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Ultrastructural studies on the development of the blood-epididymis barrier in immature rats
Ultrastructural studies blood-epididymis barrier immature rats
2009/2/23
The development of the blood-epididymis barrier in immature rats (8, 11, 14, 18, and 21 days old) was examined with an electron microscope using lanthanum nitrate as an electron dense tracer. A grad...
Effect of germ cells on vectorial secretion of androgen binding protein and transferrin by immature rat Sertoli cells in vitro
germ cells vectorial secretion androgen binding protein transferrin immature rat Sertoli cells
2009/2/23
The influence of germ cells (greater than 85% pachytene spermatocytes) on vectorial secretion of androgen binding protein (ABP) and transferrin by immature rat Sertoli cells was investigated using t...
Cholinergic inhibition of cAMP accumulation in Sertoli cells cultured from immature hamsters
Sertoli cell cAMP muscarinic receptors FSH hamsters testis
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...
Modification of Sertoli Cell Responsiveness to FSH by Cryptorchidism and Hypophysectomy in Immature and Adult Rats
rat cryptorchidy hypophysectomy cAMP Sertoli cell
2009/2/19
Cryptorchid or hypophysectomized rats were used as models to examine the possible relationships between germ cell development and gonadotropins in the agerelated decline in the responsiveness of t...
Impact of Pulsatile Administration of Gonadotropin-Releasing Hormone on the Pituitary-Testicular Axis of the Immature Rat
pulsatile gonadotropin-releasing hormone administration luteinizing hormone androgens
2009/2/19
Effects of administering low doses of GnRH (30 ng/100 g body weight) at various frequencies on the pituitary-testicular axis were investigated. During a 6-hour treatment period, GnRH was administe...
The Regulation of Gonadotrophin Secretion in Immature Ethanol-Treated Male Rats
ethanol puberty gonadotrophin regulation LH
2009/2/19
Exposure of immature male rats to 5% (w/v) ethanol as the sole drinking fluid from weaning age (21 days of age) resulted in a delay in balanopreputial separation (41.3 ± 1.4 days versus 37.6 ± 2.0 d...
Preparation of Epithelial and Stromal Cell Fractions from Immature Rat Prostatic Tissue Using Percoll Gradients
prostate androgens testosterone
2009/2/19
A method is described for the dispersion, isolation, and partial characterization of epithelial and stromal tissue cells from the rat ventral prostate. Viable epithelial and stromal cells have bee...
In Vivo and In Vitro Investigation of the Extrapituitary Antireproductive Effects of a Potent LHRH Agonist in Immature and Adult Male Rats
LHRH agonist extrapituitary reproductive effects age-dependency hypophysectomy
2009/2/19
Co-incubation with a potent LHRH agonist, D-Ala6-Des-Gly10-Pro9-NHEt-LHRH (Wy-18,481), did not affect testosterone or progesterone production by adult intact rat testes in vitro. Prior administrat...
Follicle-stimulating hormone and testosterone stimulation of immature and mature Sertoli cells in vitro：inhibin and N-cadherin levels and round spermatid binding
Follicle-stimulating hormone testosterone stimulation immature mature Sertoli cells
2009/2/18
The in vitro response of Sertoli cells isolated from adult rat testes to testosterone (T) and follicle-stimulating hormone (FSH) treatment was investigated. Sertoli cells from >70-day-old Sprague-...
Sodium chlorate induces undersulfation of cellular proteoglycans and increases in FSH-stimulated estradiol production in immature rat Sertoli cells
Sodium chlorate cellular proteoglycans FSH-stimulated estradiol production immature rat Sertoli cells
2009/2/18
The functional influence of cell proteoglycan (PG) undersulfation on estradiol synthesis by immature rat Sertoli cell cultures was investigated by using sodium chlorate, an inhibitor of the active s...
Hormonal regulation of inhibin B secretion by immature rat sertoli cells in vitro：possible use as a bioassay for estrogen detection
Male reproduction estrogens
2009/2/18
The influences of follicle-stimulating hormone (FSH), gonadal steroids, and culture time were studied in relation to inhibin B production by Sertoli cells of immature rats cultured in vitro. Serto...
Impaired germ cell development in the testes of immature rats with neonatal hypothyroidism
Gonocyte Sertoli cell thyroid hormone stereology optical disector germ cell number
2009/2/17
The induction of neonatal hypothyroidism from day 1 to day 25 postpartum using 6-propyl-2-thiouracil (PTU) resulted in a 45% and 77% reduction of testis weight on days 20 and 30, respectively, and a...
Pituitary control of proliferation and differentiation of Leydig cells and their putative precursors in immature hypophysectomized rat testis
Testis rat development Leydig cells steroidogenesis
2009/2/17
The objective of this study was to determine the effects of pituitary hormones (luteinizing hormone [LH], follicle-stimulating hormone [FSH], growth hormone [GH], and prolactin [PRL]) on interstit...
Effect of chloroquine on the formation of tight junctions in cultured immature rat Sertoli cells
Sertoli cells TEA chloroquine
2009/2/16
Adjoining immature Sertoli cells in the seminiferous epithelium form a tight junctional complex leading to the development of the blood-testis barrier. Protease and antiprotease activities have been...
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
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...