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Jin T, Huang T, Zhang T, Li Q, Yan C, Wang Q, Chen X, Zhou J, Sun Y, Bo W, Luo Z, Li H, An Y. A Bayesian benchmark concentration analysis for urinary fluoride and intelligence in adults in Guizhou, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 925:171326. [PMID: 38460703 DOI: 10.1016/j.scitotenv.2024.171326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/26/2024] [Accepted: 02/26/2024] [Indexed: 03/11/2024]
Abstract
Environmental fluoride exposure has been linked to numerous cases of fluorosis worldwide. Previous studies have indicated that long-term exposure to fluoride can result in intellectual damage among children. However, a comprehensive health risk assessment of fluorosis-induced intellectual damage is still pending. In this research, we utilized the Bayesian Benchmark Dose Analysis System (BBMD) to investigate the dose-response relationship between urinary fluoride (U-F) concentration and Raven scores in adults from Nayong, Guizhou, China. Our research findings indecate a dose-response relationship between the concentration of U-F and intelligence scores in adults. As the benchmark response (BMR) increased, both the benchmark concentration (BMCs) and the lower bound of the credible interval (BMCLs) increased. Specifically, BMCs for the association between U-F and IQ score were determined to be 0.18 mg/L (BMCL1 = 0.08 mg/L), 0.91 mg/L (BMCL5 = 0.40 mg/L), 1.83 mg/L (BMCL10 = 0.83 mg/L) when using BMRs of 1 %, 5 %, and 10 %. These results indicate that U-F can serve as an effective biomarker for monitoring the loss of IQ in population. We propose three interim targets for public policy in preventing interllectual harm from fluoride exposure.
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Affiliation(s)
- Tingxu Jin
- Department of Toxicology, School of Public Health, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou 215123, Jiangsu, China; School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China.
| | - Tongtong Huang
- Department of Toxicology, School of Public Health, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou 215123, Jiangsu, China
| | - Tianxue Zhang
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Quan Li
- Center for Disease Control and Prevention, Nayong County, 553300 Bijie City, Guizhou Province, China
| | - Cheng Yan
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China; Hubei Key Laboratory of Environmental Water Science in the Yangtze River Basin, China University of Geosciences, Wuhan 430074, China
| | - Qian Wang
- Center for Disease Control and Prevention, Nayong County, 553300 Bijie City, Guizhou Province, China
| | - Xiufang Chen
- Center for Disease Control and Prevention, Nayong County, 553300 Bijie City, Guizhou Province, China
| | - Jing Zhou
- Center for Disease Control and Prevention, Nayong County, 553300 Bijie City, Guizhou Province, China
| | - Yitong Sun
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Wenqing Bo
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Ziqi Luo
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Haodong Li
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China
| | - Yan An
- Department of Toxicology, School of Public Health, Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou 215123, Jiangsu, China.
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Niu Z, Duan L, Du Y, Yu F, Chen R, Li Z, Ba Y, Zhou G. Effect of zinc intake on association between fluoride exposure and abnormal sex steroid hormones among US pubertal males: NHANES, 2013-2016. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:2759-2772. [PMID: 38063965 DOI: 10.1007/s11356-023-31135-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 11/16/2023] [Indexed: 01/18/2024]
Abstract
Excessive fluoride exposure can disturb the balance of sex hormones. Zinc is essential for sex hormone synthesis and spermatogenesis. But it is not clear how zinc affects the relationship of fluoride exposure with abnormal sex steroid hormones. Here, a total of 1008 pubertal males from the National Health and Nutrition Examination Survey (NHANES) in two cycles (2013-2014, 2015-2016) were enrolled. The concentrations of water fluoride and plasma fluoride and the levels of serum testosterone, estradiol, and sex hormone binding globulin (SHBG) were measured. Two 24-h dietary recall interviews were conducted to assess the dietary zinc intake. The relationships of fluoride exposure and zinc intake with sex hormones were examined using linear regression and logistic regression models, while the generalized additive model was used to evaluate their non-linear relationship. Our findings revealed that for every two-fold increase in plasma fluoride concentration, testosterone levels decreased by 7.27% (95% CI - 11.49%, - 2.86%) and estradiol levels decreased by 8.73% (95% CI - 13.61%, - 3.57%). There was also significant non-linear association observed between zinc intake and SHBG levels. Being in the first tertile of plasma fluoride had a 60% lower risk of high SHBG (OR = 0.40, 95% CI 0.18, 0.89) compared with being in the second tertile. When compared to the first tertile, being in the second tertile of zinc intake was associated with a 63% (OR = 0.37, 95% CI 0.14, 0.98) lower risk of high SHBG. Furthermore, we observed an interactive effect between the plasma fluoride and zinc intake on estradiol and SHBG, as well as the risk of high SHBG (P-interaction < 0.10). These findings suggest that fluoride exposure and zinc intake can affect sex steroid hormone levels and the risk of high SHBG. Notably, zinc intake may alleviate the increased risk of high SHBG and the abnormal changes of estradiol and SHBG caused by higher fluoride exposure.
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Affiliation(s)
- Zeyuan Niu
- Department of Environment Health, School of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Leizhen Duan
- Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yuhui Du
- Department of Environment Health, School of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Fangfang Yu
- Department of Environment Health, School of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Ruiqin Chen
- Jinshui District Center for Disease Control and Prevention, Zhengzhou, Henan, People's Republic of China
| | - Zhiyuan Li
- Department of Environment Health, School of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Yue Ba
- Department of Environment Health, School of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
- Yellow River Institute for Ecological Protection & Regional Coordinated Development, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Guoyu Zhou
- Department of Environment Health, School of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
- National Health Commission Key Laboratory of Birth Defects Prevention, Henan Key Laboratory of Population Defects Prevention, Zhengzhou, Henan, People's Republic of China.
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