the impact of paeoniflorin on α-synuclein degradation pathway
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2015
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Abstract
Paeoniflorin (PF) is the major active ingredient in the traditional Chinese medicine Radix. It plays a neuroprotective role by regulating autophagy and the ubiquitin-proteasome degradation pathway. In this study, we found PF significantly reduced cell damage caused by MPP+, returning cells to normal state. Cell viability significantly improved after 24 h exposure to RAPA and PF in the MPP+ group (all P<0.01). CAT and SOD activities were significantly decreased after PF and RAPA treatment, compared with MPP+ (P<0.001). In addition, MPP+ activated both LC3-II and E1; RAPA increased LC3-II but inhibited E1. PF significantly upregulated both LC3-II (autophagy) and E1 (ubiquitin-proteasome pathway) expression (P<0.001), promoted degradation of α-synuclein, and reduced cell damage. We show MPP+ enhanced immunofluorescence signal of intracellular α-synuclein and LC3. Fluorescence intensity of α-synuclein decreased after PF treatment. In conclusion, these data show PF reversed the decline of proteasome activity caused by MPP+ and significantly upregulated both autophagy and ubiquitin-proteasome pathways, promoted the degradation of α-synuclein, and reduced cell damage. These findings suggest PF is a potential therapeutic medicine for neurodegenerative diseases.
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| Reference Key |
cai2015evidence-basedthe
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| Authors | ;Zenglin Cai;Xinzhi Zhang;Yongjin Zhang;Xiuming Li;Jing Xu;Xiaomin Li |
| Journal | ACS applied materials & interfaces |
| Year | 2015 |
| DOI |
10.1155/2015/182495
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| URL | |
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