Abstract
The zitter rat exhibits a progressive degradation in neuronal cells and genetic spongiform encephalopathy with age. In order to elucidate the involvement of the expression of the neurotrophic factor in neuropathology of the rat, we quantified mRNA levels of neurotrophic factors (nerve growth factor, brain-derived neurotrophic factor (BDNF), and neurotrophin-3, ciliary neurotrophic factor and glial-cell-line-derived neurotrophic factor) in the zitter rat brain. Expression of the BDNF gene was lower in the zitter rat brain (cerebrum, cerebellum, and brainstem regions). Interestingly, kinase activity of mitogen activated protein kinase (MAPK) Erk2 involved in the expression of BDNF was also down regulated, despite an unchanging expression of MAPK protein. These results show the possible involvement of a MAPK pathway in BDNF mRNA reduction in the zitter rat brain.
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