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Effects of Fluoride on DNA Damage and Caspase-Mediated Apoptosis in the Liver of Rats.

Journal:
Biological trace element research


Issue Date:
2015


Abstract(summary):

Fluoride compounds are abundant and widely distributed in the environment at a variety of concentrations. Further, fluoride induces toxic effects in target organs such as the liver. In this study, we investigated liver histopathology, DNA damage, apoptosis, and the mRNA and protein expressions of caspase-3 and -9 in the rat livers by administering varying concentrations of fluoride (0, 50, 100, 200mg/L ) for 120days. The results showed fluoride-induced morphological changes and significantly increased apoptosis and DNA damage in rats exposed to fluoride, especially in response to higher doses. The immunohistochemical and qRT-PCR results indicated that caspase-3, caspase-9 protein positive expression and mRNA relative expression enhanced with increasing NaF concentration. In summary, our findings suggest that chronic exposure to fluoride causes damages to liver histopathology and leads to liver apoptosis through caspase-mediated pathways. =20


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