Collagen-binding integrins as pharmaceutical targets.

Abstract:

:In recent years, our understanding of the molecular interaction of collagens with their cognate integrin receptors has remarkably improved. Structural elucidations of both the integrin and the collagenous triple helix have contributed to this achievement. The structures of an entire integrin ectodomain and of an A-domain, which is unique to the integrin alpha subunits of collagen-binding and leukocyte integrins, have been resolved crystallographically. Furthermore, a complex of such an integrin alpha subunit A-domain with its collagenous binding partner has revealed their interaction on the molecular level and gave first evidence in the conformational alterations which may convey the signal of ligand occupancy through the integrin into the cells. In parallel, the tissue distribution and biological functions of collagen-binding integrins have been characterised. Nowadays, the contribution of distinct integrins to different physiological and pathological processes is known. Among the best studied examples is the collagen-induced platelet activation and aggregation, in which alpha2beta1 integrin is involved. Together with alpha1beta1 integrin, it also plays a role in inflammatory processes. To manipulate processes which are mediated by collagen-binding integrins, compounds are developed which mimic the collagen ligand. Not only the structural information of the integrin:collagen-interaction but also improvements in the chemical synthesis of a collagenous triple helix facilitate the development of agonists and antagonists of collagen-binding integrins. Furthermore, another impact in this search comes from the discovery of high-affinity inhibitors from venoms, which lack a collagenous triple-helix.

journal_name

Curr Pharm Des

authors

Eble JA

doi

10.2174/1381612053381738

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

867-80

issue

7

eissn

1381-6128

issn

1873-4286

journal_volume

11

pub_type

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