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Drummond GWB, Takeshita WM, de Castro GM, Dos Santos JN, Cury PR, Renno ACM, Ribeiro DA. Could fluoride be considered a genotoxic chemical agent in vivo? A systematic review with meta-analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024; 34:1328-1341. [PMID: 36994717 DOI: 10.1080/09603123.2023.2194616] [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: 03/08/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
The goal of this study was to perform systematic review (SR) to investigate the scientific literature regarding the genotoxicity effects of fluoride exposure (FE). The search of databases used for this study was PubMed/Medline, SCOPUS and Web of Science. The quality of included studies was assessed using the EPHPP (Effective Public Health Practice Project). A total of 20 potentially relevant studies were selected for evaluating the genotoxicity induced by fluoride. Few studies have revealed that FE induces genotoxicity. A total of 14 studies demonstrated negative results whereas 6 studies did not. After reviewing the twenty studies, 1 was classified as weak, 10 were considered moderate and 9 were considered strong, according to the EPHPP. Taken together, it has been established that genotoxicity of fluoride is limited.
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Affiliation(s)
- Giovana Wagner Branda Drummond
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
| | - Wilton Mitsunari Takeshita
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University, UNESP, Araçatuba, SP, Brazil
| | - Glaucia Monteiro de Castro
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
| | | | | | - Ana Claudia Muniz Renno
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
| | - Daniel Araki Ribeiro
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
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Puizina Mladinic E, Puizina J, Gavic L, Tadin A. Clinical Prospective Assessment of Genotoxic and Cytotoxic Effects of Fluoride Toothpaste and Mouthwash in Buccal Mucosal Cells. Biomedicines 2022; 10:biomedicines10092206. [PMID: 36140304 PMCID: PMC9496030 DOI: 10.3390/biomedicines10092206] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/23/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Fluorides are an essential component of oral hygiene products used to prevent dental decay. Therefore, a question arises about the potential harms of joint use of fluoridated toothpaste and mouthwashes regarding the increased amount of fluoride in the oral mucosa. Methods: This prospective, double-blinded parallel randomized clinical trial was conducted using a buccal micronucleus cytome assay (BMCyt assay). Forty-one participants were randomly assigned to the two groups. All participants used the same kinds of toothpaste for 12 weeks, designed explicitly for this study (non-fluoride, 1050 ppm F, and 1450 ppm F each for 4 weeks). Simultaneously, during the 3 months of the research, one group used mouthwash with fluoride (450 ppm) and another without fluoride. The buccal mucosal sampling was taken before using the tested products and after 4, 8, and 12 weeks of their use. Results: The frequency of micronuclei and the majority of other scored endpoints from the BMCyt assay showed no statistically significant differences within and between the studied groups. Comparing two groups, only statistically significant increases in the number of cells with nuclear buds (p = 0.048) and karyorrhexis (p = 0.020) at four weeks of usage were observed in the group that used mouthwash with fluoride. Conclusion: On the basis of the results, it can be concluded that simultaneous application of fluoridated toothpaste and fluoride mouthwash does not lead to cytogenetic damage in buccal mucosal cells.
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Affiliation(s)
- Ema Puizina Mladinic
- Department of Maxillofacial Surgery, Clinical Hospital Centre Split, 21000 Split, Croatia
- School of Medicine, University of Split, 21000 Split, Croatia
| | - Jasna Puizina
- Department of Biology, Faculty of Science, University of Split, 21000 Split, Croatia
| | - Lidia Gavic
- Department of Maxillofacial Surgery, Clinical Hospital Centre Split, 21000 Split, Croatia
- Department of Restorative Dental Medicine and Endodontics, Study of Dental Medicine, School of Medicine, University of Split, 21000 Split, Croatia
| | - Antonija Tadin
- Department of Maxillofacial Surgery, Clinical Hospital Centre Split, 21000 Split, Croatia
- Department of Restorative Dental Medicine and Endodontics, Study of Dental Medicine, School of Medicine, University of Split, 21000 Split, Croatia
- Correspondence: ; Fax: +385-21557624
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Miranda GHN, Alencar de Oliveira Lima L, Bittencourt LO, dos Santos SM, Platini Caldas de Souza M, Nogueira LS, de Oliveira EHC, Monteiro MC, Dionizio A, Leite AL, Pessan JP, Buzalaf MAR, Lima RR. Effects of long-term fluoride exposure are associated with oxidative biochemistry impairment and global proteomic modulation, but not genotoxicity, in parotid glands of mice. PLoS One 2022; 17:e0261252. [PMID: 35085268 PMCID: PMC8794182 DOI: 10.1371/journal.pone.0261252] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 11/25/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Fluoride has become widely used in dentistry because of its effectiveness in caries control. However, evidence indicates that excessive intake interferes with the metabolic processes of different tissues. Thus, this study aimed to investigate the effects of long-term exposure to F on the parotid salivary gland of mice, from the analysis of oxidative, proteomic and genotoxic parameters. MATERIALS AND METHODS The animals received deionized water containing 0, 10 or 50 mg/L of F, as sodium fluoride, for 60 days. After, parotid glands were collected for analysis of oxidative biochemistry, global proteomic profile, genotoxicity assessment and histopathological analyses. RESULTS The results revealed that exposure to fluoride interfered in the biochemical homeostasis of the parotid gland, with increased levels of thiobarbituric acid reactive species and reduced glutathione in the exposed groups; as well as promoted alteration of the glandular proteomic profile in these groups, especially in structural proteins and proteins related to oxidative stress. However, genotoxic assessment demonstrated that exposure to fluoride did not interfere with DNA integrity in these concentrations and durations of exposure. Also, it was not observed histopathological alterations in parotid gland. CONCLUSIONS Thus, our results suggest that long-term exposure to fluoride promoted modulation of the proteomic and biochemical profile in the parotid glands, without inducing damage to the genetic component. These findings reinforce the importance of rationalizing the use of fluorides to maximize their preventative effects while minimizing the environmental risks.
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Affiliation(s)
- Giza Hellen Nonato Miranda
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Belém, PA, Brazil
| | | | - Leonardo Oliveira Bittencourt
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Belém, PA, Brazil
| | - Sávio Monteiro dos Santos
- Laboratory of Clinical Immunology and Oxidative Stress, Pharmacy Faculty, Institute of Health Science, Federal University of Pará, Belém, PA, Brazil
| | | | | | | | - Marta Chagas Monteiro
- Laboratory of Clinical Immunology and Oxidative Stress, Pharmacy Faculty, Institute of Health Science, Federal University of Pará, Belém, PA, Brazil
| | - Aline Dionizio
- Department of Biological Sciences, Bauru Dental School, University of São Paulo, Bauru, SP, Brazil
| | - Aline Lima Leite
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, United States of America
| | - Juliano Pelim Pessan
- Department of Preventive and Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | | | - Rafael Rodrigues Lima
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Belém, PA, Brazil
- * E-mail:
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He M, Lyu X. Application of BRAFO-tiered approach for health benefit-risk assessment of dark tea consumption in China. Food Chem Toxicol 2021; 158:112615. [PMID: 34656696 DOI: 10.1016/j.fct.2021.112615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 09/09/2021] [Accepted: 10/12/2021] [Indexed: 11/17/2022]
Abstract
Dark tea, a unique tea fermented primarily in China, has numerous potential beneficial effects. However, harmful substances present in dark tea have provoked significant concern. To conduct a quantitative benefit-risk assessment of dark tea for Chinese residents and provide guidance on rational consumption, a framework of Benefit-Risk Analysis for Foods (BRAFO) and meta-analysis was applied to construct a disability-adjusted life year (DALY). Based on the BRAFO-tiered approach, a reference scenario (no intake) and an alternative scenario (intake of 3 cups/day) were determined. The overall health impacts of dark tea were simulated by comparing the risks of fluoride and AF with benefits of reduced-risk to coronary heart disease (CHD) and diabetes in different scenarios. Three cups of fermented tea consumed per day decreased risks of CHD and diabetes by 8.16% and 12.77% respectively. After quantitative integration of information, the ultimate net health effect was found to be -1958.827 illustrating that the benefits of drinking three cups of dark tea per day outweigh the risks. However, considering the uncertainties in the process, decision-makers should proceed with caution, consulting additional well-conducted studies and further managing harmful substances in dark tea.
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Affiliation(s)
- Mengru He
- Department of Nutrition and Food Hygiene, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, China
| | - Xiaohua Lyu
- Department of Nutrition and Food Hygiene, West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, China.
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Radovanović J, Antonijević B, Kolarević S, Milutinović-Smiljanić S, Mandić J, Vuković-Gačić B, Bulat Z, Ćurčić M, Kračun-Kolarević M, Sunjog K, Kostić-Vuković J, Marić JJ, Antonijević-Miljaković E, Đukić-Ćosić D, Djordjevic AB, Javorac D, Baralić K, Mandinić Z. Genotoxicity of fluoride subacute exposure in rats and selenium intervention. CHEMOSPHERE 2021; 266:128978. [PMID: 33298328 DOI: 10.1016/j.chemosphere.2020.128978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/09/2020] [Accepted: 11/12/2020] [Indexed: 06/12/2023]
Abstract
The aims of this study were to: (i) examine the toxic effects of sodium fluoride (NaF) in blood, liver, spleen, and brain cells of Wistar rats after the subacute exposure; (ii) explore the potential protective properties of selenium (Se) against fluoride toxicity after the simultaneous administration. Twenty male Wistar rats, eight weeks old, weighing approximately 140-190 g, were divided into four experimental groups (n = 5) as follows: I control-tap water; II NaF 150 ppm; III NaF 150 ppm and Se 1.5 mg/L; IV Se 1.5 mg/L, and had available water with solutions ad libitum for 28 days. DNA damage detected by comet assay was confirmed in the liver, spleen, and brain cells, but not in blood. Selenium supplementation together with NaF decreased DNA damage in liver and spleen cells. According to the histological findings, no changes were observed in spleen and brain tissues after NaF administration. Unlike the observed Se protective effect on the DNA level, no significant reduction of liver tissue injury was observed after the NaF and Se treatment, resulting in mild inflammation. Data of this study suggest that DNA damage after NaF subacute exposure at moderately high concentration was reduced in liver and spleen cells due to Se supplementation, but a similar change was not seen in the brain.
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Affiliation(s)
- Jelena Radovanović
- Clinic for Paediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, 11000, Belgrade, Serbia; Department of Radiobiology and Molecular Genetics, "Vinča" Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade, 11000, Belgrade, Serbia
| | - Biljana Antonijević
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Stoimir Kolarević
- Department for Hydroecology and Water Protection, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade, 11000, Belgrade, Serbia; Chair of Microbiology, Center for Genotoxicology and Ecogenotoxicology, Faculty of Biology, University of Belgrade, 11000, Belgrade, Serbia
| | | | - Jelena Mandić
- Clinic for Paediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, 11000, Belgrade, Serbia
| | - Branka Vuković-Gačić
- Chair of Microbiology, Center for Genotoxicology and Ecogenotoxicology, Faculty of Biology, University of Belgrade, 11000, Belgrade, Serbia
| | - Zorica Bulat
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Marijana Ćurčić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Margareta Kračun-Kolarević
- Department for Hydroecology and Water Protection, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade, 11000, Belgrade, Serbia
| | - Karolina Sunjog
- Department of Biology and Inland Waters Protection, Institute for Multidisciplinary Research, University of Belgrade, 11000, Belgrade, Serbia
| | - Jovana Kostić-Vuković
- Department of Biology and Inland Waters Protection, Institute for Multidisciplinary Research, University of Belgrade, 11000, Belgrade, Serbia
| | - Jovana Jovanović Marić
- Department for Hydroecology and Water Protection, Institute for Biological Research "Siniša Stanković", National Institute of Republic of Serbia, University of Belgrade, 11000, Belgrade, Serbia; Chair of Microbiology, Center for Genotoxicology and Ecogenotoxicology, Faculty of Biology, University of Belgrade, 11000, Belgrade, Serbia
| | - Evica Antonijević-Miljaković
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Danijela Đukić-Ćosić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Aleksandra Buha Djordjevic
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Dragana Javorac
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Katarina Baralić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade-Faculty of Pharmacy, 11000, Belgrade, Serbia
| | - Zoran Mandinić
- Clinic for Paediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, 11000, Belgrade, Serbia.
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Erkan M, Aydin Y, Orta Yilmaz B, Yildizbayrak N. Protective effects of vitamin C against fluoride toxicity. Toxicology 2021. [DOI: 10.1016/b978-0-12-819092-0.00043-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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7
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Dey Bhowmik A, Chattopadhyay A. A review on fluoride induced organotoxicity and genotoxicity in mammals and zebrafish. THE NUCLEUS 2019. [DOI: 10.1007/s13237-019-00272-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Ribeiro DA, Yujra VQ, da Silva VHP, Claudio SR, Estadella D, de Barros Viana M, Oshima CTF. Putative mechanisms of genotoxicity induced by fluoride: a comprehensive review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15254-15259. [PMID: 28477256 DOI: 10.1007/s11356-017-9105-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/24/2017] [Indexed: 06/07/2023]
Abstract
Genotoxicity is the ability of an agent to produce damage on the DNA molecule. Considering the strong evidence for a relationship between genetic damage and carcinogenesis, to elucidate the putative mechanisms of genotoxicity induced by fluoride are important to measure the degree of risk involved to human populations. The purpose of this article is to provide a comprehensive review on genotoxicity induced by fluoride on the basis of its mechanisms of action. In the last 10 years, all published data showed some evidence related to genotoxicity, which is due to mitochondrial disruption, oxidative stress, and cell cycle disturbances. However, this is an area that still requires a lot of investigation since the published data are not sufficient for clarifying the genotoxicity induced by fluoride. Certainly, the new information will be added to those already established for regulatory purposes as a safe way to promote oral healthcare and prevent oral carcinogenesis.
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Affiliation(s)
- Daniel Araki Ribeiro
- Department of Pathology, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil.
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil.
- Departamento de Biociências, Universidade Federal de São Paulo, UNIFESP, Av. Ana Costa, 95, Vila Mathias, Santos, SP, 11060-001, Brazil.
| | - Veronica Quispe Yujra
- Department of Pathology, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
| | | | - Samuel Rangel Claudio
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
| | - Debora Estadella
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, SP, Brazil
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9
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Leite ADL, Santiago JF, Levy FM, Maria AG, Fernandes MDS, Salvadori DMF, Ribeiro DA, Buzalaf MAR. Absence of DNA damage in multiple organs (blood, liver, kidney, thyroid gland and urinary bladder) after acute fluoride exposure in rats. Hum Exp Toxicol 2016; 26:435-40. [PMID: 17623768 DOI: 10.1177/0960327107076288] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Fluoride has been widely used in dentistry as a caries prophylactic agent. However, there has been some speculation that excess fluoride could cause an impact on genome integrity. In the current study, the potential DNA damage associated with exposure to fluoride was assessed in cells of blood, liver, kidney, thyroid gland and urinary bladder by the single cell gel (comet) assay. Male Wistar rats aging 75 days were distributed into seven groups: Groups 1 (control), 2, 3, 4, 5, 6 and 7 received 0 (deionized water), 10, 20, 40, 60, 80 and 100 mgF/Kg body weight from sodium fluoride (NaF), respectively, by gastrogavage. These groups were killed at 2 h after the administration of the fluoride doses. The level of DNA strand breaks did not increase in all organs evaluated and at all doses of NaF tested, as depicted by the mean tail moment. Taken together, our results suggest that oral exposure to NaF did not result in systemic genotoxic effect in multiple organs related to fluoride toxicity. Since DNA damage is an important step in events leading to carcinogenesis, this study represents a relevant contribution to the correct evaluation of the potential health risk associated with chemical exposure. Human & Experimental Toxicology ( 2007) 26, 435—440
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Affiliation(s)
- Aline de Lima Leite
- Department of Biological Sciences, Bauru Dental School, University of São Paulo, USP, 17012-901 Bauru, SP, Brazil
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Suzuki M, Bandoski C, Bartlett JD. Fluoride induces oxidative damage and SIRT1/autophagy through ROS-mediated JNK signaling. Free Radic Biol Med 2015; 89:369-78. [PMID: 26431905 PMCID: PMC4684823 DOI: 10.1016/j.freeradbiomed.2015.08.015] [Citation(s) in RCA: 167] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 08/20/2015] [Accepted: 08/28/2015] [Indexed: 02/07/2023]
Abstract
Fluoride is an effective caries prophylactic, but at high doses can also be an environmental health hazard. Acute or chronic exposure to high fluoride doses can result in dental enamel and skeletal and soft tissue fluorosis. Dental fluorosis is manifested as mottled, discolored, porous enamel that is susceptible to dental caries. Fluoride induces cell stress, including endoplasmic reticulum stress and oxidative stress, which leads to impairment of ameloblasts responsible for dental enamel formation. Recently we reported that fluoride activates SIRT1 and autophagy as an adaptive response to protect cells from stress. However, it still remains unclear how SIRT1/autophagy is regulated in dental fluorosis. In this study, we demonstrate that fluoride exposure generates reactive oxygen species (ROS) and the resulting oxidative damage is counteracted by SIRT1/autophagy induction through c-Jun N-terminal kinase (JNK) signaling in ameloblasts. In the mouse-ameloblast-derived cell line LS8, fluoride induced ROS, mitochondrial damage including cytochrome-c release, up-regulation of UCP2, attenuation of ATP synthesis, and H2AX phosphorylation (γH2AX), which is a marker of DNA damage. We evaluated the effects of the ROS inhibitor N-acetylcysteine (NAC) and the JNK inhibitor SP600125 on fluoride-induced SIRT1/autophagy activation. NAC decreased fluoride-induced ROS generation and attenuated JNK and c-Jun phosphorylation. NAC decreased SIRT1 phosphorylation and formation of the autophagy marker LC3II, which resulted in an increase in the apoptosis mediators γH2AX and cleaved/activated caspase-3. SP600125 attenuated fluoride-induced SIRT1 phosphorylation, indicating that fluoride activates SIRT1/autophagy via the ROS-mediated JNK pathway. In enamel organs from rats or mice treated with 50, 100, or 125 ppm fluoride for 6 weeks, cytochrome-c release and the DNA damage markers 8-oxoguanine, p-ATM, and γH2AX were increased compared to those in controls (0 ppm fluoride). These results suggest that fluoride-induced ROS generation causes mitochondrial damage and DNA damage, which may lead to impairment of ameloblast function. To counteract this impairment, SIRT1/autophagy is induced via JNK signaling to protect cells/ameloblasts from fluoride-induced oxidative damage that may cause dental fluorosis.
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Affiliation(s)
- Maiko Suzuki
- Department of Mineralized Tissue Biology, The Forsyth Institute & Harvard School of Dental Medicine, 245 First Street, Cambridge, MA
| | - Cheryl Bandoski
- Department of Mineralized Tissue Biology, The Forsyth Institute & Harvard School of Dental Medicine, 245 First Street, Cambridge, MA
| | - John D Bartlett
- Department of Mineralized Tissue Biology, The Forsyth Institute & Harvard School of Dental Medicine, 245 First Street, Cambridge, MA.
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Flora SJS, Mittal M, Pachauri V, Dwivedi N. A possible mechanism for combined arsenic and fluoride induced cellular and DNA damage in mice. Metallomics 2012; 4:78-90. [DOI: 10.1039/c1mt00118c] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Improvement of in vivo genotoxicity assessment: Combination of acute tests and integration into standard toxicity testing. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2011; 723:108-20. [DOI: 10.1016/j.mrgentox.2010.12.005] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Accepted: 12/10/2010] [Indexed: 01/15/2023]
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13
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Jin M, Dewa Y, Kawai M, Nishimura J, Saegusa Y, Kemmochi S, Harada T, Shibutani M, Mitsumori K. Induction of liver preneoplastic foci in F344 rats subjected to 28-day oral administration of diheptyl phthalate and its in vivo genotoxic potential. Toxicology 2009; 264:16-25. [DOI: 10.1016/j.tox.2009.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 07/10/2009] [Accepted: 07/10/2009] [Indexed: 01/21/2023]
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Ribeiro DA, de Oliveira G, de Castro G, Angelieri F. Cytogenetic biomonitoring in patients exposed to dental X-rays: comparison between adults and children. Dentomaxillofac Radiol 2008; 37:404-7. [PMID: 18812603 DOI: 10.1259/dmfr/58548698] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The aim of the present study was to comparatively evaluate the DNA damage (micronucleus) and cellular death (pyknosis, karyolysis and karyorrhexis) of exfoliated buccal mucosa cells from children and adults following dental X-ray exposure. METHODS A total of 17 adults and 17 children submitted to panoramic dental radiography were included in this study. RESULTS The results indicated no statistically significant differences (P > 0.05) in children's micronucleated oral mucosa cells before and after dental X-ray exposure. In the same way, no mutagenic effects were observed in adults following X-ray exposure. On the other hand, X-rays increased other nuclear alterations closely related to cytotoxicity such as karyorrhexis, pyknosis and karyolysis in both groups. The comparative analysis between children and adults demonstrated no statistically significant differences in micronucleus frequency or cytotoxicity (P > 0.05). CONCLUSIONS In summary, these data indicate that dental paroramic radiography may not be a factor that induces chromosomal damage, but it is able to promote cytotoxicity. It seems that children are not more susceptible to the noxious activities induced by X-rays when compared with adults.
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Affiliation(s)
- D A Ribeiro
- Departamento de Biosiências, Universidade Federal de São Paulo - UNIFESP, Av. Ana Costa 95, 11060-001, Santos - SP, Brazil.
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“Risk assessment of oral cancer in patients with pre-cancerous states of the oral cavity using micronucleus test and challenge assay” [Saran R, Tiwari RK, Reddy PP, Ahuja YR. Oral Oncol 2008;44:354–60]. Oral Oncol 2008; 44:716-7. [DOI: 10.1016/j.oraloncology.2007.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2007] [Revised: 12/11/2007] [Accepted: 12/11/2007] [Indexed: 11/22/2022]
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16
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Evaluation of the ability of a battery of three in vitro genotoxicity tests to discriminate rodent carcinogens and non-carcinogens. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2008; 654:114-32. [DOI: 10.1016/j.mrgentox.2008.05.002] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2008] [Revised: 05/03/2008] [Accepted: 05/09/2008] [Indexed: 11/24/2022]
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17
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Angelieri F, de Oliveira GR, Sannomiya EK, Ribeiro DA. DNA damage and cellular death in oral mucosa cells of children who have undergone panoramic dental radiography. Pediatr Radiol 2007; 37:561-5. [PMID: 17453188 DOI: 10.1007/s00247-007-0478-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Revised: 02/22/2007] [Accepted: 03/23/2007] [Indexed: 11/26/2022]
Abstract
BACKGROUND Despite wide use as a diagnostic tool in medical and dental practice, radiography can induce cytotoxic effects and genetic damage. OBJECTIVE To evaluate DNA damage (micronucleus) and cellular death (pyknosis, karyolysis and karyorrhexis) in exfoliated buccal mucosa cells taken from healthy children following exposure to radiation during dental radiography. MATERIALS AND METHODS A total of 17 children who had undergone panoramic dental radiography were included. RESULTS We found no statistically significant differences (P > 0.05) between micronucleated oral mucosa cells in children before and after exposure to radiation. On the other hand, radiation did cause other nuclear alterations closely related to cytotoxicity including karyorrhexis, pyknosis and karyolysis. CONCLUSION Taken together, these results indicate that panoramic dental radiography might not induce chromosomal damage, but may be cytotoxic. Overall, the results reinforce the importance of evaluating the health side effects of radiography and contribute to the micronucleus database, which will improve our understanding and practice of this methodology in children.
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Affiliation(s)
- Fernanda Angelieri
- Department of Orthodontics, São Paulo Metodista University (UMESP), São Bernardo do Campo, São Paulo, Brazil
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Ribeiro DA, Marques MEA, Salvadori DMF. Lack of effect of prior treatment with fluoride on genotoxicity of two chemical agents in vitro. Caries Res 2007; 41:239-43. [PMID: 17426407 DOI: 10.1159/000099326] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Accepted: 11/22/2006] [Indexed: 11/19/2022] Open
Abstract
The goal of this study was to investigate the ability of fluoride to modulate the genotoxic effects induced by the oxidative agent hydrogen peroxide (H2O2) and the alkylating agent methyl methanesulfonate (MMS) in vitro by the single-cell gel (comet) assay. Chinese hamster ovary cells were exposed in culture for 1 h at 37 degrees C to sodium fluoride at 7-100 microg/ml. NaF-treated and control cells were then incubated with 0-10 microM MMS in phosphate-buffered saline (PBS) for 15 min at 37 degrees C, or 0-100 microM H2O2 in distilled water for 5 min on ice. Negative control cells were treated with PBS for 1 h at 37 degrees C. Clear concentration-related effects were observed for the two genotoxins. Increase of DNA damage induced by either MMS or H2O2 was not significantly altered by pretreatment with NaF. The data indicate that NaF does not modulate alkylation-induced genotoxicity or oxidative DNA damage as measured by the single-cell gel (comet) assay.
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Affiliation(s)
- D A Ribeiro
- Department of Pathology, Botucatu Medical School, São Paulo State University, UNESP, São Paulo, SP, Brazil.
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Ribeiro DA, Hirota L, Cestari TM, Ceolin DS, Taga R, Assis GF. Ultrastructural morphometric analysis of ameloblasts exposed to fluoride during tooth development. J Mol Histol 2006; 37:361-7. [PMID: 17077986 DOI: 10.1007/s10735-006-9065-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Accepted: 10/02/2006] [Indexed: 10/24/2022]
Abstract
Since a considerable amount of the world population is exposed to high doses of fluoride, it is of special concern to investigate its action mechanisms during dental enamel development. In this study, the toxicity of fluoride in ameloblasts during enamel development was evaluated by means of ultrastructural morphometric analysis. A total of 18 male Wistar rats were distributed into three groups. In Group I, the animals received deionized drinking water ad libitum (negative control) and in Groups II and III, they received sodium fluorided (NaF) drinking water at doses of 7 and 100 ppm ad libitum, respectively, for 6 weeks. Morphometric data were expressed as volume density of the most significant organelles present in the secretory and maturation phases of amelogenesis such as RER, granules, lysosomes, phagic vacuoles, microfilaments and mitochondria. The results showed that the volume density of mitochondria in the 100 ppm experimental group was 29% (P < 0.05) higher than the control group in secretory ameloblasts. No remarkable differences were found in maturation ameloblasts for all organelles evaluated. Taken together, these data indicate that NaF at high doses is able to induce cellular damage in secretory ameloblasts, whereas no noxious effect was observed during maturation stage of amelogenesis as depicted by ultrastructural analysis.
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Affiliation(s)
- Daniel A Ribeiro
- Department of Health Sciences, Federal University of Sao Paulo, Av. Ana Costa 95, Santos 110601-001, SP, Brazil.
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Ribeiro DA, Marques MEA, Salvadori DMF. Antimicrobial endodontic compounds do not modulate alkylation-induced genotoxicity and oxidative stress in vitro. ACTA ACUST UNITED AC 2006; 102:e32-6. [PMID: 16876042 DOI: 10.1016/j.tripleo.2005.11.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Revised: 11/19/2005] [Accepted: 11/28/2005] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To investigate if formocresol, paramonochlorophenol, or calcium hydroxide modulate the genotoxic effects induced by the oxidatively damaging agent hydrogen peroxide (H2O2) or the alkylating agent methyl methanesulfonate (MMS) in vitro by using single cell gel (comet) assay. STUDY DESIGN Chinese hamster ovary (CHO) cells in culture were exposed directly to formocresol, paramonochlorophenol, or calcium hydroxide (adjusted to 100 microg/mL) for 1 hour at 37 degrees C. Subsequently the cultures were incubated with increasing concentrations (0-10 micromol/L) of MMS in phosphate-buffered solution (PBS) for 15 minutes at 37 degrees C or of H2O2 at increasing concentrations (0-100 micromol/L) in distilled water for 5 minutes on ice. The negative control cells were treated with PBS for 1 hour at 37 degrees C. The parameter from the comet assay (tail moment) was assessed by the Kruskal-Wallis nonparametric test followed by a post hoc analysis (Dunn test). RESULTS Clear concentration-related effects were observed for the genotoxin-exposed CHO cells. Increase of MMS-induced DNA damage was not significantly altered by the presence of the compounds tested. Similarly, no significant changes were observed when hydrogen peroxide was used with the endodontic compounds evaluated. CONCLUSION Formocresol, paramonochlorophenol, and calcium hydroxide are not able to modulate alkylation-induced genotoxicity or oxidative DNA damage as depicted by the single cell gel (comet) assay.
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Affiliation(s)
- Daniel A Ribeiro
- Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP, São Paulo, Brazil.
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Ribeiro DA, Marques MEA, Salvadori DMF. Study of DNA damage induced by dental bleaching agents in vitro. Braz Oral Res 2006; 20:47-51. [PMID: 16729174 DOI: 10.1590/s1806-83242006000100009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dental bleaching is a simple and conservative procedure for aesthetic restoration of vital and non-vital discolored teeth. Nevertheless, a number of studies have demonstrated the risk of tissue damage from the contact of these agents with the oral mucosa. In the current study, the genotoxic potential associated with exposure to dental bleaching agents was assessed by the single cell gel (comet) assay in vitro. Chinese hamster ovary (CHO) cells in vitro were exposed to six commercial dental bleaching agents (Clarigel Gold - Dentsply; Whitespeed - Discus Dental; Nite White - Discus Dental; Magic Bleaching - Vigodent; Whiteness HP - FGM and Lase Peroxide - DMC). The results pointed out that all dental bleaching agents tested contributed to DNA damage as depicted by the mean tail moment, being the strongest effect observed with the highest dose of hydrogen peroxide (Whiteness HP and Lase Peroxide, at a 35% concentration). On the other hand, Magic Bleaching (Vigodent) induced the lowest level of DNA breakage. Negative and positive controls displayed absence and presence of DNA-damaging, respectively. Taken together, these results suggest that dental bleaching agents may be a factor that increases the level of DNA damage. A higher concentration of hydrogen peroxide produced higher noxious activities in the genome as detected by single cell gel (comet) assay.
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Affiliation(s)
- Daniel Araki Ribeiro
- Center for Genotoxins and Carcinogens Evaluation (TOXICAN) - Department of Pathology, Botucatu Medical School, São Paulo State University
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Braz MG, Camargo EA, Salvadori DMF, Marques MEA, Ribeiro DA. Evaluation of genetic damage in human peripheral lymphocytes exposed to mineral trioxide aggregate and Portland cements. J Oral Rehabil 2006; 33:234-9. [PMID: 16512891 DOI: 10.1111/j.1365-2842.2005.01559.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
summary Mineral trioxide aggregate (MTA) and Portland cement are being used in dentistry as root-end-filling material for periapical surgery and for the sealing of communications between the root canal system and the surrounding tissues. However, genotoxicity tests for complete risk assessment of these compounds have not been conducted up to now. In the present study, the genotoxic effects of MTA and Portland cements were evaluated in peripheral lymphocytes from 10 volunteers by the alkaline single cell gel (comet) assay. The results pointed out that the single cell gel (comet) assay failed to detect the presence of DNA damage after a treatment of peripheral lymphocytes by MTA and Portland cements for concentrations up to 1000 mug mL(-1). In summary, our results indicate that exposure to MTA or Portland cements may not be a factor that increases the level of DNA lesions in human peripheral lymphocytes as detected by single cell gel (comet) assay.
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Affiliation(s)
- M G Braz
- Departamento de Patologia, Núcleo de Avaliação Toxicogenética e Cancerígena, TOXICAN, Faculdade de Medicina de Botucatu, UNESP, SP, Brazil
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Ribeiro DA, Marques MEA, Salvadori DMF. Assessment of genetic damage induced by dental bleaching agents on mouse lymphoma cells by single cell gel (comet) assay. J Oral Rehabil 2005; 32:766-71. [PMID: 16159356 DOI: 10.1111/j.1365-2842.2005.01500.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dental bleaching is a simple and conservative procedure for aesthetic restoration of vital discoloured teeth. However, dental bleaching agents may represent a hazard to human health, especially by causing DNA strand breaks. Genotoxicity tests form an important part of cancer research and risk assessment of potential carcinogens. In the current study, the genotoxic potential associated with exposure to dental bleaching agents was assessed by the single cell gel (comet) assay in vitro. Six commercial dental bleaching agents (Clarigel Gold - Dentsply; Whitespeed - Discus Dental; Nite White - Discus Dental; Magic Bleaching - Vigodent; Whiteness HP - FGM and Lase Peroxide - DMC) were exposed to mouse lymphoma cells in vitro. The results pointed out that all dental bleaching agents tested contributed to the DNA damage as depicted by the mean tail moment. Clear concentration-related effects were obtained for DNA damaging, being the strongest effect observed at the highest dose of the hydrogen peroxide (Whiteness HP and Lase Peroxide, at 35% concentration). On the contrary, Whitespeed (Discus Dental) induced the lowest level of DNA breakage. Taken together, these results suggest that dental bleaching agents may be a factor that increases the level of DNA damage as detected by the single cell gel (comet) assay.
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Affiliation(s)
- D A Ribeiro
- Department of Pathology, Center for Genotoxins and Carcinogens Evaluation, TOXICAN, Botucatu Medical School, UNESP, SP, Brazil.
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