ZHANG Jing,ZHANG Yu,TANG Lu-lu,et al.Effect of Gandou Decoction on Mitophagy in Toxic Milk (TX) Mouse Model of Wilson Disease Based on Pink1/Parkin Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(12):111-118.
ZHANG Jing,ZHANG Yu,TANG Lu-lu,et al.Effect of Gandou Decoction on Mitophagy in Toxic Milk (TX) Mouse Model of Wilson Disease Based on Pink1/Parkin Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(12):111-118. DOI: 10.13422/j.cnki.syfjx.20221236.
Effect of Gandou Decoction on Mitophagy in Toxic Milk (TX) Mouse Model of Wilson Disease Based on Pink1/Parkin Pathway
To investigate the effects of Gandou decoction (GDD) on the mitophagy of hippocampal neurons in toxic milk (TX) mouse model of Wilson disease and explore the protective mechanism of GDD against neuron injury through the PTEN induced kinase 1 (Pink1) /E3 ubiquitin ligase (Parkin) pathway.
Method
2
Sixty mice were randomly divided into a blank group, a model group, a penicillamine group (0.09 g·kg
-1
), and low- (5.5 g·kg
-1
), medium- (11 g·kg
-1
), and high-dose (22 g·kg
-1
) GDD groups, and treated correspondingly by gavage for 8 weeks. Morris water maze, traction test, and pole test were used for the evaluation of animal behaviors. Hematoxylin-eosin (HE) staining and transmission electron microscopy were used to observe cell apoptosis, ultrastructure, autophagy, and mitochondrial structure. The levels of superoxide dismutase (SOD), reactive oxygen species (ROS), and malondialdehyde (MDA) were detected by enzyme-linked immunosorbent assay (ELISA). Real-time fluorescence-based quantitative polymerase chain reaction (Real-time PCR) was used to detect the mRNA expression of Pink1, Parkin, autophagy-associated protein Beclin-1, microtubule-associated protein 1 light chain 3Ⅱ (LC3Ⅱ), and p62. Western blot was conducted to detect the protein expression of Pink1, Parkin, Beclin-1, LC3Ⅱ/Ⅰ, and p62.
Result
2
Compared with the blank group, the model group showed prolonged escape latency, decreased times of platform crossing, lower score in the traction test, and longer pole climbing time (
P
<
0.01). Compared with the model group, the medium- and high-dose GDD groups and the penicillamine group showed shortened escape latencies, increased times of platform crossing, higher scores in the traction test, and shortened pole climbing time (
P
<
0.01). Compared with the blank group, the model group displayed severely damaged neurons and increased autophagosomes. Compared with the model group, the medium- and high-dose GDD groups and the penicillamine group showed improved neuron damage and reduced autophagosomes. The levels of ROS and MDA were higher and SOD was lower in the model group than those in the blank group (
P
<
0.01), while the levels of the above indicators were reversed by GDD intervention as compared with the model group (
P
<
0.01). Compared with the blank group, the model group exhibited up-regulated mRNA and protein expression of Pink1, Parkin, LC3Ⅱ, and Beclin-1 and down-regulated p62 (
P
<
0.05). Compared with the model group, the medium- and high-dose GDD groups showed reduced mRNA and protein expression of Pink1, Parkin, LC3Ⅱ, and Beclin-1 and increased p62 (
P
<
0.05,
P
<
0.01).
Conclusion
2
GDD can significantly inhibit the excessive mitophagy in neurons of TX mice and protect neurons from damage. The mechanism may be related to the regulation of the Pink1/Parkin pathway.
关键词
Keywords
references
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