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Cholinergic inhibition of cAMP accumulation in Sertoli cells cultured from immature hamsters
Sertoli cell cAMP muscarinic receptors FSH hamsters testis
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2009/2/23
Acetylcholine inhibits FSH-induced cAMP accumulation in cultured Sertoli cells from immature hamsters. This action of acetylcholine is mimicked by muscarinic cholinergic agonists with a rank order o...
A comparative analysis of cAMP-dependent protein kinase regulatory subunits in sea urchin and rat spermatozoa
spermatozoa azido photoprobes protein kinase nucleotides epididymis
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2009/2/23
8-Azido cAMP photoaffinity labeling of cAMP-dependent protein kinase regulatory subunits (R1 = 49 K;R2 = 55K) was done on spermatozoa from species lacking, and species containing an epididymis. Sper...
Relationship Between Fertilizing Ability and cAMP in Human Spermatozoa
capacitation of human spermatozoa cAMP in human spermatozoa fertilization of zona-free hamster eggs
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2009/2/19
The goal of this study was to investigate the relationship between cAMP and the fertilizing ability of human spermatozoa. Levels of cAMP were measured in human spermatozoa during 6-hour in vitro i...
FSH Stimulation of cAMP Accumulation in Hamster Sertoli Cells：Effect of Age and Optic Enucleation
cAMP Sertoli cells hamsters optic enucleation
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2009/2/19
Sertoli cells isolated from immature, adult, and adult optic-enucleated hamsters respond to FSH, but not to LH, with an increase in cAMP accumulation. There is an age-related decline in responsivene...
Round spermatids show normal testis-specific H1t but reduced cAMP-responsive element modulator and transition protein 1 expression in men with round-spermatid maturation arrest
ene expression human testis spermatogenic impairme
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2009/2/18
During spermiogenesis, histones are replaced by transition proteins, which in turn are replaced by protamines. The TNP1 gene-encoding TP1 (transition protein 1) protein contains a cAMP-responsive el...
Facilitative effect of pulsed addition of dibutyryl cAMP on the acrosome reaction of noncapacitated human spermatozoa
pulsed addition dibutyryl cAMP noncapacitated human spermatozoa
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2009/2/11
The in vitro acrosome reaction of noncapacitated human spermatozoa was induced by both calcium ionophore (A23187) and dibutyryl adenosine cyclic monophosphate (Bu2cAMP), a membrane permeant cyclic n...
Does gonadotropin receptor complex have an amplifying role in cAMP/testosterone production in Leydig cells?
Human chorionic gonadotropin (hCG) luteinizing hormone (LH) Leydig cell purification testis
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2009/2/7
The dose-response relationship between luteinizing hormone/human chorionic gonadotropin (LH/hCG)-stimulated biological response and 125I-labeled hCG binding was studied in purified Leydig cells from...
cAMP response of cultured Sertoli cells from immature and adult hamsters. Effect of hypophysectomy and cryptorchidism
cultured Sertoli cells immature and adult hamsters hypophysectomy cryptorchidism
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2009/2/6
The ability of FSH to stimulate cAMP accumulation in Sertoli cells cultured from either hamsters or rats declines with the age of the animal. Hypophysectomy or bilateral cryptorchidism of immature r...
Preservation of Spermatogenesis in Spinal Cord Injured Rats With Exogenous Testosterone. Relationship With Serum Testosterone Levels and Cellular Localization of cAMP Responsive Element Modulator
Sertoli cells CREM sperm
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2008/12/22
The current experiment examined the effects of exogenous testosterone (T) on spermatogenesis in rats with spinal cord injury (SCI) and their relationship with the cellular distribution of a cyclic AMP...