Title: Arsenic exposure during pregnancy and postpartum maternal glucose tolerance: evidence from Bangladesh.

Authors: Fleisch, Abby F; Mukherjee, Sudipta Kumer; Biswas, Subrata K; Obrycki, John F; Ekramullah, Sheikh Muhammad; Arman, D M; Islam, Joynul; Christiani, David C; Mazumdar, Maitreyi

Published In Environ Health, (2022 Jan 14)

Abstract: BACKGROUND: Arsenic exposure has been associated with gestational diabetes mellitus. However, the extent to which arsenic exposure during pregnancy is associated with postpartum glucose intolerance is unknown. METHODS: We studied 323 women in Bangladesh. We assessed arsenic exposure in early pregnancy via toenail and water samples. We measured fasting glucose and insulin in serum at a mean (SD) of 4.0 (3.5) weeks post-delivery. We ran covariate-adjusted, linear regression models to examine associations of arsenic concentrations with HOMA-IR, a marker of insulin resistance, and HOMA-β, a marker of beta cell function. RESULTS: Median (IQR) arsenic concentration was 0.45 (0.67) μg/g in toenails and 2.0 (6.5) μg/L in drinking water. Arsenic concentrations during pregnancy were not associated with insulin resistance or beta cell function postpartum. HOMA-IR was 0.07% (- 3.13, 3.37) higher and HOMA-β was 0.96% (- 3.83, 1.99) lower per IQR increment in toenail arsenic, but effect estimates were small and confidence intervals crossed the null. CONCLUSIONS: Although arsenic exposure during pregnancy has been consistently associated with gestational diabetes mellitus, we found no clear evidence for an adverse effect on postpartum insulin resistance or beta cell function.

PubMed ID: 35031057

MeSH Terms: Arsenic*/analysis; Bangladesh/epidemiology; Blood Glucose; Diabetes, Gestational*/chemically induced; Diabetes, Gestational*/epidemiology; Female; Glucose; Humans; Postpartum Period; Pregnancy