中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (2): 264-268.doi: 10.3969/j.issn.2095-4344.2983

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

地龙提取物抑制核因子κB信号通路延缓椎间盘髓核细胞的退变

付远飞1,何升华2,赖居易2,孙志涛2,冯华龙2,蓝志明2   

  1. 1广州中医药大学第四临床医学院,广东省深圳市   518033;2深圳市中医院,广东省深圳市   518033
  • 收稿日期:2020-01-14 修回日期:2020-01-17 接受日期:2020-03-13 出版日期:2021-01-18 发布日期:2020-11-21
  • 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:付远飞,女,贵州省遵义市人,汉族,广州中医药大学在读博士,主要从事脊柱疾病研究。
  • 基金资助:
    深圳市科技创新委员会项目(JCYJ20170307155040463);广东省中医药局科研课题(20191276)

Pheretima extract ameliorates nucleus pulposus cell degeneration in the intervertebral disc by inhibiting nuclear factor-kappa B pathway 

Fu Yuanfei1, He Shenghua2, Lai Juyi2, Sun Zhitao2, Feng Hualong2, Lan Zhiming2    

  1. 1Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen 518033, Guangdong Province, China; 2Shenzhen Traditional Chinese Medicine Hospital, Shenzhen 518033, Guangdong Province, China
  • Received:2020-01-14 Revised:2020-01-17 Accepted:2020-03-13 Online:2021-01-18 Published:2020-11-21
  • Contact: He Shenghua, Master, Chief physician, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen 518033, Guangdong Province, China
  • About author:Fu Yuanfei, MD candidate, Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen 518033, Guangdong Province, China
  • Supported by:
    a grant from Shenzhen Science and Technology Innovation Committee, No. JCYJ20170307155040463; the Scientific Research Project of Guangdong Provincial Traditional Chinese Medicine Bureau, No. 20191276

摘要:

文题释义:
椎间盘:位于相邻椎体之间的软组织结构,由髓核、纤维环及软骨终板三部分组成,各部分相互作用,使椎间盘能够承载负荷,并具有一定的活动度。
髓核细胞退变:髓核位于椎间盘中央,呈胶冻状,对椎间盘生理功能的维持具有重要作用。因年龄、遗传、创伤等因素可使髓核细胞发生退变,主要表现为细胞增殖减缓、凋亡及衰老增多,细胞外基质分解代谢失衡。

背景:髓核细胞炎症微环境是促进髓核退变的重要因素,炎症因子通过激活核因子κB信号通路产生炎症级联反应,形成恶性循环,加速髓核退变进程。抑制核因子κB信号通路活性,可延缓椎间盘退变进展。
目的:探讨地龙提取物对髓核细胞退变的作用机制。
方法:采用冷浸法提取地龙活性成分,CCK-8法检测0,25,50,100,200,400 mg/L地龙提取物对大鼠髓核细胞活性的影响,筛选合适药物浓度用于后续实验。采用肿瘤坏死因子α诱导髓核细胞退变模型,选取50,100,200 mg/L地龙提取物作用于细胞模型,通过Western blot法检测聚蛋白聚糖、Ⅱ型胶原、肿瘤坏死因子α和白细胞介素6的蛋白表达;实时荧光定量PCR检测肿瘤坏死因子α和白细胞介素6的mRNA表达;采用细胞免疫荧光法检测核因子κB信号通路关键分子P65的入核表达。
结果与结论:①与空白组(0 mg/L地龙提取物)比较,400 mg/L地龙提取物抑制髓核细胞活性,其余浓度对髓核细胞活性无明显影响,选用50,100,200 mg/L地龙提取物用于后续实验;②与正常组(不作处理)比较,模型组聚蛋白聚糖、Ⅱ型胶原蛋白表达水平降低,肿瘤坏死因子α和白细胞介素6的蛋白和mRNA水平上调,P65入核增加;③与模型组比较,地龙提取物能增加细胞外基质成分聚蛋白聚糖、Ⅱ型胶原蛋白表达,下调炎症因子肿瘤坏死因子α和白细胞介素6的mRNA和蛋白表达水平,减少P65在核内的表达;④结果表明,地龙提取物能够减少炎症因子表达,增加细胞外基质合成,抑制核因子κB信号通路活性,地龙提取物可能通过作用于核因子κB信号通路进而延缓椎间盘髓核细胞退变。
https://orcid.org/0000-0002-0090-0901 (付远飞) 

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: 骨, 椎间盘, 退变, 髓核细胞, 地龙, 提取物, 核因子κB, 因子

Abstract: BACKGROUND: Inflammatory microenvironment of nucleus pulposus cells is an important factor to promote nucleus pulposus degeneration. Inflammatory factors amplify the cascade of inflammation by activating the nuclear factor-κB signaling pathway to form a vicious cycle and accelerate the process of nucleus pulposus degeneration. It could delay the progression of intervertebral disc degeneration by inhibiting the activity of nuclear factor-κB signaling pathway.  
OBJECTIVE: To investigate the mechanism of Pheretima extract on nucleus pulposus cell degeneration.
METHODS: Pheretima active ingredients were extracted by cold dipping. The cell counting kit-8 method was used to detect the effects of 0, 25, 50, 100, 200, 400 mg/L Pheretima extract on rat nucleus pulposus cell activity, and then suitable drug concentrations were chosen for following research. Tumor necrosis factor-α (TNF-α) was used to stimulate nucleus pulposus cells to induce the nucleus pulposus cell degeneration model. Pheretima extracts (50, 100, 200 mg/L) were used to treat the cell model. Western blot was used to detect the expression of Aggrecan, Collagen II, TNF-α and interleukin-6. RT-qPCR was used to detect mRNA expression of TNF-α and interleukin-6. Immunofluorescence was used to detect the nuclear expression of P65 in the nucleus pulposus cells.  
RESULTS AND CONCLUSION: Compared with the blank group (0 mg/L), 400 mg/L Pheretima extract inhibited the activity of nucleus pulposus cells, and 50, 100, 200 mg/L extracts of Pheretima were used for subsequent experimental research. Compared with the normal group, the expression of Aggrecan and Collagen II in the model group was reduced, the protein and mRNA expression levels of TNF-α and interleukin-6 were up-regulated, and P65 expression increased in the nucleus. Compared with the model group, Pheretima extract could increase the expression of Aggrecan and Collagen II, down-regulate the protein and mRNA levels of TNF-α and interleukin-6, and reduce P65 expression in the nucleus. To conclude, Pheretima extract can reduce the expression of inflammatory factors, increase the synthesis of extracellular matrix and inhibit nuclear factor-κB pathway activity. Pheretima extract may ameliorate nucleus pulposus cell degeneration in the intervertebral disc via the nuclear factor-κB signaling pathway.

Key words: bone, intervertebral disc, degeneration, nucleus pulposus cells, Pheretima, extract, nuclear factor-κB, factor

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