Results 171 to 180 of about 7,523 (208)

Luteolysis: A Neuroendocrine-Mediated Event

Physiological Reviews, 1999
In many nonprimate mammalian species, cyclical regression of the corpus luteum (luteolysis) is caused by the episodic pulsatile secretion of uterine PGF2α, which acts either locally on the corpus luteum by a countercurrent mechanism or, in some species, via the systemic circulation.
J A, McCracken, E E, Custer, J C, Lamsa
openaire   +2 more sources

Hormonal changes around bovine luteolysis

Prostaglandins, 1975
Plasma concentrations of estradiol-17beta, progesterone, LH and 13, 14-dihydro-15-keto-PGF2alpha were determined by radioimmunoassay on 2-hourly samples obtained around luteolysis and estrus in three dairy cows. The decline in progesterone occurred before the preestrous rise in estrogen and no pre-estrous peak of progesterone could be detected.
A J, Peterson, R J, Fairclough, E, Payne, J F, Smith   +3 more
openaire   +2 more sources

Luteolysis in early diestrous beagle bitches

Theriogenology, 1988
To induce luteolysis early in diestrus, 15 mated beagles were treated with 250 microg/kg prostaglandin F2alpha (PG), administered subcutaneously twice daily for 4 d, from Day 5 to Day 8 after the onset of cytological diestrus. They were divided into three groups of five bitches each: Group 1 received PG only.
E E, Oettle, H J, Bertschinger, A E, Botha, A, Marais   +3 more
openaire   +2 more sources

Luteolysis in Mares After Endometrial Biopsy

American Journal of Veterinary Research, 1981
SUMMARY The length of diestrus was not changed in 4 mares by taking endometrial biopsy specimens during estrus. In contrast, taking endometrial biopsy specimens on postovulation day 4 induced premature luteolysis and significantly (P < 0.05) reduced the length of diestrus.
C B, Baker, D I, Newton, E C, Mather, W D, Oxender   +3 more
openaire   +2 more sources

Perforin Expression in Human Cell-Mediated Luteolysis

International Journal of Gynecological Pathology, 1995
After ovulation and in the absence of fertilization, the human corpus luteum regresses in an orderly sequence of morphological changes. This study demonstrated that luteal regression involved progressive infiltration of lymphocytes and macrophages.
A, Hameed, W M, Fox, R J, Kurman, R H, Hruban, E R, Podack   +4 more
openaire   +2 more sources

Between prepartum luteolysis and onset of expulsion

Domestic Animal Endocrinology, 2002
In the cow the foetal endocrine signals that initiate the calving process result in prepartum luteolysis. Withdrawal of progesterone (P4) action is a prerequisite for a normal calving. The rather abrupt declining influence of P4 is followed by a cascade of physiological processes in the myometrium and cervix.
Taverne, M.A.M., Breeveld-Dwarkasing, V.N.A., van Dissel-Emiliani, F.M.F., Bevers, M.M., de Jong, R., van der Weijden, G.C.   +5 more
openaire   +3 more sources

Cellular components involved in luteolysis

Journal of Animal Science, 1994
In the domestic species, regression of the corpus luteum is dependent on uterine release of prostaglandin (PG)F2 alpha. Despite the central role of PGF2 alpha in luteolysis, very little is known about the actual mechanism of prostaglandin-induced regression at the level of the luteal cell.
openaire   +2 more sources

Monocyte chemoattractant protein 1 in luteolysis

Reviews of Reproduction, 2000
Monocyte chemoattractant protein 1 (MCP-1) is a member of the chemokine family of cytokines which are involved in leukocyte physiology and trafficking. Interest in the role of inflammatory cells and their cytokine products in luteolysis has been increasing and there is mounting evidence demonstrating that MCP-1 is involved in luteolysis.
openaire   +2 more sources

Prostaglandins and post-abortion luteolysis in early pregnancy

Prostaglandins, 1975
This study was undertaken to determine if post-abortion luteolysis in early pregnancy could be accelerated by the administration of 15(S)15-methyl-PGF2alpha(15-me-PGF2alpha) or delayed following pretreatment with indomethacin. Thirty-nine women were divided into four groups: 7 women were given 400mug 15-me-PGF2alpha extra-amniotically one hour prior to
A, Leader, M, Bygdeman, S Z, Cekan, E, Diczfalusy, R, Guerrero, J N, Martin, N, Wiqvist   +6 more
openaire   +2 more sources

Cellular Mechanisms Involved in Luteolysis

1979
Regression of the mammalian corpus luteum is commonly thought to involve autophagy (cellular self-digestion) or heterophagy (removal of cells by macrophages), or both. However, few studies have focused on these mechanisms, and their actual importance in luteolysis thus remains uncertain.
openaire   +2 more sources