Neuromediator bioamines in the histogenesis of corpora lutea

Comparison of induced corpora lutea from prepuberal gilts and spontaneous corpora lutea from mature gilts: in vitro progesterone production.

Prepuberal (P) gilts were induced to ovulate with pregnant mare serum gonadotropin followed 72 h later by human chorionic gonadotropin (hCG). Three P gilts and three mature (M) gilts each were ovariectomized on d 10, 14, 18, 22 and 26 (d 0 = day of hCG for P gilts and onset of estrus for M gilts). Gilts ovariectomized on d 14, 18, 22 and 26 were hysterectomized on d 6 to ensure maintenance of t...

Lipid metabolism in regressing rat corpora lutea of pregnancy.

Lipid accumulation is a hallmark of corpus luteum regression and we characterized lipids stored in rat corpora lutea of pregnancy between days 21 and 24 post coitum, the period of luteolysis. A 10-fold rise in lutein triglyceride concentrations occurred between days 21 and 24, which represented the major alteration in luteal lipid metabolism during luteolysis, coinciding with the appearance of ...

In vitro synthesis of progesterone by swine corpora lutea.

Formation and maintenance of corpora lutea in laboratory animals.

T HE past decade has witnessed a revival of interest in the mammalian corpus luteum. The availability of new techniques is in part responsible but a more important factor has been the increasing use of cows, sheep, pigs and even women as experimental species. The use of these mammals has uncovered, to a much greater degree than was expected, a diversity in the physiology of the corpus luteum, a...

Hormonal regulation of connexin-43 in baboon corpora lutea.

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, the connexins. Previously we have shown that connexin-43 is expressed in both human and baboon (Papio hamadryus anubis) corpora lutea, with differe...