A functional monoclonal antibody recognizing the human alpha 1-integrin I-domain
| Autor: | P. J. Gotwals, L. Zardi, V. Kotelianski, Monica Fabbri, Maria Raffaella Zocchi, P. Castellani |
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| Rok vydání: | 1996 |
| Předmět: |
Integrins
Immunology Integrin Integrin alpha1 Alpha (ethology) Biochemistry CD49c Polymerase Chain Reaction Collagen receptor Mice Laminin Antibody Specificity Antigens CD Neoplasms Genetics Immunology and Allergy Animals Humans Mice Inbred BALB C biology Chemistry Antibodies Monoclonal General Medicine Molecular biology Immunohistochemistry Cell biology Fibronectins Rats Fibronectin Killer Cells Natural Integrin alpha M biology.protein Integrin beta 6 Collagen HeLa Cells |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0001-2815 |
| Popis: | Alpha 1 beta 1 heterodimer is a member of the integrin receptor superfamily that has been described to be involved in cell-matrix binding through its interaction with collagens, fibronectin and laminin. The alpha 1 integrin belongs to a subset of I-domain containing integrins that includes alpha M, alpha L, alpha X and alpha 2. In this study we describe an anti-alpha 1 mAb (FB12) that recognizes an epitope located in the human alpha 1 I-domain, since the mAb can bind to human, but not to rat, recombinant I-domain GST fusion protein. FB12 mAb efficiently and specifically inhibits the binding of activated human lymphocytes to laminin, collagen and fibronectin. These data support the notion that the alpha 1 I-domain itself has an important role in receptor-ligand binding. In particular, we show that alpha 1 integrin-dependent lymphocyte adhesion to fibronectin is I-domain mediated, at variance with the RGD-dependent adhesion which seems to be mediated by the beta 1 rather than the alpha 1 integrin chain. Lastly, the overexpression of the alpha 1-integrin by stromal cells and blood vessels of solid tumors may suggest a role for this integrin in tumor biology. |
| Databáze: | OpenAIRE |
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