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Metabolic Brain Disease

, Volume 30, Issue 1, pp 205–213 | Cite as

The neuroprotective potential of sinapic acid in the 6-hydroxydopamine-induced hemi-parkinsonian rat

  • Kobra Zare
  • Akram Eidi
  • Mehrdad Roghani
  • Ali Haeri Rohani
Research Article

Abstract

Parkinson’s disease (PD) is a neurodegenerative movement disorder due to selective loss of dopaminergic neurons of mesencephalic substantia nigra pars compacta (SNC) with debilitating motor symptoms. Current treatments for PD afford symptomatic relief with no prevention of disease progression. Due to the antioxidant and neuroprotective potential of sinapic acid, this study was conducted to evaluate whether this agent could be of benefit in an experimental model of early PD in rat. Unilateral intrastriatal 6-hydroxydopamine (6-OHDA)-lesioned rats were pretreated p.o. with sinapic acid at doses of 10 or 20 mg/kg. One week after surgery, apomorphine caused significant contralateral rotations, a significant reduction in the number of Nissl-stained and tyrosine hydroxylase (TH)-positive neurons and a significant increase of iron reactivity on the left side of SNC. Meanwhile, malondialdehyde (MDA) and nitrite levels in midbrain homogenate significantly increased and activity of superoxide dismutase (SOD) significantly reduced in the 6-OHDA-lesioned group. In addition, sinapic acid at a dose of 20 mg/kg significantly improved turning behavior, prevented loss of SNC dopaminergic neurons, lowered iron reactivity, and attenuated level of MDA and nitrite. These results indicate the neuroprotective potential of sinapic acid against 6-OHDA neurotoxicity that is partially due to the attenuation of oxidative stress and possibly lowering nigral iron level.

Keywords

Sinapic acid Parkinson’s disease 6-hydroxydopamine Neuroprotection Oxidative stress 

Notes

Acknowledgments

This work was the results of a Ph. D. thesis project financially funded and supported by Science and Research Branch of the Islamic Azad University (Tehran, Iran) in 2012. The authors would also like to appreciate Fariba Ansari and Maryam Sharayely for their great technical assistance.

Conflict of interest

There is no conflict of interest.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of Biology, Science and Research BranchIslamic Azad UniversityTehranIran
  2. 2.Neurophysiology Research CenterShahed UniversityTehranIran

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