应力加载对体外培养C2C12细胞自身抗原及TLR3的影响

中国临床解剖学杂志 ›› 2013, Vol. 31 ›› Issue (6): 688-691.

应力加载对体外培养C2C12细胞自身抗原及TLR3的影响

冯利强^1,2，　陈荣¹，　刘幸卉¹，　黄维一¹，　曾慧君¹，　廖华¹

1.南方医科大学解剖教研室，广东省组织构建与检测重点实验室，广州 510515；
2.宁夏医科大学解剖教研室，银川 750004

收稿日期:2013-09-15 出版日期:2013-11-25 发布日期:2013-12-16
通讯作者: 廖华，教授，博士生导师，Tel:(020)62789092，E-mail: hua-liao@163.com E-mail:279748103@qq.com
作者简介:冯利强（1977-），男，讲师，在读硕士，主要从事骨骼肌损伤研究
基金资助:
国家自然科学基金（81171724），(81371924)；广东省科技计划项目(2012B031800146)

The effect of mechanical-stretch on the expression of TLR3 and myositis autoantigens in cultured C2C12 myoblasts

FENG Li-qiang ^1,2, CHEN Rong¹, LIU Xing-hui¹, HUANG Wei-yi¹, ZENG Hui-jun¹, LIAO Hua¹

1.Department of Anatomy, Southern Medical University; Key Laboratory of Construction and Detecting Organization, Guangdong Province, Guangzhou 510515; 2. Department of Anatomy,Ningxia Medical University, Yinchuan 750004

Received:2013-09-15 Online:2013-11-25 Published:2013-12-16

摘要/Abstract

摘要：

目的　探讨机械应力加载是否干扰体外培养C2C12成肌细胞自身抗原及TLR3的转录表达。方法　对生长于BioFlex柔性基底膜表面的C2C12细胞施加不同频率的拉伸加载，流式细胞术分析细胞增殖情况。Real-time RT-PCR检测并比较分析应力加载前、后骨骼肌自身抗原(HRS、Mi-2、U1-70、DNA-PKcs）、TLR3的mRNAs表达差异。结果　0.25 Hz、10%幅度、2 h/d的拉伸条件能加速C2C12细胞进入细胞周期。 2 d和4 d拉伸组DPI较对照组提高（P＜0.05），尤以2d拉伸组细胞增殖最为显著。拉伸2 d时，C2C12细胞内HRS、 Mi-2、U1-70、DNA-PKcs以及TLR3的mRNA水平均显著低于同一培养时间的对照组（P＜0.05）。结论　机械应力刺激信号可能参与下调与骨骼肌组织炎症相关的免疫调节分子。

关键词: 应力加载, C2C12, 自身抗原, TLR3

Abstract:

Objective　To investigate the effect of mechanical-stretch on the expression of myositis autoantigens and proinflammatory TLR3 in cultured C2C12 myoblasts.　Methods　C2C12 cells cultured on the surface of BioFlex flexible basement membrane in vitro were subjected to cyclic strain. The proliferation of C2C12 cells was detected usingflow cytometry. The mRNA expression of myositis autoantigens (HRS, Mi-2, DNA-PKcs, U1-70) and TLR3 were analyzed through Real-time RT-PCR.　Results　Cyclic echanical-stretch about 2d stimulated C2C12 cell cycling and early down-regulation of mRNA levels of TLR3 and Mi-2, HRS, DNA-PKcs and U1-70 under the strain of 10% lengthening, 0.25Hz frequencyfor 2h per day(P<0.05).　Conclusions　Mechanical stretch reduces expression of muscle autoantigens and of pro-inflammatory TLR3, which may provide new insight to understand howresistance exercise reduce the symptoms associated with myositis.

Key words: Stretch, C2C12, Autoantigen, TLR3

中图分类号:

R322.74

冯利强, 陈荣, 刘幸卉, 黄维一, 曾慧君, 廖华. 应力加载对体外培养C2C12细胞自身抗原及TLR3的影响[J]. 中国临床解剖学杂志, 2013, 31(6): 688-691.

FENG Li-Jiang, CHEN Rong, LIU Nie-Hui, HUANG Wei-Yi, CENG Hui-Jun, LIAO Hua. The effect of mechanical-stretch on the expression of TLR3 and myositis autoantigens in cultured C2C12 myoblasts[J]. Chinese Journal Of Clinical Anatomy, 2013, 31(6): 688-691.

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