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Title: SNAREs in Mammalian Sperm: Possible Implications for Fertilization
Authors: Ramalho-Santos, João 
Moreno, Ricardo D. 
Sutovsky, Peter 
Chan, Anthony Wing-Sang 
Hewitson, Laura 
Wessel, Gary M. 
Simerly, Calvin R. 
Schatten, Gerald 
Keywords: sperm; fertilization; membrane; exocytosis; acrosome
Issue Date: 2000
Citation: Developmental Biology. 223:1 (2000) 54-69
Abstract: Soluble N-ethylmalameide-sensitive factor attachment protein receptor (SNARE) proteins are present in mammalian sperm and could be involved in critical membrane fusion events during fertilization, namely the acrosome reaction. Vesicle-associated membrane protein/synaptobrevin, a SNARE on the membrane of a vesicular carrier, and syntaxin 1, a SNARE on the target membrane, as well as the calcium sensor synaptotagmin I, are present in the acrosome of mammalian sperm (human, rhesus monkey, bull, hamster, mouse). Sperm SNAREs are sloughed off during the acrosome reaction, paralleling the release of sperm membrane vesicles and acrosomal contents, and SNARE antibodies inhibit both the acrosome reaction and fertilization, without inhibiting sperm-egg binding. In addition, sperm SNAREs may be responsible, together with other sperm components, for the asynchronous male DNA decondensation that occurs following intracytoplasmic sperm injection, an assisted reproduction technique that bypasses normal sperm-egg surface interactions. The results suggest the participation of sperm SNAREs during membrane fusion events at fertilization in mammals.
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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