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3-Nitropropionic Acid's Lethal Triplet: Cooperative Pathways of Neurodegeneration

Overview
Journal Neuroreport
Specialty Neurology
Date 1998 Aug 29
PMID 9721909
Citations 34
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Abstract

3-Nitropropionic acid (3-NP) is a mitochondrial toxin which interferes with ATP synthesis. Accidental ingestion of 3-NP by humans as well as other mammals results in neuronal degeneration within the basal ganglia and movement dysfunction characterized by dystonia, chorea, and hypokinesia. The selective degeneration of structures of the basal ganglia occurs despite the non-selective impairment of energy metabolism throughout the brain and body. These effects of 3-NP are shared with the genetic disorder Huntington's disease (HD), which is characterized by progressive neurodegeneration of the basal ganglia and choreic motor dysfunction. These similarities have prompted further investigation of 3-NP as an animal model of HD. Metabolic compromise with 3-NP causes neurodegeneration that involves three interacting processes: energy impairment, excitotoxicity, and oxidative stress. This triplet of cooperative pathways of neurodegeneration helps to explain 3-NP's regional selectivity of neurotoxicity to the basal ganglia. This mini-review will focus on the actions of 3-NP and the related compound, malonic acid (MA), in the central nervous system, with an emphasis on the more current findings regarding their mechanisms of action.

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