Abstract
Oral administration of sodium fluoride (NaF) (5 and 10 mg/kg body weight/day) for 30 days to adult male rats, brought about a reduction in body weight especially by high dose (10 mg/kg body weight). In fluorotic rats, testicular cholesterol and serum testosterone levels were not affected. However, succinate dehydrogenase activity in testis was inhibited. Similarly, adenosine triphosphatase activity and sialic acid levels in epididymides were also suppressed with more pronounced effect on cauda epididymis. Consequently, sperm motility and count were decreased leading to a significant decline in fertility by fluoride treatment. Hence, rat is also sensitive to fluoride toxicity.
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Suppression of male reproduction in rats after exposure to sodium fluoride during early stages of development
Sodium fluoride (NaF), a widespread natural pollutant was given to sperm-positive female rats throughout gestation and lactation at a dose of 4.5 and 9.0 ppm via drinking water. The neonates were allowed to grow up to 90 days on tap water, and then sperm parameters, testicular steroidogenic marker enzyme activity
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Fluoride reduced CRISP 2 expression in testis and epididymal sperm of rats.
Fluorine, an active element which is widely distributed in the environment, has been demonstrated to have adverse effects on male reproductive systems at a high dose. The objective of the present study was to explore the key role of cysteine-rich secretory protein (CRISP)2 in fluoride-induced male reproductive toxicity by investigating,
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Fluoride + aluminum induced toxicity in mice testis witih giant cells and its reversal by vitamin C
Administration of sodium fluoride (NaF, 10 mg/kg bw) together with aluminium chloride (AlCl3, 200 mg/kg bw) to adult male mice for 30 days resulted in structural alterations in the testis with formation of giant cells. These changes along with lower protein levels affected spermatogenesis. Steroidogenesis was also altered since the
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Fluoride toxicity in the testis and cauda epididymis of guinea pig and reversal by ascorbate
Effects of sodium fluoride (NaF) (30 mg kg-1 body weight) and ascorbic acid ingestion along with sodium fluoride for 30 days each were studied to evaluate its possible role as an ameliorative agent on functions of reproductive organs and spermatozoa of the fluorotic guinea pig. The cauda epididymal spermatozoa were
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Fluoride exposure changed the structure and the function of sperm in the testis and epididymis of male rats.
This study systematically investigated the effects of fluoride ion (F)exposure on the male reproductive organ and on spermatogenesis. Twenty male rats were divided into two groups of 10 and treated with 0 or 150 mg F/L in drinking water. After 70 days, the body weight, organ coefficients of the testis
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Fluoride's Effect on Male Reproductive System -- The "Sprando/Collins" Anomaly
In contrast to the findings of overĀ 60 animal studiesĀ from other research teams, a series of studies by FDA researchers Sprando & Collins reported virtually no evidence of reproductive toxicity among animals treated with very high levels of fluoride exposure. The reasons for this discrepancy remains unclear. Excerpts from Sprando/Collins' Studies: "This study
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Fluoride's Effect on Male Reproductive System - Human Studies
Consistent with in vitro and animal research, studies of human populations have reported associations between fluoride exposure and damage to the male reproductive system. Most notably, a scientist at the Food & Drug Administration reported in 1994 that populations in the United States with more than 3 ppm fluoride in their water had lower "total fertility rates" than populations with lower fluoride levels.
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Fluoride's Effect on Male Reproductive System: Animal Studies
Over 60 studies on animals (including rats, mice, roosters, and rabbits) have found that fluoride adversely impacts the male reproductive system. These studies have repeatedly found the following effects: (1) decreases in testosterone levels; (2) reduced sperm motility; (3) altered sperm morphology; (4) reduced sperm quantity; (5) increased oxidative stress; (6) and reduced capacity to breed.
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Fluoride's Effect on the Male Reproductive System -- In Vitro Studies
Carefully controlled in vitro studies have found that direct exposure of fluoride to the testes or semen inhibits testosterone production and damages sperm. While researchers have known since the 1930s that mega concentrations of fluoride can completely (but reversibly) immobilize sperm, it was not until the 1970s and 1980s that researchers found that relatively modest concentrations of fluoride could cause damage prior to complete immobilization.
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