Repositori URV

Identifier: TDX:920

Handle: https://hdl.handle.net/20.500.11797/TDX920

Authors:
Salazar, José Gregorio

Abstract:
Chlorpyrifos (CPF) is a widely used organophosphate insecticide. Neurotoxic effects derive primarily from the inhibition of cholinesterase. Different studies have shown behavioral and cognitive effects of exposure to CPF. In the present study, we evaluated the neurobehavioral effects resulting from exposure to an acute dose and repeated doses of CPF, in a transgenic mouse model (Tg2576) carrying the Swedish mutation responsible for a familial form of Alzheimer's disease. We evaluated the effects on exploratory activity, learning and spatial memory and motor coordination. Acetylcholinesterase activity, levels of beta-amyloid (1-40, 1-42), proliferation and cell differentiation and expression of BACE1, were determined. The results showed cognitive improvement in Tg exposed to CPF. However, we observed an increase in the levels of A in the treated Tg, which would be a long term worsening of the neurodegenerative process.