PMID: 9443930Jan 28, 1998Paper

Nuclear factor-kappa B contributes to excitotoxin-induced apoptosis in rat striatum

Molecular Pharmacology
Z H QinT N Chase

Abstract

Excitotoxin-induced destruction of striatal neurons, proposed as a model of Huntington's disease, involves a process having the biochemical stigmata of apoptosis. Recent studies suggested that transcription factor nuclear factor (NF)-kappa B may be involved in excitotoxicity. To further analyze the contribution of NF kappa B to excitotoxic neuronal death in vivo, changes in binding activities of NF kappa B and other transcription factors as well as the consequences of inhibiting NF kappa B nuclear translocation were measured after the infusion of quinolinic acid (120 nmol) into rat striatum. Internucleosomal DNA fragmentation and terminal transferase-mediated dUTP digoxigenin nick end labeling-positive nuclei appeared 12 hr later and intensified over the next 12 hr. NF kappa B binding activity increased several-fold from 2 to 12 hr, then gradually declined during the next 12 hr. Other transcription factor changes included AP-1, whose binding peaked about 6 hr after quinolinic acid administration, and E2F-1, which was only modestly and transiently elevated. In contrast, quinolinic acid lead to a reduction in OCT-1, beginning after 12 hr, and briefly in SP-1 binding. The NF kappa B, AP-1, and OCT-1 changes were attenuated both by...Continue Reading

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Citations

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