Male germ cell apoptosis: regulation and biology.
Cellular apoptosis appears to be a constant feature in the adult testis and during early development. This is essential because mammalian spermatogenesis is a complex process that requires precise homeostasis of different cell types. This review discusses the latest information available on male germ cell apoptosis induced by hormones, toxins and temperature in the context of the type of apoptotic pathway either the intrinsic or the extrinsic that may be used under a variety of stimuli. The review also discusses the importance of mechanisms pertaining to cellular apoptosis during testicular development, which is independent of exogenous stimuli. Since instances of germ cell carcinoma have increased over the past few decades, the current status of research on apoptotic pathways in teratocarcinoma cells is included. One other important aspect that is covered in this review is microRNA-mediated control of germ cell apoptosis, a field of research that is going to see intense activity in near future. Since knockout models of various kinds have been used to study many aspects of germ cell development, a comprehensive summary of literature on knockout mice used in reproduction studies is also provided.
Shaha
Chandrima
C
Cell Death and Differentiation Research Laboratory, National Institute of Immunology, New Delhi 110067, India. cshaha@nii.res.in
Tripathi
Rakshamani
R
Mishra
Durga Prasad
DP
D000818:Animals; D017209:Apoptosis / Q000235:genetics / Q000502:physiology; D008297:Male; D013091:Spermatogenesis / Q000235:genetics / Q000502:physiology*; D013094:Spermatozoa / Q000166:cytology / Q000502:physiology*; D013737:Testis / Q000502:physiology*
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