1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced astrogliosis does not require activation of ornithine decarboxylase.

Journal Article

Mechanical injury to the brain results in enhanced immunostaining for glial fibrillary acidic protein (GFAP) that is markedly inhibited by difluoromethylornithine (DFMO), an irreversible inhibitor of ornithine decarboxylase. In the current study, systemic exposure of mice to the dopaminergic neurotoxicant, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), also increased GFAP but, unlike mechanical injury, this increase was not prevented by DFMO pretreatment. These results indicate that de novo polyamine biosynthesis is not obligatory for the MPTP-induced increase in GFAP. MPTP administration, unlike mechanical injury, does not disrupt the blood-brain barrier; thus, a role for polyamine biosynthesis in the astrocyte response to injury may be restricted to insults involving a compromised blood-brain barrier.

Full Text

Duke Authors

Cited Authors

  • O'Callaghan, JP; Seidler, FJ

Published Date

  • December 14, 1992

Published In

Volume / Issue

  • 148 / 1-2

Start / End Page

  • 105 - 108

PubMed ID

  • 1300481

International Standard Serial Number (ISSN)

  • 0304-3940

Language

  • eng

Conference Location

  • Ireland