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https://www.readbyqxmd.com/read/28429284/foxo1-attenuates-naf-induced-apoptosis-of-ls8-cells-through-the-jnk-and-mitochondrial-pathways
#1
Juedan Li, Lin Zhao, Xiaomeng Zhao, Peng Wang, Yan Liu, Jianping Ruan
Fluoride-induced ameloblast apoptosis is a key event in dental fluorosis development. Forkhead box o1 (Foxo1) is a transcription factor involved in cell apoptosis. The present study aims to investigate the effect of Foxo1 on ameloblast apoptosis induced by fluoride in vitro and to explore its possible mechanism. Ameloblast-like cells (LS8 cells) were exposed to various concentrations of NaF for up to 48 h. Foxo1 activation was modulated using lentiviral vectors, and cell apoptosis was measured by flow cytometry...
April 20, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28411405/biomarkers-of-chronic-fluoride-exposure-in-groundwater-in-a-highly-exposed-population
#2
Tewodros Rango, Avner Vengosh, Marc Jeuland, Gary M Whitford, Redda Tekle-Haimanot
This study examined the relation between fluoride (F(-)) concentrations in fingernail clippings and urine and the prevalence and severity of enamel fluorosis (EF) among Ethiopian Rift Valley populations exposed to high levels of F(-) in drinking water. The utility of fingernail clippings as a biomarker for F(-) exposure and EF was also assessed for the first time in a high-F(-) region. The study recorded the EF status of 386 individuals (10 to 50years old), who consume naturally contaminated groundwater with widely varying F(-) concentration (0...
April 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28405851/fluoride-induces-neuroinflammation-and-alters-wnt-signaling-pathway-in-bv2-microglial-cells
#3
Rui Chen, Lian-Dong Zhao, Hong Liu, Hui-Hua Li, Chao Ren, Peng Zhang, Ke-Tai Guo, Hong-Xi Zhang, De-Qin Geng, Cai-Yi Zhang
Fluoride is a common element in nature and our daily life, and excessive intake of this element can cause fluorosis and irreversible brain damage. The toxic effects of fluoride on the central nervous system may be attributed to the release of inflammatory cytokines and ROS. GSK3β is a key protein that modulates NF-κB activity and inflammatory cytokine levels and plays an important role in the Wnt signaling pathway. In this study, we found that fluoride altered the inflammatory status and oxidative stress by inhibiting Wnt signaling pathway activity...
April 12, 2017: Inflammation
https://www.readbyqxmd.com/read/28386112/sodium-fluoride-induces-nephrotoxicity-via-oxidative-stress-regulated-mitochondrial-sirt3-signaling-pathway
#4
Chao Song, Beibei Fu, Jingcheng Zhang, Jiamin Zhao, Mengke Yuan, Wei Peng, Yong Zhang, Haibo Wu
Accumulation of mitochondrial reactive oxygen species (mROS) has been implicated in the pathogenesis of fluorosis. As the main mitochondrial deacetylase, SIRT3 is closely associated with oxidative stress. To investigate the role of SIRT3 in response to sodium fluoride (NaF)-induced nephrotoxicity. Our results showed that NaF treatment impaired mitochondrial ultrastructure, decreased cell viability and increased apoptosis in TCMK-1 cells. Oxidative stress, detected by mROS and 8-Hydroxy-2'-deoxyguanosine (8-OHdG) were higher in NaF-treated cells, accompanied by decreased level of reduced glutathione (GSH)...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28378104/the-role-of-parental-rearing-practices-and-family-demographics-on-oral-health-related-quality-of-life-in-children
#5
S Kumar, M J Zimmer-Gembeck, J Kroon, R Lalloo, N W Johnson
OBJECTIVES: To evaluate the direct and indirect (via oral health-related behaviour) effects of parental rearing practices on children's Oral Health-Related Quality of Life (OHRQoL) within a family-focused, comprehensive predictive model. METHODS: Participants were 11- to 14-year-old children and their parents living in Telangana State, India (N = 1130). Children were clinically assessed for dental caries, gingivitis, oral hygiene status, fluorosis, and malocclusion, and completed a self-administered questionnaire on oral health-related behaviour and OHRQoL...
April 4, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28362308/hydrochemical-characteristics-of-natural-water-and-selenium-rich-water-resources-in-the-northern-daba-mountains-china
#6
Chao Zhao, Kunli Luo, Yajun Du, Yuan Tian, Jie Long, Xiaofeng Zhao, Shixi Zhang
The Northern Daba Mountains (NDM) of Shaanxi Province, China, are a well-known selenium (Se)-rich area, and the area is also known for endemic fluorine (F) and arsenic (As) poisoning. In order to study the hydrochemical characteristics and trace element contents of the natural waters of this region, 62 water samples were collected from Lan'gao area in the NDM. The hydrochemical composition was principally characterized by Ca·Mg-HCO3·SO4. F and As concentrations ranged from 0.01 to 0.67 mg/L and from 0.33 to 6...
April 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/28358035/oral-health-status-in-sichuan-province-findings-from-the-oral-health-survey-of-sichuan-2015-2016
#7
Wei Yin, Ying-Ming Yang, Hong Chen, Xue Li, Zhuo Wang, Li Cheng, Qiu-Dan Yin, Hong-Zhi Fang, Wei Fei, Fang-Lin Mi, Min-Hai Nie, Tao Hu, Xue-Dong Zhou
To investigate oral health status in the residents of Sichuan Province, southwest China, a cross-sectional study was performed using the latest Oral Health Survey Basic Methods recommended by the World Health Organization. A multistage stratified random cluster-sampling method was used to enroll participants from the following three groups: children aged 3-5 years, adolescents aged 12 years, and people aged 65-74 years. In these three groups, the mean numbers of teeth that were affected by caries were 3.28, 0...
March 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28340098/effect-of-fluoride-releasing-resin-composite-in-white-spot-lesions-prevention-a-single-centre-split-mouth-randomized-controlled-trial
#8
Mohannad M Alabdullah, Alaa Nabawia, Mowaffak A Ajaj, Humam Saltaji
Introduction: The objective of this two-arm split-mouth randomized trial, was to evaluate the ability of fluoride-releasing resin composite to prevent demineralization and white spot lesion (WSL) formation, during orthodontic treatment with fixed appliances. Methods: Patients needing comprehensive orthodontic treatment were randomly allocated into two groups, according to the half split-mouth technique. This trial examined a total of 300 teeth in each group: the control group, in which brackets were fixed with a non-fluoride-containing adhesive resin; and the intervention group, in which brackets were fixed with a fluoride-containing adhesive resin...
March 2, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28339032/clc-7-ostm1-contribute-to-the-ability-of-tea-polyphenols-to-maintain-bone-homeostasis-in-c57bl-6-mice-protecting-against-fluorosis
#9
Bing-Yun Li, Yan-Hui Gao, Jun-Rui Pei, Yan-Mei Yang, Wei Zhang, Dian-Jun Sun
Epidemiological investigations indicate that certain ingredients in tea bricks can antagonize the adverse effects of fluoride. Tea polyphenols (TPs), the most bioactive ingredient in tea bricks, have been demonstrated to be potent bone-supporting agents. ClC‑7 is known to be crucial for osteoclast (OC) bone resorption. Thus, in this study, we investigated the potential protective effects of TPs against fluorosis using a mouse model and explored the underlying mechanisms with particular focus on ClC‑7...
March 22, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28292354/treatment-and-prevention-of-skeletal-fluorosis
#10
Chen Yang, Yan Wang, Hui Xu
No abstract text is available yet for this article.
February 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28284958/risk-assessment-of-fluoride-exposure-in-drinking-water-of-tunisia
#11
Wiem Guissouma, Othman Hakami, Abdul Jabbar Al-Rajab, Jamila Tarhouni
The presence of fluoride in drinking water is known to reduce dental cavities among consumers, but an excessive intake of this anion might leads to dental and skeletal fluorosis. This study reports a complete survey of the fluoridated tap water taken from 100 water consumption points in Tunisia. The fluoride concentrations in tap water were between 0 and 2.4 mg L(-1). Risk assessment of Fluoride exposure was assessed depending on the age of consumers using a four-step method: hazard identification, toxicity reference values selection (TRVs), daily exposure assessment, and risk characterization...
March 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28251432/impact-of-caries-and-dental-fluorosis-on-oral-health-related-quality-of-life-a-cross-sectional-study-in-schoolchildren-receiving-water-naturally-fluoridated-at-above-optimal-levels
#12
Álvaro García-Pérez, María Esther Irigoyen-Camacho, S Aída Borges-Yáñez, Marco Antonio Zepeda-Zepeda, Irvin Bolona-Gallardo, Gerardo Maupomé
PURPOSE: The purpose of this study was to evaluate the impact of caries and fluorosis on oral health-related quality of life (OHRQoL) among schoolchildren living in areas with high concentrations of fluoride in water. METHODS: Five hundred and twenty-four schoolchildren (8-12 year olds) residing in rural communities in central Mexico were examined for oral hygiene, caries (International Caries Detection and Assessment System, ICDAS II), and fluorosis (Thylstrup and Fejerskov Index, TFI)...
March 1, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28243305/effect-of-different-surface-treatments-on-microtensile-bond-strength-of-composite-resin-to-normal-and-fluorotic-enamel-after-microabrasion
#13
Mahshid Mohammadi Bassir, Mohammad Bagher Rezvani, Elham Tabatabai Ghomsheh, Zahra Malek Hosseini
OBJECTIVES: This study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (μTBS) of composite resin to normal and fluorotic enamel after microabrasion. MATERIALS AND METHODS: Fifty non-carious anterior teeth were classified into two groups of normal and fluorotic (n=25) using Thylstrup and Fejerskov index (TFI=4-6). Teeth in each group were treated with five modalities as follows and restored with OptiBond FL and Z350 composite resin: 1-Etching (30 seconds), bonding, filling (B); 2-Tooth reduction (0...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28217521/association-of-dental-and-skeletal-fluorosis-with-calcium-intake-and-serum-vitamin-d-concentration-in-adolescents-from-a-region-endemic-for-fluorosis
#14
Prerna P Patel, Pinal A Patel, M Mughal Zulf, Bhrugu Yagnik, Neha Kajale, Rubina Mandlik, Vaman Khadilkar, Shashi A Chiplonkar, Supriya Phanse, Vivek Patwardhan, Priscilla Joshi, Ashish Patel, Anuradha V Khadilkar
CONTEXT: Fluorosis is controlled by the duration of fluoride exposure and calcium and Vitamin D nutrition status. AIM: To examine (a) prevalence of dental and skeletal fluorosis in adolescents from upper, middle, and lower socioeconomic strata (SES) and (b) association of fluorosis with calcium intake and Vitamin D status. SETTINGS AND DESIGN: A cross-sectional study conducted in 10-13.9 years apparently healthy adolescents (n = 90), from different SES of Patan (Gujarat, India)...
January 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28206898/fluoride-varnish-applications-in-preschoolers-and-dental-fluorosis-in-permanent-incisors-results-of-a-nested-cohort-study-within-a-clinical-trial
#15
Ana Paula Pires Dos Santos, Marcella Cristina Bordallo Malta, Mirian de Waele Souchois de Marsillac, Branca Heloisa de Oliveira
PURPOSE: To compare the prevalence and severity of fluorosis in the permanent maxillary incisors of children who had participated in a two-year randomized placebo-controlled clinical trial on fluoride varnish application in the primary dentition and to assess children's esthetic perception of their teeth. METHODS: Parents of 200 one- to four-year-old children who had received biannual applications of fluoride or placebo varnish were contacted four years after the end of the trial...
October 15, 2016: Pediatric Dentistry
https://www.readbyqxmd.com/read/28185728/skeletal-fluorosis-in-marsupials-a-comparison-of-bone-lesions-in-six-species-from-an-australian-industrial-site
#16
Clare Death, Graeme Coulson, Uwe Kierdorf, Horst Kierdorf, Richard Ploeg, Simon M Firestone, Ian Dohoo, Jasmin Hufschmid
In this study we explored the prevalence, type, location and severity of skeletal lesions in six species of Australian marsupial (Macropus giganteus, Notamacropus rufogriseus, Wallabia bicolor, Phascolarctos cinereus, Trichosurus vulpecula and Pseudocheirus peregrinus) from high and low-fluoride environments. Lesions occurred to varying extents in all species, and lesion distribution varied with biomechanical differences in gait and mastication. Bone fluoride levels increased with severity of periosteal hyperostosis...
April 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28170338/association-between-vitamin-d-receptor-gene-foki-polymorphism-and-skeletal-fluorosis-of-the-brick-tea-type-fluorosis-a-cross-sectional-case-control-study
#17
Dan Yang, Yang Liu, Yanru Chu, Qing Yang, Wei Jiang, Fuxun Chen, Dandan Li, Ming Qin, Dianjun Sun, Yanmei Yang, Yanhui Gao
BACKGROUND: Brick-tea type fluorosis is a public health concern in the north west area of China. The vitamin D receptor (VDR)-FokI polymorphism is considered to be a regulator of bone metabolism and calcium resorption. However, the association of VDR-FokI polymorphism with the risk of brick-tea type fluorosis has not been reported. MATERIALS AND METHODS: A cross sectional, case control study was conducted in three provinces (Inner Mongolia, Qinghai and Sinkiang) in China...
November 10, 2016: BMJ Open
https://www.readbyqxmd.com/read/28152004/prolactin-rs1341239-t-allele-may-have-protective-role-against-the-brick-tea-type-skeletal-fluorosis
#18
Bing-Yun Li, Yan-Mei Yang, Yang Liu, Jing Sun, Yan Ye, Xiao-Na Liu, Hong-Xu Liu, Zhen-Qi Sun, Mang Li, Jing Cui, Dian-Jun Sun, Yan-Hui Gao
OBJECTIVE: Prolactin (PRL) has been reported to be associated with increased bone turnover, and increased bone turnover is also a feature of skeletal fluorosis (SF). Autocrine/paracrine production of PRL is regulated by the extrapituitary promoter and a polymorphism in the extrapituitary PRL promoter at -1149 (rs1341239) is associated with disturbances of bone metabolism in other diseases. Here, we have investigated the possibility that the rs1341239 polymorphism is associated with SF, which results from the consumption of brick tea...
2017: PloS One
https://www.readbyqxmd.com/read/28131910/polymorphisms-in-genes-involved-in-enamel-development-are-associated-with-dental-fluorosis
#19
Erika Calvano Küchler, Patricia Nivoloni Tannure, Daniela Silva Barroso de Oliveira, Senda Charone, Paulo Nelson-Filho, Raquel Assed Bezerra da Silva, Marcelo de Castro Costa, Leonardo Santos Antunes, Mônica Diuana Calasans Maia, Lívia Azeredo Alves Antunes
OBJECTIVE: To evaluate the association between polymorphisms in DLX1, DLX2, MMP13, TIMP1 and TIMP2 genes with dental fluorosis (DF) phenotype. DESIGN: Four hundred and eighty one subjects (108 with DF and 373 DF free) from 6 to 18 years of age were recruited. This population lived in Rio de Janeiro, a city with fluoridation of public water supplies. DF was assessed using the Deańs index modified. Only erupted permanent teeth were assessed. Genetic polymorphisms in DLX1, DLX2, MMP13, TIMP1 and TIMP2 were analyzed by real-time PCR from genomic DNA...
January 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28120305/safety-evaluation-of-fluoride-content-in-tea-infusions-consumed-in-the-azores-a-volcanic-region-with-water-springs-naturally-enriched-in-fluoride
#20
Diana Paula Silva Linhares, Patrícia Ventura Garcia, Leslie Amaral, Teresa Ferreira, Armindo Dos Santos Rodrigues
Tea is the second most commonly consumed beverage in the world. It is well recognized that the consumption of tea in high quantities can promote the development of fluorosis. The main objective of this study is to estimate the exposure to fluoride in the Azores through drinking tea prepared with water from different volcanic locations, by i) investigating the fluoride (F) content of various commercial brands of tea (Camellia sinensis) marketed in Azores and ii) comparing tea releasing rates of F according to brewing time, considering the fluoride concentration in the different types of water used for the infusion...
January 24, 2017: Biological Trace Element Research
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