中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (33): 5341-5346.doi: 10.3969/j.issn.2095-4344.1816

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

电针调控miRNA206/HDAC4轴促进损伤多裂肌修复过程中成肌细胞分化的机制

刘  通1,于佳妮2,邹德辉3,邝伟川1,王小寅1,文  希1,江  烨1,邱晓佳1,曾  遥1,刘  悦1   

  1. 1广东省第二中医院针灸康复科,广东省广州市  510095;2广东省中医院康复科,广东省广州市  510120;3华北理工大学中医学院,河北省唐山市  063210
  • 修回日期:2019-05-20 出版日期:2019-11-28 发布日期:2019-11-28
  • 通讯作者: 刘悦,硕士,主任中医师,硕士生导师,广东省第二中医院针灸康复科,广东省广州市 510095; 于佳妮,博士,主治中医师,广东省中医院康复科,广东省广州市 510120
  • 作者简介:刘通,男,1987年生,山东省莱芜市人,汉族,主治中医师,2016年北京中医药大学毕业,博士,主要从事针灸临床机理研究。
  • 基金资助:

    国家自然基金青年基金项目(81704179),项目负责人:刘通

Regulation of miRNA206/histone deacetylase 4 by electroacupuncture promotes myogenic differentiation during multifidus muscle repair 

Liu Tong1, Yu Jiani2, Zou Dehui3, Kuang Weichuan1, Wang Xiaoyin1, Wen Xi1, Jiang Ye1, Qiu Xiaojia1, Zeng Yao1, Liu Yue1   

  1. 1Department of Acupuncture and Rehabilitation, Guangdong Second Hospital of Traditional Chinese Medicine, Guangzhou 510095, Guangdong Province, China; 2Department of Rehabilitation, Guangdong Hospital of Traditional Chinese Medicine, Guangzhou 510120, Guangdong Province, China; 3School of Traditional Chinese Medicine, North China University of Science and Technology, Tangshan 063210, Hebei Province, China
  • Revised:2019-05-20 Online:2019-11-28 Published:2019-11-28
  • Contact: Liu Yue, Master, Chief physician, Master’s supervisor, Department of Acupuncture and Rehabilitation, Guangdong Second Hospital of Traditional Chinese Medicine, Guangzhou 510095, Guangdong Province, China. Yu Jiani, PhD, Attending physician, Department of Rehabilitation, Guangdong Hospital of Traditional Chinese Medicine, Guangzhou 510120, Guangdong Province, China
  • About author:Liu Tong, PhD, Chief physician, Department of Acupuncture and Rehabilitation, Guangdong Second Hospital of Traditional Chinese Medicine, Guangzhou 510095, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China (Youth Project), No. 81704179 (to LT)

摘要:

文章快速阅读:

文题释义:
多裂肌:
多裂肌位于脊柱最内侧,是附着面积最大的椎旁肌,由多束组成,起于腰椎椎板、棘突,止于骶骨背面,在腰部比较发达,对维持腰椎的稳定性尤为重要。
成肌分化:成肌分化是肌肉干细胞——肌卫星细胞的特性之一,当肌卫星细胞增殖到一定阶段后,即开始出现分化倾向,为后期的成肌融合作准备。

 

摘要
背景:
作者前期的动物及细胞实验研究已证明电针可提高损伤腰多裂肌中Pax7和成肌分化抗原的表达,促进多裂肌的损伤修复。亦有研究证明miRNA206促进成肌分化主要是通过抑制组蛋白去乙酰化酶4实现的。
目的:观察电针对布比卡因致大鼠腰多裂肌损伤修复过程中miRNA206/组蛋白去乙酰化酶4表达的影响。
方法:实验方案经广东省第二中医院动物实验伦理委员会批准(批准号为048604)。将30只雄性SD大鼠随机分为对照组、模型组、电针组,每组10只。模型组、电针组采用0.5%布比卡因肌内注射复制大鼠多裂肌损伤模型;对照组予注射等量生理盐水。对照组与模型组不进行针刺干预,电针组予针刺双侧委中穴、肾俞穴,针刺后连接电针,波形选用疏密波,电针频率采用2 Hz/10 Hz,电流强度选择1 mA,持续治疗20 min,每天治疗1次,共治疗7 d。干预7 d后,通过苏木精-伊红染色观察损伤部位多裂肌形态学变化,采用qRT-PCR检测多裂肌中miRNA206的表达量,Western-blot检测多裂肌中成肌分化抗原、Myogenin及组蛋白去乙酰化酶4蛋白的表达。
结果与结论:①苏木精-伊红染色显示,7 d后,对照组可见视野中骨骼肌纤维大部分排列整齐,无明显破坏及巨噬细胞浸润;模型组视野内可见大量肌纤维被破坏,但出现部分肌纤维修复,巨噬细胞数量仍较多;电针组新生肌纤维较多,巨噬细胞较模型组减少;②Western-blot结果显示,7 d后,模型组成肌分化抗原、Myogenin、组蛋白去乙酰化酶4蛋白表达均较对照组升高(P < 0.05或P < 0.01);电针组成肌分化抗原、Myogenin蛋白表达较模型组升高(P < 0.01),组蛋白去乙酰化酶4蛋白较模型组降低(P < 0.01);③qRT-PCR结果显示,7 d后,模型组miRNA206表达高于对照组(P < 0.01),电针组miRNA206表达高于模型组(P < 0.05);④结果说明,电针可促进多裂肌损伤后成肌分化,其作用可能是通过提高miRNA206表达抑制组蛋白去乙酰化酶4活性实现的。


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
ORCID: 0000-0002-5185-2188(刘通)

关键词: 电针, 多裂肌, 修复, 形态学, 成肌分化, miRNA206, 组蛋白去乙酰化酶4, 成肌分化抗原, Myogenin

Abstract:

BACKGROUND: Our preliminary studies on animal and cell experiments have shown that electroacupuncture can improve the expression of Pax7 and myogenic differentiation antigen in injured multifidus muscle and facilitate the repair of multifidus muscle injury. Studies have also shown that miRNA206 promotes myogenic differentiation mainly through inhibition of histone deacetylase 4.
OBJECTIVE: To explore the effect of electroacupuncture on miRNA206/histone deacetylase 4 during muscle regeneration after bupivacaine-induced multifidus muscle injury in rats.
METHODS: The study protocol was approved by the Animal Ethics Committee of Guangdong Second Hospital of Traditional Chinese Medicine with the approval No. 048604. Thirty male Sprague Dawley rats were randomly divided into control group, model group and electroacupuncture group (n=10/group). Rat models of multifidus muscle injury were established by injecting 0.5% bupivacaine hydrochloride in model and electroacupuncture groups, while normal saline injection was only given in control group. No acupuncture intervention was given in the control and model groups. Electroacupuncture at bilateral Shenshu (BL23) and Weizhong (BL40) acupoints was given in the electroacupuncture group. Needles were then stimulated electrically using a Han’s Acupoint Nerve Stimulator for 20 minutes daily for 7 continuous days, with a density wave, frequency of 2 Hz/10 Hz and continuous current of 1 mA. At 7 days of intervention, morphological changes of the multifidus muscle was observed using hematoxylin-eosin staining, and qRT-PCR was used to detect miRNA206 expression, and western blot was used to observe the expression of myogenic differentiation antigen, Myogenin and histone deacetylase 4 in the multifidus muscle.
RESULTS AND CONCLUSION: (1) Hematoxylin-eosin staining indicated that, most of the skeletal muscle fibers in the control group were neatly arranged at 7 days of treatment, with no obvious damage and macrophage infiltration. The muscle fibers in the model group were largely damaged, but partially repaired and there were still a lot of macrophages. More newborn muscle fibers and fewer macrophages could be seen in the electroacupuncture group compared to the model group. (2) Western blot results indicated that the expression of myogenic differentiation antigen, Myogenin and histone deacetylase 4 proteins was significantly increased in the model group relative to the control group after 7 days of treatment (P < 0.05 or P < 0.01). Compared with the model group, the expression of myogenic differentiation antigen and Myogenin increased significantly in the electroaupuncture group (P < 0.01), but the expression of histone deacetylase 4 decreased significantly (P < 0.01). (3) qRT-PCR results indicated that the expression of miRNA206 in the model group was significantly higher than that in the control group (P < 0.01) and lower than that in the electroacupucture group after 7 days of treatment (P < 0.05). Therefore, electroacupuncture could accelerate myogenic differentiation after multifidus muscle injury, which may be achieved by improving the expression of miRNA206 to inhibit activity of histone deacetylase 4.

Key words: electroacupuncture, multifidus muscle, repair, morphology, myogenic differentiation, miRNA206, histone deacetylase 4, myogenic differentiation antigen, Myogenin

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