Two subfragments of laminin, E8, a major part of the long arm, and E1-4, the three short arms, promote cell adhesion and spreading. Three distinct types of adhesive behavior are seen in short term (1 h) assays, typified by secondary murine fibroblasts, adherent only on fibronectin; secondary murine myoblasts, adherent on fibronectin, laminin, and the E8 fragment; and Rugli human glioblastoma ce...

Laminin 1 (alpha1beta1gamma1) and laminin 5 (alpha3beta3gamma2) induce cell adhesion with different involvement of integrins: both are ligands for the alpha6beta1 integrin, while alpha3beta1 integrin has affinity for laminin 5 only. These two laminin isoforms therefore provide good models to investigate whether alpha3beta1 and alpha6beta1 integrins play different roles in signal transduction an...

We have examined cultures of neonatal human foreskin keratinocytes (HFKs) to determine the ligands and functions of integrins alpha 2 beta 1, and alpha 3 beta 1 in normal epidermal stratification and adhesion to the basement membrane zone (BMZ) in skin. We used three assay systems, HFK adhesion to purified extracellular matrix (ECM) ligands and endogenous secreted ECM, localization of integrins...

Recent studies ascribed some biological actions of cell adhesion and cell outgrowth to the carboxyl-most 1200 amino acids of vertebrate laminin A chains. Here we report a 6.1-kilobase pair nucleotide cDNA sequence encoding 1951 amino acids and the carboxyl end of a Drosophila laminin A chain. It corresponds to the mouse laminin A domains G, I, II, and III, but may represent a different type of ...

Laminin, a basement membrane glycoprotein promotes both cell attachment and neurite outgrowth. Separate domains on laminin elicit these responses, suggesting that distinct receptors occur on the surface of cells. NG108-15 neuroblastoma-glioma cells rapidly extend long processes in the presence of laminin. We report here that 125I-labeled laminin specifically binds to these cells and to three me...

The locomotion of murine myoblasts over the extracellular matrix components laminin and fibronectin was analyzed using quantitative videomicroscopy, and the organization of the cytoskeleton was observed in parallel immunofluorescence studies. Cells plated on the laminin-nidogen complex locomoted twice as fast as on laminin alone. The main form of translocation on laminin was a jerky cycle of pr...

Development of the mammary gland is influenced both by the systemic hormonal environment and locally through cell-cell and cell-extracellular matrix (ECM) interactions. We have previously demonstrated aberrant mammary gland morphogenesis in transgenic mice with elevated levels of the long isoform of beta1,4-galactosyltransferase 1 (GalT), a proportion of which is targeted to the plasma membrane...