I-Jen Wang1, Chia-Yang Chen2, Carl-Gustaf Bornehag3. 1. Department of Pediatrics, Taipei Hospital, Ministry of Health and Welfare, Taipei, Taiwan; Institute of Environmental and Occupational Health Sciences, College of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Health Risk Management, China Medical University, Taichung, Taiwan. Electronic address: wij636@gmail.com. 2. Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan. 3. Department of Health, Karlstad University, Karlstad, Sweden.
Abstract
BACKGROUND: Little is known about the effect of Bisphenol A (BPA) on atopic disorders. OBJECTIVE: To investigated the associations (i) between postnatal BPA exposure and allergic diseases in children; (ii) between BPA and IgE levels for the possible disease pathogenesis; and (iii) gender-based differences. METHODS: A total of 453 children from Childhood Environment and Allergic Diseases Study cohort with urine and blood samples were recruited in Taiwan. Urinary BPA glucoronide (BPAG) levels were measured by UPLC-MS/MS at ages 3 and 6 years. The associations between BPAG levels at different ages and IgE levels and the development of allergic diseases were evaluated by multivariate linear regression and logistic regression. A mediation analysis was also conducted to evaluate how much risk of allergic diseases in relation to BPA exposure is explained by IgE changes. RESULTS: The BPAG levels at age 3 were positively associated with IgE levels at age 3 (β=64.85kU/l per ln-unit increase BPAG level; 95% CI, 14.59-115.11kU/l). Stratified by gender, BPAG levels at age 3 were positively associated with IgE levels at age 3, particularly in girls (β=139.23kU/l; 95% CI, 57.38-221.09kU/l). Similar results were also found at age 6. Urinary BPAG levels at age 3 were significantly associated with asthma at ages 3 and 6, with OR (95%CI) of 1.29(1.08-1.55) and 1.27(1.04-1.55). We estimated that 70% of the total effect of BPA exposure on asthma is mediated by IgE levels. CONCLUSIONS: BPA exposures were associated with IgE levels and may increase the risk of development of allergic diseases in children particularly in girls.
BACKGROUND: Little is known about the effect of Bisphenol A (BPA) on atopic disorders. OBJECTIVE: To investigated the associations (i) between postnatal BPA exposure and allergic diseases in children; (ii) between BPA and IgE levels for the possible disease pathogenesis; and (iii) gender-based differences. METHODS: A total of 453 children from Childhood Environment and Allergic Diseases Study cohort with urine and blood samples were recruited in Taiwan. Urinary BPAglucoronide (BPAG) levels were measured by UPLC-MS/MS at ages 3 and 6 years. The associations between BPAG levels at different ages and IgE levels and the development of allergic diseases were evaluated by multivariate linear regression and logistic regression. A mediation analysis was also conducted to evaluate how much risk of allergic diseases in relation to BPA exposure is explained by IgE changes. RESULTS: The BPAG levels at age 3 were positively associated with IgE levels at age 3 (β=64.85kU/l per ln-unit increase BPAG level; 95% CI, 14.59-115.11kU/l). Stratified by gender, BPAG levels at age 3 were positively associated with IgE levels at age 3, particularly in girls (β=139.23kU/l; 95% CI, 57.38-221.09kU/l). Similar results were also found at age 6. Urinary BPAG levels at age 3 were significantly associated with asthma at ages 3 and 6, with OR (95%CI) of 1.29(1.08-1.55) and 1.27(1.04-1.55). We estimated that 70% of the total effect of BPA exposure on asthma is mediated by IgE levels. CONCLUSIONS:BPA exposures were associated with IgE levels and may increase the risk of development of allergic diseases in children particularly in girls.
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