Abstract
This study was conducted to measure the activity of the enzyme glutathione S-transferase (GST) in saliva and to compare the activity of this enzyme in children with and without dental fluorosis in communities with different concentrations of naturally fluoridated water. A total of 141 schoolchildren participated in this cross-sectional study. Children were selected from two communities: one with a low (0.4 ppm) and the other with a high (1.8 ppm) water fluoride concentration. Dental fluorosis was evaluated by applying the Thylstrup and Fejerskov Index (TFI) criteria. Stimulated saliva was obtained, and fluoride concentration and GST activity were measured. The GST activity was compared among children with different levels of dental fluorosis using multinomial logistic regression models and odds ratios (OR). The mean age of the children was 10.6 (±1.03) years. Approximately half of the children showed dental fluorosis (52.5 %). The average GST activity was 0.5678 (±0.1959) nmol/min/μg. A higher concentration of fluoride in the saliva was detected in children with a higher GST activity (p = 0.039). A multinomial logistic regression model used to evaluate the GST activity and the dental fluorosis score identified a strong association between TFI = 2–3 (OR = 15.44, p = 0.007) and TFI ≥ 4 (OR = 55.40, p = 0.026) and the GST activity level, compared with children showing TFI = 0–1, adjusted for age and sex. Schoolchildren with higher levels of dental fluorosis and a higher fluoride concentration in the saliva showed greater GST activity. The increased GST activity most likely was the result of the body’s need to inactivate free radicals produced by exposure to fluoride.
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Abbreviations
- CAT:
-
Catalase
- DM:
-
Diabetes mellitus
- GPx:
-
Glutathione peroxidase
- GSH:
-
Glutathione
- GST:
-
Glutathione S-transferase
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
- TFI:
-
Thylstrup and Fejerskov Index
- WHO:
-
World Health Organization
References
Verkerk RH (2010) The paradox of overlapping micronutrient risk and benefits obligates risk/benefit analysis. Toxicology 278:27–38
Abanto Alvarez AJ, Rezende KM, Marocho SM, Alves FB, Celiberti P, Ciamponi AL (2009) Dental fluorosis: exposure, prevention and management. Med Oral Patol Oral Cir Bucal 14(2):E103–E107
Chouhan S, Flora SJ (2008) Effects of fluoride on the tissue oxidative stress and apoptosis in rats: biochemical assay supported by IR spectroscopy data. Toxicology 254:61–67
Denbesten P, Li W (2011) Chronic fluoride toxicity: dental fluorosis. Monogr Oral Sci 22:81–96
Hartl G (2004) World Health Organization. WHO issues revised drinking water guidelines to help prevent water-related outbreaks and disease. Available from: http://www.who.int/mediacentre/news/releases/2004/pr67/en/. Accessed 10 Mar 2016
Beltrán-Valladares PR, Cocom-Tun H, Casanova-Rosado JF, Vallejos-Sánchez AA, Medina-Solís CE, Maupomé G (2005) Prevalence of dental fluorosis and additional sources of exposure to fluoride as risk factors to dental fluorosis in schoolchildren of Campeche, México. Rev Investig Clin 57(4):532–539
Huizar-Álvarez R, Varela-González G, Espinoza M (2014) Groundwater flow systems and fluoride content in the water of Tenextepango, Morelos, Mexico. Rev Mex Cienc Geol 31:238–247
Barbier O, Arreola-Mendoza L, Del Razo LM (2010) Molecular mechanisms of fluoride toxicity. Chem Biol Interact 188(2):319–313
Rashid K, Sinha K, Sil PC (2013) An update on oxidative stress-mediated organ pathophysiology. Food Chem Toxicol 62:584–600
Battino M, Ferreiro MS, Gallardo I, Newman HN, Bullon P (2002) The antioxidant capacity of saliva. J Clin Periodontol 29(3):189–194
Niki E (2010) Assessment of antioxidant capacity in vitro and in vivo. Free Radic Biol Med 49(4):503–515
Yuan L, Zhang L, Ma W, Zhou X, Ji J, Li N, et al. (2013) Glutathione S-transferase M1 and T1 gene polymosphisms with consumption of high fruit-juice and vegetable diet affect antioxidant capacity in healthy adults. Nutrition 29(7–8):965–971
Wei D, Zhang XL, Wang YZ, Yang CX, Chen G (2010) Lipid peroxidation levels, total oxidant status and superoxide dismutase in serum, saliva and gingival crevicular fluid in chronic periodontitis patients before and afther periodontal therapy. Aust Dent J 55(1):70–78
Livnat G, Bentur L, Kuzmisnsky E, Nagler RM (2010) Salivary profile and oxidative stress in children and adolescents with cystic fibrosis. J Oral Pathol Med 39(1):16–21
Reznick AZ, Shehadeh N, Shafir Y, Nagler RM (2006) Free radicals related effects and antioxidants in saliva and serum of adolescents with type 1 diabetes mellitus. Arch Oral Biol 51(8):640–648
Mahdy K, Abd-El-Shaheed A, Khadr ME, El-Shamy KA (2009) Antioxidant status and lipid peroxidation activity in evaluating hepatocellular damage in children. East Mediterr Health J 15(4):842–852
Mexican Official Standard NOM-012-SSA3–2012 (2013) Establishing the criteria for the implementation of health research projects in humans. Secretary of Health, México
Juárez-López M, Huizar-Álvarez R, Molina-Frechero N, Murrieta-Pruneda F, Cortés-Aguilera T (2011) Fluoride in water and dental fluorosis in a community of Queretaro state Mexico. J Environ Prot 2:744–749
Mexican Official Standard NOM-127-SSA1-1994 (1995) Environmental health, water for human consumption, water quality and permissible limits and drinking water treatment. Ministry of Health, Mexico
Kumar D, Pandey RK, Agrawal D, Agrawal D (2011) An estimation and evaluation of total antioxidant capacity of saliva in children with severe early childhood caries. Int J Paediatr Dent 21(6):459–464
Mandinic Z, Curcic M, Antonijevic B, Carevic M, Mandic J, Djukic-Cosic D, et al. (2010) Fluoride in drinking water and dental fluorosis. Sci Total Environ 408:3507–3512
Habig WH, Pabst MJ, Jakoby WB (1974) Glutathione S-transferases. The first enzymatic step in mercapturic acid formation. J Biol Chem 249:7130–7139
Gómez-Quiroz LE, Factor VM, Kaposi-Novak P, Coulouarn C, Conner EA, Thorgeirsson SS (2008) Hepatocyte-specific c-Met deletion disrupts redox homeostasis and sensitizes to Fas-mediated apoptosis. J Biol Chem 283(21):14581–14589
Aoba T, Fejerskov O (2002) Dental fluorosis: chemistry and biology. Crit Rev Oral Biol Med 13(2):155–170
Avezov K, Reznick AZ, Aizenbud D (2015) Oxidative stress in the oral cavity: sources and pathological outcomes. Respir Physiol Neurobiol 209:91–94
Deponte M (2013) Glutathione catalysis and the reaction mechanisms of glutathione-dependent enzymes. Biochim Biophys Acta 1830(5):3217–3266
Flora SJ, Mittal M, Mishra D (2009) Co-exposure to arsenic and fluoride on oxidative stress, glutathione linked enzymes, biogenic amines and DNA damage in mouse brain. J Neurol Sci 285(1–2):198–205
Muchandi S, Walimbe H, Bijle MN, Nankar M, Chaturvedi S, Karekar P (2015) Comparative evaluation and correlation of salivary total antioxidant capacity and salivary pH in caries-free and severe early childhood caries children. J Contemp Dent Pract 16(3):234–237
Tulunoglu O, Demirtas S, Tulunoglu I (2006) Total antioxidant levels of saliva in children related to caries, age and gender. Int J Paediatr Dent 16(3):186–191
Da Costa LA, García-Bailo B, Badawi A, El-Sohemy A (2012) Genetic determinats of dietary antioxidant status. Prog Mol Biol Transl Sci 108:179–200
Mousny M, Omelon S, Wise L, Everett ET, Dumitriu M, Holmyard DP, et al. (2008) Fluoride effects on bone formation and mineralization are influenced by genetics. Bone 43(6):1067–1074
Fukushima R, Pessan J, Sampaio F, Buzalaf M (2011) Factors associated with fluoride concentrations in whole and parotid ductal saliva. Caries Res 45:568–573
Varela-González G, García-Pérez A, Huizar-Álvarez R, Irigoyen-Camacho M, Espinoza-Jaramillo M (2013) Fluorosis and dental caries in the hydrogeological environments of southeastern communities in the state of Morelos, Mexico. J Environ Prot 4:994–1001
Wen D, Zhang F, Zhang E, Wang C, Han S, Zheng Y (2013) Arsenic, fluoride and iodine in groundwater of China. J Geochem Explor 135:1–21
Saldaña A (2013) Labor brokers in Morelos: supply of farm laborers in central and northwestern of Mexico. Estud Soc 22(43):138–158
National Institute of Statistics and Geography (INEGI) (2007) Agricultural landscape in Morelos. Agricultural census. Available from: http://internet.contenidos.inegi.org.mx/contenidos/productos//prod_serv/contenidos/espanol/bvinegi/productos/censos/agropecuario/2007/panora_agrop/mor/PanagroMor1.pdf. Accessed 07 Jun 2016
Federal Commission for the Protection against Sanitary Risk, Mexico (COFEPRIS) (2015) Fertilizers and pesticides. Available from: http://www.cofepris.gob.mx/AZ/Paginas/Plaguicidas%20y%20Fertilizantes/PlaguicidasYFertilizantes.aspx. Accessed 06 Jun 2016
Irigoyen-Camacho ME, García A, Mejía A, Huizar R (2016) Nutritional status and dental fluorosis among schoolchildren in communities with different drinking water fluoride concentrations in a central region in Mexico. Sci Total Environ 541:512–519
Boischio A (2013) World Health Organization. Fluoride in drinking water. Available from: http://www.paho.org/hq/index.php?option=com_content&view=article&id=8193%3A2013-fluor-agua-consumo&catid=4716%3Acontent&Itemid=39798&lang=es. Accessed 06 Jun 2016
Acknowledgments
This research is the result of a project by Irvin Fabian Bonola Gallardo to obtain the Ph.D. degree in the Doctorado en Ciencias Biológicas y de la Salud of Universidad Autónoma Metropolitana. Irvin Fabian Bonola Gallardo was supported by grant 216553 agreement: PFP-20-93 of CONACYT-México.
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The study fulfilled ethical codes (the Declaration of Helsinki and the official Mexican standard on health research [17]) and was conducted in accordance with good clinical practice standards. The study was approved by the scientific committee of the PhD Program in Biological and Health Sciences at the Autonomous Metropolitan University, Mexico. The ethical aspects of the protocol were reviewed and approved by this board (DCB.093.12).
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The authors declare that they have no competing interests.
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Informed consent was obtained from all individual participants included in the study.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Bonola-Gallardo, I., Irigoyen-Camacho, M.E., Vera-Robles, L. et al. Enzymatic Activity of Glutathione S-Transferase and Dental Fluorosis Among Children Receiving Two Different Levels of Naturally Fluoridated Water. Biol Trace Elem Res 176, 40–47 (2017). https://doi.org/10.1007/s12011-016-0806-0
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DOI: https://doi.org/10.1007/s12011-016-0806-0