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Determination of experimentally given homocysteine causes to alzheimer-like dementia in rats on the basis of different parameters

Mine Dosay Akbulut, Ayhan Vurmaz.


Alzheimer’s disease (AD) is the most seen form of neurodegenerative disease with specific pathological findings like; senile plaques (CPs), synaptic loss, neurofibrillary tangles (NFTs) and neurodegeneration. Homocysteine is a naturally occurring amino acid and have a role on the body’s methylation process. In this study, total 12 rats, were used and divided into 2 groups. Group 1 Control group (n = 6): No rats were treated. Group 2 Application of High-Dose Homocysteine (n = 6): For 5 weeks, 4 mg / kg / day; to create an experimental Alzheimer model. Morris Water Maze test, the MDA, homocysteine (Hcy), reduced glutathione (GSH) and oxidised glutathione (GSSG) levels in rat liver, serum and erythrocyte samples were studied. Mitogen activated protein kinase (MAPK) and beta-secretase (BACE1) mRNA levels and pathological examinations were performed in rat hippocampus samples. The reaching time to exit platform was longer in the Hcy group according to Morris Water Maze test. Neurodegenerative areas were observed in the hippocampus CA1 region of Hcy group. Liver and serum Hcy and MDA levels and liver and erythrocyte GSSG levels were significantly higher (p

Key words: Homocystein, alzheimer, dementia and markers

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