ElastinTropoelastin: A salt-soluble precursor of elastin. Lysyl oxidase is instrumental in converting it to elastin in connective tissue.Desmosine: A rare amino acid found in elastin, formed by condensation of four molecules of lysine into a pyridinium ring.Elastic Tissue: Connective tissue comprised chiefly of elastic fibers. Elastic fibers have two components: ELASTIN and MICROFIBRILS.Isodesmosine: 2-(4-Amino-4-carboxybutyl)-1-(5-amino-5-carboxypentyl)-3,5-bis(3-amino-3-carboxypropyl)pyridinium. A rare amino acid found in elastin, formed by condensation of four molecules of lysine into a pyridinium ring.Pancreatic Elastase: A protease of broad specificity, obtained from dried pancreas. Molecular weight is approximately 25,000. The enzyme breaks down elastin, the specific protein of elastic fibers, and digests other proteins such as fibrin, hemoglobin, and albumin. EC 6-Oxidase: An enzyme oxidizing peptidyl-lysyl-peptide in the presence of water & molecular oxygen to yield peptidyl-allysyl-peptide plus ammonia & hydrogen peroxide. EC Shiny, flexible bands of fibrous tissue connecting together articular extremities of bones. They are pliant, tough, and inextensile.Collagen: A polypeptide substance comprising about one third of the total protein in mammalian organisms. It is the main constituent of SKIN; CONNECTIVE TISSUE; and the organic substance of bones (BONE AND BONES) and teeth (TOOTH).Aortic Stenosis, Supravalvular: A pathological constriction occurring in the region above the AORTIC VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.Cutis Laxa: A group of connective tissue diseases in which skin hangs in loose pendulous folds. It is believed to be associated with decreased elastic tissue formation as well as an abnormality in elastin formation. Cutis laxa is usually a genetic disease, but acquired cases have been reported. (From Dorland, 27th ed)Aorta: The main trunk of the systemic arteries.Matrix Metalloproteinase 12: A secreted matrix metalloproteinase which is highly expressed by MACROPHAGES where it may play a role in INFLAMMATION and WOUND HEALING.Williams Syndrome: A disorder caused by hemizygous microdeletion of about 28 genes on chromosome 7q11.23, including the ELASTIN gene. Clinical manifestations include SUPRAVALVULAR AORTIC STENOSIS; MENTAL RETARDATION; elfin facies; impaired visuospatial constructive abilities; and transient HYPERCALCEMIA in infancy. The condition affects both sexes, with onset at birth or in early infancy.Elasticity: Resistance and recovery from distortion of shape.Connective Tissue: Tissue that supports and binds other tissues. It consists of CONNECTIVE TISSUE CELLS embedded in a large amount of EXTRACELLULAR MATRIX.Extracellular Matrix: A meshwork-like substance found within the extracellular space and in association with the basement membrane of the cell surface. It promotes cellular proliferation and provides a supporting structure to which cells or cell lysates in culture dishes adhere.Aminopropionitrile: Reagent used as an intermediate in the manufacture of beta-alanine and pantothenic acid.Microfibrils: Components of the extracellular matrix consisting primarily of fibrillin. They are essential for the integrity of elastic fibers.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Exons: The parts of a transcript of a split GENE remaining after the INTRONS are removed. They are spliced together to become a MESSENGER RNA or other functional RNA.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.Amino Acid Sequence: The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.Protein Conformation: The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).Dictionaries, ChemicalAgrochemicals: Chemicals used in agriculture. These include pesticides, fumigants, fertilizers, plant hormones, steroids, antibiotics, mycotoxins, etc.Dictionaries, MedicalDictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Biopharmaceutics: The study of the physical and chemical properties of a drug and its dosage form as related to the onset, duration, and intensity of its action.Pharmaceutical Preparations: Drugs intended for human or veterinary use, presented in their finished dosage form. Included here are materials used in the preparation and/or formulation of the finished dosage form.Leukocyte Elastase: An enzyme that catalyzes the hydrolysis of proteins, including elastin. It cleaves preferentially bonds at the carboxyl side of Ala and Val, with greater specificity for Ala. EC Organizations established by endowments with provision for future maintenance.Bacteriology: The study of the structure, growth, function, genetics, and reproduction of bacteria, and BACTERIAL INFECTIONS.Nobel PrizeEctromelia: Gross hypo- or aplasia of one or more long bones of one or more limbs. The concept includes amelia, hemimelia, phocomelia, and sirenomelia.Biotechnology: Body of knowledge related to the use of organisms, cells or cell-derived constituents for the purpose of developing products which are technically, scientifically and clinically useful. Alteration of biologic function at the molecular level (i.e., GENETIC ENGINEERING) is a central focus; laboratory methods used include TRANSFECTION and CLONING technologies, sequence and structure analysis algorithms, computer databases, and gene and protein structure function analysis and prediction.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Health Facility Merger: The combining of administrative and organizational resources of two or more health care facilities.Library Services: Services offered to the library user. They include reference and circulation.Archaeology: The scientific study of past societies through artifacts, fossils, etc.Facial DermatosesGalectins: A class of animal lectins that bind specifically to beta-galactoside in a calcium-independent manner. Members of this class are distiguished from other lectins by the presence of a conserved carbohydrate recognition domain. The majority of proteins in this class bind to sugar molecules in a sulfhydryl-dependent manner and are often referred to as S-type lectins, however this property is not required for membership in this class.Galactosides: Glycosides formed by the reaction of the hydroxyl group on the anomeric carbon atom of galactose with an alcohol to form an acetal. They include both alpha- and beta-galactosides.Galectin 1: A galectin found abundantly in smooth muscle (MUSCLE, SMOOTH) and SKELETAL MUSCLE and many other tissues. It occurs as a homodimer with two 14-kDa subunits.Counterfeit Drugs: Drugs manufactured and sold with the intent to misrepresent its origin, authenticity, chemical composition, and or efficacy. Counterfeit drugs may contain inappropriate quantities of ingredients not listed on the label or package. In order to further deceive the consumer, the packaging, container, or labeling, may be inaccurate, incorrect, or fake.Surgical Tape: A flat, flexible strip of material used to cover or fasten together damaged tissue.Fraud: Exploitation through misrepresentation of the facts or concealment of the purposes of the exploiter.Sports Medicine: The field of medicine concerned with physical fitness and the diagnosis and treatment of injuries sustained in exercise and sports activities.Doping in Sports: Illegitimate use of substances for a desired effect in competitive sports. It includes humans and animals.Athletic Tape: Adhesive tape with the mechanical strength to resist stretching. It is applied to the skin to support, stabilize, and restrict movement to aid healing and/or prevent injuries of MUSCULOSKELETAL SYSTEM.Manufactured Materials: Substances and materials manufactured for use in various technologies and industries and for domestic use.Cosmetics: Substances intended to be applied to the human body for cleansing, beautifying, promoting attractiveness, or altering the appearance without affecting the body's structure or functions. Included in this definition are skin creams, lotions, perfumes, lipsticks, fingernail polishes, eye and facial makeup preparations, permanent waves, hair colors, toothpastes, and deodorants, as well as any material intended for use as a component of a cosmetic product. (U.S. Food & Drug Administration Center for Food Safety & Applied Nutrition Office of Cosmetics Fact Sheet (web page) Feb 1995)Facility Regulation and Control: Formal voluntary or governmental procedures and standards required of hospitals and health or other facilities to improve operating efficiency, and for the protection of the consumer.United States Food and Drug Administration: An agency of the PUBLIC HEALTH SERVICE concerned with the overall planning, promoting, and administering of programs pertaining to maintaining standards of quality of foods, drugs, therapeutic devices, etc.Investigational New Drug Application: An application that must be submitted to a regulatory agency (the FDA in the United States) before a drug can be studied in humans. This application includes results of previous experiments; how, where, and by whom the new studies will be conducted; the chemical structure of the compound; how it is thought to work in the body; any toxic effects found in animal studies; and how the compound is manufactured. (From the "New Medicines in Development" Series produced by the Pharmaceutical Manufacturers Association and published irregularly.)Drug Industry: That segment of commercial enterprise devoted to the design, development, and manufacture of chemical products for use in the diagnosis and treatment of disease, disability, or other dysfunction, or to improve function.

Repopulation of different layers of host human Bruch's membrane by retinal pigment epithelial cell grafts. (1/1299)

PURPOSE: To determine the morphology of human retinal pigment epithelium (RPE) after reattachment to different ultrastructural layers of human Bruch's membrane (BM). METHODS: Bruch's membrane explants were prepared from eyes of 23 human donors (age range, 11-89 years). The basal lamina of the RPE, inner collagenous layer, and elastin layer were removed sequentially by mechanical and enzymatic techniques. First-passage cells of human RPE (15,000 cells/6 mm explant) from three donors (ages, 52, 64, and 80 years) were plated onto different layers of human BM, and the explants were examined by scanning and transmission electron microscopy up to 21 days later. RESULTS: RPE flattened and extended footplates 6 hours after plating onto basal lamina. Cells remained round 6 and 24 hours after plating onto the inner collagenous, elastin, or outer collagenous layer. The RPE cells became confluent 14 days after plating onto basal lamina but did not become confluent up to 21 days after plating onto the inner collagenous or elastin layer. Sparse round cells were observed 21 days after plating onto deeper layers, suggesting extensive loss of RPE. CONCLUSIONS: The morphology and subsequent behavior of the RPE reattached to BM depends on the anatomic layer of BM available for cell reattachment. The results suggest that the ability of transplanted RPE to repopulate BM in age-related macular degeneration and other disorders may depend on the layer of BM available to serve as a substrate for cell reattachment.  (+info)

Suppression of experimental abdominal aortic aneurysms by systemic treatment with a hydroxamate-based matrix metalloproteinase inhibitor (RS 132908). (2/1299)

BACKGROUND: Abdominal aortic aneurysms (AAAs) are associated with chronic inflammation, disruption of medial elastin, and increased local production of elastolytic matrix metalloproteinases (MMPs). The purpose of this study was to investigate how treatment with a hydroxamate-based MMP antagonist (RS 132908) might affect the development of experimental AAAs. METHODS: Male Wistar rats underwent intraluminal perfusion of the abdominal aorta with 50 units of porcine pancreatic elastase followed by treatment for 14 days with RS 132908 (100 mg/kg/day subcutaneously; n = 8) or with vehicle alone (n = 6). The external aortic diameter (AD) was measured in millimeters before elastase perfusion and at death, with AAA defined as an increase in AD (DeltaAD) of at least 100%. Aortic wall elastin and collagen concentrations were measured with assays for desmosine and hydroxyproline, and fixed aortic tissues were examined by light microscopy. RESULTS: AAAs developed in all vehicle-treated rats, with a mean AD (+/- SE) that increased from 1.60 +/- 0.03 mm before perfusion to 5.98 +/- 1.02 mm on day 14 (DeltaAD = 276.4 +/- 67.7%). AAAs developed in only five of eight animals (62.5%) after MMP inhibition, with a mean AD that increased from 1.56 +/- 0.05 mm to 3.59 +/- 0.34 mm (DeltaAD = 128.1 +/- 18.7%; P <.05, vs vehicle). The overall inhibition of aortic dilatation attributable to RS 132908 was 53.6 +/- 6.8%. Aortic wall desmosine fell by 85.4% in the vehicle-treated rats (1210.6 +/- 87.8 pmol/sample to 176.7 +/- 33.4 pmol/sample; P <.05) but only by 65.6% in the animals treated with RS 312908 (416.2 +/- 120.5 pmol/sample). In contrast, hydroxyproline was not significantly affected by either elastase perfusion or drug treatment. Microscopic examination revealed the preservation of pericellular elastin and a greater degree of fibrocollagenous wall thickening after MMP inhibition, with no detectable difference in the extent of inflammation. CONCLUSIONS: Systemic MMP inhibition suppresses aneurysmal dilatation in the elastase-induced rodent model of AAA. Consistent with its direct inhibitory effect on various MMPs, RS 132908 promotes the preservation of aortic elastin and appears to enhance a profibrotic response within the aortic wall. Hydroxamate-based MMP antagonists may therefore be useful in the development of pharmacologic approaches to the suppression of AAAs.  (+info)

Connective tissues: matrix composition and its relevance to physical therapy. (3/1299)

In the last 2 decades, the understanding of CT structure and function has increased enormously. It is now clear that the cells of the various CTs synthesize a variety of ECM components that act not only to underpin the specific biomechanical and functional properties of tissues, but also to regulate a variety of cellular functions. Importantly for the physical therapist, and as discussed above, CTs are responsive to changes in the mechanical environment, both naturally occurring and applied. The relative proportions of collagens and PGs largely determine the mechanical properties of CTs. The relationship between the fibril-forming collagens and PG concentration is reciprocal. Connective tissues designed to resist high tensile forces are high in collagen and low in total PG content (mostly dermatan sulphate PGs), whereas CTs subjected to compressive forces have a greater PG content (mostly chondroitin sulphate PGs). Hyaluronan has multiple roles and not only provides tissue hydration and facilitation of gliding and sliding movements but also forms an integral component of large PG aggregates in pressure-resisting tissues. The smaller glycoproteins help to stabilize and link collagens and PGs to the cell surface. The result is a complex interacting network of matrix molecules, which determines both the mechanical properties and the metabolic responses of tissues. Patients with CT problems affecting movement are frequently examined and treated by physical therapists. A knowledge of the CT matrix composition and its relationship to the biomechanical properties of these tissues, particularly the predictable responses to changing mechanical forces, offers an opportunity to provide a rational basis for treatments. The complexity of the interplay among the components, however, requires that further research be undertaken to determine more precisely the effects of treatments on the structure and function of CTs.  (+info)

Interaction between leukocyte elastase and elastin: quantitative and catalytic analyses. (4/1299)

Solubilization of elastin by human leukocyte elastase (HLE) cannot be analyzed by conventional kinetic methods because the biologically relevant substrate is insoluble and the concentration of enzyme-substrate complex has no physical meaning. We now report quantitative measurements of the binding and catalytic interaction between HLE and elastin permitted by analogy to receptor-ligand systems. Our results indicated that a limited and relatively constant number of enzyme binding sites were available on elastin, and that new sites became accessible as catalysis proceeded. The activation energies and solvent deuterium isotope effects were similar for catalysis of elastin and a soluble peptide substrate by HLE, yet the turnover number for HLE digestion of elastin was 200-2000-fold lower than that of HLE acting on soluble peptide substrates. Analysis of the binding of HLE to elastin at 0 degrees C, in the absence of significant catalytic activity, demonstrated two classes of binding sites (Kd=9.3x10(-9) M and 2.5x10(-7) M). The higher affinity sites accounted for only 6% of the total HLE binding capacity, but essentially all of the catalytic activity, and dissociation of HLE from these sites was minimal. Our studies suggest that interaction of HLE with elastin in vivo may be very persistent and permit progressive solubilization of this structurally important extracellular matrix component.  (+info)

UVB irradiation stimulates deposition of new elastic fibers by modified epithelial cells surrounding the hair follicles and sebaceous glands in mice. (5/1299)

UVB irradiation stimulates the synthesis of elastin in the skin of humans and experimental animals. In this study we localized the site and the cells that are responsible for the synthesis of murine dermal elastic fibers. SKH-1 hairless mice were irradiated with UVB and the skin removed for light microscopy, electron microscopy, in situ hybridization, immunohistochemistry, and biochemical studies. In response to chronic low doses of UVB there was an initial moderate increase in tropoelastin mRNA in the papillary dermis. By contrast, there was a continuous marked elevation of collagen alpha1(I) message localizing to sites of inflammatory cell influx throughout the upper and lower dermis. After 25 wk of UV irradiation there was a 2-fold increase in skin elastin, yet total collagen remained unchanged. Serial desmosine analysis from en face sections indicated the increase in elastin content was due to dermal elastic fibers, an increase in the size and number of the dermal cysts, and an increase in subpanniculus elastic fibers. Elastin stains of en face sections suggested that the elastic fibers in the upper dermis were exclusively derived from cells lining the epithelial root sheath and sebaceous glands. In response to UV irradiation, the elastic fibers increased in number and size, wrapping around these structures and aligning in both directions as long fibers parallel to the body axis. Electron micrographs indicated that modified epithelial cells in close proximity to the flattened epithelial cells that encircled the root sheath and sebaceous glands were the source of the elastic fibers.  (+info)

Targeted overexpression of elafin protects mice against cardiac dysfunction and mortality following viral myocarditis. (6/1299)

Serine elastases degrade elastin, stimulate vascular smooth muscle cell migration and proliferation, and are associated with myocardial damage. To evaluate the impact of elastase inhibition on cardiovascular development and disease, transgenic mice were created in which the mouse preproendothelin-1 promoter was used to target elafin overexpression to the cardiovascular system. To distinguish the transgene from endogenous elafin, constructs were made incorporating a FLAG sequence; the COOH-terminus FLAG-tagged elafin construct produced a stable, functionally active gene product and was used to create transgenic mice. Consistent with endothelin expression, abundant elafin mRNA was observed in transgenic F1 embryos (embryonic day 13.5) and in adult transgenic mice heart, trachea, aorta, kidney, lung, and skin, but not in liver, spleen, and intestine. Functional activity of the transgene was confirmed by heightened myocardial elastase inhibitory activity. No tissue abnormalities were detected by light microscopy or elastin content. However, injection of 10 plaque-forming units (PFU) of encephalomyocarditis virus resulted in death within 11 days in 10 out of 12 nontransgenic mice compared with one out of nine transgenic littermates. This reduced mortality was associated with better cardiac function and less myocardial inflammatory damage. Thus, elafin expression may confer a protective advantage in myocarditis and other inflammatory diseases.  (+info)

The smooth muscle cell. III. Elastin synthesis in arterial smooth muscle cell culture. (7/1299)

Primate arterial smooth muscle cells and skin fibroblasts were examined for their ability to synthesize elastin in culture. In the presence of the lathyrogen beta-aminopropionitrile, the smooth muscle cells incorporate [3H]lysine into a lysyl oxidase substrate that was present in the medium and associated with the cell layer. A component having a mol wt of 72,000 and an electrophoretic mobility similar to that of authentic tropoelastin was isolated from the labeled smooth muscle cells by coacervation and fractionation with organic solvents. In the absence of beta-aminopropionitrile, long-term cultures of smooth muscle cells incorporated [14C]lysine into desmosine and isodesmosine, the cross-link amino acids unique to elastin. In contrast, no desmosine formation occurred in the fibroblast cultures. These characteristics demonstrate that arterial smooth muscle cells are capable of synthesizing both soluble and cross-lined elastin in culture.  (+info)

Identification of a large region of secondary structure in the 3'-untranslated region of chicken elastin mRNA with implications for the regulation of mRNA stability. (8/1299)

Synthesis of aortic elastin peaks in the perinatal period and then is strongly down-regulated with postnatal vascular development. Our laboratory has previously shown that changes in elastin mRNA stability contribute to this developmental decrease in elastin production. Here we identify a large region of stable secondary structure in the 3'-untranslated region (3'-UTR) of chicken elastin mRNA. Reverse transcriptase polymerase chain reaction or polymerase chain reaction amplification of the 3'-UTR consistently resulted in products with an approximately 328-bp deletion from the central region of the 3'-UTR, suggesting the presence of secondary structure. The presence of this structure was confirmed by probing the 3'-UTR with RNases with selectivity for single- or double-stranded RNA. Gel migration shift assays using cytosolic extracts from 2-day old chicken aorta demonstrate specific binding of a cytosolic protein to riboprobes containing the 3'-UTR of elastin but not to riboprobes either corresponding to other areas of the message or containing the 3'-UTR but lacking the region of secondary structure. Binding of cytosolic protein was particularly prominent in aortic extracts from 2-day old chickens, a time when elastin message is stable, as compared with 8- and 15-week old chickens, when the elastin message is relatively unstable, suggesting that this region of secondary structure may play a role in developmental regulation of stability of elastin mRNA.  (+info)

  • The level of neutrophil elastase was higher in asymptomatic current smokers with emphysematous changes on computed tomographic scans than in current smokers without emphysematous changes, and was found to be correlated with the level of elastin-derived peptides in BAL fluid. (elsevier.com)
  • Gjenoppdag hudens ungdommelige kapasitet med BAKEL Elastin Elasticising Face Serum , et antialdringsserum som har en oppstrammende virkning på ansiktshud. (lookfantastic.com)
  • Reported methods for the assembly of different supramolecular structures often involve amphiphilic proteins such as temperature sensitive elastin-like proteins (ELP) 5 , 8 , 9 , recombinant oleosin 10 and artificial protein amphiphiles 11 . (jove.com)
  • The Elastin Sports Tape is constructed from a combination of a special cotton fibres and mucus coating which allows adhesive. (fuzing.com)
  • Matrix elastin: a promising biomarker for chronic obstructive pulmonary disease. (unipv.it)
  • This perspective brings together the laboratory and clinical evidence, which suggest that elastin degradation products can fulfill the need for such a biomarker. (unipv.it)
  • Elastin is the amorphous component of these complex biopolymers and is an insoluble, highly cross-linked, hydrophobic protein assembled from a soluble precursor called tropoelastin. (iospress.com)
  • Elastin is also an important load-bearing tissue in the bodies of mammals and used in places where mechanical energy is required to be stored. (acris-antibodies.com)
  • In the body, elastin is usually associated with other proteins in connective tissues. (wikipedia.org)
  • Why We (Love) Collagen & Elastin: Collagen and elastin proteins are naturally present in healthy skin. (wegmans.com)
  • Collagen and elastin are naturally occurring structural proteins normally produced in the dermis , the middle layer of the skin. (wisegeek.com)
  • An important focus will also be novel approaches and analytical tools for investigating elastin and associated proteins in health and disease, and translational approaches for tissue engineering and regenerative medicine. (grc.org)
  • After a genome-wide search for quantitative trait loci (QTL) influencing the aortic elastin, collagen, and cell protein contents in an F2 population derived from BN and LOU rats, we identified on chromosomes 2 and 14, 3 QTL specifically controlling elastin levels, and a further highly significant QTL on chromosome 17 linked to the level of cell proteins. (ahajournals.org)
  • Elastin and collagens are the main extracellular matrix proteins of blood vessels. (ahajournals.org)
  • Assembly of polymeric elastin into its final architecture in the extracellular matrix involves both self-aggregation properties of its monomeric precursor, tropoelastin, and interactions with several matrix-associated proteins that appear to act by modulating the intrinsic self-assembly of tropoelastin. (sigmaaldrich.com)
  • Over the past decade a number of reports have described the design of synthetic genes, which encode elastin-like proteins (ELP) for bacterial expression in Escherichia coli . (pubmedcentralcanada.ca)
  • For example, recombinant silk-elastin proteins have been successfully expressed in tobacco and potato plants 12 . (pubmedcentralcanada.ca)
  • Additionally, the expression of a variety of target proteins in transgenic tobacco has been enhanced by an order of magnitude when fused to elastin-like polypeptides 13 - 15 . (pubmedcentralcanada.ca)
  • Elastins and collagens are proteins that are too large to penetrate the surface of the skin. (udym.com)
  • With 100% naturally sourced moisturizers blended with collagen & elastin proteins, this non-greasy lotion absorbs quickly to help restore and rejuvenate skin. (stives.com)
  • At the vascular level, extracellular matrix (ECM) ageing leads to molecular alterations in long half-life proteins, such as elastin and collagen, and have critical effects on vascular diseases. (ovid.com)
  • At the interface of organic and aqueous solvents, tailored amphiphilic elastin-like proteins assemble into complex supramolecular structures such as vesicles, fibers and coacervates triggered by environmental parameters. (jove.com)
  • Due to their biocompatibility and tunability on the genetic level, Elastin-like proteins (ELP) are ideal building blocks for biotechnological and biomedical applications. (jove.com)
  • Reported methods for the assembly of different supramolecular structures often involve amphiphilic proteins such as temperature sensitive elastin-like proteins (ELP) 5 , 8 , 9 , recombinant oleosin 10 and artificial protein amphiphiles 11 . (jove.com)
  • Clinically proven to improve the healthy appearance of skin, the moisture-rich formula of St. Ives® Skin Renewing Collagen Elastin Body Lotion containing a combination of collagen & elastin proteins along with 100% naturally sourced moisturizers like vegetable glycerin and soybean oil, designed to help revive your look and moisturize dry skin all day long. (chickadvisor.com)
  • The enzymes responsible for degradation of pulmonary elastin have not been established but three possibilities will be discussed: Polymorphonuclear leukocyte elastase which in phenotypical ly normal (α 1 -antitrypsin) MM subjects has been found to be present in statistically significantly higher amounts in patients with emphysema as compared with normal human subjects (2) alveolar macrophage elastase (3) specific tissue elastases. (springer.com)
  • Mandl I., Darnule T.V., Fierer J.A., Keller S., Turino G.M. (1977) Elastin Degradation in Human and Experimental Emphysema. (springer.com)
  • Background Development of emphysema and vascular stiffness in chronic obstructive pulmonary disease (COPD) may be due to a common mechanism of susceptibility to pulmonary and systemic elastin degradation. (bmj.com)
  • Objectives To investigate whether patients with COPD have evidence of systemic elastin degradation in the skin. (bmj.com)
  • Methods The authors measured cutaneous elastin degradation using immunohistochemistry (percentage area of elastin fibres) in sun-exposed (exposed) and non-sun-exposed (non-exposed) skin biopsies in 16 men with COPD and 15 controls matched for age and cigarette smoke exposure. (bmj.com)
  • In the entire cohort of ex-smokers, cutaneous elastin degradation was associated with emphysema severity, FEV 1 and pulse wave velocity. (bmj.com)
  • Conclusions Patients with COPD have increased skin elastin degradation compared with controls, which is related to emphysema severity and arterial stiffness. (bmj.com)
  • Systemic elastin degradation due to increased proteolytic activity may represent a novel shared mechanism for the pulmonary, vascular and cutaneous features of COPD. (bmj.com)
  • Is systemic elastin degradation the mechanism of increased arterial stiffness and skin wrinkling in chronic obstructive pulmonary disease? (bmj.com)
  • Men with chronic obstructive pulmonary disease (COPD) have increased skin elastin degradation compared with controls matched for age and smoking history, and this was associated with arterial stiffness and emphysema severity. (bmj.com)
  • Systemic elastin degradation due to increased proteolytic activity may represent a novel shared mechanism for the pulmonary, vascular and cutaneous features of chronic obstructive pulmonary disease. (bmj.com)
  • Elastin degradation and ensuing inflammation as emerging keys to atherosclerosis. (semanticscholar.org)
  • Moreover, current and new pharmacological strategies aiming at minimizing elastin degradation, EDP generation, and associated biological effects are discussed. (ovid.com)
  • Intoxication of rats with mercuric chloride (0.5 mg Hg/kg of body weight, daily for 10 weeks) increased the hepatic contents of soluble and insoluble collagen and elastin. (srce.hr)
  • These new techniques, as well as some previously published by other workers, were evaluated with the help of antiserum raised in sheep against insoluble chick elastin. (biochemj.org)
  • Here, we describe an approach that uses micellar assemblies of an elastin-like polypeptide (ELP) modified with silica-promoting sequences and drug conjugates that are subsequently encapsulated within a silica matrix. (rsc.org)
  • Elastin is composed largely of glycine, proline, and other hydrophobic residues and contains multiple lysine-derived crosslinks, such as desmosines, which link the individual polypeptide chains into a rubberlike network. (acris-antibodies.com)
  • Intrinsic fluorescence spectroscopy demonstrated that the elastin fluorophore is a feature of the polypeptide. (nih.gov)
  • Volume I explains elastin, its biosynthesis, physicochemical properties, and alteration in a variety of pathologies and with aging. (routledge.com)
  • Compared to the B and E versions of DermaLastyl currently available, the Bx Pro/Face formula contains higher doses of Elastatropin equal to six times the amount of elastin being lost in one year. (bio-medicine.org)
  • Now continuous use of Bx Pro/Face for one year with higher doses of Elastatropin will diminish wrinkles even further as it provides six times the amount of elastin lost in that year. (bio-medicine.org)
  • These data suggest that consumption of a diet high in fat and sugar causes stiffening of the vascular wall in resistance arteries through a process that may involve increased neuraminidase and TGF-β activity, elevated production of elastin, and a reduction in the size and number of fenestrae in the arterial IEL. (frontiersin.org)
  • Elastin-like polypeptides (ELPs) are synthesized biopolymers that have become an area of interest for their potentially practical benefits. (wikipedia.org)
  • Elastin serves an important function in arteries as a medium for pressure wave propagation to help blood flow and is particularly abundant in large elastic blood vessels such as the aorta . (wikipedia.org)
  • Genetically determined minor modifications in elastin and collagen in the aorta could influence the onset and evolution of arterial pathology, such as hypertension and its complications. (ahajournals.org)
  • The inbred Brown Norway (BN) rat strain shows an aortic elastin deficit (by 5.8% dry weight when compared with the inbred LOU rat) 5,6 and is also highly susceptible to spontaneous rupture of the internal elastic lamina (IEL) in its abdominal aorta. (ahajournals.org)
  • Elastin is particularly abundant in large elastic blood vessels such as the aorta. (acris-antibodies.com)
  • We already know all about Elastatropin in our B and E versions: that it helps to reduce the onset and appearance of wrinkles, small amounts applied daily in early adulthood can maintain a youthful level of elastin while older consumers through continued regular application can eventually replenish elastin and protect against new wrinkles. (bio-medicine.org)
  • In this work, we present a novel method for visualization of local temperature increase using elastin-like polypeptides (ELP). (rsc.org)
  • Dermatologists believe that these products, while often very moisturizing, don't actually increase collagen or elastin levels in the skin. (wisegeek.com)
  • I understand that there are many people who swear by C serums but if you look at this published study it is clear that C does increase collagen but elastin is decreased. (smartskincare.com)
  • Therefore, we hypothesized that WD-feeding would induce structural modifications to the IEL of mesenteric resistance arteries in mice, and that these changes would be associated with increased levels of circulating neuraminidase and the up-regulation of elastin and TGF-β in the arterial wall. (frontiersin.org)
  • We describe simultaneous mechanical testing and 3D-imaging of the arterial wall of isolated, live human resistance arteries, and Fiji and Ilastik image analyses for the quantification of elastin and collagen spatial organization and volume densities. (jove.com)
  • Elevated elastin fragments promote choroidal endothelial cells to increase migration, a key event in neovascular age-related macular degeneration (AMD). (arvojournals.org)
  • Albino C57/BL 6 mice were injected intraperitoneally with elastin fragments or control saline 3x weekly for one month. (arvojournals.org)
  • No major ultrastructural differences were detected in eyes of mice injected with elastin fragments compared to control eyes. (arvojournals.org)
  • In vivo, elastin fragments cause a significant increase in the transcription of genes which may play a role in pathways associated with AMD. (arvojournals.org)
  • 1 , exposure to tobacco smoking might increase secretion of proteolytic enzymes in the lung from cells of the innate immune system, thereby liberating lung elastin fragments and initiating elastin-targeted T- and B-cell mediated immunity in susceptible individuals. (ersjournals.com)
  • The elastin-null mice (ELN −/− ) die of obstructive arterial disease, 2 whereas the ELN +/− mice have reduced absolute quantities of elastin and are hypertensive, phenotypes similar to those observed in patients with supravalvular aortic stenosis and Williams syndrome. (ahajournals.org)
  • Material parameters in the model were related to elastin density and fiber orientation, and, hence, the possible microstructural changes in glucose-treated elastin. (sigmaaldrich.com)
  • Elastin is the supportive fiber in the body, and it allows your skin to bounce back from damage. (bestofmissourihands.com)
  • Full-length elastin cDNA was generated by PCR using the human lung cDNA library, and then transfected (in adenoviral vector) into rat bone marrow stromal cells (BMSCs). (ahajournals.org)