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Published on: October 2, 2018
[Dehydroepiandrosterone sulfate and insulin of prepubertal girls born small for gestational age]
You-zhi Jiang1, Min Zhu, Feng Xiong
1Department of Pediatric Endocrinology, The Affiliated Children's Hospital of Chongqing University of Medical Sciences, Chongqing 400014, China. youzhijiang74@yahoo.com.cn
Insights
Girls born small for gestational age (SGA) exhibit earlier adrenarche and adrenal hyperandrogenism. While hyperinsulinism is present, insulin resistance was not detected in these prepubertal girls.
Area of Science:
- Pediatric Endocrinology
- Metabolic Disorders
- Adolescent Health
Context:
- Low birth weight, specifically being small for gestational age (SGA), is a potential risk factor for later health issues.
- Understanding the endocrine development in SGA children is crucial for early intervention and management.
- Prepubertal endocrine changes, including adrenarche, can predict future metabolic and hormonal imbalances.
Purpose:
- To investigate the association between low birth weight (SGA) and the risk of premature adrenarche, adrenal hyperandrogenism, hyperinsulinism, and insulin resistance in prepubertal girls.
- To determine the onset of adrenarche in SGA infants compared to normal birth weight girls.
Summary:
- This study compared 39 prepubertal SGA girls with 42 appropriate for gestational age (AGA) girls.
- SGA girls showed significantly lower birth weight, height, and weight, but similar BMI and glucose levels compared to AGA girls.
- Fasting insulin and dehydroepiandrosterone sulfate (DHEAS) were significantly higher in SGA girls, indicating hyperinsulinism and adrenal hyperandrogenism. Adrenarche tended to occur earlier in SGA girls, but no insulin resistance was observed.
Impact:
- The findings suggest that SGA is associated with earlier adrenarche and adrenal hyperandrogenism in prepubertal girls.
- Early adrenarche in SGA girls may signal a need for closer monitoring for potential metabolic disturbances.
- This research contributes to understanding the long-term endocrine consequences of fetal growth restriction.
Objectives:
To investigate whether the association between low birth weight and increased risk of developing premature adrenarche, adrenal hyperandrogenism, hyperinsulinism and insulin resistance is apparent in prepubertal girls born small for gestational age (SGA) and analyze when adrenarche occurs in SGA infants and normal birth weight girls.
Methods:
The study was performed in 39 prepubertal SGA girls with a mean age of 7.4 +/- 1.7 years and 42 prepubertal appropriate for gestational age (AGA) girls with a mean age of 7.4 +/- 1.7 years served as controls. All children were born at term and were prepubertal. Detailed physical examination was performed for all the children after 12 h of overnight fasting. Blood samples were taken for the measurement of fasting glucose (FPG), insulin (FIns), dehydroepiandrosterone sulfate (DHEAS), cortisol and estradiol concentrations. Insulin sensitivity was assessed by insulin sensitivity index [IAI = log(e) (FPG x FIns)].
Result:
There was no premature adrenarche in SGA and AGA groups. Birth weight was significantly lower in SGA group (P < 0.001). Gestational age was similar in both groups. At the time of the study, the ages, body mass index (BMI), fasting glucose, cortisol and estradiol did not significantly differ between the two groups. But body height and weight were significantly lower in the SGA group (P < 0.05 for both). The fasting plasma insulin in the SGA group was higher than that in AGA group (common logarithmic transformation: 1.076 +/- 0.041 vs. 1.050 +/- 0.051, P < 0.05). The insulin sensitivity index was not significantly different between the two groups (-4.0165 +/- 0.1761 vs. -3.9768 +/- 0.2314). The serum DHEAS was significantly higher in SGA children than in AGA children (common logarithmic transformation: 2.637 +/- 0.271 vs. 2.514 +/- 0.250, P < 0.05). From about age 7 the concentration of DHEAS had a gradual rise in AGA children. The time of DHEAS rise tended to be earlier in SGA children compared with AGA children.
Conclusions:
Adrenarche commences at approximately 7 years of age in AGA girls. The time of adrenarche tended to be earlier in SGA girls compared with AGA girls. There were adrenal hyperandrogenism and hyperinsulinism in prepubertal girls born small for gestational age. But there was no insulin resistance as assessed by insulin sensitivity index.
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