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Intraventricular application of BDNF and NT-3 failed to protect nucleus basalis magnocellularis cholinergic neurones
M H Skup1, B C Figueiredo, A C Cuello
1Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada.
Abstract:
Quantitative analysis of ChAT immunoreactive neurones was used to evaluate the protective potential of BDNF or NT-3 against retrograde changes in nucleus basalis magnocellularis (nbm) cholinergic neurones after unilateral partial devascularization of the rat neocortex. A daily intracerebroventricular dose of 12 micrograms, proven to be effective for NGF and aFGF in the same experimental paradigm, was administered by minipump infusion for a 1-week period. Thirty days after lesioning, neuronal shrinkage and loss of neuritic processes were not prevented by treatment. The results indicate that intracerebroventricularly delivered BDNF and NT-3 are not as effective as NGF and aFGF in protection of nbm cholinergic neurones against lesion-induced changes in adult rat brain.