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Cytochalasin D inhibits penetration of hamster eggs by guinea pig and human spermatozoa
Cytochalasin D inhibits penetration hamster eggs guinea pig human spermatozoa
2009/2/23
Fertilization experiments using zona-free hamster eggs and spermatozoa from both guinea pig and human were conducted in the presence of cytochalasin D to evaluate the possible role of actin filame...
Tonic inhibition of adenylate cyclase in cultured hamster Sertoli cells
cAMP hamster Sertoli cell adenylate cyclase culture pertussis toxin
2009/2/23
Sertoli cells cultured from immature hamsters respond to FSH with a dose-related increase in cAMP accumulation. Pertussis toxin acts synergistically with FSH to stimulate cAMP accumulation. This eff...
Inhibin production by Sertoli cells during testicular regression in the golden hamster
Inhibin production Sertoli cells testicular regression golden hamster
2009/2/23
The objective of this study was to determine if testicular regression in the hamster results in changes in Sertoli cell function that reflect altered pituitary function. Inhibin-like activity was me...
Comparison of the penetration ability of human spermatozoa into bovine cervical mucus and zona-free hamster eggs
penetration ability human spermatozoa bovine cervical mucus zona-free hamster eggs
2009/2/20
In vitro bovine cervical mucus (BCM) penetration tests, sperm penetration assays (SPA) using zona-free hamster eggs, and routine semen analyses were performed on a total of 136 freshly collected sem...
Effects of white blood cells on the in vitro penetration of zona-free hamster eggs by human spermatozoa
white blood cells zona-free hamster eggs human spermatozoa
2009/2/20
The presence of white blood cells in semen has been associated with male infertility. Previous studies indicate that pyospermia occurs in conjunction with decreases in sperm motility, number of no...
Role of the pineal in the alteration of hamster Sertoli cell responsiveness to FSH during testicular regression
pineal hamster Sertoli cells testicular regression short photoperiod optic enucleation
2009/2/20
Testicular regression was induced in adult hamsters by optic enucleation, short photoperiod, or melatonin injections. The melatonin injected group, while undergoing testicular regression, showed a q...
Comparison of glycerol and a zwitter ion buffer system as cryoprotective media for human spermatozoa. Effect on motility, penetration of zona-free hamster oocytes, and acrosin/proacrosin
spermatozoa human cryopreservation
2009/2/20
This study compared the cryoprotective effect of glycerol with that of a zwitter ion buffer system (TESTCY). Spermatozoa that are cryopreserved in the presence of glycerol possess a somewhat highe...
Improvement in the sperm penetration（hamster ova）assay（SPA）results after doxycycline treatment of infertile men
leukocytes infertility sperm penetration
2009/2/19
Thirty-two men with abnormal (less than or equal to 11% penetration) Sperm Penetration (hamster ova) Assay (SPA) results were treated with doxycycline and reevaluated by SPA and seminal fluid analys...
Transformations of Sperm Nuclei Incorporated Into Aged and Unaged Hamster Eggs
pronuclear development aged and unaged ova
2009/2/19
The extent of male pronuclear development in aged and unaged hamster eggs was examined by electron microscopy. Observations are presented demonstrating that although hamster eggs, aged 18 hours in...
The Effect of Inhibitors of Trypsin and Phospholipase A2 on the Penetration of Zona Pellucida-free Hamster Eggs by Acrosome-reacted Hamster Sperm
Trypsin Phospholipase A2 Penetration Zona Pellucida-free Hamster Eggs
2009/2/19
The involvement of a trypsin-like enzyme and a phospholipase A2 in hamster sperm-egg fusion was investigated. Previously acrosome-reacted sperm and zona pellucida-free eggs were incubated in a low...
Evidence for a Role of Post-Ovulatory Cumulus Components in Supporting Fertilizing Ability of Hamster Spermatozoa
fertilization in vitro capacitation acrosome reaction egg-cumulus complex golden hamster
2009/2/19
A completely chemically defined culture medium was used to investigate the role of egg-cumulus complex (ECC) components in supporting sperm fertilizing ability. Defined sperm motility-stimulating ...
Effects of Experimentally Induced Hyperprolactinemia on the Hypothalamus, Pituitary, and Testes in the Golden Hamster
hyperprolactinemia hypothalamus pituitary testis prolactin follicle-stimulating hormone norepinephrine testosterone dopamine luteinizing hormone releasing hormone
2009/2/19
Hyperprolactinemia was induced in adult male golden hamsters by transplantation of four homologous pituitaries under the renal capsules. The resulting elevation of plasma prolactin (PRL) levels wa...
FSH Stimulation of cAMP Accumulation in Hamster Sertoli Cells：Effect of Age and Optic Enucleation
cAMP Sertoli cells hamsters optic enucleation
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...
Nuclear Uptake and Retention of Androgen by the Accessory Organs in the Male Golden Hamster
androgens 3H-dihydrotestosterone autoradiography male accessory organs
2009/2/18
The nuclear uptake and retention of 3H-dihydrotestosterone (3H-DHT) were studied in the reproductive organs of the male hamster by autoradiography. Castrated adult male hamsters were injected with...
Effect of Vasectomy on the Osmolarity of Hamster Testicular and Epididymal Intraluminal Fluid
testis epididymis vasectomy osmolarity hamster
2009/2/18
Intraluminal fluids from the hamster seminiferous tubules and cauda, corpus, and caput epididymidis were obtained in vivo using micropuncture techniques. The effect of vasectomy on the osmolarity ...