Prostaglandin Metabolism in the Ovine Corpus Luteum: Catabolism of Prostaglandin F2α (PGF2α) Coincides with Resistance of the Corpus Luteum to PGF2α1
Prostaglandin Metabolism in the Ovine Corpus Luteum: Catabolism of Prostaglandin F2α (PGF2α) Coincides with Resistance of the Corpus Luteum to PGF2α1
复制标题
绵羊黄体中的前列腺素代谢:前列腺素 F2α (PGF2α) 的分解代谢与黄体对 PGF2α1 的抵抗一致
DOI:
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
G. Niswender
中科院分区:
文献类型:
--
作者:
P. Silva;J. Juengel;M. K. Rollyson;G. Niswender
Abstract To examine possible mechanisms involved in resistance of the ovine corpus luteum to the luteolytic activity of prostaglandin (PG)F2α, the enzymatic activity of 15-hydroxyprostaglandin dehydrogenase (PGDH) and the quantity of mRNA encoding PGDH and cyclooxygenase (COX-2) were determined in ovine corpora lutea on Days 4 and 13 of the estrous cycle and Day 13 of pregnancy. The corpus luteum is resistant to the action of PGF2α on Days 4 of the estrous cycle and 13 of pregnancy while on Day 13 of the estrous cycle the corpus luteum is sensitive to the actions PGF2α. Enzymatic activity of PGDH, measured by rate of conversion of PGF2α to PGFM, was greater in corpora lutea on Day 4 of the estrous cycle (P < 0.05) and Day 13 of pregnancy (P < 0.05) than on Day 13 of the estrous cycle. Levels of mRNA encoding PGDH were also greater in corpora lutea on Day 4 of the estrous cycle (P < 0.01) and Day 13 of pregnancy (P < 0.01) than on Day 13 of the estrous cycle. Thus, during the early estrous cycle and early pregnancy, the corpus luteum has a greater capacity to catabolize PGF, which may play a role in the resistance of the corpus luteum to the actions of this hormone. Levels of mRNA encoding COX-2 were undetectable in corpora lutea collected on Day 13 of the estrous cycle but were 11 ± 4 and 44 ± 28 amol/μg poly(A)+ RNA in corpora lutea collected on Day 4 of the estrous cycle and Day 13 of pregnancy, respectively. These data suggest that there is a greater capacity to synthesize PGF2α, early in the estrous cycle and early in pregnancy than on Day 13 of the estrous cycle. In conclusion, enzymatic activity of PGDH may play an important role in the mechanism involved in luteal resistance to the luteolytic effects of PGF2α.
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影响因子:
3.6
作者:
Tsai,SJ;Wiltbank,MC
通讯作者:
Wiltbank,MC
DOI:
10.1210/endo.137.8.8754761
发表时间:
1996
期刊:
Endocrinology.
影响因子:
--
作者:
Tsai,SJ;Wiltbank,MC;Bodensteiner,KJ
通讯作者:
Bodensteiner,KJ
DOI:
10.1530/jrf.0.1130299
发表时间:
1998
期刊:
Journal of reproduction and fertility
影响因子:
--
作者:
Juengel,JL;Melner,MH;Clapper,JA;Turzillo,AM;Moss,GE;Nett,TM;Niswender,GD
通讯作者:
Niswender,GD
影响因子:
3.6
作者:
Tsai,SJ;Wiltbank,MC
通讯作者:
Wiltbank,MC
DOI:
10.3109/10409239609106581
发表时间:
1996-04
影响因子:
6.5
作者:
R T Okita;Janice Rice Okita
通讯作者:
R T Okita;Janice Rice Okita