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Bi R, Sun Y, Xiang L, Xu Z, Ye X, Tian Y, Lin Y, Yang C, Gao Y. TGF-β1/Smad3 Signaling Is Required to Alleviate Fluoride-Induced Enamel Hypomineralization. Biol Trace Elem Res 2024; 202:569-579. [PMID: 37140770 DOI: 10.1007/s12011-023-03688-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/28/2023] [Indexed: 05/05/2023]
Abstract
Excessive fluoride intake during enamel development can affect enamel mineralization, leading to dental fluorosis. However, its potential mechanisms remain largely unexplored. In the present study, we aimed to investigate the impact of fluoride on the expressions of RUNX2 and ALPL during mineralization and the effect of TGF-β1 administration on fluoride treatment. A dental fluorosis model of newborn mice and an ameloblast cell line ALC were both used in the present study. The mice of the NaF group, including the mothers and newborns, were fed with water containing 150 ppm NaF after delivery to induce dental fluorosis. The mandibular incisors and molars showed significant abrasion in the NaF group. Immunostaining, qRT-PCR, and Western blotting analysis indicated that exposure to fluoride markedly down-regulated RUNX2 and ALPL in mouse ameloblasts and ALCs. Besides, fluoride treatment significantly decreased the mineralization level detected by ALP staining. Furthermore, exogenous TGF-β1 up-regulated RUNX2 and ALPL and promoted mineralization, while the addition of SIS3 could block such TGF-β1-induced up-regulation. In TGF-β1 conditional knockout mice, the immunostaining of RUNX2 and ALPL was weaker compared with wild-type mice. Exposure to fluoride inhibited the expressions of TGF-β1 and Smad3. Co-treatment of TGF-β1 and fluoride up-regulated RUNX2 and ALPL compared with the fluoride alone treatment, promoting mineralization. Collectively, our data indicated that TGF-β1/Smad3 signaling pathway was necessary for the regulatory effects of fluoride on RUNX2 and ALPL, and the fluoride-induced suppression of ameloblast mineralization was mitigated by activating TGF-β1/Smad3 signaling pathway.
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Affiliation(s)
- Ruonan Bi
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Yiqun Sun
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Lili Xiang
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Zhenzhen Xu
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Xiaoyuan Ye
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Yanying Tian
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Yao Lin
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China
| | - Chunyan Yang
- Institute of Stomatology, Binzhou Medical University, Shandong, 264003, Yantai, China.
| | - Yuguang Gao
- Department of Pediatrics and Preventive Dentistry, Binzhou Medical University Hospital, Shandong, 256600, Binzhou, China.
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2
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Orta Yilmaz B, Aydin Y. Disruption of Leydig cell steroidogenic function by sodium arsenite and/or sodium fluoride. Theriogenology 2022; 193:146-156. [PMID: 36182826 DOI: 10.1016/j.theriogenology.2022.09.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 09/08/2022] [Accepted: 09/19/2022] [Indexed: 11/18/2022]
Abstract
Arsenite (As) and fluoride (F), both of which are linked to a variety of human ailments, are regularly found in underground drinking water. Numerous studies have shown that As and/or F have negative impacts on testicular function and fertility. For this purpose, mouse Leydig cells, the main cells responsible for the generation and regulation of steroid hormones such as testosterone, were used to reveal the effects of individual and combined exposure of As and F on the steroidogenic pathway in the male reproductive system. Leydig cells were treated with 0.39 μM (50 ppb) As and 0.0476 mM (2 ppm) F alone and in combination for 24 h. The findings revealed that As and/or F exposure induced oxidative stress and apoptosis in Leydig cells and altered antioxidant equilibrium of the cells by reducing superoxide dismutase, catalase, glutathione peroxidase. Additionally, individual and combined administration of As and/or F significantly supressed the expression of both steroidogenic enzymes and the genes encoding these enzymes. In conclusion, this study showed that exposure to As and F at environmentally relevant concentrations dispersed by water decreased testosterone production in Leydig cells, an important cell of the male reproductive system. The deleterious effects of even the lowest concentrations of As and F elements that can reach humans from the environment on the Leydig cell, and therefore on male infertility, emphasize necessity new safe limits for these elements.
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Affiliation(s)
- Banu Orta Yilmaz
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey.
| | - Yasemin Aydin
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
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3
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Aydin Y, Orta-Yilmaz B. Synergistic effects of arsenic and fluoride on oxidative stress and apoptotic pathway in Leydig and Sertoli cells. Toxicology 2022; 475:153241. [PMID: 35714946 DOI: 10.1016/j.tox.2022.153241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/08/2022] [Accepted: 06/11/2022] [Indexed: 11/15/2022]
Abstract
Excessive intake of arsenic (As) and fluoride (F), which are present in underground drinking water, have adverse effects on human health, and especially on the male reproductive system. In this regard, it's critical to figure out how As and F affect Leydig and Sertoli cells, which are key cells in the male reproductive system. The goal of this study was to determine the synergistic effects of co-exposure of As and F, via drinking water, on Leydig and Sertoli cells, which are models for the male reproductive system, as well as the mechanisms underlying these effects in terms of oxidative damage and apoptosis. Leydig and Sertoli cells were exposed to concentrations of 7.7 µM (0.57 ppm) As and 0.4 mM (7.24 ppm) F based on the highest daily intake of drinking water for 24 h. The present results revealed that As and/or F treatment reduced cell viability and proliferation in Leydig and Sertoli cells, elevated lactate dehydrogenase, a cytotoxicity marker, and triggered oxidative stress and apoptosis. Furthermore, it has been proven that when As and F are exposed in combination, they have a synergistic effect. In conclusion, by revealing the harmful effects of As and F on Leydig and Sertoli cells, and thus on male infertility, it is possible to reduce As and F exposure to prevent infertility after exposure to these molecules not only separately but also together. It will be considered to determine new action and action plans to reduce As and F exposure.
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Affiliation(s)
- Yasemin Aydin
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey.
| | - Banu Orta-Yilmaz
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
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4
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Kanjevac T, Taso E, Stefanovic V, Petkovic-Curcin A, Supic G, Markovic D, Djukic M, Djuran B, Vojvodic D, Sculean A, Rakic M. Estimating the Effects of Dental Caries and Its Restorative Treatment on Periodontal Inflammatory and Oxidative Status: A Short Controlled Longitudinal Study. Front Immunol 2021; 12:716359. [PMID: 34603290 PMCID: PMC8479168 DOI: 10.3389/fimmu.2021.716359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/17/2021] [Indexed: 02/05/2023] Open
Abstract
Dental caries and periodontitis are among the most common health conditions that are currently recognized as growing socio-economic problems relating to their increasing prevalence, negative socio-economic impact, and harmful effects on systemic health. So far, the exact effects of caries and standard restorative materials on periodontal inflammatory and oxidative status are not established. The present study aimed to investigate the effect of caries and its restoration using standard temporary and permanent filling materials on a panel of 16 inflammatory and oxidative markers in gingival crevicular fluid (GCF) of periodontally healthy individuals, 7 (D7) and 30 (D30) days post-restoration, while the intact teeth represented the control. One hundred ninety systemically and periodontally healthy patients with occlusal caries underwent standard cavity preparation and restorations with one of six standard temporary or permanent restorative material according to indication and randomization scheme. Interleukin (IL)-2, IFN- γ, IL-12, IL-17A, IL-13, IL-9, IL-10, IL-6, IL-5, IL-4, IL-22, TNF-α, IL1- β, thiobarbituric acid reactive substances, superoxide dismutase, and reduced form of glutathione were measured in GCF samples by flowcytometry and spectrophotometry in aid of commercial diagnostic assays. Caries affected teeth exhibited significantly increased IL-1 β, IL-17, IL-22, and TBARS and decreased IL-9 concentrations compared to healthy controls. Treatment generally resulted in an increased antioxidant capacity with exception of zinc-polycarboxylate cement showing distinctive inflammatory pattern. Comparison of inflammatory and oxidative profiles in temporary and permanent restorations showed material-specific patterning which was particularly expressed in temporary materials plausibly related to greater caries extension. Caries affected teeth exhibited a balanced inflammatory pattern in GCF, with a general tendency of homeostatic re-establishment following treatment. Restorative materials did not provide specific pathological effects, although some material groups did exhibit significantly elevated levels of inflammatory and oxidative markers compared to healthy controls, while the material-specific patterning was observed as well.
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Affiliation(s)
- Tatjana Kanjevac
- Department of Dentistry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Ervin Taso
- Clinic for Stomatology, Military Medical Academy, Belgrade, Serbia
| | | | | | - Gordana Supic
- Institute for Medical Research, Military Medical Academy, Belgrade, Serbia
| | - Dejan Markovic
- Department of Paediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Mirjana Djukic
- Department for Toxicology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Boris Djuran
- Clinic for Stomatology, Military Medical Academy, Belgrade, Serbia
| | - Danilo Vojvodic
- Institute for Medical Research, Military Medical Academy, Belgrade, Serbia
| | - Anton Sculean
- Faculty of Dental Medicine, University of Bern, Bern, Switzerland
| | - Mia Rakic
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, Faculty of Dentistry, University Complutense of Madrid, Madrid, Spain
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Aulestia FJ, Groeling J, Bomfim GHS, Costiniti V, Manikandan V, Chaloemtoem A, Concepcion AR, Li Y, Wagner LE, Idaghdour Y, Yule DI, Lacruz RS. Fluoride exposure alters Ca 2+ signaling and mitochondrial function in enamel cells. Sci Signal 2020; 13:eaay0086. [PMID: 32071168 PMCID: PMC7173621 DOI: 10.1126/scisignal.aay0086] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Fluoride ions are highly reactive, and their incorporation in forming dental enamel at low concentrations promotes mineralization. In contrast, excessive fluoride intake causes dental fluorosis, visually recognizable enamel defects that can increase the risk of caries. To investigate the molecular bases of dental fluorosis, we analyzed the effects of fluoride exposure in enamel cells to assess its impact on Ca2+ signaling. Primary enamel cells and an enamel cell line (LS8) exposed to fluoride showed decreased internal Ca2+ stores and store-operated Ca2+ entry (SOCE). RNA-sequencing analysis revealed changes in gene expression suggestive of endoplasmic reticulum (ER) stress in fluoride-treated LS8 cells. Fluoride exposure did not alter Ca2+ homeostasis or increase the expression of ER stress-associated genes in HEK-293 cells. In enamel cells, fluoride exposure affected the functioning of the ER-localized Ca2+ channel IP3R and the activity of the sarco-endoplasmic reticulum Ca2+-ATPase (SERCA) pump during Ca2+ refilling of the ER. Fluoride negatively affected mitochondrial respiration, elicited mitochondrial membrane depolarization, and disrupted mitochondrial morphology. Together, these data provide a potential mechanism underlying dental fluorosis.
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Affiliation(s)
- Francisco J Aulestia
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY 10010, USA
| | - Johnny Groeling
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY 10010, USA
| | - Guilherme H S Bomfim
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY 10010, USA
| | - Veronica Costiniti
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY 10010, USA
| | - Vinu Manikandan
- Biology Program, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Ariya Chaloemtoem
- Biology Program, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Axel R Concepcion
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA
| | - Yi Li
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY 10010, USA
| | - Larry E Wagner
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY 14526, USA
| | - Youssef Idaghdour
- Biology Program, Division of Science and Mathematics, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - David I Yule
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY 14526, USA
| | - Rodrigo S Lacruz
- Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, NY 10010, USA.
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6
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Orta Yilmaz B, Korkut A, Erkan M. Sodium fluoride disrupts testosterone biosynthesis by affecting the steroidogenic pathway in TM3 Leydig cells. CHEMOSPHERE 2018; 212:447-455. [PMID: 30165274 DOI: 10.1016/j.chemosphere.2018.08.112] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/26/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
Fluorine is an essential trace element to which humans and animals are exposed through water, food, air and products used for dental health. Numerous studies have reported the detrimental effects of fluoride on testicular function and fertility; however, the underlying mechanisms of testosterone biosynthesis remain unclear. In this study, Leydig cells, the primary cells responsible for the production and regulation of steroid hormones in the testis, were used to elicit effects of sodium fluoride on the steroidogenic pathway. Leydig cells were treated with 0, 0.1, 1, 10 and 100 mg/L sodium fluoride for 24 h, respectively. The result of the study showed that sodium fluoride significantly decreased cell viability and cell proliferation, increased cell cytotoxicity and decreased the amounts of testosterone and 3',5'-cyclic adenosine monophosphate levels in a concentration-dependent manner. Also, these results indicated that NaF suppressed the expression of steroidogenic genes (steroidogenic acute regulatory protein, cholesterol side-chain cleavage enzyme, 3β-hydroxy dehydrogenase type I and 17β-hydroxy dehydrogenase type III) and proteins (luteinizing hormone receptor, cholesterol side-chain cleavage enzyme, 3β-hydroxy dehydrogenase), by changing the mRNA expression levels of the transcription factors (steroidogenic factor-1, GATA binding protein-4, nerve growth factor IB and nuclear receptor subfamily 0 group B member 1).
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Affiliation(s)
- Banu Orta Yilmaz
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey.
| | - Ahu Korkut
- Department of Obstetrics and Gynaecology, Isparta City Hospital, Isparta, Turkey
| | - Melike Erkan
- Department of Biology, Faculty of Science, Istanbul University, Istanbul, Turkey
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7
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Qi S, Zhu X, Wang X, Chen F, Yan Y, Shang G, Chen W. Role of protein delta homolog 1 in the proliferation and differentiation of ameloblasts. Mol Med Rep 2017; 17:3537-3544. [PMID: 29257328 PMCID: PMC5802151 DOI: 10.3892/mmr.2017.8290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 10/12/2017] [Indexed: 12/25/2022] Open
Abstract
Protein delta homolog 1 (DLK1) regulates the odontoblastic differentiation of human dental pulp stem cells. It was hypothesized that DLK1 may exert regulatory effects on epithelial‑mesenchymal interactions in tooth development. The present study investigated the expression of DLK1 during the development of mouse enamel and its role in the proliferation and differentiation of ameloblast‑lineage cells (ALCs). DLK1 expression was upregulated in ameloblasts in the first mandibular molar during the entire process of enamel development. The mRNA and protein levels of DLK1 were significantly upregulated following ameloblastic induction in ALCs. In addition, overexpression of DLK1 promoted the proliferation of ALCs, inhibited ameloblastic differentiation, upregulated the expression of amelogenin and enamelin, and downregulated the expression of odontogenic ameloblast‑associated protein and kallikrein 4. The results of the present study suggested that DLK1 may be a potent regulator of ameloblast proliferation and differentiation, and may regulate enamel formation during tooth development.
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Affiliation(s)
- Shengcai Qi
- Department of Oral and Maxillofacial‑Head and Neck Oncology, and Faculty of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
| | - Xueqin Zhu
- Department of Oral and Maxillofacial‑Head and Neck Oncology, and Faculty of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
| | - Xiaoning Wang
- Department of Oral and Maxillofacial‑Head and Neck Oncology, and Faculty of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
| | - Fubo Chen
- Department of Stomatology, Shanghai Tenth People's Hospital, Tongji University, Shanghai 200072, P.R. China
| | - Yanhong Yan
- Department of Pediatric Dentistry, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai 200072, P.R. China
| | - Guangwei Shang
- Department of Stomatology, Shanghai Tenth People's Hospital, Tongji University, Shanghai 200072, P.R. China
| | - Wantao Chen
- Department of Oral and Maxillofacial‑Head and Neck Oncology, and Faculty of Oral and Maxillofacial Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
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Pramanik S, Saha D. The genetic influence in fluorosis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 56:157-162. [PMID: 28938149 DOI: 10.1016/j.etap.2017.09.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 09/07/2017] [Accepted: 09/14/2017] [Indexed: 06/07/2023]
Abstract
Fluorosis, caused by ingestion of excess fluoride, is endemic in at least 25 countries across the globe, China and India being the worst affected among them. Dental, skeletal and non-skeletal are the major types of fluorosis affecting millions of people in these countries. A number of genetic epidemiological studies carried out by investigators have shown the evidence for association between genetic polymorphisms in candidate genes and differences in the susceptibility pattern of different types of fluorosis among individuals living in the same community and having the same environmental exposure. These studies have pointed out that genetic variants in some candidate genes like COL1A2 (Collagen type 1 alpha 2), CTR (Calcitonin receptor gene), ESR (Estrogen receptor), COMT (Catechol-o-methyltransferase), GSTP1 (Glutathione S-transferase pi 1), MMP-2 (Matrix metallopeptidase 2), PRL (Prolactin), VDR (Vitamin D receptor) and MPO (Myeloperoxidase) could increase or decrease the risk of fluorosis among the exposed individuals in endemic areas. So, it is increasingly becoming evident that an individual's genetic background could play a major role in influencing the risk to fluorosis when other factors like specific environmental exposures including dietary patterns of fluoride intake and other nutrients remain the same. The current manuscript presents an up-to-date critical review on fluorosis, focusing mainly on the genetic association studies that have looked at the possible involvement of genetic factors in fluorosis.
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Affiliation(s)
- Sreemanta Pramanik
- Kolkata Zonal Centre, CSIR-National Environmental Engineering Research Institute, i-8 Sector-C, East Kolkata Area Development Project, Kolkata 700107, India.
| | - Depanwita Saha
- Kolkata Zonal Centre, CSIR-National Environmental Engineering Research Institute, i-8 Sector-C, East Kolkata Area Development Project, Kolkata 700107, India
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Wang L, Zhu Y, Wang D. High-Dose Fluoride Induces Apoptosis and Inhibits Ameloblastin Secretion in Primary Rat Ameloblast. Biol Trace Elem Res 2016; 174:402-409. [PMID: 27193486 DOI: 10.1007/s12011-016-0738-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 05/09/2016] [Indexed: 12/13/2022]
Abstract
The objectives of this study are to establish the in vitro culture system for rat primary ameloblast and to investigate the effects of fluoride on cell viability, apoptosis, and ameloblastin (AMBN) secretion of primary rat ameloblast in vitro. Ameloblast was isolated from the tooth germ of the maxillomandibular molar and cultured in vitro. Cells were treated with NaF at 0.4, 0.8, 1.6, 3.2, and 6.4 mM for 24, 48, and 72 h, respectively. Cell viability was measured by MTT assay and apoptosis was tested by flow cytometry. The activation of Fas ligand (FasL)/Fas pathway was detected using immunoblotting for FasL, Fas, cleaved caspase-8, cleaved caspase-3, and cleaved PARP. Secretion of AMBN in culture medium was measured using ELISA. Primary rat ameloblast was successfully isolated and cultured. The effects of low-dose fluoride on cell viability were bi-phasic, while high-dose fluoride resulted in decreased cell viability uniformly. Fluoride induced ameloblast apoptosis via activation of FasL/Fas signaling pathway and diminished secretion of AMBN by ameloblast. Fluoride could decrease ameloblast viability, induce ameloblast apoptosis via activating FasL/Fas signaling pathway, and reduce AMBN secretion.
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Affiliation(s)
- Lin Wang
- Department of Stomatology, Xi'an Medical University, No. 1, XinWang Road, WeiYang District, Xi'an, 710021, China.
| | - Yong Zhu
- Department of Stomatology, Xi'an Medical University, No. 1, XinWang Road, WeiYang District, Xi'an, 710021, China
| | - Danyang Wang
- Department of Stomatology, Xi'an Medical University, No. 1, XinWang Road, WeiYang District, Xi'an, 710021, China
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10
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Effects of sodium fluoride on immune response in murine macrophages. Toxicol In Vitro 2016; 34:81-87. [DOI: 10.1016/j.tiv.2016.03.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 02/29/2016] [Accepted: 03/04/2016] [Indexed: 11/17/2022]
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Jia J, Yang F, Yang M, Wang C, Song Y. P38/JNK signaling pathway mediates the fluoride-induced down-regulation of Fam83h. Biochem Biophys Res Commun 2016; 471:386-90. [PMID: 26876574 DOI: 10.1016/j.bbrc.2016.02.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 02/08/2016] [Indexed: 01/08/2023]
Abstract
BACKGROUND/AIM The similar clinical and pathological feature in fluorosis and amelogenesis imperfect with FAM83H mutations imply that excess fluoride could have effects on the expression of FAM83H and could elaborate this process by some signal pathways regulation. The present study aims to investigate the effects of fluoride on Fam83h expression and try to explore the molecular signaling regulation between them as well as the association of high concentration fluoride with mineralization in ameloblast lineage cells. METHODS Protein expression and signaling pathways of mouse ameloblast-like LS8 cells, exposed to fluoride or MAPK inhibitors, were compared to control cells without exposure. Fam83h, proteins of MAPK signal pathways (ERK, P38 and JNK) were examined by Quantitative real-time PCR and/or Western-blot. ALP activity and ALP staining were used to detect the mineralization in the cells with exposure during 7-day mineralization inducing differentiation. RESULTS The results showed that Fam83h protein level in LS8 cells decreased in the presence of fluoride and MAPK inhibitors. Down-regulation of Fam83h by fluoride was related to suppression of JNK and P38 phosphorylation, and the descending degree of P38 was more obvious. Fluoride and MAPK inhibitors treatment significantly decreased the mineralization level in LS8 cells. CONCLUSION The findings suggest that JNK and P38 could be key regulatory element for Fam83h expression, and that LS8 cells can respond to fluoride by down-regulating Fam83h expression through the regulation of JNK and p38 signaling pathways.
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Affiliation(s)
- Jie Jia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China; The First Affiliated Hospital of Henan University, 357 Ximen Road, Kaifeng 471000, China
| | - Fang Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China
| | - Mei Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China
| | - Changning Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China
| | - Yaling Song
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China.
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Abstract
Human enamel development of the permanent teeth takes place during childhood and stresses encountered during this period can have lasting effects on the appearance and structural integrity of the enamel. One of the most common examples of this is the development of dental fluorosis after childhood exposure to excess fluoride, an elemental agent used to increase enamel hardness and prevent dental caries. Currently the molecular mechanism responsible for dental fluorosis remains unknown; however, recent work suggests dental fluorosis may be the result of activated stress response pathways in ameloblasts during the development of permanent teeth. Using fluorosis as an example, the role of stress response pathways during enamel maturation is discussed.
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13
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The inhibitory effects of silver diamine fluoride at different concentrations on matrix metalloproteinases. Dent Mater 2012; 28:903-8. [PMID: 22578660 DOI: 10.1016/j.dental.2012.04.011] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 01/04/2012] [Accepted: 04/16/2012] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To study the inhibitory effect of various commercially available concentrations of silver diamine fluoride (SDF) solutions on matrix metalloproteinases (MMPs). METHODS Three SDF solutions with concentrations at 38%, 30% and 12% were studied. Two sodium fluoride (NaF) solutions at 10% and 3% were prepared, and they had the same fluoride ion concentrations as 38% and 12% SDF, respectively. Two silver nitrate (AgNO(3)) solutions at 42% and 13% were also prepared, and they had the same silver ion concentrations as 38% and 12% SDF, respectively. Ten samples of each experimental solution were used to study their inhibitory effect on three MMPs, which were MMP-2 (gelatinase A), MMP-8 (neutrophil collagenase) and MMP-9 (gelatinase B) using MMP assay kits. Positive control containing assay buffer at pH 9 and MMPs dilution was used to calculate the percentage inhibition. RESULTS The percentage inhibition of 38%, 30% and 12% SDF on MMP-2 were 79%, 60% and 17%, respectively (p<0.001); on MMP-8 were 94%, 85% and 77%, respectively (p<0.001); on MMP-9 were 82%, 65% and 60%, respectively (p<0.001). The percentage inhibition on MMP-2, MMP-8 and MMP-9 by 38% SDF was significantly higher than the corresponding percentage inhibition by 10% NaF and 42% AgNO(3). SIGNIFICANCE Greater inhibitory effect on MMPs was found with higher concentration of SDF solution. SDF had more inhibition on MMPs than solutions of NaF and AgNO(3) containing equivalent concentration of fluoride and silver ions, respectively.
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Yamada A, Iwamoto T, Fukumoto E, Arakaki M, Miyamoto R, Sugawara Y, Komatsu H, Nakamura T, Fukumoto S. Epithelial-mesenchymal interaction reduces inhibitory effects of fluoride on proliferation and enamel matrix expression in dental epithelial cells. PEDIATRIC DENTAL JOURNAL 2012. [DOI: 10.1016/s0917-2394(12)70253-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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