Abstract
The effects of i.c.v. injection of AIDA, a group I mGluR antagonist, were studied on the nigral DA cells after MPTP-induced injury in the black mouse, using TH immunocytochemistry and unbiased stereology. MPTP reduced the total number of TH-IR neurons by 55.2% and non-TH-IR neurons by 27.5%. A 15 min AIDA pre-treatment (10 nmol) selectively counteracted the loss of TH-IR cells caused by MPTP as evaluated 10 days after the insult without changing the total number of non-neuronal cell nuclei. The results suggest that group I mGluR antagonists may have a neuroprotective role against MPTP-induced degeneration of DA neurons and thus probably also against neurodegenerative processes occurring in Parkinson's disease.
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