Abstract
Thirty-two one-month-old Wistar albino rats were divided randomly into four equal groups of eight (female:male = 3:1). To assess damage to DNA in their brain cells, the first group (1) of rats served as the untreated control, the second group (2) was administered high fluoride (HiF, 100 mg NaF/L in the drinking water), the third group (3) was placed on a low iodine intake (LI, 0.0855 mg I/kg diet), and the fourth group (4) was exposed to the same high fluoride and low iodine combined (HiF+LI). At 20 months of age, the rats were anesthetized and their brain cells prepared for single cell gel electrophoresis (SCGE = comet assay). DNA damage in the brain cells assessed by the tailing ratio percent was 24.68±20.81% in the control group 1 and in the HiF, LI, and HiF+LI groups 2, 3, and 4, it was 90.93±9.17%, 89.04±4.99%, and 92.48±4.04%, respectively. Moreover,the proportion of grade III damage to the brain cells increased by 24.00% in the HiF group 2, 21.88% in the LI group 3, and 33.33% in the HiF+LI group 4, but only by 8.0% in the control group 1. These results indicate that DNA strands in the brain cells of rats are adversely affected by exposure to high fluoride, low iodine, and together in combination.
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[Effects of selenium and zinc on the DNA damage caused by fluoride in pallium neural cells of rats].
To investigate the effects of fluoride on DNA damage as well as the effects of selenium and zinc against fluoride respectively or jointly in pallium neural cells of rats, single cell gel electrophoresis was used to detect the DNA damage of neural cells prepared in vitro. The results showed that
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Apoptosis in brain cells of offspring rats exposed to high fluoride and low iodine.
To assess brain cell apoptosis induced by high fluoride and/or low iodine in their offspring, 32 one-month old Wistar albino rats were divided randomly into four equal groups, each with six females and two males. The first group of rats served as the untreated controls; the second group received high
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[Influence of combined iodine and fluoride on phospholipid and fatty acid composition in brain cells of rats].
OBJECTIVE: Investigating the influence of combined iodine and fluoride on phospholipid and fatty acid composition in brain cells of rats. METHODS: Five groups of rats were provided with deionized drinking water containing 0 and 150 mg/L NaF, and containing both 150 mg/L NaF and 0.003, 0.03 or 3 mg/L KI respectively
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Co-exposure to arsenic and fluoride on oxidative stress, glutathione linked enzymes, biogenic amines and DNA damage in mouse brain.
We studied the effects of combined exposure to arsenic and fluoride on (i) brain biogenic amines, oxidative stress and its correlation with glutathione and linked enzymes; (ii) alterations in the structural integrity of DNA; and (iii) brain and blood arsenic and fluoride levels. Efficacy of alpha-tocopherol in reducing these changes
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[Study of the mechanism of neurone apoptosis in rats from the chronic fluorosis].
Objective: Study the mechanism of action chronic fluorosis in neurones. Methods: Terminal deoxyribo-nucleotide transferase-mediated dUTP-biotin nick end labeling (TUNEL) and flow cytometry (FCM) were used to observe changes of apoptosis in cerebral cells in chronic fluorosis in rats. Results: TUNEL results show non-random expression of DAB positive stain apoptosis cells which appear
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The Relationship Between Fluoride Exposure & Goitre in South Africa
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Fluoride & Oxidative Stress
A vast body of research demonstrates that fluoride exposure increases oxidative stress. Based on this research, it is believed that fluoride-induced oxidative stress is a key mechanism underlying the various toxic effects associated with fluoride exposure. It is also well established that fluoride's toxic effects can be ameliorated by exposure
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Fluoride & IQ: 76 Studies
Note: See the Updated list of fluoride IQ studies at https://fluoridealert.org/researchers/fluoride-iq-studies/the-fluoride-iq-studies/ • As of July 18, 2022, a total of 85 human studies have investigated the relationship between fluoride and human intelligence. • Of these investigations, 76 studies have reported that elevated fluoride exposure is associated with reduced IQ in humans. • The studies
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Fluoride Exposure Increases Metabolic Requirement for Calcium & Vitamin D
It is well known that individuals with nutrient deficiencies are more susceptible to fluoride toxicity, including fluoride's bone effects. As discussed in the following studies, fluoride increases the skeleton's need for calcium (and vitamin D) by increasing the amount of unmineralized tissue (osteoid) in the bone. When insufficient calcium and
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NRC (2006): Fluoride's Neurotoxicity and Neurobehavioral Effects
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