Baicalein ameliorated the upregulation of striatal glutamatergic transmission in the mice model of Parkinson's disease.

Abstract

Parkinson's disease (PD) is a common neurodegenerative disorder, which is characterized by a loss of projecting dopaminergic neurons in the substantia nigra and diminished dopamine level in the striatum. Dopaminergic deficit consequently leads to the alterations of striatal basal glutamatergic synaptic transmission and plasticity in the medium spiny neurons. The cytokines and neurotoxins released from the reactive immune cells induced the loss of the projecting dopaminergic neurons in the substantia nigra, which triggering the pathogenesis of PD. The present study investigated the effect of treatment with baicalein (5,6,7-trihydroxyflavone) on the central cytokine synthesis, striatal glutamatergic transmission, and behavioral performance in the rotarod task in the mice injected with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Treatment with baicalein significantly attenuated the upregulation of striatal basal glutamatergic strength by decreasing the presynaptic glutamate release and recovering the insertion of postsynaptic glutamate receptor subunit GluR1 induced by MPTP. It also significantly improved the behavioral performance in the rotarod task in the mice injected with MPTP. Treatment with baicalein decreased the upregulation of cytokines (tumor necrosis factor-α and interleukin-1β) in the substantia nigra and striatum in the mice injected with MPTP. These results indicated that baicalein might serve as novel approach for the treatment of the patients with PD.

• Authors: Xinhong Xue, Hong Liu, Lifeng Qi, Xueli Li, Cunju Guo, Dianrong Gong, Huaiqian Qu
• Journal: Brain research bulletin (Brain Res Bull) Vol. 103 Pg. 54-9 (Apr 2014) ISSN: 1873-2747 [Electronic] United States
• PMID: 24576689 (Publication Type: Journal Article)
• Copyright: Copyright © 2014 Elsevier Inc. All rights reserved.

Chemical References

• Cytokines
• Flavanones
• Receptors, AMPA
• Glutamic Acid
• baicalein
• glutamate receptor ionotropic, AMPA 1

Topics

• Animals
• Corpus Striatum (drug effects)
• Cytokines (metabolism)
• Disease Models, Animal
• Flavanones (pharmacology)
• Glutamic Acid (metabolism)
• MPTP Poisoning (physiopathology)
• Male
• Mice
• Mice, Inbred C57BL
• Motor Activity (drug effects)
• Receptors, AMPA (metabolism)
• Synaptic Transmission (drug effects)
• Up-Regulation