BACKGROUND: Several epidemiologic studies suggest a slightly increased risk of type 2 diabetes in relation to background levels of dioxins. Little is known about how serum dioxins might affect insulin resistance, a hallmark of type 2 diabetes. We examined the association between exposure to dioxins and insulin resistance. METHODS: We investigated 1234 nondiabetic persons living near a deserted pentachlorophenol factory. Using high-resolution gas chromatography/high-resolution mass spectrometry and blood biochemistry tests, we measured serum dioxins, fasting glucose, and insulin. Finally, we examined associations between serum dioxin levels and the homoeostasis model assessments of insulin resistance and pancreatic beta-cell function. RESULTS: Participants with insulin resistance (index at or above the 75th percentile) had higher dioxin levels (24.3 vs. 19.8 pg WHO(98)-TEQ(DF)/g lipid) than those without insulin resistance. In both the crude and adjusted models, insulin resistance increased with serum polychlorinated dibenzo-p-dioxins and dibenzofuran (PCDD/F) levels. We found a slight monotonic increase in insulin resistance across the serum PCDD/F categories (P for the trend <0.001). Groups with serum dioxin levels higher than 20.5 pg WHO(98)-TEQ(DF)/g lipid had higher insulin resistance (adjusted odds ratios of 2.7, 3.5, and 5.0 for 50th to <75th, 75th to <90th, and >or=90th percentile, respectively) compared with the reference group (<9.6 pg WHO(98)-TEQ(DF)/g lipid [< 10th percentile]). CONCLUSIONS: After adjusting for confounding factors, we found a positive association between serum dioxins and the prevalence of insulin resistance.
BACKGROUND: Several epidemiologic studies suggest a slightly increased risk of type 2 diabetes in relation to background levels of dioxins. Little is known about how serum dioxins might affect insulin resistance, a hallmark of type 2 diabetes. We examined the association between exposure to dioxins and insulin resistance. METHODS: We investigated 1234 nondiabetic persons living near a deserted pentachlorophenol factory. Using high-resolution gas chromatography/high-resolution mass spectrometry and blood biochemistry tests, we measured serum dioxins, fasting glucose, and insulin. Finally, we examined associations between serum dioxin levels and the homoeostasis model assessments of insulin resistance and pancreatic beta-cell function. RESULTS:Participants with insulin resistance (index at or above the 75th percentile) had higher dioxin levels (24.3 vs. 19.8 pg WHO(98)-TEQ(DF)/g lipid) than those without insulin resistance. In both the crude and adjusted models, insulin resistance increased with serum polychlorinated dibenzo-p-dioxins and dibenzofuran (PCDD/F) levels. We found a slight monotonic increase in insulin resistance across the serum PCDD/F categories (P for the trend <0.001). Groups with serum dioxin levels higher than 20.5 pg WHO(98)-TEQ(DF)/g lipid had higher insulin resistance (adjusted odds ratios of 2.7, 3.5, and 5.0 for 50th to <75th, 75th to <90th, and >or=90th percentile, respectively) compared with the reference group (<9.6 pg WHO(98)-TEQ(DF)/g lipid [< 10th percentile]). CONCLUSIONS: After adjusting for confounding factors, we found a positive association between serum dioxins and the prevalence of insulin resistance.
Authors: Marcella Warner; Stephen Rauch; Paolo Brambilla; Stefano Signorini; Paolo Mocarelli; Brenda Eskenazi Journal: Environ Int Date: 2019-11-11 Impact factor: 9.621
Authors: Tine L M Hectors; Caroline Vanparys; Luc F Van Gaal; Philippe G Jorens; Adrian Covaci; Ronny Blust Journal: Environ Health Perspect Date: 2013-09-20 Impact factor: 9.031
Authors: Jan Aaseth; Dragana Javorac; Aleksandra Buha Djordjevic; Zorica Bulat; Anatoly V Skalny; Irina P Zaitseva; Michael Aschner; Alexey A Tinkov Journal: Toxics Date: 2022-02-02
Authors: Marcella Warner; Paolo Mocarelli; Paolo Brambilla; Amelia Wesselink; Steven Samuels; Stefano Signorini; Brenda Eskenazi Journal: Environ Health Perspect Date: 2013-05-14 Impact factor: 9.031