Specific changes in the in vitro production of prostanoids by the ovine cervix at parturition.
A method of tissue superfusion has been used to measure in vitro prostanoid production by the ovine cervix during late pregnancy and at parturition. In late pregnancy (105-135 days of gestation) cervical tissue produced relatively large amounts of prostaglandin E (PGE); in comparison, the production rates of prostaglandin F (PGF), 13, 14-dihydro-15-oxo-prostaglandin F (PGFM) and 6-oxo-prostaglandin F1 alpha were generally low. Thromboxane B2 (TXB2) production was minimal and often unmeasurable. There were significant increases in the production rates of PGE and 6-oxo-PGF1 alpha by cervical tissue taken immediately after delivery, when compared to late pregnancy. Mean production rates of PGE increased from 19.8 +/- 4.1 to 43.8 +/- 7.4 ng/g. dry wt./min; 6-oxo-PGF1 alpha production rates increased more than three-fold from 10.0 +/- 2.7 to 34.6 +/- 9.8 ng/g. dry wt./min (means +/- S.E.M.). There were no significant differences in the rates of production of PGF, PGFM and TXB2 by the two groups.
D000818:Animals; D002584:Cervix Uteri / Q000378:metabolism*; D005260:Female; D066298:In Vitro Techniques; D007743:Labor, Obstetric; D010477:Perfusion; D011247:Pregnancy; D011453:Prostaglandins / Q000096:biosynthesis*; D011458:Prostaglandins E / Q000096:biosynthesis; D011460:Prostaglandins F / Q000096:biosynthesis; D012756:Sheep / Q000378:metabolism; D013929:Thromboxane B2 / Q000096:biosynthesis
D011453:Prostaglandins; D011458:Prostaglandins E; D011460:Prostaglandins F; D013929:Thromboxane B2