01853nas a2200193 4500008004100000245006500041210006400106260000900170300001100179490000800190520118900198100001901387700002801406700001801434700002401452700002301476700001701499856014301516 2016 eng d00aSperm Capacitation and Acrosome Reaction in Mammalian Sperm.0 aSperm Capacitation and Acrosome Reaction in Mammalian Sperm c2016 a93-1060 v2203 a
Physiological changes that endow mammalian sperm with fertilizing capacity are known as sperm capacitation. As part of capacitation, sperm develop an asymmetrical flagellar beating known as hyperactivation and acquire the ability to undergo the acrosome reaction. Together, these processes promote fertilizing competence in sperm. At the molecular level, capacitation involves a series of signal transduction events which include activation of cAMP-dependent phosphorylation pathways, removal of cholesterol, hyperpolarization of the sperm plasma membrane, and changes in ion permeability. In recent years, new technologies have aided in the study of sperm signaling molecules with better resolution, at both spatial and temporal levels, unraveling how different cascades integrate and cooperate to render a fertilizing sperm. Despite this new information, the molecular mechanisms connecting capacitation with acrosomal exocytosis and hyperactivation are not well understood. This review brings together results obtained in mammalian species in the field of sperm capacitation with special focus on those pathways involved in the preparation to undergo the acrosomal reaction.
1 aStival, Cintia1 aMolina, Lis, Del C Puga1 aPaudel, Bidur1 aBuffone, Mariano, G1 aVisconti, Pablo, E1 aKrapf, Dario uhttps://www.umass.edu/veterinary-animal-sciences/research-faculty/publications/sperm-capacitation-and-acrosome-reaction-in-mammalian-sperm