中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (13): 2030-2035.doi: 10.3969/j.issn.2095-4344.3513

• 干细胞因子及调控因子 stem cell factors and regulatory factors • 上一篇    下一篇

神经生长因子干预大鼠骨骼肌卫星细胞增殖及α-肌动蛋白的表达

颜  南,司晓凤,曾  亮,田  伟,单广东,熊礼硕,杨炜杰,王正东   

  1. 沈阳医学院,辽宁省沈阳市   110034
  • 收稿日期:2020-05-28 修回日期:2020-05-29 接受日期:2020-06-29 出版日期:2021-05-08 发布日期:2020-12-28
  • 通讯作者: 王正东,博士,副教授,沈阳医学院基础医学院解剖学教研室,辽宁省沈阳市 110034
  • 作者简介:颜南,女,1978年生,辽宁省营口市人,汉族,博士,副教授,主要从事神经损伤机制的研究。 司晓凤,女,1992年生,辽宁省瓦房店人,汉族,医师,主要从事冠心病的基础与临床研究。
  • 基金资助:
    辽宁省科学技术计划项目(2017225060),项目负责人:王正东

Nerve growth factor interferes with proliferation and alpha-actin expression of skeletal muscle satellite cells in rats

Yan Nan, Si Xiaofeng, Zeng Liang, Tian Wei, Shan Guangdong, Xiong Lishuo, Yang Weijie, Wang Zhengdong#br#

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  1. Shenyang Medical College, Shenyang 110034, Liaoning Province, China
  • Received:2020-05-28 Revised:2020-05-29 Accepted:2020-06-29 Online:2021-05-08 Published:2020-12-28
  • Contact: Wang Zhengdong, MD, Associate professor, Shenyang Medical College, Shenyang 110034, Liaoning Province, China
  • About author:Yan Nan, MD, Associate professor, Shenyang Medical College, Shenyang 110034, Liaoning Province, China Si Xiaofeng, Physician, Shenyang Medical College, Shenyang 110034, Liaoning Province, China
  • Supported by:
    the Science and Technology Program of Liaoning Province, No. 2017225060 (to WZD)

摘要:

文题释义:
骨骼肌卫星细胞:是一种未分化的细胞,来源于胚胎中胚层干细胞,位于骨骼肌细胞基底膜和浆膜肌纤维之间。正常情况下这些细胞处于静止状态,在外界刺激或应激状态下,骨骼肌卫星细胞可分化、增殖、融合形成多核细胞,生成新的肌纤维。骨骼肌卫星细胞在生长、修复等生理过程中起着至关重要的作用。
神经生长因子:是一种内源性神经营养素,参与哺乳动物神经元的发育、维持和再生。神经生长因子和脑源性神经营养因子是胚胎和成年运动神经元的存活、增殖和分化的关键,在运动神经元免受变性改变中发挥着重要保护作用。在体内外条件下的神经营养因子能够维持神经元的发育、存活和功能,对中枢神经系统的胆碱能神经元具有营养和分化活性。

背景:临床研究证实,向神经受损部位注射神经生长因子可改善骨骼肌的运动功能。
目的:观察神经生长因子对大鼠原代骨骼肌卫星细胞增殖的影响。
方法:采用组织块培养法培养大鼠原代骨骼肌卫星细胞。将第3代骨骼肌卫星细胞分3组培养:对照组加入培养液,低、高浓度组分别加入含10,20 U/mL神经生长因子的培养液。培养2,4,6 d时,倒置相差显微镜与苏木精-伊红染色观察细胞形态,免疫组化染色观察细胞α-肌动蛋白表达;培养1,2,3,4 d后,采用CCK-8法检测细胞增殖活性。
结果与结论:①倒置相差显微镜显示,随着培养时间的增加,各组骨骼肌卫星细胞数量逐渐增多,细胞形态由圆形逐渐变为细长的梭形、纺锤形或多角形,并逐渐融合并沿同一个方向排列,并且高浓度组细胞数量多于低浓度组、对照组(P < 0.05);②苏木精-伊红染色显示,各组骨骼肌卫星细胞轮廓清晰可见,密集分布,胞核较大且深染,组间无明显差异;③免疫组化染色显示,各组均可见α-肌动蛋白阳性表达,3组间α-肌动蛋白阳性表达吸光度值比较差异无显著性意义(P > 0.05);④CCK-8检测显示,低、高浓度组细胞活力高于对照组 (P=0.000);⑤结果表明,高、低浓度的神经生长因子均能促进骨骼肌卫星细胞的增殖,但对α-肌动蛋白表达无影响。
https://orcid.org/0000-0002-5462-4455(王正东) 

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, 骨骼肌, 卫星细胞, 因子, 神经生长因子, 细胞培养, 肌动蛋白, 细胞增殖

Abstract: BACKGROUND: Clinical studies have confirmed that the injection of nerve growth factor into the nerve damage site can improve the motor function of skeletal muscle.
OBJECTIVE: To observe the effect of nerve growth factor on the proliferation of primary skeletal muscle satellite cells in rats. 
METHODS:  The original generation of rat skeletal muscle satellite cells were cultivated by the tissue block method, and the third generation of skeletal muscle satellite cells were divided into three groups. The control group was added with culture medium; the low concentration group and the high concentration group were added with culture medium containing 10, 20 U/mL nerve growth factors, respectively. At 2, 4 and 6 days after culture, the cell morphology was observed by inverted phase contrast microscope and hematoxylin-eosin staining, and the expression of α-actin was observed by immunohistochemistry. At 1, 2, 3, and 4 days after culture, CCK-8 assay was used to detect the cell proliferation activity. 
RESULTS AND CONCLUSION: (1) Inverted phase contrast microscope displayed that with the increase of culture time, the number of skeletal muscle satellite cells in each group increased gradually, and the cell morphology gradually changed from round to fusiform, spindle or polygonal, and gradually fused and arranged along the same direction, and the number of cells in high concentration group was more than that in low concentration group and control group 
(P < 0.05). (2) Hematoxylin-eosin staining showed that the outline of satellite cells in skeletal muscle of each group was clear and densely distributed, and the nucleus was large and deeply stained; there was no significant difference among groups. (3) Immunohistochemical results showed that the expression of α-actin in skeletal muscle in each group was positive, but there was no statistical difference in the optical density of α-actin positive particles in each group (P > 0.05). (4) The CCK-8 assay results showed that cell viability of low and high concentration groups was higher than that of control group (P=0.000). (5) Above results confirm that high and low concentrations of nerve growth factors could promote the proliferation of skeletal muscle satellite cells, but had no effect on the expression of α-actin in skeletal muscle satellite cells. 

Key words: bone, skeletal muscle, satellite cell, factor, nerve growth factor, cell culture, actin, cell proliferation

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