Moxibustion inhibits NLRP3/Caspase-1 pathway mediated cell pyroptosis and alleviates cerebral ischemia/reperfusion injury
- VernacularTitle:艾灸抑制NLRP3/Caspase-1通路介导的细胞焦亡减轻脑缺血再灌注损伤
- Author:
Yanyan YU
1
;
Juan LIU
;
Yue YANG
;
Qianhui WANG
;
Shan LI
;
Jie JIANG
Author Information
- Keywords: moxibustion; pyroptosis; cerebral ischemia/reperfusion injury; NLRP3; inflammasome; Caspase-1
- From: Chinese Journal of Tissue Engineering Research 2024;28(34):5473-5479
- CountryChina
- Language:Chinese
- Abstract: BACKGROUND:It was found that moxibustion can inhibit the inflammatory factors in the serum of rats with cerebral ischemia/reperfusion injury,resist oxidative stress,inhibit cell apoptosis,and effectively reduce cerebral ischemia/reperfusion injury. OBJECTIVE:To observe the effects of different moxibustion intervention time on the expression levels of nucleotide binding oligomerization domain-like protein 3 inflammasome(NLRP3),cysteine aspartase(caspase-1),apoptosis-related speck-like protein,exfoliatin-D protein,interleukin-1β and interleukin-18 in rats with cerebral ischemia/reperfusion injury,and to explore its action mechanism. METHODS:SD rats were randomly divided into sham operation group(n=9)and operation group(n=36).The model of focal cerebral ischemia/reperfusion injury was established by middle cerebral artery occlusion in the operation group.After successful modeling,the rats in the operation group were further divided into model group,moxibustion 10-minute group,moxibustion 15-minute group and moxibustion 30-minute group,with 9 rats in each group.Rats in the moxibustion 10-minute,15-minute and 30-minute groups were given moxibustion at"Baihui,Dazhui and Zusanli",respectively,once a day for a total of 7 days.The neurological deficits of rats were evaluated by LONGA method.The cerebral infarction was observed by 2,3,5-triphenyltetrazolium chloride staining.The pathological changes of brain tissue were observed by hematoxylin-eosin staining.The contents of interleukin-1β and interleukin-18 in serum of rats in each group were detected by ELISA.Immunohistochemistry and western blot assay were used to detect the expression levels of NLRP3,caspase-1,apoptosis-related spot-like protein and gasdermin D in the ischemic cortex of rats in each group. RESULTS AND CONCLUSION:Compared with the sham operation group,the neurological deficit score of the model group was significantly increased(P<0.01).Compared with the model group,the neurological deficit score of the moxibustion groups was significantly reduced(P<0.01).Compared with the sham operation group,the infarct volume of the model group was significantly increased(P<0.01).Compared with the model group,the infarct volume of the moxibustion groups was significantly reduced(P<0.01);the infarct volume of the rats was smallest in the moxibustion 30-minute group(P<0.05).Compared with the model group,the contents of inflammatory factors interleukin-1β and interleukin-18 in the serum of rats in the moxibustion groups were decreased(P<0.01).Compared with the moxibustion 10-minute group,the contents of inflammatory factors in the serum of rats in the moxibustion 30-minute group were significantly decreased(P<0.05).Compared with the model group,the expression of NLRP3,apoptosis-related spot-like protein,Caspase-1 and gasdermin D protein in the ischemic cortex of the moxibustion groups was significantly decreased(P<0.01).Compared with the moxibustion 10-minute and 15-minute groups,the expression of protein in the moxibustion 30-minute group was significantly decreased(P<0.05).It is concluded that moxibustion at Baihui,Dazhui and Zusanli can reduce cerebral ischemia/reperfusion injury,among which moxibustion for 30 minutes has the best effect,and its mechanism may be related to the inhibition of pyroptosis mediated by NLRP3/Caspase-1 pathway.
