中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (25): 5403-5413.doi: 10.12307/2025.098

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

卷曲螺旋结构域蛋白2通过促进线粒体自噬抑制帕金森病SH-SY5Y细胞凋亡

祝柳慧1,2,张歆悦1,朱洲海2,杨兴隆1,管  莹2,刘  彬1,2   

  1. 1昆明医科大学第一附属医院神经内科,云南省昆明市   650032;2烟草与健康联合研究院,云南省昆明市   650106
  • 收稿日期:2024-03-06 接受日期:2024-04-28 出版日期:2025-09-08 发布日期:2024-12-26
  • 通讯作者: 刘彬,硕士,主任医师,硕士生导师,昆明医科大学第一附属医院神经内科,云南省昆明市 650032;烟草与健康联合研究院,云南省昆明市 650106;共同通讯作者:管莹,博士,副研究员,烟草与健康联合研究院,云南省昆明市 650106
  • 作者简介:祝柳慧,女,1998年生,云南省文山州人,汉族,昆明医科大学在读硕士,主要从事神经退行性疾病方面的研究。
  • 基金资助:
    云南省应用基础项目(202101AY070001-115),项目负责人:刘彬;烟草与健康联合研究院开放基金(2021539200340039),项目负责人:杨兴隆;云南省教育厅科学研究基金项目(2024Y226),项目负责人:祝柳慧

Coiled-coil-helix-coiled-coil-helix domain-containing 2 inhibits apoptosis of Parkinson’ s disease SH-SY5Y cells by promoting mitochondrial autophagy

Zhu Liuhui1, 2, Zhang Xinyue1, Zhu Zhouhai2, Yang Xinglong1, Guan Ying2, Liu Bin1, 2   

  1. 1Department of Neurology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China; 2Joint Institute of Smoking and Health, Kunming 650106, Yunnan Province, China
  • Received:2024-03-06 Accepted:2024-04-28 Online:2025-09-08 Published:2024-12-26
  • Contact: Liu Bin, Master, Chief physician, Master’s supervisor, Department of Neurology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China; Joint Institute of Smoking and Health, Kunming 650106, Yunnan Province, China; Co-corresponding author: Guan Ying, PhD, Associate researcher, Joint Institute of Smoking and Health, Kunming 650106, Yunnan Province, China
  • About author:Zhu Liuhui, Master candidate, Department of Neurology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China; Joint Institute of Smoking and Health, Kunming 650106, Yunnan Province, China
  • Supported by:
    Applied Basic Research Foundation of Yunnan Province, No. 202101AY070001-115 (to LB); Open Fund of Joint Institute of Smoking and Health, No. 2021539200340039 (to YXL); Yunnan Provincial Education Department Scientific Research Fund Project, No. 2024Y226 (to ZLH)

摘要:

文题释义:

卷曲螺旋结构域蛋白2:属于卷曲螺旋功能结构域蛋白质家族,与包括帕金森病在内的多种神经退行性疾病相关,对细胞的正常功能维持起重要作用,多数在线粒体中参与调解线粒体代谢并调节呼吸链成分表达,而在应激情况下其转位至细胞核中调控自身以及细胞色素氧化酶等基因的转录。
线粒体自噬:是细胞通过自噬机制选择性清除功能失调或者多余线粒体的一种高度保守的细胞进程,在活性氧应激、营养缺乏、细胞衰老等情况下细胞内线粒体出现去极化损伤,自噬体识别并包裹受损线粒体再与溶酶体结合,促进线粒体内容物的降解,该过程能调整线粒体数目并维持细胞能量代谢的稳定。

摘要
背景:卷曲螺旋结构域蛋白2(coiled-coil-helix-coiled-coil-helix domain-containing 2,CHCHD2)能否调控PINK1/Parkin介导的线粒体自噬在帕金森病中发挥神经保护作用尚未可知。
目的:探讨CHCHD2在6-羟基多巴胺诱导的帕金森病细胞模型中对PINK1/Parkin信号通路介导的线粒体自噬发挥的作用及机制。
方法:利用重组质粒转染技术过表达或敲低CHCHD2,用6-羟基多巴胺构建SH-SY5Y细胞帕金森病模型后分对照组、模型组、过表达阴性对照+6-羟基多巴胺组、敲低阴性对照+6-羟基多巴胺组、过表达CHCHD2+6-羟基多巴胺组和敲低CHCHD2+6-羟基多巴胺组。Western blot及RT-qPCR检测CHCHD2的表达;Western blot 检测LC3Ⅰ/Ⅱ、p62、MFN1、COXⅣ、DRP1、PINK1、Parkin、TIM23、Bax、Bcl-2及cleaved-caspase3蛋白表达;CCK-8、JC-1和活性氧试剂盒检测细胞活性、线粒体膜电位和活性氧水平,单丹磺酰尸胺染色观察细胞自噬情况,透射电镜观察自噬溶酶体。
结果与结论:①与对照组相比,模型组细胞活性、线粒体膜电位及CHCHD2、PINK1、Parkin蛋白表达降低,活性氧水平、凋亡水平及LC3Ⅰ/Ⅱ、p62蛋白表达升高(P < 0.05),并观察到自噬溶酶体的存在;②与模型组相比,过表达CHCHD2能降低细胞活性氧水平,升高线粒体膜电位及PINK1、Parkin和MFN1蛋白表达水平,并观察到线粒体自噬溶酶体增多,而敲低CHCHD2后有与上述相反的作用,并伴有COXⅣ、TIM23和p-DRP1蛋白表达的升高(P < 0.05);③与模型组相比,过表达CHCHD2能减少细胞凋亡,上调Bcl-2并下调Bax及cleaved-caspase3蛋白的表达,而敲低CHCHD2后有与上述相反的作用 (P < 0.05);④结果提示,CHCHD2在6-羟基多巴胺诱导的帕金森病细胞模型中可以通过促进PINK1/Parkin介导的线粒体自噬改善线粒体功能从而减轻细胞凋亡发挥神经保护作用。

https://orcid.org/0009-0006-2964-6755 (祝柳慧) 


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 帕金森病, 卷曲螺旋结构域蛋白2, PINK1, Parkin, 线粒体自噬, 线粒体功能, 细胞凋亡, 6-羟基多巴胺, SH-SY5Y细胞

Abstract: BACKGROUND: Whether coiled-coil-helix-coiled-coil-helix domain-containing 2 (CHCHD2) can regulate the neuroprotective role of PINK1/Parkin-mediated mitochondrial autophagy in Parkinson’s disease remains unknown.
OBJECTIVE: To explore the role and mechanisms of CHCHD2 in the 6-hydroxydopamine-induced Parkinson’s disease cell model in mediating the PINK1/Parkin signaling pathway and its involvement in mitochondrial autophagy.
METHODS: Utilizing recombinant plasmid transfection technology to overexpress or knockdown CHCHD2, SH-SY5Y cells were constructed with a Parkinson’s disease model using 6-hydroxydopamine, and divided into control group, model group, overexpression negative control+6-hydroxydopamine group, knockdown negative control+6-hydroxydopamine group, overexpression CHCHD2+6-hydroxydopamine group, and knockdown CHCHD2+6-hydroxydopamine group. Western blot assay and RT-qPCR were used to detect CHCHD2 expression. Western blot assay was utilized to detect the protein expression of LC3I/II, p62, MFN1, COXIV, DRP1, PINK1, Parkin, TIM23, Bax, Bcl-2, and cleaved-caspase 3. CCK-8 assay, JC-1, and reactive oxygen species assay kits were used to measure cell viability, mitochondrial membrane potential, and reactive oxygen levels. Monodansylcadaverine staining was used to observe cell autophagy. Transmission electron microscopy was used to observe autophagolysosomes.
RESULTS AND CONCLUSION: (1) Compared with the control group, cell activity, mitochondrial membrane potential, and the protein expression levels of CHCHD2, PINK1, and Parkin were decreased, and the levels of reactive oxygen species, apoptosis, and LC3I/II and p62 proteins were increased (P < 0.05), and the presence of autophagic lysosomes was observed in the model group. (2) Compared with the model group, overexpression of CHCHD2 could reduce the level of cellular reactive oxygen species, increase the mitochondrial membrane potential, and the expression levels of PINK1, Parkin, and MFN1 proteins, and observed an increase in mitochondrial autolysosomes, and the knockdown of CHCHD2 had the opposite effect with the increase of COXIV, TIM23 and p-DRP1 protein expression (P < 0.05). (3) Compared with the model group, overexpression of CHCHD2 reduced apoptosis, up-regulated Bcl-2, and down-regulated the expression of Bax and cleaved-caspase3 proteins, while knockdown of CHCHD2 had the opposite effect (P < 0.05). (4) The results suggest that CHCHD2 can play a neuroprotective role by promoting PINK1/Parkin-mediated mitochondrial autophagy, improving mitochondrial function, and alleviating apoptosis in 6-hydroxydopamine-induced Parkinson’s disease cell models.

Key words: Parkinson’s disease, coiled-coil-helix-coiled-coil-helix domain-containing 2, PINK1, Parkin, mitochondrial autophagy, mitochondrial function, cell apoptosis, 6-hydroxydopamine, SH-SY5Y cell

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