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Publikováno v:
Journal of Endocrinology. 204:67-74
Previous studies have reported the roles of Ca2+ in steroidogenesis. The present study has investigated an inhibitory effect of Ca2+ influx through L-type Ca2+ channels on gene expression of steroidogenic acute regulatory (STAR) protein that regulate
Autor:
Gilles Charpigny, Laetitia Clément, Fabienne Nuttinck, Pierrette Reinaud, Brigitte Marquant-Le Guienne, Bénédicte Grimard
Publikováno v:
Reproduction-Cambridge-Supplement
Reproduction-Cambridge-Supplement-, Society for Reproduction and Fertility, 2008, 135 (5), pp.593-603. ⟨10.1530/REP-07-0453⟩
Reproduction-Cambridge-Supplement-, Society for Reproduction and Fertility, 2008, 135 (5), pp.593-603. ⟨10.1530/REP-07-0453⟩
Prostaglandin E2(PGE2) and progesterone appear to be critical mediators of cumulus expansion and the resumption of oocyte meiosis. The aim of this study was to identify the types of prostaglandin E synthase (PTGES) expressed in the bovine cumulus–o
Autor:
Douglas M. Stocco, Jau-Jiin Chen, Randolph B. Schiffer, XingJia Wang, Kuladip Jana, Akhilesh K. Pandey, Xiangling Yin, Paula Grammas
Publikováno v:
Journal of Endocrinology. 197:315-323
During the aging process of males, testosterone biosynthesis declines in testicular Leydig cells resulting in decreases in various physiological functions. To explore the possibility of delaying the decline using food supplements, we have studied ste
Publikováno v:
Reproduction. 116:315-320
Recent evidence indicates that, in mares, as in the domestic ruminants, oxytocin and its endometrial receptor play important roles in stimulating the pulsatile releases of prostaglandin F2 alpha from the endometrium that effect luteolysis. In the pre
Publikováno v:
Journal of Endocrinology. 157:405-414
The synthesis and secretion of progesterone in the corpus luteum are regulated by both endocrine and paracrine/ autocrine factors which affect the steroidogenic cells. Evidence suggests that these cells communicate via cell-cell junctional proteins,
Autor:
S M Feng, G W Almond
Publikováno v:
Reproduction. 113:83-89
The present study examined the effects of LH, prostaglandin E2 (PGE2), 8-bromo-cyclic AMP (cAMP) and forskolin on progesterone secretion by small and large pig luteal cells. Corpora lutea were isolated from gilts (n > or = 3 per day) on days 9, 12 an
Autor:
Sandra J. Downing, M. Hollingsworth
Publikováno v:
Reproduction. 99:121-129
The influence of oestradiol benzoate and progesterone treatment and of tolerance to relaxin on the uptake of 125I-labelled porcine relaxin by reproductive tissues was investigated in anaesthetized female rats. In ovary-intact rats, 125I-labelled rela
Autor:
M. Hollingsworth, Sandra J. Downing
Publikováno v:
Journal of Endocrinology. 135:17-28
The influence of oestradiol benzoate and progesterone on uterine sensitivity and development of tolerance to relaxin was investigated in bilaterally ovariectomized non-pregnant rats in vivo. Bolus doses of relaxin (2–20 μg/kg i.v.) produced rapid
Publikováno v:
Reproduction. 96:103-115
The effect of insulin-like growth factors (IGFs) and insulin on the release of progesterone and oxytocin from bovine corpus luteum was investigated at early (days 5-7), mid- (days 8-12) and late (days 15-18) luteal phases of the oestrous cycle in an
Publikováno v:
Reproduction. 94:121-128
After parturition, eight sows were zero weaned by removing all piglets 6 h after birth; a further 18 sows suckled at least ten piglets each. Blood samples were collected on Day 4 after zero weaning or on Days 4, 14 and 21 of lactation and the samplin