Prostaglandin E(2) levels in uterine tissues and its relationship with uterine and luteal progesterone during the estrous cycle in dairy cows.

Prostaglandin E(2) levels in uterine tissues and its relationship with uterine and luteal progesterone during the estrous cycle in dairy cows. Research Abstract Details 

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Prostaglandin E(2) levels in uterine tissues and its relationship with uterine and luteal progesterone during the estrous cycle in dairy cows. Abstract Text:

W A Cerbito,A Miyamoto,C R Balagapo,N G Natural,K Miyazawa,K Sato,

Endometrial tissue homogenates obtained at luteal and follicular stages of the estrous cycle were determined for prostaglandin E(2) and progesterone contents by EIA and RIA, respectively. In Experiment 1, the concentrations and changes of PGE(2) in uterine tissues collected by biopsy before slaughfter and subsequent samples collected at 30, 60 and 90 min after slaughter were measured. No significant differences were observed in the concentration of PGE(2) preslaughter or at 30 and 60 min post slaughter. However, there was a significant decrease (P<0.01) in PGE(2) concentration 90 min post slaughter. In Experiment 2, the concentrations of PGE(2) in the ipsilateral and contralateral horns in relation to corpus luteum function were compared. A significant (P<0.05) interaction was found between stages of estrous cycle (luteal vs follicular) based on CL progesterone content, and type of uterine horn (ipsilateral vs contralateral) on uterine PGE(2) levels. The PGE(2) concentration was significantly higher (P<0.01) at luteal phase than at follicular phase. During the luteal phase PGE(2) concentrations in tissues of the uterine horn ipsilateral to the corpus luteum was significantly higher (P<0.01) than the contralateral horn. The PGE(2) concentration was low and did not differ significantly between horns during follicular phase. A parallel increase (luteal: high) and decrease (follicular: low) in PGE(2) and progesterone concentrations were observed. Correlations were observed for CL progesterone and uterine PGE(2) concentrations as well as for PGE(2) and progesterone concentrations in uterine tissues (r=0.70 and r=0.60, respectively). The results show that the increase in PGE(2) concentrations in uterine tissues coincides with the high uterine progesterone concentrations during luteal phase.

Prostaglandin E(2) levels in uterine tissues and its relationship with uterine and luteal progesterone during the estrous cycle in dairy cows. Publishing Authors By Initials

WA Cerbito,A Miyamoto,CR Balagapo,NG Natural,K Miyazawa,K Sato,

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Prostaglandin E(2) levels in uterine tissues and its relationship with uterine and luteal progesterone during the estrous cycle in dairy cows. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 42

Page Numbers: 941-50

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 1

MONTH: Nov

YEAR: 1994

Prostaglandin E(2) levels in uterine tissues and its relationship with uterine and luteal progesterone during the estrous cycle in dairy cows. Information

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LANGUAGE: eng

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AFFILIATION: Department of Theriogenology Obihiro University of Agriculture and Veterinary Medicine, Obihiro City, Hokkaido, Japan.

Country: United States

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MEDLINETA: Theriogenology

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