中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (35): 5596-5601.doi: 10.12307/2022.911

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

温针灸调控膝骨关节炎模型兔关节软骨中PI3K/Akt信号通路的变化

武永利1,2,刘  娣1,王  铎3,刘君伟1,马遇原3   

  1. 1宁夏医科大学总医院中医骨伤科,宁夏回族自治区银川市  750004;2宁夏医科大学回医药现代化教育部重点实验室,宁夏回族自治区银川市 750004;3宁夏医科大学中医学院,宁夏回族自治区银川市  750004
  • 收稿日期:2021-11-15 接受日期:2022-01-28 出版日期:2022-12-18 发布日期:2022-05-16
  • 通讯作者: 武永利,教授,主任医师,博士生导师,宁夏医科大学总医院中医骨伤科,宁夏回族自治区银川市 750004;宁夏医科大学回医药现代化教育部重点实验室,宁夏回族自治区银川市 750004
  • 作者简介:武永利,男,1968年生,宁夏回族自治区银川市人,教授,主任医师,博士生导师,主要从事退行性脊柱关节病的基础及临床研究。
  • 基金资助:
    国家自然科学基金(81760891,82160939),项目负责人:武永利

Effect of warm acupuncture on PI3K/Akt signaling pathway in articular cartilage of a rabbit knee osteoarthritis model

Wu Yongli1, 2, Liu Di1, Wang Duo3, Liu Junwei1, Ma Yuyuan3   

  1. 1Department of Orthopedics and Traumatology of Traditional Chinese Medicine, the General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 2Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 3School of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Received:2021-11-15 Accepted:2022-01-28 Online:2022-12-18 Published:2022-05-16
  • Contact: Wu Yongli, Department of Orthopedics and Traumatology of Traditional Chinese Medicine, the General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Wu Yongli, Professor, Chief physician, Doctoral supervisor, Department of Orthopedics and Traumatology of Traditional Chinese Medicine, the General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, Nos. 81760891 and 82160939 (to WYL)

摘要:

文题释义:
软骨细胞凋亡:作为细胞程序性死亡中的一种,在骨关节炎的发病中具有重要影响,该过程对软骨的破坏和重建起到重要作用,是造成软骨退行性病理改变的主要因素。
温针灸:温针灸疗法作为中医特色疗法中的一种,具有舒筋止痛、温经通络的作用,对于治疗早、中期膝骨关节炎患者疗效确切,在中医骨伤治疗膝骨关节炎中应用广泛。

背景:温针灸临床治疗膝骨关节炎疗效显著,但基础治疗机制尚未明确。
目的:观察温针灸对兔膝骨关节炎模型关节软骨中PI3K/Akt信号通路及其下游因子Bcl-2、Bax表达的影响。
方法:取6月龄新西兰兔40只,采用随机数字表法分为正常组、模型组、药物组、温针灸组,每组10只。模型组、药物组、温针灸组兔右后肢膝关节伸直位以石膏管型固定4周,制备膝骨关节炎模型。造模成功后,模型组每日置于兔架上固定15 min,药物组每天行硫酸氨基葡萄糖灌胃治疗(77 mg/kg,1次/d),温针灸组每天行温针灸治疗(15 min/次,1次/d)。连续治疗28 d后,利用苏木精-伊红染色观察软骨损伤程度,Tunel法检测软骨细胞凋亡,RT-PCR法检测软骨组织中PI3K、Akt、Bcl-2、Bax的mRNA表达,Western blot法检测软骨组织中PI3K、Akt、Bcl-2、Bax 的蛋白表达。
结果与结论:①苏木精-伊红染色显示,模型组软骨细胞数量减少,细胞排列无序,层次紊乱,软骨面被破坏,Mankin评分显著升高;药物组与温针灸组软骨细胞数量明显增多,基质着色深,Mankin评分降低;②与正常组相比,模型组软骨细胞凋亡率增高(P < 0.05);与模型组相比,药物组、温针灸组软骨细胞凋亡率降低(P < 0.05);③RT-PCR与Western blot检测显示,与正常组相比,模型组PI3K、Akt、Bcl-2的mRNA与蛋白表达降低(P < 0.05),Bax的mRNA与蛋白表达升高(P < 0.05);与模型组相比,温针灸组与药物组PI3K、Akt、Bcl-2的mRNA与蛋白表达升高(P < 0.05),Bax的mRNA与蛋白降低(P < 0.05);④结果表明温针灸可通过调控PI3K/Akt信号通路引起下游因子Bcl-2表达升高、Bax表达降低,进而抑制软骨细胞过度凋亡,达到保护关节软骨的作用。

https://orcid.org/0000-0001-9774-453X(武永利) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 膝骨关节炎, 温针灸, 软骨细胞凋亡, PI3K/Akt信号通路, 下游因子

Abstract: BACKGROUND: Warm acupuncture is an effective treatment for knee osteoarthritis; however, the therapeutic mechanism is not clear
OBJECTIVE: To observe the effects of warm acupuncture on PI3K/Akt signaling pathway and expression of downstream factors Bcl-2 and Bax in the articular cartilage of a rabbit model of knee osteoarthritis.
METHODS: Forty 6-month-old New Zealand rabbits were randomly divided into blank group, model group, glucosamine sulfate group and warm acupuncture group, with 10 rabbits in each group. The blank group was not modeled, and in the other three groups, the knee joint of the rabbit right hindlimb was immobilized in extension position using a plaster tube for 4 weeks to prepare the rabbit knee osteoarthritis model. After successful modeling, the blank group was not interfered. The rabbits in the model group were fixed in the rabbit frame for 15 minutes daily, those in the glucosamine sulfate group were treated with glucosamine sulfate by gavage at 77 mg/kg daily, and those in the warm acupuncture group were treated with warm acupuncture for 15 minutes daily, for 28 continuous days in total. After the intervention, hematoxylin-eosin staining was performed to observe the severity of cartilage damage. Cell apoptosis in chondrocytes was observed using TUNEL assay. mRNA and protein expressions of PI3K, Akt, Bcl-2 and Bax in cartilage tissue were detected by RT-PCR and western blot, respectively.
RESULTS AND CONCLUSION: The model group had a rough surface of articular cartilage, disordered arrangement and reduced number of chondrocytes, and significantly increased Mankin score, while the glucosamine sulfate and warm acupuncture groups showed increased number of chondrocytes, deeply stained matrix, and reduced Mankin score. Compared with the blank group, the apoptotic rate of chondrocytes was significantly increased in the model group (P < 0.05). Compared with the model group, the apoptotic rate of chondrocytes was significantly decreased in the glucosamine sulfate and warm acupuncture groups (P < 0.05). Compared with the blank group, the mRNA and protein expressions of PI3K, Akt and Bcl-2 were significantly decreased and the mRNA and protein expressions of Bax were significantly increased in the model group (P < 0.05). Compared with the model group, mRNA and protein expressions of PI3K, Akt and Bcl-2 were significantly increased and the mRNA and protein expressions of Bax were significantly decreased in the glucosamine sulfate and warm acupuncture groups (P < 0.05). To conclude, warm acupuncture can increase the expression of bcl-2 and decrease the expression of Bax by regulating PI3K/Akt signaling pathway, and then inhibit the excessive apoptosis of chondrocytes to protect articular cartilage.

Key words: knee osteoarthritis, warm acupuncture, chondrocyte apoptosis, PI3K/Akt signaling pathway, downstream factor

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