منابع مشابه
Tests to measure the quality of spermatozoa at spermiation.
This commentary is to critique the revised World Health Organization (WHO) semen analysis manual as it pertains to characteristics of a spermatozoon at spermiation. The aims of the revised WHO manual include improving the 'quality of semen analysis' without any restriction to clinical use. Furthermore, the manual states that semen analysis may be useful for (a) 'investigating male fertility sta...
متن کاملAsymmetry of Spermiation and Sperm Surface Charge Patterns over the Giant Acrosome in the Musk Shrew
Spermatozoa of the shrew Suncus murinus, a mammal with abdominal testes, exhibit four unusual features: a giant acrosome; a dorsoventral asymmetry of their spermiation; a dorsoventral asymmetry of their head surface character; and also apparent surface maturity as they enter the epididymis. A Sertoli cell-periacrosomal cisternal complex envelops the giant acrosome during spermatid maturation. S...
متن کاملMechanism of hCG-induced spermiation in the toad Rhinella arenarum (Amphibia, Anura).
In Rhinella arenarum spermiation occurs as a consequence of LH/FSH increase during the amplexus or by a single dose of hCG, among other gonadotropins. The present study employs an in vitro system to study the mechanism of action of hCG in the spermiation of R. arenarum. Testicular fragments were incubated for 2h at 28°C in the presence or absence of 20IU hCG with or without different PKA/PKC in...
متن کاملAdhesion and signaling proteins spatiotemporally associated with spermiation in the rat.
Spermiation, the process by which late spermatids separate from the Sertoli cell, is disrupted by a number of toxicants. In this study, we used immunohistochemistry (IHC) to identify some of the proteins associated with the spermatid-Sertoli junction. We confirmed the presence of tubulin, actin, and vinculin at the luminal edge of the seminiferous tubule, and we determined that paxillin is also...
متن کاملLong photoperiod on sea cages delays timing of first spermiation and enhances growth 1 in male
12 Two large groups of fingerling (3.2g) male European sea bass (around 75,000 13 individuals each) reared in net sea cages for a period of two years were exposed to two 14 different photoperiods starting in June: either ambient photoperiod (37o 24 ́ N) (NP) or a 15 constant long photoperiod (LP; 18 hours light: 6 hours dark, 18L: 6D). Long days had limited 16 effect on somatic growth at the tim...
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ژورنال
عنوان ژورنال: Spermatogenesis
سال: 2011
ISSN: 2156-5562
DOI: 10.4161/spmg.1.1.14525