搜索结果: 1-13 共查到“性科学 epididymal sperm”相关记录13条 . 查询时间(0.093 秒)
Some vasovasostomized men are characterized by low levels of P34H, an epididymal sperm protein
Spermatozoa vasectomy
2009/2/18
During epididymal transit, sperm surface proteins involved in the fertilization process can be added or modified. P34H, a human epididymal-sperm protein, is proposed to be involved in the interact...
Effect of acute androgen withdrawal by GnRH antagonist on epididymal sperm motility and morphology in the cynomolgus monkey
acute androgen withdrawal GnRH epididymal sperm motility
2009/2/18
Hormonal male contraception requires an induction phase before azoospermia and contraceptive safety are achieved. The nature of spermatozoa that may be ejaculated during this induction phase was s...
Motility potential of macaque epididymal sperm: the role of protein phosphatase and glycogen synthase kinase-3 activities
Monkey spermatozoa enzymes caput caudal
2009/2/18
Human and monkey ejaculated sperm contain protein phosphatase-1 (PP1), PP1 inhibitor 2 (12), and glycogen synthase kinase-3 (GSK-3). Inhibition of ejaculated human sperm protein phosphatase (PP) a...
Rat testicular germ cells and epididymal sperm contain active P450 aromatase
Estrogen testis epididymis
2009/2/17
Although testosterone is the principal sex steroid produced by the testis, estrogen is known to be produced by both Leydig and Sertoli cells during different developmental periods. Additionally, evide...
Mouse epididymal sperm contain active P450 aromatase which decreases as sperm traverse the epididymis
Spermatozoa estrogen efferent ductules cytoplasmic droplet testicular excurrent ducts
2009/2/16
Recently we reported that mouse germ cells in the testis contain active P450 aromatase (P450arom), the enzyme that converts androgens to estrogens. This finding suggested that germ cells have the ...
The ethane dimethanesulfonate-induced decrease in the fertilizing ability of cauda epididymal sperm is independent of the testis
Epididymis sperm maturation in utero insemination fertilization toxicant
2009/2/12
Several decades ago it was reported that when adult male rats were exposed to a single injection of 50 mg/kg body weight ethane dimethanesulfonate (EDS) and mated with untreated females, average l...
Computer-assisted semen analysis（CASA）of epididymal sperm from the domestic cat
Computer-assisted semen analysis domestic cat normozoospermia teratozoospermia sperm morphology
2009/2/11
Motion characteristics of epididymal sperm from domestic cats exhibiting a high (> 60%; normozoospermic; n = 21) or low (< 40%; teratozoospermic; n = 6) occurrence of structurally normal spermatozoa...
Long-term effects of triptolide on spermatogenesis, epididymal sperm function, and fertility in male rats
spermatogenesis epididymal sperm function fertility male rats
2008/12/25
Prior studies had suggested that triptolide, a diterpene triepoxide isolated from a Chinese medicinal plant, might be an attractive candidate as a post-testicular male contraceptive agent. Despite the...
Posttesticular antifertility action of triptolide in the male rat: evidence for severe impairment of cauda epididymal sperm ultrastructure
Posttesticular antifertility action triptolide male rat sperm ultrastructure
2008/12/25
A variety of active diterpene epoxides, including the triptolide (isolated from Tripterygium wilfordii) have been reported to cause infertility in male rats. Previously, we showed that oral admini...
Induction of Oxidative Stress by Organic Hydroperoxides in Testis and Epididymal Sperm of Rats In Vivo
Rat testis lipid peroxidation ROS levels antioxidant defenses DNA damage
2008/12/24
The present study describes the extent and pattern of oxidative stress induction in testis and epididymal sperm of rats following in vivo exposure to repeated sublethal doses of 2 model pro-oxidant...
Functional Significance of the Sperm Head Morphometric Size and Shape for Determining Freezability in Iberian Red Deer（Cervus elaphus hispanicus）Epididymal Sperm Samples
cryopreservation morphology postmortem recovery
2008/12/24
In the present study, computer-automated sperm head morphometry of epididymal samples was used to determine if sperm head area and shape are useful measurements for separating "good" and "bad" Ib...
Evaluation of ICSI-Selected Epididymal Sperm Samples of Obstructive Azoospermic Males by the CKIA System
Sperm selection sperm normality chromatin condensation DNA stainability
2008/12/22
The objective of this study was to evaluate nuclear normality in intracytoplasmic sperm injection (ICSI)-selected epididymal sperm from obstructive azoospermic (OA) patients. We evaluated whether th...
Binding of Protein D/E to the Surface of Rat Epididymal Sperm Before Ejaculation and After Deposition in the Female Reproductive Tract
Epididymal secretory protein interaction sperm plasma membrane
2008/12/5
The objectives of the present investigation were to study the interaction of protein D/E with the surface of rat epididymal spermatozoa and to assess its topology on the spermatozoa surface before a...