中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (24): 3790-3795.doi: 10.3969/j.issn.2095-4344.2017.24.004

• 软骨组织构建 cartilage tissue construction • 上一篇    下一篇

电针延缓骨关节炎软骨退变:基于Ras-Raf-MEK1/2-ERK1/2信号通路的认识

付长龙1,陈后煌1,朱定钰2,吴追乐1,徐 欣2,郑春松3,李 俐2,刘献祥1,李西海1,吴明霞2   

  1. 1福建中医药大学中西医结合研究院,福建省福州市 350122;2福建中医药大学附属第二人民医院,福建省福州市 350003;3福建省中西医结合老年性疾病重点实验室,福建省福州市 350122
  • 修回日期:2017-06-21 出版日期:2017-08-28 发布日期:2017-08-30
  • 通讯作者: 吴明霞,博士,主任医师,教授,博士生导师,福建中医药大学附属第二人民医院,福建省福州市 350003;并列通讯作者:李西海,博士,研究员,硕士生导师,福建中医药大学中西医结合研究院,福建省福州市 350122
  • 作者简介:付长龙,男,1987年生,山东省济宁市人,汉族,福建中医药大学在读博士,主要从事中西医结合骨关节炎研究。
  • 基金资助:

    国家自然科学基金(81373719)

Electroacupuncture delays articular cartilage degeneration in osteoarthritis via Ras-Raf-MEK1/2-ERK1/2 signaling pathway

Fu Chang-long1, Chen Hou-huang1, Zhu Ding-yu2, Wu Zhui-le1, Xu Xin2, Zheng Chun-song3, Li Li2, Liu Xian-xiang1,Li Xi-hai1, Wu Ming-xia2   

  1. 1Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, Fujian Province, China; 2the Second People’s Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou 350003, Fujian Province, China; 3the Key Laboratory of Senile Diseases of Integrative Medicine in Fujian Province, Fuzhou 350122, Fujian Province, China
  • Revised:2017-06-21 Online:2017-08-28 Published:2017-08-30
  • Contact: Wu Ming-xia, M.D., Chief physician, Doctoral supervisor, the Second People’s Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou 350003, Fujian Province, China; Li Xi-hai, M.D., Researcher, Master’s supervisor, Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, Fujian Province, China
  • About author:Fu Chang-long, Studying for doctorate, Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, Fujian Province, China
  • Supported by:

     the National Natural Science Foundation of China, No. 81373719

摘要:

文章快速阅读:

文题释义:
信号通路:
是指能将细胞外的分子信号经细胞膜传入细胞内发挥效应的一系列酶促反应通路。这些细胞外的分子信号(称为配体,ligand)包括激素、生长因子、细胞因子、神经递质以及其他小分子化合物等。当配体特异性地结合到细胞膜或细胞内的受体(receptor)后,在细胞内的信号发生了一系列的变化。
Ras-Raf-MEK1/2-ERK1/2信号通路:在细胞因子受体刺激下,RAS可经激活转化为活化型RAS,而与GTP结合的活化的Ras可激活下游靶标Raf,然后使MEK的2个丝氨酸残基磷酸化,并活化其唯一的底物ERK1/2,而活化的ERK形成二聚体,转入细胞核,以此参与调控软骨细胞增殖、分化、炎症反应以及细胞凋亡等。

 

摘要
背景:
前期研究发现,电针可通过影响骨性关节炎软骨细胞JAK-STAT信号通路,并有效增加转化生长因子β1含量及促进关节软骨中STAT3、Smad3、LepR mRNA的表达以延缓关节软骨退变,同时电针后血清能有效抑制凋亡调控基因p38、Fas mRNA,并降低MAPK信号通路的表达,从而抑制软骨细胞凋亡。
目的:从Ras-Raf-MEK1/2-ERK1/2信号通路探讨电针对骨关节炎大鼠软骨退变的影响。 
方法:选取2月龄健康雄性SD大鼠120只,随机抽取30只为正常组,其余90只大鼠用4%木瓜蛋白酶法进行双侧关节腔注射造模后再用抽签法随机分为3组,即造模组30只、电针15 min组30只、电针30 min组30只。于造模后2周开始给予电针治疗,电针15 min组与电针30 min组均为5次/周,连续干预12周后,苏木精-伊红染色观察软骨形态,ELISA检测滑膜组织中白细胞介素1β表达,Western Blot 检测Ras、Raf、MEK1/2、ERK1/2、C-MYC、C-FOS、C-JUN蛋白含量表达。

结果与结论:①经苏木精-伊红染色,模型组关节软骨表面局部粗糙不平,软骨层变薄,4层结构缺失,且潮线不完整,电针15 min组和电针30 min组的软骨表层基本完整,软骨层次清晰可辨,潮线相对完整;②ELISA结果显示,模型组白细胞介素1β表达含量明显高于正常组(P < 0.01),电针15 min组与电针30 min组的白细胞介素1β含量表达均低于模型组(P < 0.01);③Western Blot结果显示,与正常组比较,模型组的Ras、Raf、MEK1/2、ERK1/2、C-MYC、C-FOS、C-JUN均表达升高。与模型组比较,电针15 min组与电针30 min组的Ras、Raf、MEK1/2、C-MYC、C-FOS、C-JUN蛋白含量表达显著降低(P < 0.01,P < 0.05),同时亦降低ERK1/2表达;④结果提示,电针可通过调控Ras-Raf-MEK1/2-ERK1/2信号通路的相关指标,下调关节软骨Ras、Raf、MEK1/2、ERK1/2、C-MYC、C-FOS、C-JUN蛋白表达,并降低滑膜组织中白细胞介素1β含量表达,从而延缓骨关节炎软骨退变。

 

关键词: 组织构建, 软骨组织工程, 软骨, 滑膜, 骨关节炎, 电针, Ras-Raf-MEK1/2-ERK1/2信号通路, 国家自然科学基金

Abstract:

BACKGROUND: Previous studies have found that electroacupuncture can delay articular cartilage degeneration mediated by JAK-STAT signaling pathway through upregulating the expression level of transforming growth factor β1 as well as mRNA expression levels of STAT3, Smad3 and LepR. In the meanwhile, electroacupuncture can inhibit the mRNA expression of p38 and Fas mRNA mediated by MAPK signaling pathways, further inhibiting the apoptosis of chondrocytes.

OBJECTIVE: To explore the effect of electroacupuncture on the degeneration of articular cartilage in rats with knee osteoarthritis based on Ras-Raf-MEK1/2-ERK1/2 signaling pathway.
METHODS: 120 male healthy Sprague-Dawley rats aged 2 months olds were selected and randomly divided into normal, model, 15-minite electroacupuncture and 30-minute electroacupuncture groups (n=30 per group). The rats in the latter three groups received the intra-articular injection of 4% papain bilaterally, and the remaining rats received no intervention. At 2 weeks after modeling, the latter two groups were respectively given 15- and 30-minute electroacupuncture, five times weekly for consecutive 12 weeks. The morphology of the cartilage was observed by hematoxylin-eosin staining, the expression level of interleukin-1β in the synovium was detected by ELISA assay, and the protein expression levels of Ras, Raf, MEK1/2, ERK1/2, C-MYC, C-FOS, and C-JUN were detected by western blot analysis.
RESULTS AND CONCLUSION: Hematoxylin-eosin staining showed that: in the model group, the cartilage surface was rough, the cartilage layer became thinner, and the cartilage structure was damaged with incomplete tidal line; in the 15- and 30-minute electroacupuncture groups, the cartilage structure was complete with clear layers and complete tidal line. ELISA showed that the expression level of interleukin-1β in the model group was significantly higher than that in the normal group (P < 0.01), and the level in the 15- and 30-minute electroacupuncture groups was significantly lower than that in the model group (P < 0.05). Western blot assay found that compared with the normal group, the protein expression levels of Ras, Raf, MEK1/2, ERK1/2, C-MYC, C-FOS, and C-JUN were increased in the model group. However, all above protein levels except ERK1/2 in the 15- and 30-minute electroacupuncture groups were significantly lower than those in the model group (P < 0.01, P < 0.05). To conclude, electroacupuncture inhibits the degeneration of articular cartilage in osteoarthritis via Ras-Raf-MEK1/2-ERK1/2 signaling pathway and downregulating the expression level of interleukin-1β.

 

Key words: Cartilage, Synovial Membrane, Osteoarthritis, Electroacupuncture, Signal Transduction, Tissue Engineering

中图分类号: