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Abstract Title:

Silibinin suppresses astroglial activation in a mouse model of acute Parkinson׳s disease by modulating the ERK and JNK signaling pathways.

Abstract Source:

Brain Res. 2015 Nov 19 ;1627:233-42. Epub 2015 Oct 3. PMID: 26434409

Abstract Author(s):

Yujeong Lee, Hye Jeong Chun, Kyung Moon Lee, Young-Suk Jung, Jaewon Lee

Article Affiliation:

Yujeong Lee

Abstract:

Parkinson's disease (PD) is the second-most common neurodegenerative disease after Alzheimer's disease, and is characterized by dopaminergic neuronal loss in midbrain. The MPTP-induced PD model has been well characterized by motor deficits and selective dopaminergic neuronal death accompanied by glial activation. Silibinin is a constituent of silymarin, an extract of milk thistle seeds, and has been proposed to have hepatoprotective, anti-cancer, anti-oxidative, and neuroprotective effects. In the present study, the authors studied the neuroprotective effects of silibinin in an acute MPTP model of PD. Silibinin was administered for 2 weeks, and then MPTP was administered to mice over 1 day (acute MPTP induced PD). Silibinin pretreatment effectively ameliorated motor dysfunction, dopaminergic neuronal loss, and glial activations caused by MPTP. In addition, an in vitro study demonstrated that silibinin suppressed astroglial activation and ERK and JNK phosphorylation in primary astrocytes in response to MPP(+) treatment. These findings show silibinin protected dopaminergic neurons in an acute MPTP-induced mouse model of PD, and suggest its neuroprotective effects might be mediated by the suppression of astrocyte activation via the inhibition of ERK and JNK phosphorylation. In conclusion, the study indicates silibinin should be viewed as a potential treatment for PD and other neurodegenerative diseases associated with neuroinflammation.

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Sayer Ji
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