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Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep.

Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep. Research Abstract Details 

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  • Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep. Abstract Text:

    j r malayerJ R Malayer,p j hansenP J Hansen,

    The objectives of this study were to determine the secretion patterns of prostaglandins (PG) and protein during mid- (Day 100) and late- (Day 140) pregnancy in the ewe and to ascertain whether that pattern is altered by in vitro heat shock. Explant cultures were prepared from intercaruncular endometrium, caruncular endometrium, fetal cotyledon and interplacentomal placenta. Cultures were incubated at 39 or 42 degrees C for 18 h in the presence of arachidonic acid or L-[4,5(3)H]leucine. There were no effects of day of gestation or consistent effects of temperature upon de novo synthesis of tissue and secretory protein. Elevated temperature generally depressed PGE(2) secretion by maternal tissues and PGF secretion by caruncular endometrium but had little effect on PGE(2) release by fetal tissues or on PGF release by intercaruncular endometrium or fetal tissues. Day of gestation by tissue type interactions were found for PGF and PGE(2) release. At Day 100, maternal tissues secreted more PGF and PGE(2) than fetal tissues; at Day 140, PG secretion from fetal tissues was greater than at Day 100, and fetal PGE(2) release exceeded release from maternal tissues. Tissue proteins resolved by SDS-PAGE revealed the appearance in heat-shocked tissue of 93 and 72 kDa heat-shock proteins. In conclusion, elevated temperature depressed PGE(2) release, particularly from maternal tissues. Changes in PGE(2) suggest that the increase in utero-placental PGE(2) with increasing gestational age is due to changes in secretion of the fetal placenta.

    Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep. Publishing Authors By Initials

    jr malayerJR Malayer,pj hansenPJ Hansen,

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    Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep. Journal Published:

    PUBLICATION TYPE: Journal Article

    Journal: Theriogenology

    VOLUME: 34

    Page Numbers: 231-49

    Journal Abbreviation: Theriogenology

    ISSN: 0093-691X

    DAY: 26

    MONTH: Aug

    YEAR: 1990

    Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep. Information

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    LANGUAGE: eng

    NlmUniqueID: 421510

    Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep. Keywords Mesh Terms:

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    Grant and Affiliation Information for Effect of in vitro heat shock upon the synthesis and secretion of prostaglandins and protein by uterine and placental tissues of the sheep.

    AFFILIATION: Dairy Science Department University of Florida, Gainesville, FL 32611-0701 USA.

    Country: United States

    United States Research PublicationUnited States Research Publication

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    MEDLINETA: Theriogenology

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