○Background : Recently, the background exposure to hazardous chemicals like persistent organic pollutants (POPs), arsenic, and bisphenol A is linked to metabolic syndrome, type 2 diabetes, and cardiovascular diseases in general populations. However,...
○Background : Recently, the background exposure to hazardous chemicals like persistent organic pollutants (POPs), arsenic, and bisphenol A is linked to metabolic syndrome, type 2 diabetes, and cardiovascular diseases in general populations. However, most studies reported until now is cross-sectional and difficult to establish causality. This study was performed to prospectively explore the associations of POPs, arsenic, and bisphenol A with the developing risk of metabolic syndrome in Korean using a nested case control study.
○Methods : The community-based cohort of 1,007 aged 40 or older was established in Uljin county in 2006 and was followed-up in 2011. Among 754 participants without metabolic syndrome at baseline, we selected 60 cases who developed metabolic syndrome in 2011 and 60 controls without metabolic syndrome in the follow-up survey. Among various POPs, organochlorine pesticides and polychlorinated biphenyls (PCBs) were measured in stored serums which were collected at baseline. Arsenic and bisphenol A were also measured in stored urines.
○Results : Most of organochlorine pesticides and PCBs showed positive trends with the developing risk of metabolic syndrome. However, POPs which reached statistical significances in terms of individual odds ratio, test for trend, or test for quadratic association were heptachlor epoxide, oxychlordane, PCB156, PCB177, and PCB178. When five components of metabolic syndrome were separatedly analyzed, some POPs were also positively associated with hypertriglycemia, high blood pressure, and high fasting glucose. In case of abdominal obesity, heptachlor epoxide and oxychlordane belonging to organochlorine pesticides showed positive associations while some PCBs inversely predicted it. On the other hand, neither arsenic nor bisphenol A was associated with metabolic syndrome.
○Conclusion : Similar with the results from cross-sectional studies, some organochlorine pesticides and PCBs predicted the future risk of metabolic syndrome. Considering the current epidemic of metabolic syndrome worldwide, any effect of reducing the exposure to POPs can be effective to decrease the risk of metabolic syndrome.