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Giving off mixed signals--distinct functions of alpha5beta1 and alphavbeta3 integrins in regulating cell behaviour.

Wiley Blackwell (John Wiley & Sons)
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The formation, maturation, and dissolution of focal adhesions are basic prerequisites of cell migration and rely on the recruitment, signalling, and endocytosis of integrins. In many instances, extracellular matrix molecules are recognised by a number of integrins, and it is the sequential involvement of different integrins that allows establishment of cell polarity and migration towards a matrix stimulus. In this review, we consider both the similarities and differences between two key fibronectin receptors, alpha(v)beta(3) and alpha(5)beta(1) integrin. By considering the GTPase and kinase signalling and trafficking of two such closely-related receptors, we begin to understand how cell migration is coordinated.

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