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湖南中医药大学 中西医结合心脑疾病防治湖南省重点实验室,长沙 410208
宋祯彦,硕士,实验师,从事中西医结合神经退行性疾病防治研究,E-mail:songzhenyan2013@hnucm.edu.cn
李平,实验师,从事中西医结合神经退行性疾病防治研究,Tel:0731-88458257,E-mail:373162392@qq.com
成绍武,教授,从事中西医结合神经退行性疾病防治研究,Tel:0731-88458257,E-mail:scheng@hnucm.edu.cn
收稿日期:2021-04-20,
网络出版日期:2021-07-29,
纸质出版日期:2021-10-05
移动端阅览
宋祯彦,夏小芳,王玉珂等.当归芍药散通过调控NLRP3/Caspase-1信号通路抑制AD大鼠神经炎症的作用[J].中国实验方剂学杂志,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.
宋祯彦,夏小芳,王玉珂等.当归芍药散通过调控NLRP3/Caspase-1信号通路抑制AD大鼠神经炎症的作用[J].中国实验方剂学杂志,2021,27(19):1-8. DOI: 10.13422/j.cnki.syfjx.20211802.
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.
目的
2
研究当归芍药散对
β
淀粉样蛋白
1-42
(A
β
1-42
)诱导的阿尔茨海默病(AD)大鼠模型的神经保护作用及对NOD样受体3(NLRP3)/半胱氨酸天冬氨酸蛋白水解酶-1(Caspase-1)信号通路的调控作用。
方法
2
大鼠脑内注射A
β
1-42
构建AD动物模型,给予不同浓度的当归芍药散治疗。实验分为假手术组,模型组,当归芍药散高、中、低剂量干预组。Morris水迷宫实验检测动物学习记忆能力;苏木素-伊红(HE)染色和高尔基染色检测神经元形态功能;免疫荧光共定位检测NLRP3炎症小体活化情况;实时荧光定量聚合酶链式反应(Real-time PCR)检测炎症因子白细胞介素-1
β
(IL-1
β
)和IL-18 mRNA表达情况;蛋白免疫印迹法(Western blot)检测NLRP3,Caspase-1,IL-1
β
蛋白的表达水平。
结果
2
与假手术组比较,模型组大鼠学习记忆能力显著降低(
P
<
0.01);神经元形态功能受损;炎症因子IL-1
β
和IL-18 mRNA表达升高,NLRP3炎症小体活化增加,NLRP3,Caspase-1,IL-1
β
蛋白表达显著升高(
P
<
0.01);与模型组比较,给予当归芍药散中、高剂量干预后,AD大鼠学习记忆能力明显增加(
P
<
0.05,
P
<
0.01);神经元形态功能明显恢复;炎症因子IL-1
β
和IL-18 mRNA表达显著降低,NLRP3炎症小体活化减少,NLRP3,Caspase-1,IL-1
β
蛋白表达显著降低(
P
<
0.01)。
结论
2
当归芍药散可能通过调控NLRP3/Caspase-1信号通路抑制炎症小体活化,抑制神经炎症反应,从而发挥神经保护作用。
Objective
2
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.
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