Характеристика плацентарного оксида азота synthase, экспрессия в преэклампсии. Преэклампсия и связанные нарушения, страница 11

AB: Nitric oxide (NO) production may be an important causal factor in hypertensive disorders during pregnancy. The plasma concentrations of NO2-(+) NO3-, stable metabolites of NO, were measured in 70 nonpregnant women, 323 normotensive pregnant women, 23 pregnant patients with preeclampsia, and 7 pregnant patients with essential hypertension. The normotensive women had higher plasma concentrations (30.0 +/- 0.6 mumol/l) than nonpregnant women (18.3 +/- 1.0 mumol/l; p < 0.0001). The plasma concentrations in the patients with preeclampsia (45.6 +/- 2.3 mumol/l) were higher than in the normotensive women (30.3 +/- 1.0 mumol/l; p < 0.0001) and were correlated with the systolic blood pressure (r = 0.442; p < 0.05). However, pregnant patients with underlying essential hypertension had significantly lower plasma concentrations (19.1 +/- 3.0 mumol/l; p < 0.005). These findings suggest that NO contributes to maternal vasodilation, the maintenance of uterine quiescence, and the pathogenesis and clinical features of hypertensive disorders during pregnancy.

: Оксид азота (NO) продукция может быть важный причинный фактор в гипертензивных нарушениях в течение беременности. Плазменные концентрации NO2-(+) NO3-, устойчивые метаболиты NO, были измерены в 70 небеременных женщинах, 323 normotensive беременные женщины, 23 беременных пациента с преэклампсией, и 7 беременными пациентами с обязательной артериальной гипертензией. normotensive женщины имели более высокие плазменные концентрации (30.0 +/-0.6 mumol/l) чем небеременные женщины (18.3 +/-1.0 mumol/l; p < 0.0001). Плазменные концентрации в пациентах с преэклампсией (45.6 +/-2.3 mumol/l) были выше чем в normotensive женщинах (30.3 +/-1.0 mumol/l; p < 0.0001) и были коррелированы с систолическим кровяным давлением (r = 0.442; p < 0.05). Однако, беременные пациенты с основной обязательной артериальной гипертензией имели значительно ниже плазменные концентрации (19.1 +/-3.0 mumol/l; p < 0.005). Эти результаты предлагают, который NO вносит вклад в материнское сосудорасширение, обслуживание утробной неподвижности, и патогенеза и клинических особенностей гипертензивных нарушений в течение беременности.

TI: The calcium-dependent nitric oxide production of human vascular endothelial cells in preeclampsia.

TI: зависимая кальцием продукция оксида азота человеческих сосудистых эндотелиальных ячеек в преэклампсии.

AU: Orpana-AK; Avela-K; Ranta-V; Viinikka-L; Ylikorkala-O

AD: Department of Obstetrics and Gynecology, University of Helsinki, Finland.

SO: Am-J-Obstet-Gynecol. 1996 Mar; 174(3): 1056-60

AB: OBJECTIVE: Nitric oxide is an important vasodilator, and in this study we studied whether the calcium-dependent nitric oxide production capacity of human umbilical vein endothelial cells was affected by preeclampsia. STUDY DESIGN: Human umbilical vein endothelial cells were isolated from 11 preeclamptic and 10 normotensive pregnancies. The maximal calcium ionophore A23187-stimulated nitric oxide production capacity was measured as accumulation of nitrate and nitrite into the culture medium, and it was related to the number of viable endothelial cells by measurement of their mitochondrial dehydrogenase activity. RESULTS: The cell number-related nitric oxide production capacity was similar in preeclamptic and normotensive pregnancies. The total nitric oxide production of cells from preeclamptic pregnancies was significantly lower (p <0.001). This difference, however, was mainly caused by larger amount of viable endothelial cells recovered from normotensive pregnancies. CONCLUSION: The maximal calcium-dependent nitric oxide production capacity of individual human umbilical vein endothelial cells is not affected by preeclampsia.