中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (26): 4125-4128.doi: 10.3969/j.issn.2095-4344.2762

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

持续负载压力对髓核细胞凋亡及Wnt/β-catenin信号通路的影响

尹逊路12,朱立国13,冯敏山13,于  12,展嘉文12,梁  12,韩  12   

  1. 1中国中医科学院望京医院,北京市  1001022中国中医科学院,北京市  1001023中医正骨技术北京市重点实验室,北京市  100102

  • 收稿日期:2019-08-08 修回日期:2019-08-10 接受日期:2019-10-29 出版日期:2020-09-18 发布日期:2020-08-31
  • 通讯作者: 朱立国,博士,主任医师,中国中医科学院望京医院,北京市 100102;中医正骨技术北京市重点实验室,北京市 100102 冯敏山,博士,主任医师,中国中医科学院望京医院,北京市 100102;中医正骨技术北京市重点实验室,北京市 100102
  • 作者简介:尹逊路,男,1988年生,2016年中国中医科学院望京医院毕业,博士,主治医师,主要从事脊柱及相关疾病研究。
  • 基金资助:
    国家自然科学基金(81804120);国家自然科学基金(81774330);国家中医药管理局专项课题(JDZX2015274) 

Effect of continuous loading pressure on apoptosis and Wnt/beta-catenin signaling pathway in nucleus pulposus cells

Yin Xunlu1, 2, Zhu Liguo1, 3, Feng Minshan1, 3, Yu Jie1, 2, Zhan Jiawen1, 2, Liang Long1, 2, Han Tao1, 2   

  1. 1Wangjing Hospital of China Academy of Chinese Medical Sciences, Beijing 100102, China; 2China Academy of Chinese Medical Sciences, Beijing 100102, China; 3Beijing Key Laboratory of Bone-Setting Technology of Traditional Chinese Medicine, Beijing 100102, China

  • Received:2019-08-08 Revised:2019-08-10 Accepted:2019-10-29 Online:2020-09-18 Published:2020-08-31
  • Contact: Zhu Liguo, MD, Chief physician, Wangjing Hospital of China Academy of Chinese Medical Sciences, Beijing 100102, China; Beijing Key Laboratory of Bone-Setting Technology of Traditional Chinese Medicine, Beijing 100102, China Feng Minshan, MD, Chief physician, Wangjing Hospital of China Academy of Chinese Medical Sciences, Beijing 100102, China; Beijing Key Laboratory of Bone-Setting Technology of Traditional Chinese Medicine, Beijing 100102, China
  • About author:Yin Xunlu, MD, Attending physician, Wangjing Hospital of China Academy of Chinese Medical Sciences, Beijing 100102, China; China Academy of Chinese Medical Sciences, Beijing 100102, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81804120 and 81774330; the Special Project of State Administration of Traditional Chinese Medicine, No. JDZX2015274

摘要:


文题释义:

细胞凋亡:是指为维持内环境稳定,由基因控制的细胞自主的有序的死亡。细胞凋亡与细胞坏死不同,细胞凋亡不是一件被动的过程,而是主动过程,它涉及一系列基因的激活、表达以及调控等作用;它并不是病理条件下自体损伤的一种现象,而是为更好地适应生存环境而主动争取的一种死亡过程。髓核细胞的过度凋亡是导致椎间盘退变的重要因素。

Wnt信号传导途径是由配体蛋白质Wnt和膜蛋白受体结合激发的一组多下游通道的信号转导途径,通过细胞表面受体胞内段的活化过程将细胞外信号传递到细胞内。Wnt家族分泌蛋白、Frizzled家族跨膜受体蛋白Dishevelled(Dsh)、糖原合成激酶3(GSK3)APCAxinβ-连环蛋白及TCF/LEF家族转录调节因子等构成了经典通路,即Wnt/β-catenin信号通路。

背景:课题组前期研究发现,持续负载压力可通过减少髓核细胞数量、降低髓核组织中细胞外基质的表达诱导椎间盘退变,但其作用机制尚不明确。

目的探讨持续负载压力对髓核细胞凋亡及Wnt/β-catenin信号通路的影响。

方法采用体外兔脊柱运动节段加载模型,将脊柱运动节段分为空白对照组、压力组和观察组,压力组给予3 kg持续负载压力,观察组给予3 kg持续负载压力及Wnt通路激活剂SB216763(20 μmol/L),空白对照组不做任何处理;干预3 d后,采用苏木精-伊红染色观察髓核组织病理变化,Western blot法检测髓核组织中Caspase-3GSK-3β蛋白表达量。

结果与结论与空白对照组相比,压力组Caspase-3GSK-3β蛋白表达量显著增高(P < 0.05);与压力组相比,观察组Caspase-3GSK-3β蛋白表达量显著下降(P < 0.05)病理组织学显示,压力组髓核细胞数量减少,细胞形态改变;观察组髓核细胞数量相对较多,细胞形态相对规整;结果表明,持续负载压力可通过介导Wnt/β-catenin信号通路调控Caspase-3GSK-3β的表达,促进髓核细胞凋亡

ORCID: 0000-0002-3388-4215(尹逊路)


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: 髓核细胞, 细胞凋亡, 持续负载压力, Wnt/β-catenin信号通路, 脊柱运动节段

Abstract:

BACKGROUND: Previous studies have found that continuous loading pressure can induce intervertebral disc

degeneration by reducing the number of nucleus pulposus cells and reducing the expression of extracellular matrix in the nucleus pulposus. However, its mechanism of action is unclear.

OBJECTIVE: To study the effect of continuous loading pressure on apoptosis and Wnt/β-catenin signaling pathway in nucleus pulposus cells.

METHODS: The in vitro models of rabbit spinal motion segment under loading pressure were established and divided into control group (no treatment), pressure group (3 kg continuous loading pressure) and observation group (3 kg continuous loading pressure + 20 μmol/L SB216763). After 3 days of intervention, the pathological changes of nucleus pulposus cells were detected by hematoxylin-eosin staining, and the expression of caspase-3 and GSK-3β protein in nucleus pulposus tissue was detected by western blot assay.

RESULTS AND CONCLUSION: Compared with the control group, the expression of Caspase-3 and GSK-3β protein increased significantly under the continuous load pressure (P < 0.05). Compared with the pressure group, the expression of Caspase-3 and GSK-3β protein decreased significantly in the observation group (P < 0.05). Pathological examination showed that the number of nucleus pulposus cells in the pressure group was reduced accompanied by morphological changes of the cells. In the observation group, the number of nucleus pulposus cells was relatively large and the cell morphology was relatively regular. In conclusion, continuous loading pressure can regulate Caspase-3 and GSK-3βexpression via Wnt/beta-catenin signaling pathway, and promote the apoptosis of nucleus pulposus cells.

Key words: nucleus pulposus cells, apoptosis, continuous loading pressure, Wnt/β-catenin signaling pathway, spinal motion segment

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