منابع مشابه
Evolution and spermatogenesis.
Sexual reproduction depends on the production of haploid gametes, and their fusion to form diploid zygotes. Here, we discuss sperm production and function in a molecular and functional evolutionary context, drawing predominantly from studies in model organisms (mice, Drosophila, Caenorhabditis elegans). We consider the mechanisms involved in establishing and maintaining a germline stem cell pop...
متن کاملSpermatogenesis and Cryptorchidism
Cryptorchidism represents the most common endocrine disease in boys, with infertility more frequently observed in bilateral forms. It is also known that undescended testes, if untreated, lead to an increased risk of testicular tumors, usually seminomas, arising from mutant germ cells. In normal testes, germ cell development is an active process starting in the first months of life when the neon...
متن کاملSpermatogenesis and nutrition.
Asdell, S. A,, Bogart, R. & Sperling, G. (1941). 1Mem. Cornell ugric Exp. S ta . no. 238. Bodenheimer, F. S. & Sulman, F. (1946). Ecology, 27, 235. Bonsma, J. C. (1948). Personal communication. Dunlop, G. (1944). Proc. Bri t . SOC. Anim. Prod. and Meet., p. 57. Du Toit, P. J. & Bisschop, J . H. R. (1929). Rep. vet . Res. S. Ajr. 15, 1059. Eckles, C. H. (1920). Res. Bull. Mo. ugric. Exp. S ta . ...
متن کاملEstrogen and spermatogenesis.
Although it has been known for many years that estrogen administration has deleterious effects on male fertility, data from transgenic mice deficient in estrogen receptors or aromatase point to an essential physiological role for estrogen in male fertility. This review summarizes the current knowledge on the localization of estrogen receptors and aromatase in the testis in an effort to understa...
متن کاملCytoskeletal dynamics and spermatogenesis.
Different cellular events occur during spermatogenesis, and these include (i) mitosis for self-renewal of spermatogonia, (ii) differentiation of type A spermatogonia into type B and commitment of type B spermatogonia to develop into preleptotene primary spermatocytes, (iii) transit of preleptotene/leptotene spermatocytes across the blood-testis barrier in coordination with germ cell cycle progr...
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ژورنال
عنوان ژورنال: Philosophical Transactions of the Royal Society B: Biological Sciences
سال: 2010
ISSN: 0962-8436,1471-2970
DOI: 10.1098/rstb.2009.0323