Integrin alpha(v)beta1 is an adenovirus coreceptor

Journal of Virology
E LiG R Nemerow

Abstract

The human embryonic kidney (HEK293) cell line, commonly used for recombinant adenovirus (Ad) propagation, does not express the Ad coreceptor alpha(v)beta3 or alpha(v)beta5 integrins, yet these cells are efficiently infected by Ad vectors. Here we demonstrate that Ad binds to HEK293 cells via the fiber receptor CAR and is subsequently internalized via interaction with integrin alpha(v)beta1. Function-blocking antibodies directed against alpha(v) or beta1, but not beta3, beta5, or alpha5, integrin subunits block Ad infection and viral endocytosis. Therefore, alpha(v)beta1 serves as a coreceptor for Ad infection, and the lack of beta3 and/or beta5 but the relatively high expression of alpha(v)beta1 integrins on certain tumor cell types may explain why these cells are readily transduced by Ad vectors.

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Citations

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