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Role of Actin Cytoskeleton During Mammalian Sperm Acrosomal Exocytosis

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Sperm Acrosome Biogenesis and Function During Fertilization

Abstract

Mammalian sperm require to undergo an exocytotic process called acrosomal exocytosis in order to be able to fuse with the oocyte. This ability is acquired during the course of sperm capacitation. This review is focused on one aspect related to this acquisition: the role of the actin cytoskeleton. Evidence from different laboratories indicates that actin polymerization occurs during capacitation, and the detection of several actin-related proteins suggests that the cytoskeleton is involved in important sperm functions. In other mammalian cells, the cortical actin network acts as a dominant negative clamp which blocks constitutive exocytosis but, at the same time, is necessary to prepare the cell to undergo regulated exocytosis. Thus, F-actin stabilizes structures generated by exocytosis and supports the physiological progression of this process. Is this also the case in mammalian sperm? This review summarizes what is currently known about actin and its related proteins in the male gamete, with particular emphasis on their role in acrosomal exocytosis.

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Acknowledgments

We would like to thank the National Institutes of Health (NIH, R01TW008662), Agencia Nacional de Promoción Científica y Tecnológica (PICT 2012-1175), and CONICET (PIP 740) for funding support.

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Correspondence to Mariano G. Buffone .

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© 2016 Springer International Publishing Switzerland

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Romarowski, A., Luque, G.M., La Spina, F.A., Krapf, D., Buffone, M.G. (2016). Role of Actin Cytoskeleton During Mammalian Sperm Acrosomal Exocytosis. In: Buffone, M. (eds) Sperm Acrosome Biogenesis and Function During Fertilization. Advances in Anatomy, Embryology and Cell Biology, vol 220. Springer, Cham. https://doi.org/10.1007/978-3-319-30567-7_7

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  • DOI: https://doi.org/10.1007/978-3-319-30567-7_7

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-30565-3

  • Online ISBN: 978-3-319-30567-7

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