Polybrominated diphenyl ether exposure and reproductive hormones in North American men

Background: Polybrominated diphenyl ethers (PBDEs) are flame retardant chemicals that are persistent organic pollutants. Animal experiments and some human studies indicate that PBDEs may adversely affect male reproductive function. Objectives: To assess the association between PBDE exposure and reproductive hormones (RHs) in a North American male adult cohort. Methods: From 2010-11, we collected three serum samples from 27 healthy adult men. We assessed associations between PBDEs and RHs using mixed effect regression models. Results: PBDEs were inversely associated with inhibin-B. In older men, increased concentrations of BDE-47 and BDE-100 were significantly associated with a decrease in inhibin-B, and an increase in follicular stimulating hormone (FSH). Conclusions: These findings suggest PBDE exposure may affect RHs in older men. We did not measure other parameters of male reproductive function and therefore these results are preliminary. (C) 2016 Elsevier Inc. All rights reserved.