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Titolo:
Sustained but not repeated acute elevation of cortisol impaired the luteinizing hormone surge, estrus, and ovulation in gilts
Autore:
Turner, AI; Hemsworth, PH; Canny, BJ; Tilbrook, AJ;
Indirizzi:
Monash Univ, Dept Physiol, Clayton, Vic 3168, Australia Monash Univ Clayton Vic Australia 3168 siol, Clayton, Vic 3168, Australia Victorian Anim Sci, Anim Welf Ctr, Werribee, Vic 3030, Australia VictorianAnim Sci Werribee Vic Australia 3030 ribee, Vic 3030, Australia
Titolo Testata:
BIOLOGY OF REPRODUCTION
fascicolo: 3, volume: 61, anno: 1999,
pagine: 614 - 620
SICI:
0006-3363(199909)61:3<614:SBNRAE>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
FOLLICULAR PHASE; CIRCULATING LH; ACUTE STRESS; PIGS; HYDROCORTISONE; SECRETION; ACTH; SOW; CORTICOSTEROIDS; PROLACTIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Tilbrook, AJ Monash Univ, Dept Physiol, Clayton, Vic 3168, Australia Monash Univ Clayton Vic Australia 3168 , Vic 3168, Australia
Citazione:
A.I. Turner et al., "Sustained but not repeated acute elevation of cortisol impaired the luteinizing hormone surge, estrus, and ovulation in gilts", BIOL REPROD, 61(3), 1999, pp. 614-620

Abstract

We tested the hypothesis that sustained and repeated acute elevation of cortisol would impair the LH surge, estrus, and ovulation in gifts. Cortisol was injected intramuscularly, to achieve a sustained elevation of plasma concentrations of cortisol, or intravenously, to achieve an acute elevation of plasma concentrations of cortisol. Control gilts received i.m. injectionsof oil and i.v. injections of saline. These treatments were administered to gifts (n = 6 per treatment) at 12-h intervals from Days 7 to 11 of the estrous cycle until after estrus ceased or until Day 27 or 28 of the estrous cycle, whichever came first. The repeated acute elevation of cortisol had no effect on the LH surge, estrus, or ovulation, In contrast, when the elevation of cortisol was sustained, the LH surge, estrus, and ovulation were inhibited. We conclude that cortisol is capable of direct actions to impair reproductive processes in female pigs but that plasma concentrations of cortisol need to be elevated for a substantial period for this to occur.

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Documento generato il 24/09/20 alle ore 02:11:52