Abstract
Oxidative stress to dopaminergic neurons is believed to be one of the causes of neurodegeneration in Parkinson's disease (PD). It was investigated whether N-acetylcysteine (NAC) and l-2-oxothiazolidine-4-carboxylate (OTC) have a preventive effect in an oxidative stress-induced model of PD. We found that NAC and OTC prevent degradation of PARP during auto-oxidized dopamine- or auto-oxidized L-DOPA-induced apoptosis in PC12 cells. In an animal model study, NAC and OTC showed a preventive effect against MPTP-induced loss of tyrosine hydroxylase-positive neurons, and suppressed the nuclear translocation of c-jun N-terminal kinase (JNK), suggesting that NAC and OTC can prevent MPTP-induced apoptosis by suppressing JNK activation. Therefore, these results suggest that NAC and OTC can be used as potential agents to prevent the progression of PD.
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