Abstract
Male factors account for 40% of infertility cases and most are caused by low sperm count, poor sperm quality or both. Defects in sperm are directly linked to reproductive malfunctions, and these defects may be caused by genetic mutations, environmental factors and exposure to free radicals, for example. Almost half of the male infertility cases have no known cause, indicating the lack of sensitive tests for the diagnosis of infertility. Proteomics has evolved as a major research field in biology and medicine, to identify and validate potent targets, at the molecular level, for development of more sensitive diagnostic tools. The recent advances in this field focus on the identification of differentially expressed proteins and analyzing their functional aspects for better understanding of the biological pathways. It not only provides a platform to discover biomarkers of infertility, but may also help in the design of effective male contraceptives. This article discusses various insights of proteomics for exploring biomarkers of male infertility in sperm. It also discusses the enhanced understanding of reproductive physiology offered by data produced by proteomic studies of spermatozoa.
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