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[Neuroprotective effects of semax in MPTP-induced disturbances of brain dopamine system]
N G Levitskaia1, E A Sebentsova, L A Andreeva
1Institute of Molecular Genetics of the Russian Acad. Sci., 123182, Moscow' Moscow State University, 119899, Russia.
Abstract:
Effects of an ACTH (4-10) analogue Semax (MEHFPGP) on behaviour of white rats with MPTP-induced disturbances of brain DA-system have been studied. It was shown that MPTP administration (25 mg/kg) reduced motor activity and auhmented the anxiety level in rats. Semax administration (daily intranasal 0.2 mg/kg) attenuated behaviour disturbances induced by neurotoxin. The observed protective action of Semax in rats with MFTP-induced DA system disturbances may be due to both its modulating influence on the brain DA system and peptide neuroprotective effects.
Insights
The peptide Semax (MEHFPGP) reversed behavioral deficits in rats caused by MPTP neurotoxin. This suggests Semax offers neuroprotection for dopamine system disturbances.
Area of Science:
- Neuroscience
- Pharmacology
- Behavioral Science
Context:
- MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) is a neurotoxin that selectively damages dopaminergic neurons, modeling Parkinson's disease.
- Dopamine (DA) system dysfunction in the brain is implicated in motor and anxiety-related behaviors.
Purpose:
- To investigate the neuroprotective effects of the ACTH (4-10) analogue Semax (MEHFPGP) on MPTP-induced behavioral disturbances in rats.
- To assess Semax's impact on motor activity and anxiety levels following MPTP administration.
Summary:
- MPTP administration (25 mg/kg) significantly reduced motor activity and increased anxiety in white rats.
- Daily intranasal administration of Semax (0.2 mg/kg) attenuated these behavioral impairments.
- The findings suggest Semax exhibits protective effects against MPTP-induced dopaminergic neurotoxicity.
Impact:
- Semax demonstrates potential as a therapeutic agent for conditions involving dopamine system damage.
- The study highlights the dual neuroprotective mechanisms of Semax: modulation of the dopamine system and general peptide neuroprotection.
