receptor for some HIV-2 isolates ...

CXCL12 izaziva potentnu hemotaksu limfocita.[4][5][6][7] Tokom embriogeneze on usmerava migraciju hematopoetskih ćelija i formiranje velikih krvnih sudova. Miševi bez CXCL12 gena su letalni pre rođenja, ili u toku prvog sata života. Kod odraslih CXCL12 igra važnu ulogu u angiogenezi putem regrutovanja endotelnih progenitorskih ćelija (EPC) iz koštane srži kroz CXCR4 zavistan mehanizam.[8] Ova funkcija čini CXCL12 veoma važnim faktorom u karcinogenezi i neovaskularizaciji vezanoj za progresiju tumora.[9] CXCL12 takođe ima ulogu u metastazi tumora gde su ćelije raka koje izražavaju CXCR4 receptor privučene ka metastaznim ciljnim tkivima koja oslobađaju ligand, CXCL12.[10] Kod raka dojke, međutim, povećano CXCL12 izražavanje određuje umanjeni rizik od metastaze.[11][12] ...

The experiments described in this study suggest that the chemokine SDF-1 acts as a neurotransmitter in the DG. The evidence supporting this supposition is similar to that available for GABA, certainly a well-established neurotransmitter. Thus, both GABA and SDF-1 are localized in synaptic vesicles within DG nerve terminals. Both GABA and SDF-1 produce similar electrophysiological effects on nestin-EGFP and DCX-EGFP-expressing cells in the SGZ. Moreover, it appears that both GABA and SDF-1 are tonically released in the DG. Thus, addition of both GABAA and CXCR4 receptor blockers elicited an outward current, suggesting that GABA and SDF-1 normally exert a tonic influence on type 2 progenitor cells. It also appears that the effects of GABA and SDF-1 are linked in some way because the observed effects of SDF-1 are sensitive to both GABAA and CXCR4 blockers.. SDF-1 and its receptor CXCR4 have been shown to be widely expressed throughout the developing and adult nervous systems (Stumm et al., 2002; ...

This antimicrobial gene encodes a chemokine of the CXC subfamily and ligand for the receptor CXCR3. Binding of this protein to CXCR3 results in pleiotropic effects, including stimulation of monocytes, natural killer and T-cell migration, and modulation of adhesion molecule expression. This gene may also be a key regulator of the cytokine storm immune response to SARS-CoV-2 infection. [provided by RefSeq, Sep 2020 ...

Complete information for CXCL9 gene (Protein Coding), C-X-C Motif Chemokine Ligand 9, including: function, proteins, disorders, pathways, orthologs, and expression. GeneCards - The Human Gene Compendium

Russell Healths Stem Cell Recruitment Therapy products are exempt from FDA pre-market review, clearance, and approval from the FDA. Learn more!

Aortic and plasma expression levels of IL-18 and CXCL16.(A) Reduced aortic mRNA expression of IL-18 and CXCL16, but no change in the expression of IFN-γ is obs

The aim of the present study was to characterize the defect in chemokine-induced αLβ2 activation that we have previously identified in α4β1+ CLL cells ( 3, 4).. Because many CLL clones express little or no α4β1 ( 3, 5), we started the present studies by examining chemokine-induced αLβ2 clustering on these cells. The αL of α4− CLL cells also failed to undergo polar clustering or αLβ2-dependent motility when incubated on ligand in the presence of chemokine. Because the αLβ2 of normal B cells becomes clustered under these conditions ( 4), this indicates that defective αL clustering in response to chemokine is a feature of CLL cells, regardless of their expression of α4β1.. We next found that the αLβ2 of CLL cells tested directly ex vivo is in an activated conformation, but the degree of activation varied among cases, with α4− clones expressing the high-affinity, fully activated form of αLβ2; furthermore, these cells were able to bind ICAM-1. In contrast, α4β1+ cells ...

TY - JOUR. T1 - The role of metabotropic glutamate receptor 5 on the stromal cell-derived factor-1/CXCR4 system in oral. AU - Kuribayashi, Nobuyuki. AU - Uchida, Daisuke. AU - Kinouchi, Makoto. AU - Takamaru, Natsumi. AU - Tamatani, Tetsuya. AU - Nagai, Hirokazu. AU - Miyamoto, Youji. PY - 2013/11/13. Y1 - 2013/11/13. N2 - We have demonstrated that blocking CXCR4 may be a potent anti-metastatic therapy for CXCR4-related oral cancer. However, as CXCR4 antagonists are currently in clinical use to induce the mobilization of hematopoietic stem cells, continuous administration as an inhibitor for the metastasis may lead to persistent leukocytosis. In this study, we investigated the novel therapeutic downstream target(s) of the SDF-1/CXCR4 system, using B88-SDF-1 cells, which have an autocrine SDF-1/CXCR4 system and exhibit distant metastatic potential in vivo. Microarray analysis revealed that 418 genes were upregulated in B88-SDF-1 cells. We identified a gene that is highly upregulated in B88-SDF-1 ...

Hypoxia is known to regulate the expression of genes involved in the migration of various cell types. Although many studies have shown that hypoxia increases cell migration, it still remains unclear whether hypoxia could modulate the stromal cell derived factor-1 (SDF-1)-dependent migration of leukemic cell. Herein, we demonstrated that the SDF-1-dependent migration of HL-60, was reduced under hypoxia with no comparable decrease of CXC-type chemokine receptor CXCR4, a cognate receptor for SDF-1. Furthermore, we showed that migration toward SDF-1 was reduced by inactivation of either serine/threonine kinase Akt or extracellular signal regulated kinase Erk, which was confirmed by selective pathway inhibitor LY294002 and PD98059. In our results, phosphorylation of Erk was increased under hypoxia, but phosphorylation of Akt was attenuated on the contrary. These results led us to conclusion that hypoxia could inhibit the SDF-1-dependent migration of HL-60 via blocking of Akt activation ...

Chemokines mediate diverse fundamental biological processes, including combating infection. Multiple chemokines are expressed at the site of infection; thus chemokine synergy by heterodimer formation may play a role in determining function. Chemokine function involves interactions with G-protein-coupled receptors and sulfated glycosaminoglycans (GAG). However, very little is known regarding heterodimer structural features and receptor and GAG interactions. Solution nuclear magnetic resonance (NMR) and molecular dynamics characterization of platelet-derived chemokine CXCL7 heterodimerization with chemokines CXCL1, CXCL4, and CXCL8 indicated that packing interactions promote CXCL7-CXCL1 and CXCL7-CXCL4 heterodimers, and electrostatic repulsive interactions disfavor the CXCL7-CXCL8 heterodimer. As characterizing the native heterodimer is challenging due to interference from monomers and homodimers, we engineered a

Oregon Grape, a popular source of Berberine. SDF-1 binds to a receptor named CXCR-4 (short for C-X-C chemokine receptor type 4. SDF-1 is sometimes referred to as CXCL12, thats where the CXC comes from, but lets try to keep this simple).. Leukemia tumor cells express this CXCR-4 receptor either on their surface or inside the cell. They notice and respond to SDF-1. This cSFD-1/CXCR4 signaling pathway involved in the migration of leukemic cells though the body. A 2008 paper by Li et al reported that because berberine … could partly inhibit SDF-1 induced AML [acute myeloid leukemia] cells as well as LSCs [leukemic stem cells] migration…… [the authors] hypothesized that berberine could inhibit AML cells migration partly by reducing the secreting of SDF-1 …... Therefore, [they] speculated that berberine might be a potentially effective agent for prevention of leukemia. [1] This hypothesis was based in part by an earlier paper by Tavor et al that looked at the role of CXCR4 in the ...

Proangiogenic factors, vascular endothelial growth factor (VEGF), and fibroblast growth factor-2 (FGF-2) prime endothelial cells to respond to hematopoietic chemokines and cytokines by inducing/upregulating expression of the respective chemokine/cytokine receptors. Coculture of human endothelial colony forming cell (ECFC)-derived cells with human stromal cells in the presence of VEGF and FGF-2 for 14 days resulted in upregulation of the hematopoietic chemokine CXCL12 and its CXCR4 receptor by day 3 of coculture. Chronic exposure to the CXCR4 antagonist AMD3100 in this vasculo/angiogenesis assay significantly reduced vascular tubule formation, an observation recapitulated by delayed AMD3100 addition. While AMD3100 did not affect ECFC-derived cell proliferation, it did demonstrate a dual action. First, over the later stages of the 14-day cocultures, AMD3100 delayed tubule organization into maturing vessel networks, resulting in enhanced endothelial cell retraction and loss of complexity as defined by

Although ovarian cancer is rare, it is the most deadly of gynaecological cancers. Unfortunately, still very little is known about the cells that give rise to 90% of ovarian cancers, the ovarian surface epithelial (OSE) cells, and much of the available data remains controversial. This project was designed to address the possible involvement of ovarian stromal/thecal cells in the regulation of OSE cell growth and Kit and KL expression. Such interactions are probably involved in normal OSE-stromal/thecal cell activities as well as in interactions occurring within inclusion cysts and leading to ovarian tumour formation. The regulation of rat OSE (ROSE) cell growth by theca-derived factors and gonadotropins was investigated by proliferation experiments and cell counts. The modulation of Kit and Kit ligand (KL) messenger ribonucleic acid (mRNA) expression in these cells by the same factors was investigated by Northern blot analysis and reverse transcription-polymerase chain reaction (RT-PCR). ...

Background: Metastasis, the spread and growth of tumor cells to distant organ sites, represents the most devastating attribute and plays a major role in the morbidity and mortality of cancer. Inflammation is crucial for malignant tumor transformation and survival. Thus, blocking inflammation is expected to serve as an effective cancer treatment. Among anti-inflammation therapies, chemokine modulation is now beginning to emerge from the pipeline. CXC chemokine receptor-4 (CXCR4) and its ligand stromal cell-derived factor-1 (CXCL12) interaction and the resulting cell signaling cascade have emerged as highly relevant targets since they play pleiotropic roles in metastatic progression. The unique function of CXCR4 is to promote the homing of tumor cells to their microenvironment at the distant organ sites. Methodology/Principal Findings: We describe the actions of N,N-(1,4-phenylenebis(methylene))dipyrimidin-2-amine (designated MSX-122), a novel small molecule and partial CXCR4 antagonist with ...

Cxcl12 - Cxcl12 (Myc-DDK-tagged ORF) - Rat chemokine (C-X-C motif) ligand 12 (stromal cell-derived factor 1) (Cxcl12), transcript variant 2, (10 ug) available for purchase from OriGene - Your Gene Company.

PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.

Hypoxia inducible factor-1α (HIF-1α) is an important transcription factor, which plays a critical role in the formation of solid tumor and its microenviroment. The objective of the present study was to evaluate the expression and function of HIF-1α in human leukemia bone marrow stromal cells (BMSCs) and to identify the downstream targets of HIF-1α. HIF-1α expression was detected at both the RNA and protein levels using real-time PCR and immunohistochemistry, respectively. Vascular endothelial growth factor (VEGF) and stromal cell-derived factor-1α (SDF-1α) were detected in stromal cells by enzyme-linked immunosorbent assay. HIF-1α was blocked by constructing the lentiviral RNAi vector system and infecting the BMSCs. The Jurkat cell/BMSC co-cultured system ...

Beyond the influences of other cytokines on EPO effects, new and surprising information on EPO should also be taken into consideration. For example, the enzyme DPP4 (CD26), which is present on the surface of many cell types and in soluble form in the circulation, truncates chemokines such as stromal cell-derived factor-1 (SDF-1/CXCL12), and changes their biological activity (Christopherson et al., 2002, 2004). DPP4 has similar effects on several CSFs, including EPO, truncating the protein at the N terminus-penultimate alanine or proline. Unlike full-length SDF-1, DPP4-truncated SDF-1 is inactive as a chemotactic molecule and survival factor in vitro (Christopherson et al., 2002; Broxmeyer et al., 2012) and as a homing molecule in vivo (Christopherson et al., 2004), and can block the activity of full-length SDF-1. These effects are counteracted by inhibition of DPP4 by specific peptides (Diprotin A [ILE-PRO-ILE] or Val-Pyr) or a small molecule (sitagliptin). Similarly, DPP4 truncates EPO into a ...

In this study, we show that the chemokine SDF-1 and its cognate receptor CXCR4 are expressed in breast cancer in vivo and analyze the effects of manipulating these proteins in a coculture model of mammary carcinoma and vascular endothelial cells. The evidence presented suggests that activation of the SDF-1/CXCR4 axis in a growing tumor contributes to angiogenesis and the initial steps of metastasis. CXCR4 activation had surprisingly similar effects on tumor and endothelial cells: it induced proliferation and migration. In addition, SDF-1 binding to CXCR4 led to specific effects on endothelial and tumor cells: in endothelial cells, CXCR4 stimulated tube formation which may point to proangiogenic activity in vivo, whereas in the tumor cells activation of this receptor resulted in adhesion to endothelial cells and transendothelial migration.. In addition to their hematopoietic activities, SDF-1 and CXCR4 have been implicated in the regulation of angiogenesis in a number of (patho)physiological ...

CXCL12 izaziva potentnu hemotaksu limfocita.[4][5][6][7] Tokom embriogeneze on usmerava migraciju hematopoetskih ćelija i formiranje velikih krvnih sudova. Miševi bez CXCL12 gena su letalni pre rođenja, ili u toku prvog sata života. Kod odraslih CXCL12 igra važnu ulogu u angiogenezi putem regrutovanja endotelnih progenitorskih ćelija (EPC) iz koštane srži kroz CXCR4 zavistan mehanizam.[8] Ova funkcija čini CXCL12 veoma važnim faktorom u karcinogenezi i neovaskularizaciji vezanoj za progresiju tumora.[9] CXCL12 takođe ima ulogu u metastazi tumora gde su ćelije raka koje izražavaju CXCR4 receptor privučene ka metastaznim ciljnim tkivima koja oslobađaju ligand, CXCL12.[10] Kod raka dojke, međutim, povećano CXCL12 izražavanje određuje umanjeni rizik od metastaze.[11][12] ...

Therapies based on circulating proangiogenic cells (PACs) have shown promise in ischemic disease models but require further optimization to reach the bedside. Ischemia-associated hypoxia robustly increases microRNA-210 (miR-210) expression in several cell types, including endothelial cells (ECs). In ECs, miR-210 represses EphrinA3 (EFNA3), inducing proangiogenic responses. This study provides new mechanistic evidences for a role of miR-210 in PACs. PACs were obtained from either adult peripheral blood or cord blood. miR-210 expression was modulated with either an inhibitory complementary oligonucleotide (anti-miR-210) or a miRNA mimic (pre-miR-210). Scramble and absence of transfection served as controls. As expected, hypoxia increased miR-210 in PACs. In vivo, migration toward and adhesion to the ischemic endothelium facilitate the proangiogenic actions of transplanted PACs. In vitro, PAC migration toward SDF-1α/CXCL12 was impaired by anti-miR-210 and enhanced by pre-miR-210. Moreover, ...

CXCL10 (chemokine (C-X-C motif) ligand 10), Authors: Frank Antonicelli, Philippe Bernard. Published in: Atlas Genet Cytogenet Oncol Haematol.

CXCL16 is a member of the CXC chemokine family and signals through the CXCR6 receptor. CXCL16 may play a role in attracting lymphocyte subsets

Human C-X-C Motif Chemokine 9 / Monokine Induced by Gamma Interferon (CXCL9 / MIG) standard, for use in running standard curves in AlphaLISA no-wash detection assay

Recombinant Human IP-10/CXCL10 produced inE. coliis a single, non-glycosylated polypeptide chain containing 77 amino acids and having a molecular mass of 8.5 kDa.

Human IL-8/CXCL8 HEK293 Cells Overexpression Lysate 10098-HNCH1L is validated in western blot (WB) as positive control. Sino Biological offers bulk order for high quality cell lysates which are produced in house.

References for Abcams Recombinant human CXCL5 protein (ab50039). Please let us know if you have used this product in your publication

References for Abcams Recombinant Mouse CXCL5 protein (ab57029). Please let us know if you have used this product in your publication

Scottish Drugs Forum (SDF) is a company limited by guarantee, registration no. 106295 with charitable status and is also a registered Scottish charity, registered SC 008075. ...

Scottish Drugs Forum (SDF) is a company limited by guarantee, registration no. 106295 with charitable status and is also a registered Scottish charity, registered SC 008075. ...