SONG Zhen-yan,XIA Xiao-fang,WANG Yu-ke,et al.Danggui Shaoyaosan Inhibits Neuroinflammation in AD Rats by Regulating NLRP3/Caspase-1 Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(19):1-8.
SONG Zhen-yan,XIA Xiao-fang,WANG Yu-ke,et al.Danggui Shaoyaosan Inhibits Neuroinflammation in AD Rats by Regulating NLRP3/Caspase-1 Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(19):1-8. DOI: 10.13422/j.cnki.syfjx.20211802.
Danggui Shaoyaosan Inhibits Neuroinflammation in AD Rats by Regulating NLRP3/Caspase-1 Pathway
To investigate the neuroprotective effect of Danggui Shaoyaosan (DSS) in a rat model of amyloid-
β
-peptide
1-42
(A
β
1-42
)-induced Alzheimer's disease (AD) as well as its regulatory effect on NOD-like receptor protein 3 (NLRP3)/cysteinyl aspartate-specific protease-1 (Caspase-1) signaling pathway.
Method
2
The AD animal model was established via intracerebral injection of A
β
1-42
and treated with different concentrations of DSS after the division of rats into the sham operation group, model group, as well as the high-, medium-, and low-dose DSS groups. Morris water maze test was conducted to determine the learning and memory abilities of rats. The morphology and function of neurons were detected by hematoxylin-eosin (HE) staining and Golgi staining, followed by immunofluorescence co-localization of NLRP3 inflammasome activation. The mRNA expression levels of interleukin (IL)-1
β
and IL-18 were measured by Real-time polymerase chain reaction (Real-time PCR), and the protein expression levels of NLRP3, Caspase-1, and IL-1
β
were assayed by Western blot.
Result
2
Compared with the sham operation group, the model group exhibited significantly decreased learning and memory abilities (
P
<
0.01), impaired neuronal morphology and function, up-regulated IL-1
β
and IL-18 mRNA expression, enhanced NLRP3 inflammasome activation, and elevated NLRP3, Caspase-1, and IL-1
β
protein expression (
P
<
0.01). Compared with the model group, DSS at both medium and high doses remarkably improved the learning and memory abilities of AD rats (
P
<
0.05,
P
<
0.01), restored neuronal morphology and function, down-regulated the mRNA expression levels of inflammatory factors IL-1
β
and IL-18, reduced the activation of NLRP3 inflammasomes, and lowered the protein expression levels of NLRP3, Caspase-1, and IL-1
β
(
P
<
0.01).
Conclusion
2
DSS inhibits inflammasome activation and neuroinflammatory response possibly by regulating the NLRP3/Caspase-1 signaling pathway, thus exerting the neuroprotective effect.
关键词
Keywords
references
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