中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (14): 2177-2182.doi: 10.3969/j.issn.2095-4344.3123

• 脊柱组织构建 spinal tissue construction • 上一篇    下一篇

腰突颗粒通过调控miR-221表达干预髓核细胞的增殖与凋亡

何升华1,付远飞2,蓝志明1,孙志涛1,赖居易1,冯华龙1,郭子宾2,李   盖2   

  1. 1深圳市中医院,广东省深圳市   518033;2广州中医药大学第四临床医学院,广东省深圳市   518033
  • 收稿日期:2020-05-22 修回日期:2020-05-23 接受日期:2020-06-12 出版日期:2021-05-18 发布日期:2020-12-30
  • 通讯作者: 何升华,硕士,主任医师,深圳市中医院,广东省深圳市 518033
  • 作者简介:何升华,男,1965年生,安徽省安庆市人,汉族,2003年安徽中医学院毕业,硕士,主任医师,主要从事脊柱病研究。
  • 基金资助:
    深圳市科技创新委员会项目(JCYJ20170307155040463),项目负责人:何升华

Yaotu Granule deals with the proliferation and apoptosis of nucleus pulposus cells via regulating the expression of microRNA-221

He Shenghua1, Fu Yuanfei2, Lan Zhiming1, Sun Zhitao1, Lai Juyi1, Feng Hualong1, Guo Zibin2, Li Gai2    

  1. 1Shenzhen Traditional Chinese Medicine Hospital, Shenzhen 518033, Guangdong Province, China; 2Fourth Clinical Medical School, Guangzhou University of Chinese Medicine, Shenzhen 518033, Guangdong Province, China
  • Received:2020-05-22 Revised:2020-05-23 Accepted:2020-06-12 Online:2021-05-18 Published:2020-12-30
  • Contact: He Shenghua, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen 518033, Guangdong Province, China
  • About author:He Shenghua, Master, Chief physician, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen 518033, Guangdong Province, China
  • Supported by:
    a grant from Shenzhen Municipal Science and Technology Innovation Commission, No. JCYJ20170307155040463 (to HSH)

摘要:

文题释义:
髓核:位于椎间盘中央,呈高度凝胶状,富含胶原蛋白和蛋白聚糖,髓核细胞位于凝胶状基质中,为圆形或椭圆形类软骨细胞,髓核细胞与细胞外基质对维持椎间盘生理功能具有重要作用。
microRNA:是一类非编码RNA,长度为21-25个核苷酸,与靶基因mRNA的3’非翻译区结合,从而介导靶基因mRNA降解、抑制翻译和mRNA不稳定。

背景:microRNA与椎间盘退变密切相关,腰突颗粒能显著延缓椎间盘退变进展。
目的:通过研究miR-221对髓核细胞增殖与凋亡功能的影响及腰突颗粒对miR-221的调控作用探讨腰突颗粒延缓椎间盘退变的机制。
方法:应用miR-221模拟物(模拟物组)及抑制剂(抑制剂组)转染大鼠髓核细胞,肿瘤坏死因子α诱导髓核细胞退变模型(模型组),并分别应用100,200 mg/L腰突颗粒冻干粉处理退变的髓核细胞(腰突颗粒低、高浓度组),模拟物+腰突颗粒组为同时加入miR-221模拟物和200 mg/L腰突颗粒冻干粉处理的髓核细胞。采用CCK-8法检测细胞增殖,TUNEL法检测凋亡情况,RT-qPCR检测miR-221的mRNA表达,Western blot检测凋亡相关蛋白Bax和Bcl-2的蛋白表达。
结果与结论:①与模拟物阴性对照组比较,模拟物组在24,48,72 h细胞增殖减缓(P < 0.05),凋亡增多(P < 0.05);与抑制剂阴性对照组比较,抑制剂组在24,48,72 h细胞增殖明显(P < 0.05),凋亡减少(P < 0.05);与正常组比较,模型组细胞增殖抑制(P < 0.05),凋亡增加(P < 0.05),miR-221表达上调(P < 0.05);②与模型组比较,腰突颗粒低、高浓度组细胞明显增殖(P < 0.05),细胞凋亡率下降(P < 0.05),miR-221表达下调(P < 0.05);与模拟物组比较,模拟物+腰突颗粒组细胞凋亡降低(P < 0.05),细胞增殖改善(P < 0.05),Bax蛋白表达下降(P < 0.05),Bcl-2蛋白表达增高(P < 0.05)。③提示:miR-221影响髓核细胞增殖与凋亡,腰突颗粒通过下调miR-221的表达发挥延缓椎间盘退变的作用。
https://orcid.org/0000-0003-2435-0227 (何升华) 

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: 中药, 腰突颗粒, miR-221, 髓核细胞, 增殖, 凋亡, 椎间盘, 脊柱

Abstract: BACKGROUND: MicroRNA is involved in intervertebral disc degeneration, and Yaotu Granule can significantly delay the progress of intervertebral disc degeneration.
OBJECTIVE: To investigate the effect of Yaotu Granule in the proliferation and apoptosis of nucleus pulposus cells by regulating the expression of microRNA-221 (miR-221). 
METHODS: MiR-221 mimics and inhibitors were transfected into rat nucleus pulposus cells to establish miR-221 overexpression and inhibition models. Tumor necrosis factor-α was used to induce nucleus pulposus cell degeneration model. The degenerated nucleus pulposus cells were treated with 100 and 200 mg/L Yaotu Granule freeze-dried powder (low and high dose groups). In the miR-221 mimics + Yaotu Granule group, miR-221 mimic and 200 mg/L Yaotu Granule freeze-dried powder were added. Cell counting kit-8 and TUNEL assay were used to detect the cell proliferation and apoptosis, RT-qPCR was used to detect mRNA expression of miR-221, and western blot was used to detect the expression of Bax and Bcl-2. 
RESULTS AND CONCLUSION: MiR-221 mimics reduced cell prolifecation at 24, 48, 72 hours (P < 0.05) and promoted cell apoptosis at 48 hours (P < 0.05); miR-221 inhibitors had the opposite results (P < 0.05). Compared with the normal group, tumor necrosis factor-α inhibited cell proliferation, increased cell apoptosis, and upregulated miR-221 expression (all P < 0.05). Compared with the model group, low- and high-dose Yaotu Granules increased cell proliferation, reduced cell apoptosis, and downregulated miR-221 expression (all P < 0.05). Compared with the mimics group, cell proliferation improved, apoptosis rate decreased, the protein expression of Bax reduced, and the Bcl-2 protein expression up-regulated in the miR-221 mimics + Yaotu Granule group (all P < 0.05). To conclude, miR-221 has an effect on the proliferation and apoptosis of nucleus pulposus cells, and Yaotu Granule can delay the progression of intervertebral disc degeneration by downregulating the expression of miR-221.  


Key words: Chinese herb, Yaotu Granule, miR-221, nucleus pulposus cells, proliferation, apoptosis, intervertebral disc, spine

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