L-Arginine and Antioxidant Vitamins During Pregnancy to Reduce Preeclampsia

Instituto Nacional de Perinatologia Isidro Espinosa de los Reyes

Status and phase

Terminated

Phase 2

Conditions

Pre-Eclampsia

Treatments

Procedure: Vitamin C and E supplementation in a medical food

Procedure: L-arginine supplementation in a medical food

Study type

Interventional

Funder types

Other

Identifiers

NCT00469846

212250-02071

Details and patient eligibility

About

This study is intended to assess the efficacy of L-arginine supplementation with antioxidant vitamins delivered in a medical food in reducing the incidence of preeclampsia in a high-risk population.

Full description

Preeclampsia is a syndrome of unknown origin characterized by hypertension, edema and proteinuria. It usually appears in the third trimester and occurs most frequently in primigravidas. Preeclampsia may be complicated by life-threatening conditions including seizures, severe hepatic dysfunction, renal failure and coagulopathy; it is one of the leading causes of maternal morbidity and mortality worldwide. Preeclampsia is cited as the leading cause of maternal death in surveys of maternal mortality in Mexico (25% of maternal deaths).

Specific Aim 1. To assess the efficacy of L-arginine supplementation with antioxidant vitamins delivered in a medical food in reducing the incidence of preeclampsia in a high-risk population. Two other groups will receive the food (bars) either with antioxidant vitamins alone or without vitamins in order to test the impact of vitamin supplements on prevention of preeclampsia. The primary hypothesis to be tested is that supplemental L-arginine in combination with antioxidant vitamins will significantly reduce preeclampsia (hypertension and proteinuria) and its complications in a high-risk population (women whose blood pressure is > 140/90 after 20 weeks gestation without proteinuria). Secondary hypotheses to be tested include that antioxidant vitamin supplementation contributes to the reduction in preeclampsia; that supplemental L-arginine and antioxidant vitamins will improve neonatal outcomes (reduced incidence of prematurity and intrauterine growth retardation); that preeclampsia is correlated inversely with plasma L-arginine levels, directly with the plasma levels of the endogenous NO synthase inhibitor, asymmetric dimethyl arginine (ADMA), and inversely with urinary NO metabolites, a marker of endogenous NO production; and that preeclampsia is inversely correlated with maternal plasma levels of antioxidant vitamins.

Enrollment

585 patients

Sex

Female

Ages

19 to 32 years old

Volunteers

No Healthy Volunteers

Inclusion criteria