中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (7): 1050-1055.doi: 10.3969/j.issn.2095-4344.2171

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

血小板源生长因子BB可促进骨骼肌成肌细胞增殖、分化与迁移

李  偲1,赵  婷1,谭  戈1,郑雨林1,张若男1,吴  艳1,2,唐俊明1,2   

  1. 湖北医药学院,1胚胎干细胞研究湖北省重点实验室,2基础医学院生理学教研室,湖北省十堰市   442000
  • 收稿日期:2019-12-06 修回日期:2019-12-10 接受日期:2020-01-10 出版日期:2021-03-08 发布日期:2020-12-08
  • 通讯作者: 吴艳,博士,副教授,湖北医药学院胚胎干细胞研究湖北省重点实验室,湖北省十堰市 442000;湖北医药学院基础医学院生理学教研室,湖北省十堰市 442000
  • 作者简介:李偲,女,1999年生,湖北省武穴市人,汉族,湖北医药学院本科在读,主要从事干细胞生物学方面的研究。
  • 基金资助:
    湖北省教育厅科研计划项目(B2017488)

Platelet-derived growth factor-BB promotes proliferation, differentiation and migration of skeletal muscle myoblast

Li Cai1, Zhao Ting1, Tan Ge1, Zheng Yulin1, Zhang Ruonan1, Wu Yan1, 2, Tang Junming1, 2   

  1. 1Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, Hubei Province, China; 2Department of Physiology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, Hubei Province, China
  • Received:2019-12-06 Revised:2019-12-10 Accepted:2020-01-10 Online:2021-03-08 Published:2020-12-08
  • Contact: Wu Yan, MD, Associate professor, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, Hubei Province, China; Department of Physiology, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, Hubei Province, China
  • About author:Li Cai, Hubei Key Laboratory of Embryonic Stem Cell Research, Hubei University of Medicine, Shiyan 442000, Hubei Province, China
  • Supported by:
    the Scientific Research Project of Hubei Provincial Education Department, No. B2017488

摘要:

文题释义:
骨骼肌成肌细胞:此次研究所采用的是小鼠C2C12细胞,是成体干细胞中的一种。当骨骼肌受损时,肌卫星细胞首先被激活形成骨骼肌成肌细胞,而骨骼肌成肌细胞将进一步分化融合而形成多核肌管和肌纤维,以完成肌损伤修复过程。但正常情况下,骨骼肌成肌细胞分化融合的过程缓慢并不完全,易形成瘢痕组织影响后期的生活及运动。因此,找到合适的干预措施以提高骨骼肌成肌细胞的分化及融合具有重要的临床意义。
血小板源生长因子BB:是体内一种重要的促有丝分裂剂,可以刺激多种组织细胞增殖、分化及迁移,在各种损伤后组织修复过程中可发挥重要作用。但血小板源生长因子BB对骨骼肌成肌细胞增殖、分化及迁移过程的影响,目前研究较少。

背景:骨骼肌损伤后,骨骼肌成肌细胞分化融合形成多核肌管和肌纤维完成肌损伤修复,但该过程修复缓慢且不完全。血小板源生长因子BB可以刺激多种组织细胞增殖、分化及迁移,在各种损伤后组织修复过程中发挥了重要作用。
目的:探讨不同浓度血小板源生长因子BB对骨骼肌成肌细胞增殖、分化及迁移的影响及作用机制。
方法:培养小鼠骨骼肌成肌细胞(C2C12细胞),分别给予血小板源生长因子BB 0,5,10,20,40 μg/L及血小板源生长因子受体抑制剂伊马替尼处理。采用免疫细胞化学法及Western-blot法检测C2C12细胞中血小板源生长因子受体表达情况;分别培养1,2,3,4,5 d后,采用 CCK8法检测细胞增殖情况;给予诱导分化培养4 d,采用光学显微镜观察各组肌管的形成情况,通过免疫荧光化学法和Western-blot法观察各组肌管中肌球蛋白重链及MyoG基因的表达情况;培养48 h后,采用Transwell法检测细胞迁移情况。
结果与结论:①免疫荧光化学及Western-blot均提示C2C12细胞中可检测到血小板源生长因子受体表达,半定量后统计学分析显示不同血小板源生长因子BB质量浓度组间血小板源生长因子受体表达量差异无显著性意义(P > 0.05);②CCK8检测结果显示,与对照组(血小板源生长因子BB 0 μg/L组)比较,不同质量浓度血小板源生长因子BB组C2C12细胞增殖无明显改变;③免疫荧光化学法检测结果显示,与对照组相比,血小板源生长因子BB处理组肌球蛋白重链阳性细胞数增多,计数平均每个显微镜视野下肌管形成数目提示血小板源生长因子BB质量浓度为40 μg/L时成熟肌管形成数目最多,达(27.00±0.76)个/视野,且该组中MyoG表达数量增多最为明显,与对照组相比差异有显著性意义(P < 0.05);④Transwell结果显示,与对照组相比较,不同质量浓度血小板源生长因子BB组C2C12细胞的迁移数量均增加,其中以40 μg/L组迁移数目最高达144.00±13.03 (P < 0.05);⑤提示血小板源生长因子BB能够促进C2C12细胞迁移、分化及其肌管形成,且促分化机制与其增强与血小板源生长因子受体结合、从而提高分化相关基因MyoG的表达有关。
https://orcid.org/0000-0001-8571-7227(李偲) 

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: 骨骼肌, 成肌细胞, 血小板源生长因子BB, 细胞增殖, 细胞分化, 细胞迁移, 蛋白, 肌球蛋白重链

Abstract: BACKGROUND: Skeletal muscle myoblasts differentiate and fuse to form polynuclear muscle tubes and muscle fibers to complete the repair of muscle injury when skeletal muscles were injured. However, the repair process is slow and incomplete. Platelet-derived growth factor-BB can stimulate the proliferation, differentiation and migration of a variety of tissue cells, and plays an important role in the process of tissue repair after various injuries.
OBJECTIVE: To explore the effects of different concentrations of platelet-derived growth factor-BB on proliferation, differentiation and migration of skeletal muscle myoblast C2C12 cells and the action mechanism.
METHODS:  The mouse skeletal muscle myoblast C2C12 cells were cultured with platelet-derived growth factor-BB 0, 5, 10, 20 and 40 μg/L and platelet-derived growth factor receptor inhibitor imatinib. The expression of platelet-derived growth factor receptor in C2C12 cells was detected by immunocytochemistry and western blot assay. After 1, 2, 3, 4, and 5 days of culture, CCK8 method was used to detect cell proliferation. After 4 days of induction and differentiation culture, the formation of myotubes in each group was observed by light microscope. The expression of myosin heavy chain and MyoG Gene was observed by immunofluorescence and western blot assay. After 48 hours of culture, Transwell method was used to detect cell migration. 
RESULTS AND CONCLUSION: (1) Immunofluorescence chemistry and western blot assay indicated that platelet-derived growth factor receptor expression could be detected in C2C12 cells, and semi-quantitative statistical analysis showed no significant difference in platelet-derived growth factor receptor expression between groups with different platelet-derived growth factor-BB concentrations (P > 0.05). (2) CCK8 assay demonstrated that the proliferation of C2C12 cells showed no significant change in platelet-derived growth factor-BB groups compared with the control group (platelet-derived growth factor-BB 0 μg/L group). (3) Immunofluorescence chemistry showed that compared with control group, number of myosin heavy chain positive cells increased in platelet-derived growth factor-BB groups; 40 μg/L platelet-derived growth factor-BB concentration got the highest; the mature muscle tubes up to (27.00±0.76) per field of vision, and MyoG expression populations was most obviously compared with the control group (P < 0.05). (4) Transwell results showed that compared with the control group, the migration number of C2C12 cells in the platelet-derived growth factor-BB group increased, and the migration number in the 40 μg/L group was up to 144.00±13.03 (P < 0.05). (5) It is concluded that platelet-derived growth factor-BB promoted the migration, differentiation and myotube formation of C2C12 cells, and the pro-differentiation mechanism is related to its enhanced binding with platelet-derived growth factor receptor, so as to improve the expression of differentiation related gene MyoG. 

Key words: skeletal muscle, myoblasts, platelet-derived growth factor-BB, cell proliferation, cell differentiation, cell migration, protein, myosin heavy chain

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