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Yang S, Yu S, Du Y, Feng Z, Jiao X, Li Q, Wu J, Sun L, Zuo J, Fu X, Li Z, Huang H, Zhou G, Yu F, Ba Y. Correlations between bone metabolism biomarkers and fluoride exposure in adults and children. J Trace Elem Med Biol 2024; 84:127419. [PMID: 38461620 DOI: 10.1016/j.jtemb.2024.127419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/14/2024] [Accepted: 02/24/2024] [Indexed: 03/12/2024]
Abstract
Increased exposure to fluoride, which notably affects bone metabolism, is a global concern. However, the correlations and sensitivity of bone metabolism to fluoride remain controversial. In this cross-sectional study, 549 children (aged 7-12 years) and 504 adults (≥ 18 years old) were recruited in the high-fluoride areas of the Henan Province. Urinary fluoride (UF) level was determined using a fluoride electrode. Fasting venous blood serum was collected to measure bone metabolism biomarkers. The selected bone metabolism biomarkers for children included bone alkaline phosphatase (BALP), serum alkaline phosphatase (ALP), osteocalcin (OCN), calcitonin (CT), parathyroid hormone (PTH), phosphorus (P5+), and calcium (Ca2+). For adults, the biomarkers included ALP, CT, PTH, β-CrossLaps (β-CTX), P5+, and Ca2+. The correlations between UF and bone metabolism biomarkers were analyzed using binary logistic regression, a trend test, a generalized additive model, and threshold effect analysis. Regression analysis indicated a significant correlation between serum OCN, PTH, and UF levels in children aged 7-9 years. Serum OCN, PTH, and BALP contents were significantly correlated with UF in boys (P < 0.05). Furthermore, the interaction between age and UF affected serum P5+ and PTH (P < 0.05). The generalized additive model revealed nonlinear dose-response relationships between P5+, BALP, and UF contents in children (P < 0.05). Serum OCN level was linearly correlated with the UF concentration (P < 0.05). Similarly, a significant correlation was observed between β-CTX and UF levels in adults. In addition, significant correlations were observed between UF-age and serum Ca2+, β-CTX, and PTH contents. There was a non-linear correlation between serum Ca2+, P5+, and β- CTX and UF levels (P < 0.05). Overall, serum OCN, BALP, and P5+ levels can serve as sensitive bone metabolism biomarkers in children, while β-CTX, P5+, and Ca2+ can be considered fluoride-sensitive bone metabolism biomarkers in adults.
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Affiliation(s)
- Shuo Yang
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Shuiyuan Yu
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Yuhui Du
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Zichen Feng
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Xuecheng Jiao
- Department of Endemic Disease, Puyang Center for Disease Control and Prevention, Puyang, Henan 457000, China
| | - Qinyang Li
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Jingjing Wu
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Lei Sun
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Juan Zuo
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Xiaoli Fu
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Zhiyuan Li
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Hui Huang
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Guoyu Zhou
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Fangfang Yu
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China.
| | - Yue Ba
- Department of Environmental Health, School of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China.
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Skalny AV, Aschner M, Silina EV, Stupin VA, Zaitsev ON, Sotnikova TI, Tazina SI, Zhang F, Guo X, Tinkov AA. The Role of Trace Elements and Minerals in Osteoporosis: A Review of Epidemiological and Laboratory Findings. Biomolecules 2023; 13:1006. [PMID: 37371586 DOI: 10.3390/biom13061006] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
The objective of the present study was to review recent epidemiological and clinical data on the association between selected minerals and trace elements and osteoporosis, as well as to discuss the molecular mechanisms underlying these associations. We have performed a search in the PubMed-Medline and Google Scholar databases using the MeSH terms "osteoporosis", "osteogenesis", "osteoblast", "osteoclast", and "osteocyte" in association with the names of particular trace elements and minerals through 21 March 2023. The data demonstrate that physiological and nutritional levels of trace elements and minerals promote osteogenic differentiation through the up-regulation of BMP-2 and Wnt/β-catenin signaling, as well as other pathways. miRNA and epigenetic effects were also involved in the regulation of the osteogenic effects of trace minerals. The antiresorptive effect of trace elements and minerals was associated with the inhibition of osteoclastogenesis. At the same time, the effect of trace elements and minerals on bone health appeared to be dose-dependent with low doses promoting an osteogenic effect, whereas high doses exerted opposite effects which promoted bone resorption and impaired bone formation. Concomitant with the results of the laboratory studies, several clinical trials and epidemiological studies demonstrated that supplementation with Zn, Mg, F, and Sr may improve bone quality, thus inducing antiosteoporotic effects.
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Affiliation(s)
- Anatoly V Skalny
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Ekaterina V Silina
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Victor A Stupin
- Department of Hospital Surgery No. 1, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Oleg N Zaitsev
- Department of Physical Education, Yaroslavl State Technical University, 150023 Yaroslavl, Russia
| | - Tatiana I Sotnikova
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
- City Clinical Hospital n. a. S.P. Botkin of the Moscow City Health Department, 125284 Moscow, Russia
| | - Serafima Ia Tazina
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
| | - Feng Zhang
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, Health Science Center, School of Public Health, Xi'an Jiaotong University, Xi'an 710061, China
| | - Xiong Guo
- Key Laboratory of Trace Elements and Endemic Diseases, National Health and Family Planning Commission, Health Science Center, School of Public Health, Xi'an Jiaotong University, Xi'an 710061, China
| | - Alexey A Tinkov
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia
- Center of Bioelementology and Human Ecology, Institute of Biodesign and Modeling of Complex Systems, Department of Therapy of the Institute of Postgraduate Education, IM Sechenov First Moscow State Medical University (Sechenov University), 119435 Moscow, Russia
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3
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Ma Y, Meng X, Sowanou A, Wang J, Li H, Li A, Zhong N, Yao Y, Pei J. Effect of Fluoride on the Expression of 8-Hydroxy-2'-Deoxyguanosine in the Blood, Kidney, Liver, and Brain of Rats. Biol Trace Elem Res 2023; 201:2904-2916. [PMID: 35984601 DOI: 10.1007/s12011-022-03394-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/14/2022] [Indexed: 11/02/2022]
Abstract
Excessive exposure of fluoride not only leads to damage on bone, but also has an adverse effect on soft tissues. Oxidative DNA damage induced by fluoride is thought to be one of the toxic mechanisms of fluoride effect. However, the dose-response of fluoride on oxidative DNA damage is barely studied in organisms. This study investigated the concentration of fluoride in rat blood, kidney, liver, and brain as well as the dose-time effect of fluoride on the expression of 8-hydroxy-2'-deoxyguanosine (8-OHdG) in the above tissues. Rats were exposed to 0 mg/L, 25 mg/L, 50 mg/L, and 100 mg/L of fluorine ion and treated for one and three months. The results showed that the accumulation of fluoride in soft tissues was very different. At the first month, blood fluoride was increased, liver and brain fluoride showed a U-shaped change, and kidney fluoride was not significant. At the third month, blood fluoride was altered with an inverted U-shaped change, kidney and brain fluoride increased, but liver fluoride decreased. Both the exposure concentration and the time of exposure had a significant effect on the expression of 8-OHdG in the above tissues. However, the effect patterns of fluoride on these tissues were notably different at different times. At the first month of fluoride treatment, blood, kidney, and liver 8-OHdG decreased with the increasing fluoride concentration. At the third month, blood 8-OHdG showed a U-shaped change, but kidney 8-OHdG altered with an inverted U-shaped change. Liver 8-OHdG increased, while brain 8-OHdG decreased at the third month. Correlation analysis showed that only blood 8-OHdG was significantly inversely correlated with blood fluoride and dental fluorosis grade in both the first and third months. Liver 8-OHdG was negatively and significantly correlated with liver fluoride. There was a weak but nonsignificant correlation between kidney and brain 8-OHdG and fluoride in both tissues. Additionally, blood 8-OHdG was positively correlated with kidney and liver 8-OHdG at the first month and positively correlated with brain 8-OHdG at the third month. Taken together, our data suggests that concentration and time of fluoride exposure had a significant effect on 8-OHdG, but the effect patterns of fluoride on 8-OHdG were different in the tissues, which suggests that the impact of fluoride on 8-OHdG may be a tissue-specific, as well as a non-monotonic positive correlation.
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Affiliation(s)
- Yongzheng Ma
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Xinyue Meng
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Alphonse Sowanou
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Jian Wang
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Hanying Li
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Ailin Li
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Nan Zhong
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Yingjie Yao
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Junrui Pei
- Key Laboratory of Etiology and Epidemiology, National Health Commission & Education Bureau of Heilongjiang Province (23618504), Education Bureau of Heilongjiang Province, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China.
- Heilongjiang Provincial Key Laboratory of Trace Elements and Human Health, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China.
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China.
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4
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Jiang N, Xu W, Zhang Z, Jin H, Yang Y, Zhang J, Xu H. Role of TGF-β1 in Fluoride-Treated Osteoblasts at Different Stages. Biol Trace Elem Res 2022; 200:740-748. [PMID: 34031801 DOI: 10.1007/s12011-021-02686-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 03/21/2021] [Indexed: 10/21/2022]
Abstract
Little attention has been paid to the tolerance of osteoblasts to fluoride in distinct differentiation stages, and the role of TGF-β1 in fluoride-treated osteoblast differentiation of progenitors and precursors was rarely mentioned in previous studies. The present study aimed to clarify how fluoride affected different differentiation stages of osteoblasts, and to elucidate the role of TGF-β1 in this process. We assessed cell migration, proliferation, DNA damage, and apoptosis of early-differentiated osteoblasts derived from bone marrow stem cells (BMSCs) exposed to fluoride with or without TGF-β1. Subsequently, MC3T3-E1 cells cultured with mineral induction medium were treated with fluoride to test fluoride's effect on late-differentiated osteoblasts. The specific fluoride concentrations and treatment times were chosen to evaluate the role of TGF-β1 in fluoride-induced osteoblastic differentiation and function. Results showed early-differentiated osteoblasts treated with a low dose of fluoride grew and moved more rapidly. TGF-β1 promoted cell proliferation and inhibited cell apoptosis in early-differentiated osteoblasts exposed to a low fluoride dose, but enhanced apoptosis at higher fluoride conditions. In the late-differentiated osteoblasts, the fluorine dose range with anabolic effects was narrowed, and the fluoride range with catabolic effects was widened. Treatment with a low fluoride dose stimulated the alkaline phosphatase (ALP) expression. TGF-β1 treatment inhibited Runx2 expression but increased RANKL expression in late-differentiated osteoblasts exposed to fluoride. Meanwhile, TGF-β1 treatments activated Smad3 phosphorylation but blocked Wnt10b expression in osteoblasts. We conclude that TGF-β1 plays an essential role in fluoride-induced differentiation and osteoblast function via activation of Smad3 instead of Wnt10 signaling.
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Affiliation(s)
- Ningning Jiang
- Department of Regenerative Medical Science, School of Pharmaceutical Sciences, Jilin University, Changchun, 130021, People's Republic of China
| | - Wenshu Xu
- Department of Regenerative Medical Science, School of Pharmaceutical Sciences, Jilin University, Changchun, 130021, People's Republic of China
| | - Zhongyuan Zhang
- Department of Regenerative Medical Science, School of Pharmaceutical Sciences, Jilin University, Changchun, 130021, People's Republic of China
| | - Hui Jin
- China-Japan Union Hospital, Jilin University, Changchun, 130033, People's Republic of China
| | - Yang Yang
- Department of Regenerative Medical Science, School of Pharmaceutical Sciences, Jilin University, Changchun, 130021, People's Republic of China
| | - Jingmin Zhang
- Department of Regenerative Medical Science, School of Pharmaceutical Sciences, Jilin University, Changchun, 130021, People's Republic of China
| | - Hui Xu
- Department of Regenerative Medical Science, School of Pharmaceutical Sciences, Jilin University, Changchun, 130021, People's Republic of China
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Wang X, Tewari N, Sato F, Tanimoto K, Thangavelu L, Makishima M, Bhawal UK. Biphasic Functions of Sodium Fluoride (NaF) in Soft and in Hard Periodontal Tissues. Int J Mol Sci 2022; 23:ijms23020962. [PMID: 35055148 PMCID: PMC8780524 DOI: 10.3390/ijms23020962] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 02/04/2023] Open
Abstract
Sodium fluoride (NaF) is widely used in clinical dentistry. However, the administration of high or low concentrations of NaF has various functions in different tissues. Understanding the mechanisms of the different effects of NaF will help to optimize its use in clinical applications. Studies of NaF and epithelial cells, osteoblasts, osteoclasts, and periodontal cells have suggested the significant roles of fluoride treatment. In this review, we summarize recent studies on the biphasic functions of NaF that are related to both soft and hard periodontal tissues, multiple diseases, and clinical dentistry.
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Affiliation(s)
- Xingzhi Wang
- Department of Biochemistry, Nihon University School of Medicine, Tokyo 173-8610, Japan;
| | - Nitesh Tewari
- Centre for Dental Education and Research, Division of Pedodontics and Preventive Dentistry, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Fuyuki Sato
- Shizuoka Cancer Center, Pathology Division, Shizuoka 411-8777, Japan;
| | - Keiji Tanimoto
- Department of Translational Cancer Research, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan;
| | - Lakshmi Thangavelu
- Center for Transdisciplinary Research, Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai 600077, India;
| | - Makoto Makishima
- Department of Biochemistry, Nihon University School of Medicine, Tokyo 173-8610, Japan;
- Correspondence: (M.M.); (U.K.B.)
| | - Ujjal K. Bhawal
- Center for Transdisciplinary Research, Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Chennai 600077, India;
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba 271-8587, Japan
- Correspondence: (M.M.); (U.K.B.)
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6
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Zhong N, Ma Y, Meng X, Sowanou A, Wu L, Huang W, Gao Y, Pei J. Effect of Fluoride in Drinking Water on Fecal Microbial Community in Rats. Biol Trace Elem Res 2022; 200:238-246. [PMID: 33576944 DOI: 10.1007/s12011-021-02617-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 01/27/2021] [Indexed: 12/16/2022]
Abstract
Intestinal nutrition has a close association with the onset and development of fluorosis. Intestinal microbes play a major role in intestinal nutrition. However, the effect of fluoride on intestinal microbes is still not fully understood. This study aimed to evaluate the dose-response of fluoride on fecal microbes as well as the link between fluorosis and fecal microbes. The results showed that fluoride did not significantly alter the diversity of fecal microbiota, but richness estimators (ACE and Chao) increased first, and then decreased with the increase of water fluoride. At the genus level, 150 mg/L fluoride significantly reduced the abundances of Roseburia and Clostridium sensu stricto, and 100 mg/L and 150 mg/L fluoride obviously increased the abundances of Unclassified Ruminococcaceaes and Unclassified Bdellovibrionales, respectively. The correlation analysis showed fluoride exposure had a negative association with Roseburia and Turicibacter and was positively associated with Pelagibacterium, Unclassified Ruminococcaceae, and Unclassified Bdellovibrionales. Dental fluorosis was negatively associated with Clostridium sensu stricto, Roseburia, Turicibacter, and Paenalcaligenes and had a positive association with Pelagibacterium, Unclassified Ruminococcaceae, and Unclassified Bdellovibrionales. In conclusion, this study firstly reports fluoride in drinking water has a remarkable biphasic effect on fecal microbiota in rats, and some bacteria are significantly associated with fluoride exposure and dental fluorosis. These results indicate the gut microbiota may play an important role in fluorosis, and some bacteria are likely to be developed as biomarkers for fluorosis.
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Affiliation(s)
- Nan Zhong
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Yongzheng Ma
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Xinyue Meng
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Alphonse Sowanou
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Liaowei Wu
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Fluorosis Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Wei Huang
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Fluorosis Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Yanhui Gao
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Fluorosis Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Junrui Pei
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China.
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7
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Zhong N, Yao Y, Ma Y, Meng X, Sowanou A, Pei J. Effects of Fluoride on Oxidative Stress Markers of Lipid, Gene, and Protein in Rats. Biol Trace Elem Res 2021; 199:2238-2246. [PMID: 32789643 DOI: 10.1007/s12011-020-02336-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/06/2020] [Indexed: 12/20/2022]
Abstract
Endemic fluorosis is a systemic chronic disease caused by excessive intake of fluoride. It is widely accepted that oxidative stress is closely related to fluorosis; however, molecular mechanism of oxidative stress in fluorosis remains unclear. This study investigated the effects of fluoride (F) on oxidative stress markers of lipid, gene, and protein in rats for revealing molecular mechanism of oxidative stress in fluorosis. The results showed concentration and exposure time of fluoride both had a significant effect on MDA and 8-OHdG. Fluoride concentration significantly impacted AGEs level, but exposure time did not. AOPP was not statistically different among the groups. AGEs decreased with the increase of fluoride in the rats with 3 months of fluoride treatment. The correlation analysis showed the degree of dental fluorosis was significantly negatively correlated with 8-OHdG at 1 month and 3 months, and negatively correlated with AGEs at 3 months. In the rats with 100 mg/L of fluoride treatment, MDA was significant positively correlated with 8-OHdG, and negatively correlated with AGEs. 8-OHdG was significantly negatively correlated with AGEs in the control group and 100 mg/L fluoride group. Taken together, fluoride had different effects on oxidative stress markers of lipid, gene, and protein. Excessive fluoride could increase MDA content, and decrease 8-OHdG and AGEs. These findings suggest that oxidative stress involved in molecular pathogenesis of fluorosis is complicated, and needs to furtherly study in the future.
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Affiliation(s)
- Nan Zhong
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Yingjie Yao
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Yongzheng Ma
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Xinyue Meng
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Alphonse Sowanou
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Junrui Pei
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & National Health Commission (23618504), Institute for Kaschin-Beck Disease Control, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, 150081, Heilongjiang Province, China.
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8
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Meng X, Yao Y, Ma Y, Zhong N, Alphonse S, Pei J. Effect of fluoride in drinking water on the level of 5-methylcytosine in human and rat blood. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2021; 81:103511. [PMID: 33035703 DOI: 10.1016/j.etap.2020.103511] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/25/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
DNA methylation is an epigenetic modification of genome that is involved in many human diseases. Recent studies revealed DNA methylation may be associated with fluorosis. This study was aimed to evaluate the dose-response effect of fluoride on DNA methylation in human and rat blood. A commercial ELISA kit was employed to evaluate 5-methylcytosine (5-mC) level of genome in human and rat blood. A total of 281 subjects were enrolled in this study and divided into four equal-size groups by the quartile of fluoride in drinking water. The difference of 5-mC among the four groups was significant. The U-shaped relationship was found between fluoride and 5-mC in the population. The U-shaped curve was also observed in the rats with three months of fluoride treatments. Taken together, these results clue the disruption of DNA methylation in mammals may has a certain association with fluoride in natural exposures.
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Affiliation(s)
- Xinyue Meng
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Yingjie Yao
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Yongzheng Ma
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Nan Zhong
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Sowanou Alphonse
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Junrui Pei
- Key Lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health (23618504), Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang Province, China.
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9
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Godebo TR, Jeuland M, Tekle-Haimanot R, Shankar A, Alemayehu B, Assefa G, Whitford G, Wolfe A. Bone quality in fluoride-exposed populations: A novel application of the ultrasonic method. Bone Rep 2020; 12:100235. [PMID: 31890757 PMCID: PMC6933268 DOI: 10.1016/j.bonr.2019.100235] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/04/2019] [Accepted: 12/05/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Various studies, mostly with animals, have provided evidence of adverse impacts of fluoride (F-) on bone density, collagen and microstructure, yet its effects on overall bone quality (strength) has not been clearly or extensively characterized in human populations. OBJECTIVE In this observational study, we assessed variation in an integrated measures of bone quality in a population exposed to wide-ranging F- levels (0.3 to 15.5 mg/L) in drinking water, using a novel application of non-ionizing ultrasonic method. METHOD We collected 871 speed of sound (SOS) measurements from 341 subjects residing in 25 communities, aged 10-70 years (188 males and 153 females). All subjects received scans of the cortical radius and tibia, and adults over the age of 19 received an additional scan of the phalanx. Associations between F- in drinking water and 24-h urine samples, and SOS as a measure of bone quality, were evaluated in bivariate and multivariable regressions adjusting for age, sex, BMI, smoking, and toothpaste use. RESULTS We found negative associations between F- exposure and bone quality at all three bones. Adult tibial SOS showed the strongest inverse association with F- exposure, which accounted for 20% of the variance in SOS measures (r = 0.45; n = 199; p < 0.0001). In adjusted analysis, a 1 mg/L increase in F- in drinking water was related to a reduction of 15.8 m/s (95% CI: -21.3 to -10.3), whereas a 1 mg/L increase in 24-h urinary F- (range: 0.04-39.5 mg/L) was linked to a reduction of 8.4 m/s (95% CI: -12.7, -4.12) of adult tibial SOS. Among adolescents, in contrast, weaker and non-significant inverse associations between F- exposure and SOS were found, while age, gender, and BMI were more significant predictors than in adults. CONCLUSIONS These results are indicative of a fluoride-induced deterioration of bone quality in humans, likely reflecting a combination of factors related to SOS: net bone loss, abnormal mineralization and collagen formation, or altered microarchitecture. The portable and low-cost ultrasound technique appears potentially useful for assessment of bone quality, and should be tested in other locations and for other bone-related disorders, to assess the feasibility of its more extensive diagnostic use in hard-to-reach rural regions.
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Key Words
- BMI, Body Mass Index
- Bone biomarker
- Bone quality
- Ethiopian Rift Valley
- F-, qFluoride
- Fluoride exposure
- IRB, Institutional Review Board
- ISE, Ion Selective Electrode
- MER, Main Ethiopian Rift
- NOAEL, No-Observed-Adverse-Effects-Level
- Quantitative ultrasound
- SOS, Speed of Sound
- Speed of sound
- TISAB, Total Ionic Strength Adjuster Buffer
- U.S. EPA, U.S. Environmental Protection Agency
- U.S. NRC, U.S. National Research Institute
- WHO, World Health Organization
- bw, body weight
- mg/L, milligram per liter
- mg/kg bw/day, milligram per kilogram body weight per day
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Affiliation(s)
- Tewodros Rango Godebo
- Department of Environmental Health Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112 USA
| | - Marc Jeuland
- Sanford School of Public Policy, Duke University, Durham, NC 27708 USA
| | - Redda Tekle-Haimanot
- Department of Neurology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | - Arti Shankar
- Department of Biostatistics and Data Science, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112 USA
| | - Biniyam Alemayehu
- Department of Neurology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | - Getachew Assefa
- Department of Radiology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | - Gary Whitford
- Department of Oral Biology, College of Dental Medicine, Augusta University, Augusta, GA, USA
| | - Amy Wolfe
- Kentucky Geological Survey, University of Kentucky, KY, USA
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Ma Y, Yao Y, Zhong N, Angwa LM, Pei J. The dose-time effects of fluoride on the expression and DNA methylation level of the promoter region of BMP-2 and BMP-7 in rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2020; 75:103331. [PMID: 32004919 DOI: 10.1016/j.etap.2020.103331] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 10/21/2019] [Accepted: 01/22/2020] [Indexed: 06/10/2023]
Abstract
Skeletal fluorosis is a chronic metabolic bone disease caused by excessive exposed to fluoride. Recent studies have shown that fluoride causes abnormal bone metabolism through disrupting the expression of Bone Morphogenetic Proteins (BMPs). However, the relationship between fluoride and BMPs is not fully understood, and the mechanism of fluoride on BMPs expression is still unclear. This study investigated the dose-time effects of fluoride on BMP-2 and BMP-7 levels and DNA methylation status of the promoter regions of these two genes in peripheral blood of rats. Eighty Wistar male rats were randomly divided into four groups and treated for 1 month and 3 months with distilled water (control), 25 mg/L, 50 mg/L or 100 mg/L of sodium fluoride (NaF). Rats exposed to fluoride had higher protein expression of BMP-2 and BMP-7 in plasma at 1 month and 3 months. An increase in BMP-2 expression was also observed with an increase of fluoride exposure time. Significant hypomethylation was observed in 2 CpG sites (CpGs) of BMP-2 and 1 CpG site of BMP-7 promoter regions in the fluoride treatment groups. It concludes that fluoride has a dose-response effect on BMP-2 in fluorosis rats, and fluoride-induced hypomethylation of specific CpGs may play an essential role in the regulation of BMP-2 and BMP-7 expression in rats.
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Affiliation(s)
- Yongzheng Ma
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, People's Republic of China
| | - Yingjie Yao
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, People's Republic of China
| | - Nan Zhong
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, People's Republic of China
| | - Linet Musungu Angwa
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, People's Republic of China
| | - Junrui Pei
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, People's Republic of China.
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11
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Effect of fluoride on osteocyte-driven osteoclastic differentiation. Toxicology 2020; 436:152429. [PMID: 32156525 DOI: 10.1016/j.tox.2020.152429] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 11/24/2022]
Abstract
Excessive systemic uptake of inorganic fluorides causes disturbances of bone homeostasis. The mechanism of skeletal fluorosis is still uncertain. This study aimed to study the effect of fluoride on osteocyte-driven osteoclastogenesis and probe into the role of PTH in this process. IDG-SW3 cells seeded in collagen-coated constructs were developed into osteocyte-like cells through induction of mineral agents. Then, osteocyte-like cells were exposed to fluoride in the presence or absence of parathyroid hormone (PTH). Cell viability and their capacity to produce receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG) and sclerostin (SOST) were detected by MTT and Western blot assays, respectively. Finally, a transwell coculture system using osteocyte-like cells seeded in the low compartment, and osteoclast precursors added in the inserts was developed to observe the osteocyte-driven osteoclasogenesis response to fluoride with or without PTH, and the expression of molecules involved in this mechanism were measure by real time RT-PCR. Results showed that osteocytes withstood a toxic dose of fluoride, and yet PTH administration significantly reduced osteocytes viability. PTH amplified the effect of fluoride on the expression of osteoclastogenesis-related molecules in osteocyte, but did not enlarged the stimulating effect of fluoride on osteoclastogenesis drove by osteocyte coculture. Gene expression levels of TRAP, RANK, JNK and NFAtc1 significantly increased in fluoride affected osteoclast precursor cocultured with osteocyte-like cells. The impact of fluoride on osteocyte-driven osteoclast differentiation was stronger than that of PTH. In conclusion, osteocyte played a pivotal role on the mechanism underlying fluoride-affected osteoclastogenesis in which RANK-JNK-NFATc1 signaling pathway was involved, and PTH had a significant impact in this process.
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