Abstract:
:The current study evidenced hypothesis that mitochondrial dysfunction-oxidative stress-dependent apoptotic pathways play a critical role in degeneration of dopaminergic neurons in Parkinson's disease. Model of rotenone-induced parkinsonism in rats produced decrease in striatal complex I activity and reduced glutathione with increase in nitrites concentration and caspase-3 activity. This was confirmed by significant correlation of catalepsy score with neurochemical parameters. Moreover, electron microscopic examination of striatal neurons displayed ultrastructure affection as hyperchromatic nuclei and disrupted mitochondria that are typical features of undergoing apoptosis. Administration of L-dopa as replacement therapy, although caused symptomatic improvement in catalepsy score, but further worsening in neurochemical parameters. Therefore, efforts are not only to improve effect of L-dopa, but also to introduce drugs provide antiparkinsonian and neuroprotective effects. In this study, α-lipoic acid exhibited noticeable neuroprotective effects by a mechanism via intervention of mitochondrial dysfunction-oxidative stress-dependent apoptotic pathways. Combination of α-lipoic acid efficiently halting deleterious toxic effects of L-dopa, revealed normalization of catalepsy score in addition to amelioration of neurochemical parameters and apparent preservation of striatal ultrastructure integrity, indicating benefit of both symptomatic and neuroprotective therapy. In conclusion, α-lipoic acid could be recommended as a disease-modifying therapy when given with L-dopa early in course of Parkinson's disease.
journal_name
Neurosci Resjournal_title
Neuroscience researchauthors
Abdin AA,Sarhan NIdoi
10.1016/j.neures.2011.08.008subject
Has Abstractpub_date
2011-12-01 00:00:00pages
387-95issue
4eissn
0168-0102issn
1872-8111pii
S0168-0102(11)02061-Xjournal_volume
71pub_type
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