中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (24): 3803-3809.doi: 10.12307/2023.668

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

淫羊藿苷调控髓核来源间充质干细胞凋亡修复椎间盘退变

张文捷1,张  勇1,史  明1,唐广军1,石鹏志2 ,王俊武2,胡  满2,王平川2 ,张  亮2   

  1. 1International Zhuang Hospital, Guangxi University of Traditional Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China; 2Clinical College of Yangzhou University, Yangzhou 225001, Jiangsu Province, China
  • 收稿日期:2022-05-31 接受日期:2022-09-15 出版日期:2023-08-28 发布日期:2023-01-18
  • 通讯作者: 张勇,博士,副主任医师,广西中医药大学国际壮医医院,广西壮族自治区南宁市 530001
  • 作者简介:张文捷,男,1969年生,江西省鹰潭市人,汉族,2003年第三军医大学外科(野战外)学毕业,博士,主任医师,主要从事骨关节与脊柱科研究。
  • 基金资助:
    广西壮族自治区中医药管理局自筹经费科研课题(GZZC2020146),项目负责人:张勇;广西国际壮医医院重点项目(GZ2021009),项目负责人:张勇

Icariin regulates apoptosis of nucleus pulposus-derived mesenchymal stem cells to repair intervertebral disc degeneration

Zhang Wenjie1, Zhang Yong1, Shi Ming1, Tang Guangjun1, Shi Pengzhi2, Wang Junwu2, Hu Man2, Wang Pingchuan2, Zhang Liang2   

  1. 1International Zhuang Hospital, Guangxi University of Traditional Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China; 2Clinical College of Yangzhou University, Yangzhou 225001, Jiangsu Province, China
  • Received:2022-05-31 Accepted:2022-09-15 Online:2023-08-28 Published:2023-01-18
  • Contact: Zhang Yong, MD, Associate Chief physician, International Zhuang Hospital, Guangxi University of Traditional Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China
  • About author:Zhang Wenjie, MD, Chief physician, International Zhuang Hospital, Guangxi University of Traditional Chinese Medicine, Nanning 530001, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    The Traditional Chinese Medicine Administration Subject of Guangxi Zhuang Autonomous Region, No. GZZC2020146 (to ZY); a grant from International Zhuang Hospital of Guangxi Zhuang Autonomous Region, No. GZ2021009 (to ZY)

摘要:

文题释义:

淫羊藿苷:是中国传统中药淫羊藿的主要活性成分,属于8-异戊烯基黄酮苷类化合物。由于具有诸多生物活性,如抗氧化应激、抗炎、抗抑郁和抗肿瘤等,淫羊藿苷在骨质疏松症、心血管疾病、神经系统疾病以及生殖系统疾病等诸多疾病中被广泛开展研究。
髓核来源间充质干细胞:在正常或退变椎间盘髓核组织内均存在间充质干细胞,可分化为髓核细胞来维持髓核功能。髓核来源间充质干细胞的凋亡增加可能是椎间盘退变的重要原因之一。

背景:椎间盘退变是导致腰痛的最常见原因之一,内源性髓核来源间充质干细胞的数量减少及功能减退可能是导致椎间盘退变的重要原因,一定范围内的淫羊藿苷可能通过PI3K/Akt信号通路减少间充质干细胞凋亡。
目的:探讨淫羊藿苷调控髓核来源间充质干细胞凋亡的可能机制。
方法:获取SD大鼠退变椎间盘髓核来源间充质干细胞,以不同浓度淫羊藿苷干预第3代髓核来源间充质干细胞,CCK-8法检测细胞活力及增殖情况。将第3代髓核来源间充质干细胞分为对照组、淫羊藿苷组及LY294002组,干预1周后通过流式细胞仪检测细胞凋亡率,Tunel荧光检测Tunel染色阳性细胞数,RT-PCR及免疫荧光检测Caspase-3、Bcl-2、Bax、p-Akt及p53的mRNA及蛋白表达水平。将16只椎间盘退变模型SD大鼠均分为淫羊藿苷组[淫羊藿苷灌胃50 mg/(kg•d)]及对照组(等量生理盐水灌胃),在治疗前、治疗后2周及4周时行大鼠尾椎X射线片、MRI检查及苏木精-伊红染色评估椎间盘退变。

结果与结论:①一定浓度范围内的淫羊藿苷可促进髓核间充质干细胞增殖,在0.1 μmol/L时细胞活力达到最佳(P < 0.05);②与对照组比较,淫羊藿苷组的细胞凋亡率、Tunel染色阳性细胞数、Caspase-3、Bax及p53表达显著下降,p-Akt及Bcl-2表达显著增加(P < 0.05);PI3K/Akt信号通路抑制剂LY294002干预后可以逆转淫羊藿苷的保护作用(P < 0.05);③在动物模型水平,淫羊藿苷治疗后椎间盘退变程度得到延缓,与对照组比较,治疗4周时椎间隙高度指数及MRI评分及苏木精-伊红染色评分差异有显著性意义(P < 0.05);④结果表明,在一定浓度范围内,淫羊藿苷以浓度依赖性方式促进退变椎间盘来源髓核间充质干细胞增殖,可通过PI3K/Akt信号通路调节髓核间充质干细胞凋亡,进而一定程度上改善椎间盘退变程度。

https://orcid.org/0000-0001-5357-0128 (张文捷) 

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: 淫羊藿苷, 髓核间充质干细胞, 椎间盘退变, 凋亡, PI3K/Akt信号通路

Abstract: BACKGROUND: Intervertebral disc degeneration is one of the most common causes of low back pain. The decrease in the number and dysfunction of endogenous nucleus pulposus-derived mesenchymal stem cells may be an important cause of intervertebral disc degeneration. Icariin within a certain range may reduce the apoptosis of mesenchymal stem cells through the PI3K/Akt signaling pathway.  
OBJECTIVE: To investigate the mechanisms underlying the effects of icariin on apoptosis of nucleus pulposus-derived mesenchymal stem cells.
METHODS: The nucleus pulposus-derived mesenchymal stem cells were isolated from degenerated disc of Sprague-Dawley rats. Nucleus pulposus-derived mesenchymal stem cells of passage 3 were treated with different concentrations of icariin. CCK-8 assay was used to detect cell viability and proliferation. Nucleus pulposus-derived mesenchymal stem cells of passage 3 were divided into control, icariin, and LY294002 groups. The apoptosis was detected by flow cytometry and TUNEL staining at 1 week after treatment. The mRNA and protein expression of Caspase-3, Bcl-2, Bax and PI3K/Akt signaling pathway-related proteins p-Akt and p53 was detected by real-time polymerase chain reaction and western blotting. Sixteen Sprague-Dawley rat intervertebral disc degeneration models were equally divided into icariin (icariin 50 mg/kg per day intragastrically) and control groups (equivalent normal saline intragastrically). X-ray, MRI and hematoxylin-eosin staining were performed to evaluate disc degeneration before, 2 and 4 weeks after treatment.  
RESULTS AND CONCLUSION: (1) Icariin promoted the proliferation of nucleus pulposus-derived mesenchymal stem cells at a certain concentration range, and the best concentration was 0.1 μmol/L (P < 0.05). (2) The apoptosis rate, the number of TUNEL-positive cells, mRNA and protein expression of Caspase-3, Bax and p53 in the icariin group were significantly decreased compared with the control group, while the expression levels of p-Akt and Bcl-2 were significantly increased (P < 0.05). LY294002 (PI3K/Akt signaling pathway inhibitor) reversed the protective effect of icariin on nucleus pulposus-derived mesenchymal stem cells (P < 0.05). (3) The disc degeneration was delayed after icariin treatment in the animal models. There were significant differences in the Disk Height Index, MRI scores, and hematoxylin and eosin staining scores between the icariin and control groups at 4 weeks (P < 0.05). (4) The results show that icariin can promote the proliferation of nucleus pulposus-derived mesenchymal stem cells in a concentration-dependent manner within a certain concentration range. Furthermore, icariin can inhibit nucleus pulposus-derived mesenchymal stem cell apoptosis by activating PI3K/Akt signaling pathway to delay disc degeneration.

Key words: icariin, nucleus pulposus-derived mesenchymal stem cell, disc degeneration, apoptosis, PI3K/Akt signaling pathway

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