منابع مشابه
Possible dual roles for prostacyclin in human pregnancy and labor.
During pregnancy, the muscular layer of the uterine wall known as the myometrium, which is composed mainly of smooth muscle cells, is maintained in a state of relative quiescence. A switch from myometrial quiescence to myometrial activation is required to establish uterine contractions during labor. Researchers have long been perplexed by the fact that the major prostaglandin produced by the ut...
متن کاملPlasma thromboxane and prostacyclin: comparison during normal pregnancy and pregnancy complicated by hypertension.
Plasma levels of thromboxane B2 (TXB2) and 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha), stable metabolites of two prostanoids with opposing biological effects, TXA2 and prostacyclin, were measured by radioimmunoassay in normal pregnancy (controls) and pregnancy complicated by hypertension (PIH) from 32 to 36 (Period 1; P1) and from 36 to 40 (Period 2; P2) weeks of gestation. The plasma co...
متن کاملMolecular mechanisms regulating the vascular prostacyclin pathways and their adaptation during pregnancy and in the newborn.
Prostacyclin (PGI(2)) is a member of the prostanoid group of eicosanoids that regulate homeostasis, hemostasis, smooth muscle function and inflammation. Prostanoids are derived from arachidonic acid by the sequential actions of phospholipase A(2), cyclooxygenase (COX), and specific prostaglandin (PG) synthases. There are two major COX enzymes, COX1 and COX2, that differ in structure, tissue dis...
متن کاملProstacyclin, thromboxane and glomerular filtration rate are abnormal in sickle cell pregnancy
BACKGROUND Pregnancy increases the risk of morbidity and mortality in sickle cell disease. We previously showed pregnant women with sickle cell disease to have a relatively low plasma renin concentration in late pregnancy, associated with a lack of the expected plasma volume expansion. We hypothesized this to be due to increased systemic vascular resistance through an imbalance between the vaso...
متن کاملEndothelium-derived prostacyclin: effect of serum from women with normal and hypertensive pregnancy.
1. Pregnancy-induced hypertension (or pre-eclampsia) is characterized by vasoconstriction, platelet aggregation and altered capillary permeability, implying disordered endothelial function and/or structure. Serum from women with pregnancy-induced hypertension has been reported by others to be cytotoxic to endothelial cells in vitro. We hypothesized that such serum contains a factor that limits ...
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ژورنال
عنوان ژورنال: BMJ
سال: 1980
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.280.6231.1581