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  • Articles  (347)
  • Chemistry  (339)
  • fibronectin  (9)
  • Wiley-Blackwell  (347)
  • Annual Reviews
  • Elsevier
  • Institute of Physics
  • National Academy of Sciences
  • Periodicals Archive Online (PAO)
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  • 1985-1989  (347)
  • 1980-1984
  • 1970-1974
  • 1987  (178)
  • 1985  (169)
  • Medicine  (347)
  • Sociology
  • Energy, Environment Protection, Nuclear Power Engineering
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  • Articles  (347)
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  • 1985-1989  (347)
  • 1980-1984
  • 1970-1974
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  • 1
    Electronic Resource
    Electronic Resource
    Comparisons of evolutionarily distinct fibronectins: Evidence for the origin of plasma and fibroblast cellular fibronectins from a single gene (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 27 (1985), S. 97-107 
    Details
    ISSN: 0730-2312
    Keywords: fibronectin ; peptide mapping ; ELISA ; evolution ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Plasma and fibroblast cellular fibronectins from three different species were compared for structural similarities and differences. Partial tryptic digestion of either human or chicken plasma and cellular fibronectins yields homologous protease-resistant domains within a species but few homologies between species regardless of the source. Within a species, human or chicken plasma and fibroblast cellular fibronectins are immunologically indistinguishable as determined by the ELISA technique. There is limited immunological cross-reactivity between species. Two-dimensional tryptic peptide maps of fibroblast cellular and plasma fibronectins from the same species are also very similar: 85-95% of the spots on such maps comigrate. When peptide maps from different species are compared no more than 10% of the spots comigrate.Three models for the genetic origin of cellular and plasma fibronectins in vertebrates are considered. A model in which both fibroblast cellular and plasma fibronectins arise from the same gene is the simplest that is consistent with the data.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240270204
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  • 2
    Electronic Resource
    Electronic Resource
    Basement membrane component changes in skeletal muscle transplants undergoing regeneration or rejection (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 27 (1985), S. 337-346 
    Details
    ISSN: 0730-2312
    Keywords: laminin ; fibronectin ; basement membrane ; regeneration ; immune rejection ; skeletal muscle ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: The basement membrane of myofibers plays an important role during orderly regeneration of skeletal muscle after injury. In this report, changes in various basement membrane components were analyzed in skeletal muscle grafts undergoing regeneration (autografts) or immune rejection (allografts). The immunofluorescence technique using specific antibodies against laminin, types IV and V collagen, heparan sulfate proteoglycan, fibronectin, in combination with binding of concanavalin A (ConA) was used to monitor basement membranes. In normal muscle, these components were localized in the pericellular region of myofiber corresponding to its basement membrane, After transplantation, the majority of myofibers underwent degeneration as a result of is chemic injury, followed by regeneration from precursor myosatellite cells. Various components of basement membrane zone disappeared from the degenerating myofibers, leaving behind some unidentifiable component that still bound ConA. A new basement membrane appeared around the regenerated myotubes which persisted during maturation of the regenerating muscle, In rejected skeletal muscles, the immunoreactivity of various components persisted even after the disappearance of myotubes and myofiber cytoplasm. In addition, an accumulation of fibronectin was seen throughout the rejected muscle with the onset of immune rejection. These results demonstrate that the major basement membrane components disappear and reappear sequentially during myofiber degeneration and regeneration. Such a turnover is not seen in rejected skeletal muscles. Thus, the myofiber basement membrane is not a static structure as previously thought but one which changes chemically during degeneration and regeneration. This feature of basement membrane may be important in the orderly regeneration of skeletal muscle after injury.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240270404
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  • 3
    Electronic Resource
    Electronic Resource
    Amino acid sequence specificities of an adhesive recognition signal (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 28 (1985), S. 99-104 
    Details
    ISSN: 0730-2312
    Keywords: fibronectin ; cell adhesion ; synthetic peptides ; fibroblasts ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Synthetic peptides derived from the cell-binding domain of fibronectin have previously been found to inhibit fibronectin-mediated adhesion in vitro competitively and reversibly, as well as inhibiting cell migratory events in vivo. The amino acid sequence specificity required for this inhibitory activity has been examined further using variations of the originally identified active peptide sequences. The most active small peptide was found to be the pentapeptide Gly-Arg-Gly-Asp-Ser. Although the tetrapeptide Arg-Gly-Asp-Ser was found to retain substantial activity, it was approximately threefold less active. An “inverted” peptide sequence with these same four amino acids arranged in the mirror sym-metrical sequence Ser-Asp-Gly-Arg was found to be nearly as active as the forward sequence. However, the same inverted tetrapeptide sequence embedded in a synthetic decapeptide derived from a sequence of histocompatibility antigens has minimal activity, suggesting the importance of adjacent sequences in modifying the activity of such peptides. Neither substitution of amino acids of the same charge nor reversal of the positions of the two charged amino acids retains biological activity. Decreasing the spacing between the charged residues also causes a loss of activity. Our results suggest the hypothesis that this adhesive recognition signal consists of a specific arrangement of one acidic and one basic charged group and additional information provided by adjacent amino acids.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240280203
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  • 4
    Electronic Resource
    Electronic Resource
    The cell attachment determinant in fibronectin (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 28 (1985), S. 115-126 
    Details
    ISSN: 0730-2312
    Keywords: cell adhesion ; fibronectin ; peptides ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Fibronectin possesses a domain that interacts with cell surfaces. The ability of fibronectin to promote cell attachment can be duplicated with a short amino acid sequence, glycyl-L-arginyl-glycyl-L-aspartyl-L-serine, taken from that domain. The tripeptide Arg-Gly-Asp appears to be irreplaceable for maintenance of the activity of this peptide, wheareas the serine residue can be replaced with some, but apparently not all, possible residues. This recognition sequence, or a closely related sequence, is present in a number of proteins other than fibronectin that interact with cells. These proteins include collagens, fibrinogen, thrombin, a bacterial surface protein, and two viral proteins, as well as discoidin-I, a protein implicated in the aggregation of Dictyostelium discoideum. A similar sequence is also repeated in some, but not all, fibronectin molecules, making it possible that some fibronectin molecules have more than a single cell attachment site. Synthetic peptides constructed from sequences taken from several of these other proteins have also been shown to promote cell attachment. The tripeptide sequence may, therefore, constitute an ancient cellular recognition mechanism common to many proteins.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240280205
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  • 5
    Electronic Resource
    Electronic Resource
    Immunochemical and biochemical characterization of a glioma-associated extracellular matrix glycoprotein (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 28 (1985), S. 183-195 
    Details
    ISSN: 0730-2312
    Keywords: extracellular matrix ; glioma-associated glycoprotein ; fibronectin ; GMEM ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: A novel human glioma-associated extracellular matrix (ECM) glycoprotein has been identified by murine monoclonal antibody 81C6. The glycoprotein, designated GMEM, is expressed in the ECM of glioma and mesenchymal cell cultures, in the perivascular matrix of endothelial proliferations of human gliomas, and in the stroma of human glioma xenografts in athyrnic mice, where it has been used as a target antigen for monoclonal antibody tumor localization and radioimaging. We report here on the immunochemical and biochemical characterization of GMEM. Polyacrylamide gel analysis of immunoprecipitated [3H]-leucine- and [3H]-glucosamine-labeled ECM from the human glioma cell line U-251MG has shown that GMEM is a high-molecular-weight macromolecule (Mr ∼ 1,000,000) composed of Mr ∼ 230,000 disulfide-bonded glycoprotein subunits. Immunoprecipitation, immunoblot, and one-dimensional peptide map analysis have shown that GMEM is distinct from human fibroblast and plasma fibronectin. These results support previous immunohistology and absorption analysis findings, indicating that GMEM is distinct from fibronectin, laminin, and glycosaminoglycans secreted by U-251MG.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240280302
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  • 6
    Electronic Resource
    Electronic Resource
    Binding of antibodies in liposomes to extracellular matrix antigens (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 28 (1985), S. 23-29 
    Details
    ISSN: 0730-2312
    Keywords: fibronectin ; laminin ; liposomes ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: We have incorporated antibodies against fibronectin or laminin into liposomes and studied their interaction with insoluble forms of these antigens. The antibodies, after modification by palmitoylchloride, were incorporated into the lipid bilayer by the cholate dialysis method. The antibodies in the liposomes recognized their specific antigen with little reaction to the alternative attachment protein or to albumin (〈2%). The binding of antibody-containing liposomes to insoluble antigen was inhibited by soluble antibodies to the respective antigens but not by antibodies to other antigens. The affinity constant of the liposome-antibody complex with the antigen was estimated at 1-10 × 10-9 M liposomes. Thus, antibodies in liposomes retain their reactivity and specificity, and the reaction constant is comparable to that observed for immune complexes.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240280105
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of a membrane-associated glycoprotein complex implicated in cell adhesion to fibronectin (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 28 (1985), S. 307-318 
    Details
    ISSN: 0730-2312
    Keywords: glycoprotein complex ; cell adhesion ; fibronectin ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: We have characterized a 140-kDa glycoprotein complex purified by a monoclonal antibody and implicated in cell adhesion to the extracellular molecule fibronectin. Three major polypeptide components were purified by monoclonal antibody JG22E, which had apparent molecular weights of 155,000 (band 1), 135,000 (band 2), and 120,000 (band 3). In two-dimensional gel electrophoresis, each subunit migrated as either a broad band or a series of spots at acidic isoelectric points. After treatment with neuraminidase, the spots became focused around pH 6.2 (band 1), pH 5.6 (band 2), and pH 5.3 (band 3). These three major bands were compared by two-dimensional peptide mapping in a series of pairwise combinations and were found to be distinct proteins. In sucrose gradients, these proteins co-migrated as a complex sedimenting at approximately 8.4 S either before or after affinity purification, whereas separated subunits migrated at 4.7 to 5.8 S. Amino acid analysis revealed no detectable hydroxyproline and a composition characterized by a substantial number of cysteine residues compared to the average protein. Our results suggest that a noncovalent complex of structurally distinct glycoproteins is involved in adhesive interactions of fibronectin with cells.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240280409
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  • 8
    Electronic Resource
    Electronic Resource
    Human keratinocytes that have not terminally differentiated synthesize laminin and fibronectin but deposit only fibronectin in the pericellular matrix (1985)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 28 (1985), S. 127-141 
    Details
    ISSN: 0730-2312
    Keywords: keratinocytes ; fibronectin ; laminin ; extracellular matrix ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Fibronectin and laminin production by human keratinocytes cultured in serum-free, low-calcium medium without a fibroblast feeder layer were examined by several techniques. By indirect immunofluorescence, fibronectin but not laminin appeared as short radial fibrils between the cells and the substratum, and in the pericellular matrix. Synthesis of fibronectin and laminin by 7-day keratinocyte cultures was determined by 18 hr 35S-methionine metabolic labeling followed by sodium dodecyl sulfate polyacrylamide gel electrophoresis and autoradiography. Fibronectin accounted for 2.9% of total synthesized protein, 26.5% of fluid phase protein secretion, and 4.3% of deposited ECM protein. In contrast, only 0.1% of the total synthesized protein was laminin, little (6.3%) of this product was secreted, and none of this product was deposited in the ECM. Our results indicate that human keratinocytes under culture conditions that prevent terminal differentiation in vitro can synthesize, secrete, and deposit fibronectin in the extracellular matrix. Although these cells synthesize laminin, they secrete very little and deposit no detectable laminin in the matrix under these culture conditions. From these data we believe that fibronectin may play an important role in the interaction of epidermal cells with connective tissue matrix during wound healing or morphogenesis in in vivo situations in which the epidermis is not terminally differentiated.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240280206
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  • 9
    Electronic Resource
    Electronic Resource
    Parallel flow arteriovenous shunt for the ex vivo evaluation of heparinized materials (1985)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 19 (1985), S. 161-178 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The patency of heparin-polyvinyl alcohol (hep-PVA) coated polyethylene tubing was found to be significantly longer than control tubes coated with polyvinyl alcohol (PVA) but without heparin at low flow rates in dogs using a novel parallel flow arteriovenous shunt designed to avoid surgical artifacts. A standard Silastic chronic shunt (3.18 mm i.d.) was inserted between the iliac artery and vein of a dog. After a 2-week recovery period, a small diameter coated polyethylene tube (1.14 mm i.d.) was connected in parallel with the exteriorized portion of the chronic shunt through a pair of Silastic Y-connectors, so that 〈3% of the shunt flow was diverted into the test tube. The chronic shunt was reused many times over a 〉6 month patency period, eliminating the need for frequent surgery and reducing interanimal variability in the results. The difference in patency between heparinized and control tubes was greater at higher mainshunt flow rates indicating the presence of a significant effect of the Y-connectors on platelet adhesion or aggregation. This effect was manifested in a time-dependent reduction in circulating platelet count. Scanning electron microscopy (SEM) examination of the midportion of the heparinized tubes after occlusion demonstrated the absence of platelet and fibrin deposits, unlike the control tubes without heparin. Although the Y-connectors played a significant role, they did not dominate the thrombotic processes occurring in this shunt and consequently the biological effectiveness of the immobilized heparin could be demonstrated.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820190206
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  • 10
    Electronic Resource
    Electronic Resource
    Mechanical stability of elastomeric polymers for blood pump applications (1985)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 19 (1985), S. 179-193 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: As a series of studies on the mechanical properties of materials used in cardiac prostheses, static and dynamic characteristics and stability of five kinds of elastomeric polymers have been studied by uniaxial tensile and fatigue tests in air at room temperature and in saline solution at 37°C. Of all materials tested in this study, Texin MD85A, a segmented polyether polyurethane, has the lowest flexibility under static and dynamic conditions, with relatively high strength. Hexsyn, a polyolefin rubber, is highly flexible with little stress relaxation. However, this material has very low tensile strength and short elongation, and shows unstable change in the elastic modulus during cyclic deformation. Avcothane 51, a copolymer of polyurethane and silicon, has unstable mechanical properties and gradually stiffens upon cyclic deformation. On the other hand, Biomer, a segmented polyether polyurethane, has high flexibility and shows the most stable behavior during cyclic deformation regardless of test environment. Toyobo TM5, a similar segmented polyurethane to Biomer, has higher strength and ductility than Biomer, although its static and dynamic flexibility are slightly worse and less stable than those of Biomer. These results indicate that Biomer and Toyobo TM5 are more suitable for flexible components of cardiac prostheses.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820190207
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