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Fluoride toxicity

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https://www.readbyqxmd.com/read/28223109/fluoride-exposure-abates-pro-inflammatory-response-and-induces-in-vivo-apoptosis-rendering-zebrafish-danio-rerio-susceptible-to-bacterial-infections
#1
Rashmi Singh, Preeti Khatri, Nidhi Srivastava, Shruti Jain, Vani Bramchari, Asish Mukhopadhyay, Shibnath Mazumder
The present study describes the immunotoxic effect of chronic fluoride exposure on adult zebrafish (Danio rerio). Zebrafish were exposed to fluoride (71.12 mg/L; 1/10 LC50) for 30 d and the expression of selected genes studied. We observed significant elevation in the detoxification pathway gene cyp1a suggesting chronic exposure to non-lethal concentration of fluoride is indeed toxic to fish. Fluoride mediated pro-oxidative stress is implicated with the downregulation in superoxide dismutase 1 and 2 (sod1/2) genes...
February 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28196604/addition-of-bioactive-glass-to-glass-ionomer-cements-effect-on-the-physico-chemical-properties-and-biocompatibility
#2
T De Caluwé, C W J Vercruysse, I Ladik, R Convents, H Declercq, L C Martens, R M H Verbeeck
OBJECTIVES: Glass ionomer cements (GICs) are a subject of research because of their inferior mechanical properties, despite their advantages such as fluoride release and direct bonding to bone and teeth. Recent research aims to improve the bioactivity of the GICs and thereby improve mechanical properties on the long term. In this study, two types of bioactive glasses (BAG) (45S5F and CF9) are combined with GICs to evaluate the physico-chemical properties and biocompatibility of the BAG-GIC combinations...
February 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28196457/dermal-absorption-of-fumigant-gases-during-hazmat-incident-exposure-scenarios-methyl-bromide-sulfuryl-fluoride-and-chloropicrin
#3
Sharyn Gaskin, Linda Heath, Dino Pisaniello, John W Edwards, Michael Logan, Christina Baxter
Accidental or intentional releases of toxic gases or vapors are the most common occurrence in hazardous material (HAZMAT) incidents that result in human injuries. The most serious hazard from exposure to gases or vapors is via the respiratory system. Dermal uptake, as a secondary route, is still a concern, most acutely for the unprotected public. There is a limited evidence base describing skin absorption of toxic gases and vapors in HAZMAT exposure scenarios, which are relatively brief compared with traditional test periods for skin absorption studies...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28178594/the-effects-of-fluoride-based-fire-fighting-foams-on-soil-microbiota-activity-and-plant-growth-during-natural-attenuation-of-perfluorinated-compounds
#4
Renato Nallin Montagnolli, Paulo Renato Matos Lopes, Jaqueline Matos Cruz, Elis Marina Turini Claro, Gabriela Mercuri Quiterio, Ederio Dino Bidoia
The use of fluoride based foams increases the effectiveness of fire-fighting operations, but they are also accompanied by major drawbacks regarding environmental safety of perfluorinated compounds (PFCs). The main concern with PFCs release is due to their well-known persistence and bioaccumulative potential, as they have been detected in many environmental samples. There is a significant knowledge gap on PFC toxicity to plants, even though such data could be useful towards bioremediation procedures. It is consensus that a realistic assessment of fire-fighting foam toxicity should cover as many test organisms as possible, however, few studies combine the performance of ecotoxicological tests with a detailed study of microbial communities in soil contaminated with firefighting foams...
January 30, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28144801/a-brief-and-critical-review-on-hydrofluorosis-in-diverse-species-of-domestic-animals-in-india
#5
REVIEW
Shanti Lal Choubisa
India is one of the fluoride-endemic countries where the maximum numbers of ground or drinking water sources are naturally fluoridated. In India, a total of 23, out of 36 states and union territories have drinking water contaminated with fluoride in varying concentration. In the present scenario, especially in rural India, besides the surface waters (perennial ponds, dams, rivers, etc.), bore wells and hand pumps are the principal drinking water sources for domestic animals such as cattle (Bos taurus), water buffaloes (Bubalus bubalis), sheep (Ovis aries), goats (Capra hircus), horses (Equus caballus), donkeys (Equus asinus) and dromedary camels (Camelus dromedarius)...
January 31, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28073323/protective-effect-exerted-by-soil-phosphorus-on-soybean-subjected-to-arsenic-and-fluoride
#6
Carolina Bustingorri, Guillermo Noriega, Raúl S Lavado, Karina Balestrasse
: Objetive: Arsenic (As) and fluoride (F) are found in groundwater and soils around the world, causing different problems to crops. Because these elements compete against phosphorus (P) in soils and plants, their relationship is complex. The aim of this work was to study the oxidative stress of soybean plants subjected to different concentrations of As and F, and the effect of P. METHODS: The following 10 treatments were carried out in each of two soils with different P content: three As levels (low 10 mg As kg(-1), medium 50 mg As kg(-1) and high 100 mg As kg(-1)), three F levels (low 160 mg F kg(-1), medium 250 mg F kg(-1) and high 500 mg F kg(-1)) and three As + F levels (same concentrations), and the control treatment (soil with the background As and F concentrations) Lipid peroxidation, chlorophyll, gluthatione contents and antioxidant enzymes activities were determination...
January 10, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28050995/anaemia-in-adolescent-girls-an-intervention-of-diet-editing-and-counselling
#7
Andezhath K Susheela, Rashmi Gupta, Nisith K Mondal
BACKGROUND: Though a major public health problem of nutritional anaemia in schoolchildren is being addressed by iron supplementation and/or fortified food, they continue to be anaemic. We aimed to study the effect of fluoride consumption on haemoglobin levels and whether elimination of fluoride from the diet would correct anaemia in children. METHODS: Two hundred and fifty adolescent girls, 10-17 years of age, from a government senior secondary girls school in East Delhi, participated in the programme...
July 2016: National Medical Journal of India
https://www.readbyqxmd.com/read/28028786/determination-of-fluoride-in-organic-and-non-organic-wines
#8
Soraya Paz, Juan Ramón Jaudenes, Angel José Gutiérrez, Carmen Rubio, Arturo Hardisson, Consuelo Revert
Fluorine is an element of great importance to human health, as it is considered to be an essential element. However, both a deficiency and an excess, it can cause various problems. It is for this reason that values have been established regarding the recommended daily intake (RDI) and acceptable daily intake (ADI). The largest source of incorporation of fluoride is water, but it can be found in other foods and beverages, such as vegetables, tea, and wine. The aim of the study was to establish the fluoride concentration in organic and non-organic wines from different appellations of origin of the Canary Islands and mainland Spain, in order to assess the contribution of fluoride and toxic risk...
December 27, 2016: Biological Trace Element Research
https://www.readbyqxmd.com/read/28012895/protocatechuic-acid-methyl-ester-ameliorates-fluoride-toxicity-in-a549-cells
#9
Jaishabanu Ameeramja, Ekambaram Perumal
The present study is aimed to determine the potential benefits of protocatechuic acid methyl ester (PCAME) against fluoride (F(-)) induced lung toxicity using A549 cells. The cells were treated with sodium fluoride (NaF) alone and in combination with PCAME for different time points (0-24 h) and evaluated for intracellular reactive oxygen species (ROS) production, F(-) content, oxidative stress markers, apoptosis and mRNA expression of redox signaling and inflammatory genes. The results shown that PCAME alleviates the toxic effects of F(-)via modulating its bioavailability, intracellular calcium level, mitochondrial membrane integrity and redox signaling in A549 cells...
December 22, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28009504/multifunctionalization-of-poly-vinylidene-fluoride-reactive-copolymer-blend-membranes-for-broad-spectrum-applications
#10
Dixit V Bhalani, Anupam Bera, Arvind K Singh Chandel, Sweta B Kumar, Suresh K Jewrajka
Simultaneous immobilization and cross-linking of antifouling/low toxic polymers, e.g., poly(ethylenimine) (PEI), dextran (Dex), agarose (Agr), poly(ethylene glycol) (PEG), PEI-Dex, and PEI-PEG conjugates, and stimuli-responsive copolymers on a porous membrane surface in mild reaction conditions is desirable for the enhancement of hydrophilicity, antifouling character, cytocompatibility, and inducing stimuli-responsive behavior. Grafting to technique is required since the precursors of most of these macromolecules are not amenable to surface-initiated polymerization...
January 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28002795/sodium-fluoride-naf-causes-toxic-effects-on-splenic-development-in-mice
#11
Ping Kuang, Huidan Deng, Hengmin Cui, Lian Chen, Jing Fang, Zhicai Zuo, Junliang Deng, Xun Wang, Ling Zhao
At present, very limited studies focus on the toxic effect of sodium fluoride (NaF) on splenic development of human and animals in vivo. This study was firstly designed to evaluate the toxic effects of NaF on the splenic development of mice in vivo by observing histopathological lesions, changes of splenic growth index (GI), T and B cells, immunoglobulin A (IgA), immunoglobulin G (IgG) and immunoglobulin M (IgM) contents, cytokine protein expression levels, and cell cycle and cyclins/cdks protein expression levels using the methods of pathology, flow cytometry (FCM), western blot (WB), and enzyme-linked immunosorbent assay (ELISA)...
December 16, 2016: Oncotarget
https://www.readbyqxmd.com/read/27990564/planarian-cholinesterase-in-vitro-characterization-of-an-evolutionarily-ancient-enzyme-to-study-organophosphorus-pesticide-toxicity-and-reactivation
#12
Danielle Hagstrom, Hideto Hirokawa, Limin Zhang, Zoran Radic, Palmer Taylor, Eva-Maria S Collins
The freshwater planarian Dugesia japonica has recently emerged as an animal model for developmental neurotoxicology and found to be sensitive to organophosphorus (OP) pesticides. While previous activity staining of D. japonica, which possess a discrete cholinergic nervous system, has shown acylthiocholine catalysis, it is unknown whether this is accomplished through an acetylcholinesterase (AChE), butyrylcholinesterase (BChE), or a hybrid esterase and how OP exposure affects esterase activity. Here, we show that the majority of D...
December 18, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27990445/voriconazole-induced-periostitis-enthesopathy-in-solid-organ-transplant-patients-case-reports
#13
Monica Sircar, Camille Kotton, David Wojciechowski, Kassem Safa, Hannah Gilligan, Eliot Heher, Winfred Williams, Ravi Thadhani, Nina Tolkoff-Rubin
BACKGROUND: Voriconazole is frequently used to treat fungal infections in solid organ transplant patients. Recently, there have been reports suggesting that prolonged voriconazole therapy may lead to periostitis. AIM: Here we present two cases of voriconazole-induced periostitis in solid organ transplant patients. CASE PRESENTATION: Voriconazole was given to two transplant patients-one with a liver transplant and the second with a heart transplant, to treat their fungal infections...
November 2016: Journal of biosciences and medicines
https://www.readbyqxmd.com/read/27917370/multiple-myeloma-like-spinal-mri-findings-in-skeletal-fluorosis-an-unusual-presentation-of-fluoride-toxicity-in-human
#14
Javed Ahsan Quadri, Mohd Meraj Alam, Saba Sarwar, Ashraf Ghanai, A Shariff, Taposh K Das
Endemic fluorosis is a worldwide environmental problem due to excessive fluoride, commonly due to increased drinking water fluoride levels but sometimes due to other sources such as food with high fluoride content. In India, 21 of the 35 states are known to have health problems associated with fluoride toxicity. The present report is a case of a 50-year-old female who was seen with progressive spinal complications and a MRI of the spine suggestive of multiple myeloma. The MRI of the lumbosacral spine showed a diffuse and heterogeneous marrow signal of the lower dorsal and lumbosacral vertebrae...
2016: Frontiers in Oncology
https://www.readbyqxmd.com/read/27876966/evaluation-of-sodium-fluoride-toxicity-in-schistosoma-infected-snails-assessment-of-antioxidants-antiapoptotic-hypoprotein-and-hypocholesterol-activities
#15
Khaled M M Koriem, Radziyah B Shamsuri, Asliza M Ubaidillah
The snails' tissues represents an intermediate or secondary host for Schistosoma sporocysts where, germ cells within the secondary sporocyst begin to divide to produce thousands of cercariae capable of infecting humans. The aim of the study was to evaluate the toxicity of sodium fluoride in Schistosoma snails' tissue homogenates. A total number of 264 different Schistosoma snails were collected from eight drainage water resources and divided into control uninfected and infected snails; where infected snails divided into four group; the first group without any treatment while second, third and fourth groups immersed in 25, 50 and 100 mg sodium fluoride/L during the period of 4 weeks then the snails' hemolymph and tissue homogenates were prepared to evaluate the snail' tissue antioxidants, protein content, lipid profile and apoptosis...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27871895/protective-effect-of-lycopene-on-fluoride-induced-ameloblasts-apoptosis-and-dental-fluorosis-through-oxidative-stress-mediated-caspase-pathways
#16
Weishan Li, Binghua Jiang, Xianglin Cao, Yongjiang Xie, Ting Huang
Fluoride is an environmental toxicant and induces dental fluorosis and oxidative stress. Lycopene (LYC) is an effective antioxidant that is reported to attenuate fluoride toxicity. To determine the effects of LYC on sodium fluoride (NaF) -induced teeth and ameloblasts toxicity, rats were treated with NaF (10 mg/kg) and/or LYC (10 mg/kg) by orally administration for 5 weeks; ameloblasts were treated with NaF (5 mM) and/or LYC (2 μM) for 6 h. We found that the concentrations of fluoride, malondialdehyde (MDA) and reactive oxygen species (ROS), gene expressions and activities of Caspase-9 and Caspase-3, and the gene expressions of Bax were significantly decreased, while the activities of superoxide dismutase (SOD) and glutathione peroxidase (GPX), the gene expression of Bcl-2 were significantly increased in the LYC + NaF-treated rats group; concentrations of MDA and ROS, gene expressions and activities of Caspase-9 and Caspase-3, and the gene expression of Bax, and ameloblasts apoptosis rate were significantly decreased, while the activities of SOD and GPX, the gene expression of Bcl-2 were significantly increased in the LYC + NaF-treated ameloblasts group...
January 5, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27862939/cell-cycle-arrest-and-gene-expression-profiling-of-testis-in-mice-exposed-to-fluoride
#17
Kai Su, Zilong Sun, Ruiyan Niu, Ying Lei, Jing Cheng, Jundong Wang
Exposure to fluoride results in low reproductive capacity; however, the mechanism underlying the impact of fluoride on male productive system still remains obscure. To assess the potential toxicity in testis of mice administrated with fluoride, global genome microarray and real-time PCR were performed to detect and identify the altered transcriptions. The results revealed that 763 differentially expressed genes were identified, including 330 up-regulated and 433 down-regulated genes, which were involved in spermatogenesis, apoptosis, DNA damage, DNA replication, and cell differentiation...
November 14, 2016: Environmental Toxicology
https://www.readbyqxmd.com/read/27858711/cholinesterase-inhibitor-therapy-in-alzheimer-s-disease-the-limits-and-tolerability-of-irreversible-cns-selective-acetylcholinesterase-inhibition-in-primates
#18
Donald E Moss, Ruth G Perez, Haruo Kobayashi
Irreversible acetylcholinesterase (AChE) inhibition accumulates to high levels in the central nervous system (CNS) because AChE turnover in the brain is much slower than in peripheral tissues. As expected from this CNS selectivity, the irreversible AChE inhibitor methanesulfonyl fluoride (MSF) produces significant cognitive improvement in Alzheimer's disease patients without the gastrointestinal toxicity that plagues other AChE inhibitors. However, without dose-limiting gastrointestinal toxicity, one shortcoming of the prior human studies of MSF is that the upper limits of CNS AChE inhibition that might be tolerated could not be tested...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27854046/fluoride-exposure-aggravates-the-testicular-damage-and-sperm-quality-in-diabetic-mice-protective-role-of-ginseng-and-banaba
#19
Saumya Sm, P Mahaboob Basha
Fluoride toxicity is known to pose infertility in fluoride-intoxicated animals as well as in people residing in fluoride endemic zones. The present study addresses the degree of impairments caused due to co-exposure of high fluoride toxicity in diabetic mice. Swiss mice, Mus musculus, were subjected to fluoride toxicity by providing fluoride-supplemented drinking water (600 ppm NaF) for a period of 30 days after the confirmation of streptozotocin-induced diabetes(STZ, 50 mg/kgbw). Consequently, aggravated hyperglycemia and tissue fluoride accumulation were witnessed in fluoride-intoxicated diabetic mice; later, these toxicated mice were treated with ginseng extract (GE) and banaba leaf extract, (BLE) at dose of 150 mg/kgbw/day alone and in combination for 15 and 30-day duration to check the efficacy of phytoextracts in reversing the toxicity...
November 16, 2016: Biological Trace Element Research
https://www.readbyqxmd.com/read/27843247/comparative-evaluation-of-remineralizing-potential-of-three-pediatric-dentifrices
#20
REVIEW
Ashna Kapoor, K R Indushekar, Bhavna G Saraf, Neha Sheoran, Divesh Sardana
INTRODUCTION: Dentifrices are available in different formulations and more commonly a single dentifrice is used by whole family; be it an adult or child. However, concerns over high fluoride in pediatric formulations coupled with inability of the children to spit have led to recommendations to minimize fluoride ingestion during toothbrushing by using a small amount of toothpaste by children and incorporating minimal quantity of fluoride in the toothpastes. Literature is scarce on the remineralization potential of popularly known Indian pediatric dentifrices; hence, pediatric dentifrices containing lesser concentration of fluoride have been marketed relatively recently for the benefit of children without posing a threat of chronic fluoride toxicity at the same time...
July 2016: International Journal of Clinical Pediatric Dentistry
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