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ISSN: 2161-0932

Gynecology & Obstetrics
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Editorial

Mechanisms of Mammalian Sperm-Egg Interaction Leading to Fertilization

Daulat RP Tulsiani*

Department of Obstetrics and Gynecology, Vanderbilt University School of Medicine, Nashville, Tennessee, 37232, USA

*Corresponding Author:
Daulat RP Tulsiani
Department of Obstetrics and Gynecology
Vanderbilt University School of Medicine
Nashville, Tennessee, 37232, USA
E-mail: [email protected]

Received date: September 18, 2012; Accepted date: September 21, 2012; Published date: September 24, 2012

Citation: Tulsiani DRP (2012) Mechanisms of Mammalian Sperm-Egg Interaction Leading to Fertilization. Gynecol Obstet 2:e107. doi: 10.4172/2161-0932.1000e107

Copyright: © 2012 Tulsiani DRP. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Mammalian fertilization, a species-specific event, is the net result of a highly orchestrated process that collectively results in the fusion of two radically different-looking haploid cells, sperm and egg, to form a diploid zygote, a cell with somatic chromosome numbers. Prior to the interaction of the opposite gametes, mammalian spermatozoa undergo many fascinating changes during development in the testis, maturation in the epididymis, and capacitation in the female genital tract. Only the capacitated spermatozoa interact with the extracellular coat, the zona pellucida, which surrounds the mammalian oocyte. The tight and irreversible binding of the opposite gametes in the mouse and many other mammals studied, including human, starts a ca2+- dependent signal transduction pathway that results in the exocytosis of acrosomal contents at the site of the sperm binding. The hydrolytic action of the acrosomal glycohydrolases and proteinases, released at the site of the sperm-egg binding, along with the enhanced thrust generated by the hyperactivated spermatozoon, are important factors that regulate the penetration of the zona pellucida and fusion of the oppositegametes. The purpose of this editorial is to highlight the well programmed molecular events that are necessary before sperm-egg adhesion. In addition, my intention is to discuss the increasing controversy about the mechanism(s) that regulate mammalian sperm-egg interactions.

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