ESPE Abstracts

Background: Birth weight (BW) is often used as a proxy for gestational age (GA) by studies on preterm birth. Recent data indicate that the terms very-low-birth-weight (VLBW; BW <1500 g) and very preterm (VP; GA <32 weeks) birth are not equivalent with regard to perinatal outcomes and postnatal growth up until final height. It is unknown whether the differences between these terms could be extended to long-term neurodevelopmental outcomes.Objectiv...

Background: Preterm newborns are at risk of becoming transiently hypothyroxinaemic, which has been associated with neurodevelopmental impairments in childhood. It is not known whether these associations persist into adulthood.Objective and hypotheses: We studied the relation between transient hypothyroxinaemia of prematurity and IQ, neuromotor functioning and problem behaviour at young adult age.Method: This was a prospective study...

Background: Preterm birth is associated with hypertension and increased fat contents in later life. Salt sensitivity (SS) could be a mechanism underlying this relationship. In adults SS has been recognised as a cause of hypertension that is related to low birth weight and obesity.Objective and hypotheses: We studied the prevalence of SS in 7–8-year old children born <32 weeks of gestation and/or with a birth weight <1500 g as well as its rel...

In adults and older children with adrenal insufficiency, hydrocortisone replacement therapy is based on the assumption that the secretion of cortisol follows a diurnal pattern, with a peak in the early morning, a gradual decline over the day and a nadir at midnight. However, replacement therapy with multiple daily doses of hydrocortisone is unable to exactly match the normal diurnal rhythm of cortisol secretion from an intact hypothalamus-pituitary-adrenal (HPA) axis, with con...

Background: The hypothalamus-pituitary-adrenal (HPA) axis displays a diurnal rhythm, peaking in the morning and with a nadir at night. However, not much is known about the development of the HPA- axis, although strikingly some evidence suggests that a rhythm with a peak in the afternoon is already present antenatally. We aimed to describe HPA-axis activity at age 1 month as well as study possible influencing factors.Methods</stro...

Rationale: Bronchopulmonary dysplasia (BPD) is a major complication of preterm birth, which pathophysiology involves systematic inflammation. Preterm infants commonly suffer from relative adrenal insufficiency (RAI) in their first week of life, resulting in an insufficient production of cortisol inappropriate for the degree of inflammation. One of the major causes of RAI is immaturity of adrenal cortex enzymes, leading to an accumulation of cortisol precursors...

Background: Inter-individual differences in the metabolism of cortisol have been postulated to emerge during puberty, and might be explained by a complex interplay of genetic and environmental factors. The aim of the current study was to estimate the relative contributions of genetic, shared environmental, and unshared environmental factors on cortisol metabolism in a longitudinal twin cohort assessed at pre-pubertal, mid-pubertal and post-pubertal ages....

Background: Differences in hypothalamus–pituitary–adrenal (HPA-)axis functioning have been proposed to underlie gender-specific cardiovascular and neurocognitive disease susceptibility.Objective and hypotheses: We conducted a systematic review and meta-analysis to test the hypothesis that gender-specific differences in HPA-axis activity are already present in childhood.Method: We searched two electronic databases (PubMed ...

Background: Subtle impairments in the thyroid function of pregnant women are associated with poorer scores on mental developmental scales in their children at age 2–3 years, and with reduced performance in a simple reaction time test at 5–6 years. However, associations with school performance estimates have never been studied.Objective and hypotheses: We aimed to assess the effect of normal variation in the maternal thyroid function during earl...

Background: In mammals, maternal glucocorticoids are transmitted through breast milk, particularly under stressful circumstances. In humans, it is unclear whether milk cortisol levels are dependent on stressful perinatal circumstances, such as preterm birth.Objective and hypotheses: Our aim was to compare cortisol concentrations in breast milk of mothers of very preterm infants (GA <32 weeks) to breast milk cortisol concentrations of mothers of full-...