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Endocrine parameters, hormone receptors, and functions of the testicular interstitium and seminiferous epithelium in estradiol-immunized Ile-de-France rams
gonadotropin secretion Leydig cells Sertoli cells FSH receptors androgen receptors
2009/2/23
The testicular response of Ile-de-France rams actively immunized against estradiol (E2) was evaluated during both the ovine nonbreeding season (spring) and breeding season (autumn). Plasma concentrati...
Follicle stimulating hormone, luteinizing hormone and testicular Leydig cell responses to estradiol immunization in Ile-de-France rams
Follicle stimulating hormone luteinizing hormone testicular Leydig cell estradiol immunization Ile-de-France rams
2009/2/23
Active immunization of Ile-de-France rams against estradiol (E2) resulted in the production of E2-neutralizing antibodies and an elevation in the plasma concentrations of FSH, LH, and testosterone...
Evidence that estrogen regulation of testosterone secretion in adult rams is mediated by both indirect（gonadotropin dependent）and direct（gonadotropin independent）means
estrogen regulation testosterone secretion adult rams
2009/2/23
Involvement of endogenous estrogen in the regulation of gonadotropin and testosterone secretion was investigated in adult rams. Groups of four rams were either passively immunized against estradio...
Individual differences in LH and FSH responses to orchidectomy and testosterone replacement therapy in rams
Individual differences LH FSH rams
2009/2/19
Profiles of LH and FSH levels and pituitary LH responses to exogenous luteinizing hormone releasing hormone (LHRH) have been characterized in rams, castrated rams (wethers), and wethers implanted wi...
Influence of Testicular Steroids on Thyrotropin Releasing Hormone-induced Prolactin Release in Mature Rams
testicular steroids prolactin prolactin secretion
2009/2/18
Prolactin (PRL) concentrations were measured in serum of intact rams, castrate rams, and steroid-treated castrate rams to determine whether testicular steroids influence PRL secretion in this sp...
Heterogeneity of gonadotropins and levels of uncombined luteinizing hormone subunits in pituitaries of cryptorchid rams
uncombined luteinizing hormone subunits pituitaries cryptorchid rams
2009/2/12
Pituitaries were collected from intact rams and rams that had been rendered bilaterally cryptorchid by surgery to examine the effects of cryptorchidism on gonadotropin heterogeneity, levels of uncom...
Negative feedback regulation of pulsatile LH secretion during treatment with an LHRH antagonist in rams
LHRH antagonists steriod feedback hypothalamus pituitary gland testis testosterone
2009/2/6
Suppression of LH and testosterone secretion in sexually active rams by the short-term administration of an LHRH antagonist results in a compensatory increase in the release of LHRH from the hypot...
Effect of Seminal Plasma Fractions From Entire and Vasectomized Rams on the Motility Characteristics, Membrane Status, and In Vitro Fertility of Ram Spermatozoa
Seminal Plasma Fractions Entire Vasectomized Rams Motility Characteristics Membrane Status
2008/12/24
Whole seminal plasma from ram semen collected before and after vasectomy was separated into 2 fractions, supernatant and pellet of vesicles, and their protein profiles characterized by one-dimens...