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重庆医科大学中医药学院中医防治代谢性疾病重庆市重点实验室,重庆 400016
李明娇,Email:1819602769@qq.com,研究方向:脊髓损伤的电针疗法及机制。
黄思琴,Email:huangsiqin@cqmu.edu.cn。
收稿:2024-01-22,
修回:2024-03-11,
录用:2024-05-22,
纸质出版:2025-03-28
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李明娇,唐成林,杨祝歆,等.电针调控PPARγ-CD36信号通路降低Hba-a1、Hbb-bt表达减轻脊髓损伤后细胞凋亡的研究[J].重庆医科大学学报,2025,50(3):311-321.
Li Mingjiao,Tang Chenglin,Yang Zhuxin,et al.Electroacupuncture reduces the expression of Hba-a1 and Hbb-bt and alleviates cell apoptosis after spinal cord injury by regulating the PPARγ-CD36 signaling pathway[J].Journal of Chongqing Medical University,2025,50(3):311-321.
李明娇,唐成林,杨祝歆,等.电针调控PPARγ-CD36信号通路降低Hba-a1、Hbb-bt表达减轻脊髓损伤后细胞凋亡的研究[J].重庆医科大学学报,2025,50(3):311-321. DOI: 10.13406/j.cnki.cyxb.003784.
Li Mingjiao,Tang Chenglin,Yang Zhuxin,et al.Electroacupuncture reduces the expression of Hba-a1 and Hbb-bt and alleviates cell apoptosis after spinal cord injury by regulating the PPARγ-CD36 signaling pathway[J].Journal of Chongqing Medical University,2025,50(3):311-321. DOI: 10.13406/j.cnki.cyxb.003784.
目的
2
本研究旨在建立脊髓损伤小鼠模型探讨电针(electroacupuncture,EA)干预小鼠急性脊髓损伤(spinal cord injury,SCI)后细胞凋亡的作用和机制。
方法
2
采用雌性C 57 BL/6小鼠进行SCI造模,造模成功后使用随机法分为:脊髓损伤组(SCI组)、Electroacupuncture组(EA组)、Rosiglitazone组(R组),另设立假手术组(Sham组)。造模成功后对EA组小鼠取双侧“夹脊穴”和“足三里穴”进行电针,每日1次,连续治疗14 d;R组腹腔注射过氧化物酶体增殖物激活受体γ(peroxisome proliferator activated receptor γ,PPARγ)激动剂:Rosiglitazone(5 mg/kg),Sham及SCI组不予特殊干预。采用小鼠后肢运动功能评分系统(basso mouse scale,BMS)评分评价运动功能,HE染色法、免疫荧光法检测脊髓损伤后的病理改变,转录组测序(RNA sequencing,RNA-Seq)、定量蛋白质组学(tandem mass tag/isobaric tags for relative and absolute quantification,TMT/iTRAQ)技术检测电针作用的靶点及机制,Western blot法检测PPARγ、分化簇36(cluster of differentiation 36,CD36)、血红蛋白亚基α1(hemoglobin alpha,adult chain 1,Hba-a1)、血红蛋白β亚基(hemoglobin,beta adult t chain,Hbb-bt)、胱氨酸蛋白酶-3(Caspase-3,CASP3)蛋白表达水平。
结果
2
与SCI组相比,EA组和R组的后肢运动功能、组织结构和残存细胞数量均有改善。EA组和R组Caspase-3表达降低,PPARγ和CD36表达增加,EA组Hba-a1和Hbb-bt表达降低。此外,RNA-Seq、TMT/iTRAQ技术结果分析、韦恩分析及双组学联合分析确定了Hba-a1和Hbb-bt为电针作用的靶基因。KEGG通路富集分析表明电针被证明对PPAR信号通路有明显影响。
结论
2
电针可以通过调控PPARγ-CD36信号通路促进SCI后Hba-a1、Hbb-bt的清除,降低Caspase-3表达水平,减少细胞凋亡的发生,促进脊髓神经功能的恢复。
Objective
2
To establish a mouse model of spinal cord injury (SCI),and to investigate the effect of electroacupuncture(EA) intervention on cell apoptosis after acute SCI and its mechanism.
Methods
2
Female C57BL/6 mice were used to establish a model of SCI,and after successful modeling,the mice were randomly divided into SCI group,EA group,and Rosiglitazone group(R group);a sham-operation group(Sham group) was also established. After successful modeling,the mice in the EA group were given EA at bilateral Jiaji points and Zusanli once a day for 14 days,those in the R group were given intraperitoneal injection of the PPARγ agonist Rosiglitazone(5 mg/kg),and those in the Sham group and the SCI group were not given any specific treatment. BMS score was used to assess motor function;HE staining and immunofluorescence assay were used to observe pathological changes after SCI;RNA-Seq and TMT/iTRAQ techniques were used to identify the targets and mechanisms of EA;Western blot was used to measure the protein expression levels of PPARγ,CD36,Hba-a1,Hbb-bt,and caspase-3.
Results
2
Compared with the SCI group,the EA group and the R group had improvements in hindlimb motor function,tissue structure,and the number of surviving cells. The EA group and the R group had a significant reduction in the expression of caspase-3 and significant increases in the expression of PPARγ and CD36,and the EA group had significant reductions in the expression of Hba-a1 and Hbb-bt. In addition,RNA-Seq and TMT/iTRAQ techniques,significant analysis,Venn analysis,and dual-omics analysis identified Hba-a1 and Hbb-bt as the target genes of EA. The KEGG pathway enrichment analysis showed that EA had a significant effect on the PPAR signaling pathway.
Conclusion
2
By regulating the PPARγ-CD36 signaling pathway,EA can promote the clearance of Hba-a1 and Hbb-bt after SCI,reduce the expression level of caspase-3,alleviate cell apoptosis,and facilitate the recovery of spinal cord nerve function.
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