No Association of Antenatal Synthetic Glucocorticoid Exposure and Hair Steroid Levels in Children and Adolescents.

Context: Antenatal synthetic glucocorticoid (sGC) treatment constitutes a potent programming factor of the hypothalamic-pituitary-adrenal (HPA) axis. Previous findings from our group revealed long-term changes in cortisol stress reactivity following antenatal sGC therapy. However, the few prior studies exclusively relied on spot measurements of phasic HPA axis activity, which may not adequately capture cortisol output over prolonged periods of time.

Objective: To address this gap, the current study utilized hair steroid concentrations, a valid marker of integrated long-term HPA-axis activity, to investigate endocrine changes in individuals treated with antenatal sGC.

Design, Setting, And Participants: This cross-sectional study comprised 76 term-born children (7-12 years) and 58 adolescents (14-18 years). Cumulated hormonal secretion in scalp hair over a 3-month period was determined for different biomarkers of tonic HPA axis activity by liquid chromatography coupled with tandem mass spectrometry. Hair steroid levels were compared between participants with antenatal sGC therapy (dexamethasone or betamethasone) and different control groups.

Results: Findings from this study provide no evidence for a significant effect of antenatal sGCs on long-term hair steroid concentrations. Participants treated with antenatal sGC exhibited comparable levels of hair cortisol, cortisone, dehydroepiandrosterone, and cortisol/dehydroepiandrosterone ratios compared to those of mothers who had been admitted to hospital for pregnancy complications but had never received sGC therapy and controls from physiological pregnancies.

Conclusion: In conjunction with data from previous studies, it is thus tempting to speculate that sGC may affect the capacity of dynamic changes and flexible adaption of an individual's HPA axis rather than changes in tonic steroid output.