Reduced 11beta-hydroxysteroid dehydrogenase type 2 activity is associated with decreased birth weight centile in pregnancies complicated by asthma

The Journal of Clinical Endocrinology and Metabolism
V E MurphyV L Clifton

Abstract

Pregnancies complicated by asthma are associated with an increased risk of low birth weight. Currently, the mechanisms causing this outcome are unknown. To investigate whether impaired placental function may be a determinant, we measured placental 11beta-hydroxysteroid dehydrogenase type 2 (11beta-HSD2) activity, protein and mRNA, placental CRH mRNA, fetal cortisol, and fetal estriol concentrations at delivery. Asthmatic subjects were classified according to inhaled glucocorticoid intake during pregnancy and compared with a control nonasthmatic group. There was a 25% reduction in neonatal birth weight centile in asthmatic women who did not use inhaled glucocorticoid treatment. This was accompanied by significantly reduced placental 11beta-HSD2 activity, significantly increased fetal cortisol, and a trend toward increased placental CRH mRNA and reduced fetal estriol concentrations. The use of inhaled glucocorticoids for treatment was associated with birth weight centile, 11beta-HSD2 activity, CRH mRNA, fetal cortisol, and estriol concentrations similar to control levels. There was a significant inverse correlation between fetal cortisol and fetal estriol concentrations across all groups. These studies demonstrate that inhaled gl...Continue Reading

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Citations

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