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González-Martínez F, Gómez-Scarpetta R, Salcedo OB, Bermúdez-Reyes P, Castro-Villamizar P, Cerezo MDP, Martínez C, Tirado-Amador L, Salas-Zambrano A, Saldarriaga A, Sánchez-Molina M, Vila LA. Enamel fluorosis related with fluoride-containing water ingestion and urinary excretion in schoolchildren. J Clin Exp Dent 2024; 16:e51-e61. [PMID: 38314340 PMCID: PMC10837805 DOI: 10.4317/jced.61052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 10/23/2023] [Indexed: 02/06/2024] Open
Abstract
Background Natural water sources are considered as the major environmental exposure of fluoride, resulting in increased prevalence of enamel fluorosis. This type of natural exposure should be permanently monitored to avoid the interactions with other non-natural fluoride sources. We evaluated the prevalence of enamel fluorosis in Colombian schoolchildren and its relationship with fluoride-containing water ingestion exposure dose and urinary fluoride excretion. Material and Methods We included 923 schoolchildren aged 7-12 years residing in eight municipalities in Colombia. Sampling of consumption water was performed in major aquifers used for daily supply. Samples were collected in 98 polyethylene containers and refrigerated until analysis. Water and urine fluoride concentrations were measured using the fluoride selective electrode method. Enamel fluorosis was evaluated using Thylstrup and Ferjerskov Index (TFI). Demographic and anthropometric characteristics were assessed. Besides, other exposures to non-natural fluoride were also evaluated. Logistic regression was applied for multiple analyses. Results The median fluoride concentration in water and urine samples was 10.5 mg/L and 0.63 mg/L respectively, with the highest value found in Algarrobo-Magdalena, and the lowest value found in Manzanares-Caldas. The overall prevalence of enamel fluorosis was 86.1%, being more frequent the mild codes with TFI-1 to TFI-2. The highest prevalence was found in Margarita-Bolívar and Manzanares-Caldas, and the most severe codes (TFI-5 to TFI-9) were detected in Manzanares-Caldas. The multiple analysis revealed water ingestion exposure dose, urinary excretion, involuntary intake of toothpaste, amount of table salt consumption and sex as significant factors (p< 0.001). Conclusions The fluoride ingestion exposure dose and its subsequent urinary excretion could be used as estimators of past fluoride exposure, explaining the current prevalence of enamel fluorosis in Colombian schoolchildren. Key words:Fluoride, groundwater ingestion, enamel fluorosis, prevalence, severity.
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Affiliation(s)
- Farith González-Martínez
- DDS, MSPH, PhD. Public Health Research Group Universidad de Cartagena-Cartagena de Indias, Colombia
- Asociación Colombiana de Facultades de Odontología-Bogotá-ACFO, Colombia
- Latin American Network of Research on Fluorides and Dental Fluorosis, Cartagena 130014, Colombia
| | - Ruth Gómez-Scarpetta
- Latin American Network of Research on Fluorides and Dental Fluorosis, Cartagena 130014, Colombia
- BAM, MSc. Universidad Cooperativa de Colombia-Villavicencio, Colombia
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Velez-León E, Pacheco-Quito EM, Díaz-Dosque M, Tobar-Almache D. Worldwide Variations in Fluoride Content in Beverages for Infants. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1896. [PMID: 38136098 PMCID: PMC10741400 DOI: 10.3390/children10121896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/22/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023]
Abstract
In situations where breastfeeding is impractical, milk formulas have emerged as the primary choice for infant nutrition. Numerous global studies have scrutinized the fluoride content in these formulas, uncovering fluctuations in fluoride levels directly associated with the method of preparation. This variability poses a potential risk of elevated fluoride concentrations and, consequently, an increased susceptibility to dental fluorosis in infants. The primary objective of this review is to intricately delineate the fluoride content in dairy formulas and emphasize the variability of these values concerning their reconstitution process. The review's findings reveal that, among the 17 studies assessing fluoride levels in infant formula, milk-based formulas exhibit a range of 0.01-0.92 ppm, with only two studies exceeding 1.30 ppm. Conversely, soy-based formulas demonstrate values ranging from 0.13-1.11 ppm. In conclusion, the observed variability in fluoride levels in infant formulas is ascribed to the choice of the water source employed in the preparation process. This underscores the paramount importance of meticulously adhering to recommendations and guidelines provided by healthcare professionals concerning the utilization of these formulas and their meticulous reconstitution.
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Affiliation(s)
- Eleonor Velez-León
- Unidad Académica de Salud y Bienestar, Facultad de Odontología, Universidad Católica de Cuenca, Cuenca 010105, Ecuador;
- Grupo de Investigación Innovación y Desarrollo Farmacéutico en Odontología, Facultad de Odontología, Jefatura de Investigación e Innovación, Universidad Católica de Cuenca, Cuenca 010105, Ecuador
- Latin American Network of Research on Fluorides and Dental Fluorosis, Cartagena 130009, Colombia; (M.D.-D.); (D.T.-A.)
| | - Edisson-Mauricio Pacheco-Quito
- Unidad Académica de Salud y Bienestar, Facultad de Odontología, Universidad Católica de Cuenca, Cuenca 010105, Ecuador;
- Grupo de Investigación Innovación y Desarrollo Farmacéutico en Odontología, Facultad de Odontología, Jefatura de Investigación e Innovación, Universidad Católica de Cuenca, Cuenca 010105, Ecuador
- Latin American Network of Research on Fluorides and Dental Fluorosis, Cartagena 130009, Colombia; (M.D.-D.); (D.T.-A.)
| | - Mario Díaz-Dosque
- Latin American Network of Research on Fluorides and Dental Fluorosis, Cartagena 130009, Colombia; (M.D.-D.); (D.T.-A.)
- Laboratory of Pharmacology, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Olivos 943, Independencia, Santiago 8380544, Chile
| | - Daniela Tobar-Almache
- Latin American Network of Research on Fluorides and Dental Fluorosis, Cartagena 130009, Colombia; (M.D.-D.); (D.T.-A.)
- Laboratory of Pharmacology, Institute for Research in Dental Sciences (ICOD), Faculty of Dentistry, University of Chile, Olivos 943, Independencia, Santiago 8380544, Chile
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Zhang L, Li Y, Tao D, Yang L, Zhang Y, Zhang H, Xie C. The miR-34b-5p-negative target Gnai2 aggravates fluorine combined with aluminum-induced apoptosis of rat offspring hippocampal neurons and NG108-15 cells. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:66822-66839. [PMID: 37186186 DOI: 10.1007/s11356-023-27135-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 04/17/2023] [Indexed: 05/17/2023]
Abstract
It is known that fluorine and aluminum are commonly found in the environment and that long-term overexposure can adversely affect the organism's nervous system, damaging the structure and function of brain tissue. Our previous study showed that fluorine combined with aluminum (FA) could trigger apoptosis in vitro and cause spatial learning and memory impairment and differentially expressed miRNAs (including miR-34b-5p) in the hippocampi in vivo. However, the detailed mechanism is unclear. Learning memory damage is implicated in excessive hippocampal neuron apoptosis, and miR-34b-5p participates in regulating the hippocampal neuron apoptosis. Thus, in the current research, Sprague-Dawley (SD) rats were subjected to FA, and NG108-15 control cells and NG108-15 cells pretransfected with miR-34b-5p agomir or antagomir were exposed to FA. We found that FA triggered apoptosis of rat hippocampal neurons and NG108-15 cells, increased miR-34b-5p expression, and decreased Gnai2, PKA, ERK and CREB expression. Inhibition of miR-34b-5p alleviated FA-induced NG108-15 cell apoptosis and further increased Gnai2, PKA, ERK, and CREB expression, and vice versa. Furthermore, miR-34b-5p modulated the level of Gnai2 by directly targeting its 3'-untranslated region (UTR), as verified through the dual Luciferase reporter assay. These outcomes suggested that miR-34b-5p participated in FA-induced neuronal apoptosis by targeting Gnai2 negatively, thereby inhibiting the PKA/ERK/CREB signaling pathway.
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Affiliation(s)
- Luwen Zhang
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Yang Li
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Dan Tao
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Liu Yang
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Yue Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, 550025, China
| | - Hua Zhang
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Chun Xie
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China.
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Condò R, Carli E, Cioffi A, Cataldi ME, Quinzi V, Casaglia A, Giancotti A, Pirelli P, Lucarini I, Maita F, Maiolo L, Mampieri G. Fluorinated Agents Effects on Orthodontic Alloys: A Descriptive In Vitro Study. MATERIALS 2022; 15:ma15134612. [PMID: 35806740 PMCID: PMC9267448 DOI: 10.3390/ma15134612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/16/2022] [Accepted: 06/27/2022] [Indexed: 02/01/2023]
Abstract
Fluoride-based mouthwashes and gels are preventive measures in countering demineralization and caries but, modifying environmental acidity, can reduce the wet corrosion resistance of orthodontic alloys. To evaluate chemical stability, in vitro experiments were conducted on stainless steel and nickel–titanium wires, weighed before and after immersion in household fluorinated mouthwashes and gels, measuring weight variations and elution of metal ions from acid corrosion phenomena. Elution samples were analyzed by inductively coupled plasma mass spectrometry, detecting residual ion concentration, while surface changes were analyzed under scanning electron microscopy. Results showed stainless steel wires do not undergo significant erosion when exposed to most fluorinated mouthwashes but, at prolonged exposure, alloys elute gradually greater amounts of metals and Ni–Ti wires become more sensitive to some mouthwashes. Ions’ elution varies considerably, especially for Ni–Ti wires, if exposed to household fluorinated gels, for which significant negative values were obtained. Changes, affecting wires’ outer layer, negatively act on shiny appearance and luster, reducing corrosion resistance. Although examined orthodontic wires showed good chemical stability and low toxicity, surface corrosion from exposure to fluorinated agents was observed. Home use must be accompanied by clinician prescription and, for household dental gels, must follow manufacturers’ recommendations, ensuring prophylactic action without damaging alloys surfaces.
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Affiliation(s)
- Roberta Condò
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
- Correspondence: ; Tel.: +39-338-3393-285
| | - Elisabetta Carli
- Department of Surgical Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, 56126 Pisa, Italy;
| | - Alessandro Cioffi
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
| | - Maria Elena Cataldi
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
| | - Vincenzo Quinzi
- Department of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, 67100 L’Aquila, Italy;
| | - Adriano Casaglia
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
| | - Aldo Giancotti
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
| | - Paola Pirelli
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
| | - Ivano Lucarini
- Institute for Microelectronics and Microsystems—Unit of Rome, National Research Council, Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (I.L.); (F.M.); (L.M.)
| | - Francesco Maita
- Institute for Microelectronics and Microsystems—Unit of Rome, National Research Council, Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (I.L.); (F.M.); (L.M.)
| | - Luca Maiolo
- Institute for Microelectronics and Microsystems—Unit of Rome, National Research Council, Via del Fosso del Cavaliere 100, 00133 Rome, Italy; (I.L.); (F.M.); (L.M.)
| | - Gianluca Mampieri
- Department of Clinical Sciences and Translational Medicine, University of Rome “Tor Vergata”, Via Montpellier 1, 00133 Rome, Italy; (A.C.); (M.E.C.); (A.C.); (A.G.); (P.P.); (G.M.)
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