Arginine vasopressin stimulation of prostaglandin F2 alpha release in heifers during the estrous cycle.
Domest Anim Endocrinol
; 7(2): 173-80, 1990 Apr.
Article
em En
| MEDLINE
| ID: mdl-2369819
ABSTRACT
The effect of arginine vasopressin on the stimulation of prostaglandin F2 alpha (PGF2 alpha) release has been examined in vivo. Fifty-eight heifers received one intravenous injection of 10 IU arginine vasopressin on either Day 0 (n = 14), Day 6 (n = 12), Day 13 (n = 14) and Day 18 or 19 or 20 (Day 18-20, n = 18) after the onset of oestrus (Day 0) to determine the effect of arginine vasopressin at different times of the oestrous cycle. Frequent blood samples were taken before and after arginine vasopressin injection for the measurement of 13,14-dihydro-15-keto-PGF2 alpha (PGFM) by radioimmunoassay (RIA). Blood samples for progesterone determinations were taken 2 hr before and 24 hr after arginine vasopressin to monitor luteal function. The data show that arginine vasopressin causes an increase (P less than 0.005) in PGFM concentrations only at Day 18-20 of the cycle in 67% of the experimental heifers.
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Base de dados:
MEDLINE
Assunto principal:
Estro
/
Arginina Vasopressina
/
Bovinos
/
Dinoprosta
Limite:
Animals
Idioma:
En
Ano de publicação:
1990
Tipo de documento:
Article