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Production of soluble integrin alpha2beta1 heterodimer complex functionally active in vitro and in vivo.

Abstract：

:Integrin alpha2beta1, which is a membrane protein consisting of noncovalently bound alpha2 and beta1 chains, mediates cell binding to collagen and plays a role in platelet functions. DNAs encoding the chimeric proteins in which the extracellular domains of each alpha2 and beta1 chain was fused to hinge and Fc regions of human IgG(1)gamma chain were cotransfected into CHO cells. Soluble integrin alpha2beta1 (salpha2beta1) in which alpha2 and beta1 chains were covalently bound by disulfide bonds was recovered from the culture supernatant. salpha2beta1 maintained functional characteristics of cell surface alpha2beta1 as indicated by cation-dependent binding to collagen and conformational changes induced by cations or ligand. Intravenously administered salpha2beta1 in rats colocalized with collagen in inflamed microvessels. Moreover, salpha2beta1-conjugated liposome administered intravenously reduced bleeding time of the thrombocytopenic mice. These results indicated that salpha2beta1 has pharmaceutical utilities as an agent for detecting injured vessels and a component of platelet substitute.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Kainoh M,Tanaka T

doi

10.1006/bbrc.2001.6195

subject

Has Abstract

pub_date

2002-01-11 00:00:00

pages

305-10

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006291X01961959

journal_volume

290

pub_type

杂志文章

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