Angiogenic activity of bovine corpora lutea at several stages of luteal development

Effect of successive enucleations of bovine corpora lutea on formation and function of subsequent luteal tissue.

I T has been demonstrated that exogenous progesterone exerts a stimulatory effect on ovulation in cattle (Hansel and Trimberger, 1952) as well as an inhibitory effect (Ulberg, Christian and Casida, 1951; Trimberger and Hansel, 1955; Nellor and Cole, 1957; Labhsetwar et al., 1964). However, the role of endogenous luteal progesterone in the regulation of bovine corpus luteum formation and functio...

Effect of a specific aromatase inhibitor on oestradiol secretion by porcine corpora lutea at various stages of the luteal phase.

The present study was undertaken to investigate the aromatization capability of pig corpora lutea at different stages of the luteal phase using the nonsteroidal aromatase inhibitor CGS 16949A. Luteal cells were collected during early (0-2 days after ovulation), mid- (7-10 days after ovulation) and late (13-16 days after ovulation) luteal phase. Cells were incubated either with or without 10(-7)...

Microvascularization and angiogenic activity of equine corpora lutea throughout the estrous cycle.

Corpus luteum growth and endocrine function are closely dependent on the formation of new capillaries. The objectives of this study were to evaluate (i) tissue growth and microvascular development in the equine cyclic luteal structures; (ii) in vitro angiogenic activity of luteal tissues in response to luteotrophic (LH, PGE(2)) and luteolytic (PGF(2alpha)) hormones and (iii) to relate data to l...

The Lifespan of Corpora Lutea Induced during the Luteal Phase of the Estrous Cycle in Swine

Inducible Nitric Oxide Synthase Expression and Luteal Cell DNA Fragmentation of Porcine Cyclic Corpora Lutea*

Nitric oxide (NO) derived from inducible nitric oxide synthase (iNOS) is involved in cell apoptosis, which contributes to luteal regression and luteolysis in some species. In large domestic animals, no direct evidence for the relationship between NO and cell apoptosis in the process of corpus luteum regression is reported. The present study was conducted to investigate the localization of iNOS ...