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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. Int J Environ Health Res 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Abstract
Exposure of fluorine at toxic concentrations causes serious damage by accumulating in especially bones, kidneys, and other soft tissues. Fluorine at cytotoxic concentrations may cause DNA damage. This study aims to determine the level of DNA damage due to sodium fluoride (NaF) at different hours (3rd, 12th, and 24th hours) and in IC50 concentrations designated for each hour and reveal the protective effect of lycopene on possible damage. The best enhancer concentrations (1 μM) of microtitration (MTT) viability test and proliferation of lycopene and IC50 values of NaF at the 3rd, 12th, and 24th hour were 9600, 5500, and 3200 μM, respectively. DNA damage significantly increased in all NaF-treated groups in comparison with the control group (p < 0.05). DNA damage due to NaF+LYC application significantly decreased in comparison with the control group (p < 0.05). Lycopene application significantly increased the expression levels of the Ku70 and Ku80 genes which have a part in DNA repair (p < 0.05). The statistical data showed that application of lycopene which is an important antioxidant molecule may be beneficial for decreasing NaF-induced DNA damage. In conclusion, applying lycopene for cytotoxicity due to fluorine in NRK-52E cell line had different effects based on the dosage and time; thus, it can be a potential option for preventing fluorosis-induced toxicity and developing new treatment approaches.
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Affiliation(s)
- Sedat Çetin
- Faculty of Veterinary Medicine, Biochemistry Department, Van Yuzuncu Yil University, Van, Turkey.
| | - Ayşe Usta
- Faculty of Science, Chemistry Department, Van Yuzuncu Yil University, Van, Turkey
| | - Veysel Yüksek
- Özalp Vocational High School, Van Yuzuncu Yil University, Van, Turkey
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Abstract
In this review, genotoxic and mutagenic effects of teratogenic chemical agents in both rat and mouse have been reviewed. Of these chemicals, 97 are drugs and 33 are pesticides or belong to other groups. Large literature searches were conducted to determine the effects of chemicals on chromosome abnormalities, sister chromatid exchanges, and micronucleus formation in experimental animals such as rats and mice. In addition, studies that include unscheduled DNA synthesis, DNA adduct formations, and gene mutations, which help to determine the genotoxicity or mutagenicity of chemicals, have been reviewed. It has been estimated that 46.87% of teratogenic drugs and 48.48% of teratogenic pesticides are positive in all tests. So, all of the teratogens involved in this group have genotoxic and mutagenic effects. On the other hand, 36.45% of the drugs and 21.21% of the pesticides have been found to give negative results in at least one test, with the majority of the tests giving positive results. However, only 4.16% of the drugs and 18.18% of the pesticides were determined to give negative results in the majority of the tests. Among tests with major negative results, 12.50% of the teratogenic drugs and 12.12% of the teratogenic pesticides were negative in all conducted tests.
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Affiliation(s)
- Eyyüp Rencüzoğulları
- a Department of Biology, Faculty of Science and Letters , Adiyaman University , Adiyaman , Turkey
| | - Muhsin Aydın
- a Department of Biology, Faculty of Science and Letters , Adiyaman University , Adiyaman , Turkey
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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. Environ Sci Pollut Res Int 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Oyagbemi AA, Omobowale TO, Asenuga ER, Adejumobi AO, Ajibade TO, Ige TM, Ogunpolu BS, Adedapo AA, Yakubu MA. Sodium fluoride induces hypertension and cardiac complications through generation of reactive oxygen species and activation of nuclear factor kappa beta. Environ Toxicol 2017; 32:1089-1101. [PMID: 27378751 DOI: 10.1002/tox.22306] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 06/06/2016] [Accepted: 06/11/2016] [Indexed: 06/06/2023]
Abstract
Human exposure to sodium fluoride through its daily usage is almost inevitable. Cardiovascular and renal dysfunction has been associated with fluoride toxicity. Therefore, this study investigated the mechanism of action of sodium fluoride (NaF) induced hypertension and cardiovascular complications Forty male albino rats of an average of 10 rats per group were used. Group A received clean tap water. Toxicity was induced in Group B to D by administering graded doses of NaF through drinking water ad libitum for 10 days at 150 ppm, 300 ppm, and 600 ppm concentration respectively. Following administration of NaF, there was significant increase in systolic pressure, diastolic pressure and mean arterial pressure. Markers of oxidative stress; malondialdehyde, hydrogen peroxide, advance oxidation protein products, and protein carbonyl were significantly increased in dose-dependent pattern in the cardiac and renal tissues of rats together with significant decrease in the GST activity in NaF-treated rats compared to the control. Also serum markers of inflammation, cardiac, and renal damage including myeloperoxidase, xanthine oxidase, blood urea nitrogen, creatinine, Lactate dehydrogenase (LDH), and Creatinine kinase myocardial band (CK-MB) significantly increased indicating induction of oxidative stress, renal, and cardiac damage after exposure. Histopathology of the kidney and heart revealed aberrations in the histological architecture in NaF-treated rats. Also, immunohistochemistry showed higher expression of nuclear factor kappa beta (NF-kB) in the cardiac and renal tissues of rats administered NaF. Combining all, these results indicate NaF-induced hypertension through generation of reactive oxygen species and activation of renal and cardiac NF-kB expressions. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 1089-1101, 2017.
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Affiliation(s)
- Ademola Adetokunbo Oyagbemi
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Nigeria
| | | | | | | | - Temitayo Olabisi Ajibade
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Nigeria
| | - Temitope Moses Ige
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Nigeria
| | - Blessing Seun Ogunpolu
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Nigeria
| | - Adeolu Alex Adedapo
- Department of Veterinary Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, University of Ibadan, Nigeria
| | - Momoh Audu Yakubu
- Department of Environmental and Interdisciplinary Sciences, College of Science, Technology and Engineering, Texas Southern University, 3100 Cleburne Avenue, Houston, TX, 77004, USA
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7
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Campos-Pereira F, Lopes-Aguiar L, Renosto F, Nogueira G, Costa E, Barbieri Pulz R, Silva-Zacarin E, Oliveira C, Pigoso A, Severi-Aguiar G. Genotoxic effect and rat hepatocyte death occurred after oxidative stress induction and antioxidant gene downregulation caused by long term fluoride exposure. Chem Biol Interact 2017; 264:25-33. [DOI: 10.1016/j.cbi.2017.01.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 12/22/2016] [Accepted: 01/11/2017] [Indexed: 10/20/2022]
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Feng D, Huang H, Yang Y, Yan T, Jin Y, Cheng X, Cui L. Ameliorative effects of N-acetylcysteine on fluoride-induced oxidative stress and DNA damage in male rats’ testis. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2015; 792:35-45. [DOI: 10.1016/j.mrgentox.2015.09.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 09/11/2015] [Accepted: 09/15/2015] [Indexed: 12/21/2022]
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Tenorio NM, Ribeiro DA, Alvarenga TA, Fracalossi ACC, Carlin V, Hirotsu C, Tufik S, Andersen ML. The influence of sleep deprivation and obesity on DNA damage in female Zucker rats. Clinics (Sao Paulo) 2013; 68:385-9. [PMID: 23644860 PMCID: PMC3611896 DOI: 10.6061/clinics/2013(03)oa16] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 11/22/2012] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate overall genetic damage induced by total sleep deprivation in obese, female Zucker rats of differing ages. METHOD Lean and obese Zucker rats at 3, 6, and 15 months old were randomly distributed into two groups for each age group: home-cage control and sleep-deprived (N = 5/group). The sleep-deprived groups were deprived sleep by gentle handling for 6 hours, whereas the home-cage control group was allowed to remain undisturbed in their home-cage. At the end of the sleep deprivation period, or after an equivalent amount of time for the home-cage control groups, the rats were brought to an adjacent room and decapitated. The blood, brain, and liver tissue were collected and stored individually to evaluate DNA damage. RESULTS Significant genetic damage was observed only in 15-month-old rats. Genetic damage was present in the liver cells from sleep-deprived obese rats compared with lean rats in the same condition. Sleep deprivation was associated with genetic damage in brain cells regardless of obesity status. DNA damage was observed in the peripheral blood cells regardless of sleep condition or obesity status. CONCLUSION Taken together, these results suggest that obesity was associated with genetic damage in liver cells, whereas sleep deprivation was associated with DNA damage in brain cells. These results also indicate that there is no synergistic effect of these noxious conditions on the overall level of genetic damage. In addition, the level of DNA damage was significantly higher in 15-month-old rats compared to younger rats.
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Affiliation(s)
- Neuli M Tenorio
- Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Carlin V, Matsumoto MA, Saraiva PP, Artioli A, Oshima CTF, Ribeiro DA. Cytogenetic damage induced by mouthrinses formulations in vivo and in vitro. Clin Oral Investig 2011; 16:813-20. [DOI: 10.1007/s00784-011-0559-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Accepted: 04/18/2011] [Indexed: 11/30/2022]
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Nagaoka MR, Le Sueur-Maluf L, Aguiar O, Castro GM, Spadari-Bratfisch RC, Ribeiro DA. Differential response related to genotoxicity in multiple organs of cirrhotic rats. Hepatol Int 2011; 5:740-6. [PMID: 21484143 DOI: 10.1007/s12072-010-9239-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Accepted: 12/16/2010] [Indexed: 01/27/2023]
Abstract
PURPOSE The aim of this study was to use the single cell gel (comet) assay to investigate whether blood, liver, heart, kidney, and brain are particularly sensitive organs for DNA damage in cirrhotic rats to predict genetic instability induced by cirrhosis. METHODS A total of 16 male Wistar rats (negative control, n = 8; experimental, n = 8) were submitted to bile duct ligation during 28 days. RESULTS Cirrhosis was able to induce genetic damage in liver and brain cells, as depicted by the mean tail moment. No genetic damage was induced in blood, heart, or kidney cells (i.e., no significant statistically differences were noticed when compared with negative control). CONCLUSIONS In conclusion, our results suggest that cirrhosis could contribute to DNA damage in liver and brain cells.
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Affiliation(s)
- Marcia R Nagaoka
- Departamento de Biociências, Universidade Federal de Sao Paulo, UNIFESP, Santos, SP, Brazil
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Abstract
OBJECTIVES There is good evidence to suggest that human breast milk has antioxidant properties. Our primary goal was to investigate the antioxidant properties of human milk in a combined in vitro digestion/cell culture model that more closely replicates conditions in the gastrointestinal system of the preterm infant. MATERIALS AND METHODS An in vitro digestion model was developed that incorporates both gastric and intestinal phases, based on reported luminal pH, digestive enzyme levels, and transit times observed in preterm infants. To mimic the human intestinal mucosa, 2 cell lines--Caco-2BBE and HT29-MTX--were cocultured on Matrigel, an artificial basement membrane substrate. Intracellular oxidative stress was measured with 2 broadly selective oxidant-sensitive dyes, and oxidative DNA damage was assessed by means of single-cell gel electrophoresis. RESULTS Enterocyte differentiation and mucin secretion were observed by 14 seeding of cultures. Direct exposure to digested milk resulted in a loss of transepithelial electrical resistance; however, exogenous mucin mitigated this loss. Data suggested that both milk and digested milk alleviated oxidative stress in the coculture, and both reduced hydrogen peroxide-induced oxidative DNA damage, as demonstrated by the comet assay. CONCLUSIONS Our results support the hypothesis that breast milk reduces oxidative stress in a cell culture model representative of the intestinal mucosa, and also confirmed the suitability of this combined in vitro digestion/cell culture system for investigating the physiologic effects of enteral nutrients such as breast milk, under conditions similar to those existing in the gastrointestinal system of the preterm infant.
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Kahan V, Ribeiro DA, Andersen ML, Alvarenga TA, Tufik S. Sleep Loss Induces Differential Response Related To Genotoxicity in Multiple Organs of Three Different Mice Strains. Basic Clin Pharmacol Toxicol 2010; 107:598-602. [DOI: 10.1111/j.1742-7843.2010.00540.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Nishi EE, Campos RR, Bergamaschi CT, de Almeida VR, Ribeiro DA. Vitamin C prevents DNA damage induced by renovascular hypertension in multiple organs of Wistar rats. Hum Exp Toxicol 2010; 29:593-9. [PMID: 20053703 DOI: 10.1177/0960327109358267] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to investigate, through the single-cell gel (comet) assay, whether vitamin C is able to protect against renovascular hypertension-induced genotoxicity in multiple organs. A total of 32 male Wistar rats were divided into four groups: negative control (n = 6); animals treated with vitamin C (n = 6); hypertensive rats (n = 10) and hypertensive rats and treated with vitamin C (n = 10). Hypertension was induced as a result of partial obstruction of the left renal artery by means of a silver clip during 6 weeks. Vitamin C was administered at 150 mg/kg during 7 consecutive days before the end of the experimental period. The results showed that vitamin C was able to protect blood cells against hypertension-induced genotoxicity. Brain, liver and heart cells were also protected by vitamin C following hypertension-induced genotoxic damage. Regarding blood pressure, vitamin C reduced the hypertensive state. In conclusion, our results suggest that vitamin C can prevent hypertension-induced DNA damage in blood, liver, brain and heart cells as well as to normalize the blood pressure of rats.
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Affiliation(s)
- Erika Emy Nishi
- Department of Physiology, Cardiovascular Division, Paulista Medical School, Federal University of Sao Paulo, UNIFESP, SP, Brazil
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15
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Andersen ML, Ribeiro DA, Bergamaschi CT, Alvarenga TA, Silva A, Zager A, Campos RR, Tufik S. Distinct effects of acute and chronic sleep loss on DNA damage in rats. Prog Neuropsychopharmacol Biol Psychiatry 2009; 33:562-7. [PMID: 19258023 DOI: 10.1016/j.pnpbp.2009.02.014] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Revised: 02/20/2009] [Accepted: 02/20/2009] [Indexed: 01/20/2023]
Abstract
The aim of this investigation was to evaluate genetic damage induced in male rats by experimental sleep loss for short-term (24 and 96 h) and long-term (21 days) intervals, as well as their respective recovery periods in peripheral blood, brain, liver and heart tissue by the single cell gel (comet) assay. Rats were paradoxically deprived of sleep (PSD) by the platform technique for 24 or 96 h, or chronically sleep-restricted (SR) for 21 days. We also sought to verify the time course of their recovery after 24 h of rebound sleep. The results showed DNA damage in blood cells of rats submitted to PSD for 96 h. Brain tissue showed extensive genotoxic damage in PSD rats (both 24 and 96 h), though the effect was more pronounced in the 96 h group. Rats allowed to recover from the PSD-96 h and SR-21 days treatments showed DNA damage as compared to negative controls. Liver and heart did not display any genotoxicity activity. Corticosterone concentrations were increased after PSD (24 and 96 h) relative to control rats, whereas these levels were unaffected in the SR group. Collectively, these findings reveal that sleep loss was able to induce genetic damage in blood and brain cells, especially following acute exposure. Since DNA damage is an important step in events leading to genomic instability, this study represents a relevant contribution to the understanding of the potential health risks associated with sleep deprivation.
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Affiliation(s)
- M L Andersen
- Department of Psychobiology, Universidade Federal de São Paulo (UNIFESP), Brazil
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16
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Abstract
BACKGROUND Taking into consideration the strong evidence for a relationship between DNA damage and carcinogenesis, the aim of this study was to investigate whether blood, liver, heart, kidney and brain are particularly sensitive organs for DNA damaging during chronic renal disease by the single-cell gel (comet) assay to predict genetic instability induced by this pathological condition. METHODS A total of 18 male Wistar rats were divided into two groups: negative control (n = 8) and experimental (n = 10), in which was submitted to the 5/6 renal mass ablation by ligation of two or three branches of the left renal artery and total right nephrectomy during 8 weeks. RESULTS The results showed that chronic renal disease was able to induce genetic damage in blood, heart, liver and kidney cells as depicted by the mean tail moment. No genetic damage was induced in brain cells, i.e. no significant statistically differences (P > 0.05) were noticed when compared to negative control. CONCLUSION In conclusion, our results suggest that chronic renal failure could contribute to the damage of DNA at all organs evaluated, except to the brain cells. As 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 risks associated with kidney disease.
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Affiliation(s)
- D A Ribeiro
- Department of Biosciences, Federal University of Sao Paulo, UNIFESP, Santos, SP, Brazil.
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