4.7 Review

Adverse Effects of Black Carbon (BC) Exposure during Pregnancy on Maternal and Fetal Health: A Contemporary Review

Journal

TOXICS
Volume 10, Issue 12, Pages -

Publisher

MDPI
DOI: 10.3390/toxics10120779

Keywords

air pollution; black carbon; pregnancy; placenta; respiratory disease; cardiometabolic disease; inflammation; low birth weight; preterm birth; gestational diabetes mellitus

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BC exposure has been correlated with adverse effects on fetal health, including low birth weight and preterm birth risks, as well as cardiometabolic and respiratory complications for the mother. Further research is needed to thoroughly investigate the increased risk of gestational diabetes and other maternal health issues associated with BC exposure.
Black carbon (BC) is a major component of ambient particulate matter (PM), one of the six Environmental Protection Agency (EPA) Criteria air pollutants. The majority of research on the adverse effects of BC exposure so far has been focused on respiratory and cardiovascular systems in children. Few studies have also explored whether prenatal BC exposure affects the fetus, the placenta and/or the course of pregnancy itself. Thus, this contemporary review seeks to elucidate state-of-the-art research on this understudied topic. Epidemiological studies have shown a correlation between BC and a variety of adverse effects on fetal health, including low birth weight for gestational age and increased risk of preterm birth, as well as cardiometabolic and respiratory system complications following maternal exposure during pregnancy. There is epidemiological evidence suggesting that BC exposure increases the risk of gestational diabetes mellitus, as well as other maternal health issues, such as pregnancy loss, all of which need to be more thoroughly investigated. Adverse placental effects from BC exposure include inflammatory responses, interference with placental iodine uptake, and expression of DNA repair and tumor suppressor genes. Taking into account the differences in BC exposure around the world, as well as interracial disparities and the need to better understand the underlying mechanisms of the health effects associated with prenatal exposure, toxicological research examining the effects of early life exposure to BC is needed.

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