Negative feedback control of LH by testosterone: a quantitative study in male rats. Damassa DA, Kobashigawa D, Smith ER, Davidson JM. Adult male rats were castrated and implanted sc with testosterone (T)-filled Silastic capsules of different sizes which produce stable plasma T levels proportional to capsule length.
Negative Feedback Control of Gonadotropins in Male Rhesus Monkeys: Effects of Time After Castration and Interactions of Testosterone and Estradiol-17β The Effects of Castration and Treatment with Testosterone on the Biliary Excretion of [ 3 H] Aldosterone in Rats
Request PDF on ResearchGate | Negative Feedback Control of LH by Testosterone: A Quantitative Study in Male Rats1 1 | Adult male rats were castrated and implanted sc with testosterone (T)-filled
Intravenous injection of tritiated testosterone (18 μCi/100 g b.wt) revealed a significantly longer half-life (12.4 vs 8.9; P < 0.05) in the starved rat. The ratio [3 H]-DHT/[3 H]-T in plasma at various times after injection was not significantly different in starved and control animals. The results indicate that the increased sensitivity of the T-LH feedback reported earlier  cannot be explained by a greater …
Previous research has indicated that endogenous opioids participate in the regulation of activity in the hypothalamic-pituitary-luteinizing hormone (LH) axis and mediate the negative feedback control exerted by testosterone.
testosterone feedback can account forthe gross served between intactand castratedsheep.male differences inFSHob-Introduction generallyis It accepted that hypothalamicone releasing hormone, gonadotrophic hormone releasing hormone, stimulatestherelease ofboth andLH FSH inthe ram (Lincoln,1979). How¬ ever,feedbackmechanisms whichmodulatethe secretion of andLH FSH may differ.
They have two negative feedback mechanisms control sex hormones instead of one. Testosterone regulates blood levels of GnRH, FSH, and LH through inhibitory effects …
After 5 days of starvation, the body weight of adult male Wistar rats was on the average 34% lower than that of control animals. Luteinizing hormone (LH) and testosterone in plasma were
Without this hormone, LH and FSH will no longer be released. Without these two pituitary hormones, the Leydig cells will not be stimulated and testosterone production will decrease. This entire process is known as a negative feedback loop. Blood Test. A blood test is an easy way to assess blood levels of testosterone.
bio psyc chp. 11. STUDY. PLAY. females chromosomes. XX. Male chromosomes. XY. sudden urge in the release of luteinizing hormone. The hormones of LH, FSH, and estradiol reach a peak. the pituitary land does not receive negative feedback signals and therefore continues stimulating the adrenal gland. The adrenal gland then produces large
Negative Feedback Control of LH by Testosterone: A Quantitative Study in Male Rats1 DAVID A. DAMASSA , DON KOBASHIGAWA , ERLA R. SMITH , and JULIAN M. …
Damassa DA, Kobashigawa D, Smith ER, Davidson JM 1976 Negative feedback control of LH by testosterone: a quantitative study in male rats. Endocrinology 99: 736 –742 Abstract , Medline 4.
Published in: Endocrinology · 1998Authors: V A Tobin · Benedict J CannyAffiliation: Monash University Clayton CampusAbout: Metabolism · Gonadotropin · Calcium · Pituitary gland · Estradiol benzoate · Prostate
Negative feedback control of LH secretion by testosterone: a quantitative study in male rats Damassa, Damassa; Kobashigawa, Kobashigawa; Smith, Smith; Davidson, Davidson An analysis of the negative feedback control of gonadotropin secretion utilizing chronic implantation of ovarian steroids in ovariectomized rhesus monkeys
Published in: Journal of Neuroendocrinology · 1989Authors: Elisa Devorshakharvey · Antonella Bonagallo · Robert V GalloAffiliation: University of ConnecticutAbout: Luteinizing hormone · Pulsatile flow · Pregnancy