1. Pancreatic Beta Cell Function in Infants Varies by Maternal Weight
- Author
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Lisa R. Staimez, Anubrati Dutta, Yara S. Beyh, Ruby Gupta, Hari Krishna Noule, Vyakaranam Sapna, Kothapally Deepa, Aryeh D. Stein, K.M. Venkat Narayan, Dorairaj Prabhakaran, Basany Kalpana, and Poornima Prabhakaran
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pancreatic beta cell function ,infancy ,developmental origins ,pregnancy ,weight ,Microbiology ,QR1-502 - Abstract
The Asian Indian Beta Cell function (ABCs) in Infants Study examined the associations of maternal weight on infant pancreatic beta cell function across 7 months postpartum. Pregnant women aged 18–35 years were recruited in Hyderabad, India. Women were classified by first trimester weight as underweight (UW), BMI < 18.5 kg/m2; normal weight (NW), BMI 18.5–22.9 kg/m2; or overweight (OW), BMI 23.0 through 2. At age > 7 months, infants had an oral glucose tolerance test (OGTT, 1.75 g glucose/kg bodyweight) following a 3 h fast. Infant blood samples were assayed for C-peptide and glucose. Infant beta cell function (HOMA2-B; disposition index, DI) and insulin resistance (HOMA2-IR) were compared across maternal weight groups. Mothers (UW n = 63; NW n = 43; OW n = 29) had similar age at delivery and second trimester 50 g glucose challenge test results. Cord HOMA2-B values were 51% greater for IUW (83.5, SD 55.2) and 44% greater for IOW (79.9, SD 60.8) vs. INW (55.4, SD 51.5), forming a U-shaped relationship between maternal weight and HOMA2-B. No qualitative differences in HOMA2-IR were found at birth. However, at 7 months postpartum, HOMA2-IR changed most within IUW (−64% median reduction) and changed the least in IOW (−7% median reduction). At seven months postpartum, DI was higher in IUW vs. the other groups (geometric mean IUW 1.9 SD 2.5; INW 1.3 SD 2.6 or vs. IOW mean 1.2 SD 3.7), reflecting a +49% difference in DI. Evidence from this study illustrates adaptations in the pancreatic functional response of infants associated with the maternal nutritional environment.
- Published
- 2024
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