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The presence of a motility inhibitor within spermatozoa may explain the poor sperm motility of some infertile men
motility inhibitor spermatozoa poor sperm motility infertile men
2009/2/23
The presence of motility inhibitors in seminal plasma and within spermatozoa from control and infertile men with poor sperm motility was investigated using demembranated reactivated human spermatozo...
Evidence for the presence of androgen receptors in purified rat Leydig cells
androgen receptors purified rat Leydig cells
2009/2/19
Leydig cells, purified on two sequential Percoll gradients to purities of 89 +/- 1%, were used to study the binding of 17-beta-hydroxy-17 alpha-methyl-estra-4,9,11-triene-3-one(3H-R1881). The accumu...
The Presence of Spermatozoa in the Semen of Vasectomized Men
vasectomy sperm follow-up recanalization microrecanalization sperm reappearance
2009/2/19
Repeated semen specimens were examined from 24 men who had been vasectomized for periods of time ranging from two to 31 years. Five-micron filters were used to collect the spermatozoa in each spec...
Effect of Estradiol on the Rat Prostate in the Presence and Absence of Testosterone and Pituitary
prostate rat estradiol testosterone pituitary prolactin
2009/2/19
In an attempt to elucidate the effect of estradiol on the rat prostate, four experiments were conducted. In experiment 1, rats were orchiectomized and were given subcutaneous implants of silastic ...
Presence and tyrosine phosphorylation of c-met receptor in human sperm
tyrosine phosphorylation c-met receptor human sperm
2009/2/18
The c-met receptor is a p190MET tyrosine kinase proto-oncoprotein that through its binding to its ligand, designated hepatocyte growth factor (HGF), induces mitogenic, motogenic, and morphogenic act...
Presence and modulation of interleukin-12 in seminal plasma of fertile and infertile men
Cytokines interleukins infertility semen
2009/2/17
Interleukin-12 (IL-12) is a unique cytokine that recently has drawn considerable attention because of its immunomodulatory properties and its possible involvement in several normal physiological a...
Mammalian sperm DNA susceptibility to in situ denaturation associated with the presence of DNA strand breaks as measured by the terminal deoxynucleotidyl transferase assay
Acrldine orange chromatin structure SCSA TdTA
2009/2/13
Sperm from four mammalian species were analyzed by the sperm chromatin structure assay (SCSA) and the terminal deoxynucleotidyl transferase assay (TdTA) using flow cytometry. The SCSA quantitates the ...
2,5-hexanedione exposure in the rat results in long-term testicular atrophy despite the presence of residual spermatogonia
Germ cell repopulation Sertoli cell toxicity spermatogonia
2009/2/7
Charles River CD rats (approximate weight, 208 g) were exposed to 1.0% 2,5-hexanedione (2,5-HD) in drinking water for 5 weeks. Rats were killed 27, 60, and 75 weeks after exposure to evaluate the re...
Effects of short-term stimulation of serotoninergic pathways on the pulsatile secretion of luteinizing hormone in the absence and presence of acute opiate-receptor blockage
pulsatile gonadotropin secretion serotonin
2009/2/6
To investigate the role of the serotoninergic system in regulating pulsatile gonadotropin secretion in man, we tested the influences of a novel selective serotonin re-uptake inhibitor (fluoxetine HC...
Presence of NMDA receptor subunits in the male lower urogenital tract
NMDA receptor subunits male lower urogenital tract
2008/12/25
Some sexual responses in the male rat, specifically penile erection, are controlled by neural circuits in the brain and spine that are stimulated by the binding of excitatory amino acids (EAAs) to...
Late Hormonal Levels, Semen Parameters, and Presence of Antisperm Antibodies in Patients Treated for Testicular Torsion
Infertility function testis
2008/12/24
In spite of prompt diagnosis and either orchiectomy or preservation of the affected testis, infertility remains a significant sequel to testicular torsion. The objective of this study was to e...
Sperm Characteristics and DNA Integrity of Iberian Red Deer（Cervus elaphus hispanicus）Epididymal Spermatozoa Frozen in the Presence of Enzymatic and Nonenzymatic Antioxidants
Cryopreservation fertilization gamete biology reproductive technology
2008/12/24
The main goal of this study was to investigate the potential protective effects of enzymatic and nonenzymatic antioxidants on cryopreservation injuries to red deer epididymal spermatozoa. In Expe...
Testicular Torsion Alters the Presence of Specific Proteins in the Mouse Testis as Well as the Phosphorylation Status of Specific Proteins
Oxidative stress testicular proteins
2008/12/23
Testicular torsion followed by torsion repair induces an ischemia-reperfusion injury to the testis that can render the testis aspermatogenic. Previous results have demonstrated this loss of sp...
Vasectomy Reversal in the Presence of Diminished Ovarian Reserve：A Complex Clinical Conundrum
Vasectomy Reversal Diminished Ovarian Reserve Clinical Conundrum
2008/12/23
Clinical reproductive practice is often multivariate: multiple conditions in the male and/or female may coexist to confound diagnoses and therapeutic strategies. Given that treatment of an underlyin...
Use of Electroejaculation in the Presence of Anal Stenosis
Electroejaculation Presence Anal Stenosis
2008/12/23
Dr Samuel Thompson poses a question regarding the use of electroejaculation in the management of an azoospermic patient who has anal stenonsis secondary to imperforate anus which was repaired as a neo...