PMID: 8592057Jan 1, 1996Paper

Studies in vitro on the role of alpha v and beta 1 integrins in the adhesion of human dermal fibroblasts to provisional matrix proteins fibronectin, vitronectin, and fibrinogen

The Journal of Investigative Dermatology
J Gailit, R A Clark

Abstract

Fibroblasts that migrate into a wound during the early stages of repair use cell surface integrins to interact with extracellular molecules as they move away from the interstitial matrix of normal tissue and into the provisional matrix of the wound. Therefore, to understand a critical phase of wound healing, it is necessary to understand the details of integrin involvement. Normal adult human dermal fibroblasts in culture express many receptors for the provisional matrix proteins fibronectin, vitronectin, and fibrinogen, including the integrins alpha 3 beta 1, alpha 4 beta 1, alpha 5 beta 1, alpha v beta 1, alpha v beta 3, and alpha v beta 5. We used quantitative flow cytometry to estimate the relative numbers of these receptors and immunoprecipitation to confirm the expression of alpha v beta 1. Adult human dermal fibroblasts primarily use beta 1 integrins, alpha 4 beta 1, alpha 5 beta 1, and possibly alpha v beta 1, for attachment to fibronectin. alpha v beta 3 and perhaps other integrins containing the alpha v subunit serve fibroblasts as secondary or auxiliary receptors for fibronectin. In contrast, these cells use alpha v integrins but probably not beta 1 integrins for attachment to vitronectin. alpha v beta 3 and alpha v ...Continue Reading

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