Abstract
The in vitro effects of two metabolites of inhalational anaesthetics, fluoride and bromide, on pseudocholinesterase (PCHE) and acetylcholinesterase (ACHE) activities in the blood samples of seven healthy patients were studied. The PCHE and ACHE activities were determined by kinetic spectrophotometric methods. Fluoride at the levels achieved with clinical concentrations of enflurane and sevoflurane (25-75 microM.L-1) inhibited PCHE activity by 28-65 per cent (P less than 0.01) and ACHE activity by less than five per cent (P greater than 0.05). Bromide at the levels achieved with clinical concentrations of inhalational anaesthetics had no significant effect on either PCHE or ACHE activity. We recommend caution when succinylcholine and/or ester type local anaesthetics are used in the immediate postoperative period following enflurane or sevoflurane anaesthesia. We also recommend that blood drawing for PCHE activity be delayed at least until 24 hr following enflurane or sevoflurane anaesthesia.
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Interplay of ROS and behavioral pattern in fluoride exposed Drosophila melanogaster.
Highlights NaF exposure increases mortality and changes male-female ratio in Drosophila. NaF treatment alters the activities endogenous antioxidant enzymes. Chronic sub-lethal NaF exposure causes increased oxidative damage. NaF decreases brain cell viability and increases DNA damage. NaF exposure alters selected behavioral pattern in Drosophila melanogaster. Reactive oxygen species (ROS) is
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National Toxicology Program Systematic literature review of animal studies.
Official citation: NTP (National Toxicology Program). 2016. Systematic Literature Review on the Effects of Fluoride on Learning and Memory in Animal Studies. NTP Research Report 1. Research Triangle Park, NC: National Toxicology Program. Conclusion (page 59): Very few studies assessed learning and memory effects in experimental animals (rats and mice) at exposure
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Rutin attenuates neurobehavioral deficits, oxidative stress, neuro-inflammation and apoptosis in fluoride treated rats.
Highlights The influence of rutin on fluoride – induced neurotoxicity in rat was studied. Rutin reversed the fluoride – induced neurobehavioral deficits in rats. Rutin reversed the fluoride – induced inhibition of acetylcholinesterase activity in rat cerebrum and striatum. Rutin enhanced antioxidant status and inhibited neuro-inflammation and apoptosis in fluoride
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A correlation between serum vitamin, acetylcholinesterase activity and IQ in children with excessive endemic fluoride exposure in Rajasthan, India
Fluoride is widely distributed in nature and a direct source of adverse health effects in human populations. Fluoride poisoning attributed by long-term exposure to high levels of fluoride [is] called fluorosis. The present study was carried out among 9-14 years old school children of Dausa district, Rajasthan India. The subjects
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Neurobehavioral and neurochemical effects in rats offspring co-exposed to arsenic and fluoride during development.
Highlights Arsenic/Fluoride co-exposure during development causes neurobehavioral alterations in offspring. iAs/F causes delayed development of sensorimotor reflexes and produces less nociceptive response. iAs/F co-exposure increase locomotor activity. Antioxidant enzymes and neurotransmitter level are altered in the striatum area. Arsenic (iAs) and fluoride (F) are ubiquitous in the environment. All over
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Fluoride's Effect on Fetal Brain
The human placenta does not prevent the passage of fluoride from a pregnant mother's bloodstream to the fetus. As a result, a fetus can be harmed by fluoride ingested pregnancy. Based on research from China, the fetal brain is one of the organs susceptible to fluoride poisoning. As highlighted by the excerpts
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Fluoride & IQ: 70 Studies
As of June 2021, a total of 78 studies have investigated the relationship between fluoride and human intelligence. Of these investigations, 70 studies have found that elevated fluoride exposure is associated with reduced IQ in humans, while over 60 animal studies have found that fluoride exposure impairs the learning and/or
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NRC (2006): Fluoride's Neurotoxicity and Neurobehavioral Effects
The NRC's analysis on fluoride and the brain.
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Fluoride: Developmental Neurotoxicity.
Developmental Neurotoxicity There has been a tremendous amount of research done on the association of exposure to fluoride with developmental neurotoxicity. There are over 60 studies reporting reduced IQ in children and several on the impaired learning/memory in animals. And there are studies which link fluoride to Attention Deficit Hyperactivity Disorder. Teaching
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Fluoride's Direct Effects on Brain: Animal Studies
The possibility that fluoride ingestion may impair intelligence and other indices of neurological function is supported by a vast body of animal research, including over 40 studies that have investigated fluoride's effects on brain quality in animals. As discussed by the National Research Council, the studies have consistently demonstrated that fluoride, at widely varying concentrations, is toxic to the brain.
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