Abstract

Dynamic cellular rearrangements involving the actin cytoskeleton are required of both Sertoli and germ cells during spermatogenesis. Rho family small G proteins have been implicated in the control of the actin cytoskeleton in numerous cell types. Therefore, RhoA and Rac1 were investigated in Sertoli and germ cells. RhoA and Rac1 have been detected at both the mRNA and protein levels in these cells. In addition, Sertoli cell L-selectin is shown to interact with actin binding proteins, potentially providing a link between L-selectin and Rac1 signaling. Finally, inactivation of Sertoli cell Rho family proteins yields disruption of the actin cytoskeleton.

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