Absence of excitotoxic neuropathology in microencephalic rats after systemic kainic acid administration.

Abstract:

:We have s.c. injected with kainic acid (12 mg/kg) normal adult rats as well as rats rendered microencephalic by selectively timed administration of the DNA alkylating agent methylazoxymethanol acetate (MAM) to the mother during pregnancy. Histological examination of the brains revealed that normal animals underwent neurodegeneration in brain regions sensitive to kainic acid excitotoxicity, such as the olfactory cortex and the hippocampus, while no damage was apparent in the same regions of microencephalic rats. Evaluation of the neurotoxic outcome consequent to the excitotoxic stimulation, was quantitatively performed by measuring the levels of appropriate neurochemical markers 15 days after kainic acid injection. In normal animals, this resulted in significant decrease (up to 60% in the olfactory cortex and 30% in the hippocampus) of markers related to glutamatergic and GABAergic neurons, whereas in MAM-treated rats the same markers were not significantly affected, thus demonstrating a substantial protection against the excitotoxic insult in the microencephalic condition.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Virgili M,Ciani E,Contestabile A

doi

10.1016/0304-3940(96)13081-0

subject

Has Abstract

pub_date

1996-10-25 00:00:00

pages

57-61

issue

1

eissn

0304-3940

issn

1872-7972

pii

S0304394096130810

journal_volume

218

pub_type

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