Plasma Immunoreactive Endothelin-1 Concentration in Cord Blood of Normal Term Neonates

Abstract
Plasma immunoreactive endothelin-1 (ir-ET-1) concentrations in cord blood of 20 term infants were measured by radioimmunoassay. The mean (± SEM) ir-ET-1 concentration was 1.04 ± 0.29 pg/mL There was no relationship between ir-ET-1 concentrations and race, sex, mode of delivery, and prenatal characteristics, such as cocaine exposure. The current methodologies were reviewed in an effort to explain the differences in ET-1 concentrations reported in various studies.

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