中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (14): 2199-2204.doi: 10.3969/j.issn.2095-4344.3145

• 组织构建与生物活性因子 tissue construction and bioactive factors • 上一篇    下一篇

滑膜细胞炎性因子水平及miR-145/MKK4分子轴的关联性

朱丽璇,崔  玥,罗  静   

  1. 云南省第一人民医院疼痛科,云南省昆明市   650032
  • 收稿日期:2019-03-14 修回日期:2019-03-22 接受日期:2020-09-10 出版日期:2021-05-18 发布日期:2020-12-30
  • 通讯作者: 罗静,副主任医师,云南省第一人民医院疼痛科,云南省昆明市 650032
  • 作者简介:朱丽璇,女,1972年生,云南省昆明市人,汉族,1996年昆明医学院毕业,副主任医师,主要从事疼痛诊疗学研究。
  • 基金资助:
    云南省卫生科技计划项目(2018NS0243),项目负责人:罗静

Correlation between inflammatory factors in synovial cells and microRNA-145/mitogen-activated protein kinase 4 molecular axis

Zhu Lixuan, Cui Yue, Luo Jing   

  1. Department of Pain, The First People’s Hospital of Yunnan Province, Kunming 650032, Yunnan Province, China
  • Received:2019-03-14 Revised:2019-03-22 Accepted:2020-09-10 Online:2021-05-18 Published:2020-12-30
  • Contact: Luo Jing, Associate chief physician, Department of Pain, The First People’s Hospital of Yunnan Province, Kunming 650032, Yunnan Province, China
  • About author:Zhu Lixuan, Associate chief physician, Department of Pain, The First People’s Hospital of Yunnan Province, Kunming 650032, Yunnan Province, China
  • Supported by:
    Health Science and Technology Project of Yunnan Province of China, No. 2018NS0243 (to LJ)

摘要:

文题释义:
99Tc-MDP:锝[99Tc]亚甲基二膦酸盐,是99mTc-MDP的异构体,可用于治疗类风湿性关节炎、强直性脊椎炎、骨坏死、骨关节炎等疾病。
炎症反应:炎症是一种重要的免疫反应,在感染或受伤期间被激活,并在各种有害条件下维持组织稳态,是许多生理病理过程的基础。促炎因子如肿瘤坏死因子α、白细胞介素1、白细胞介素6可促进炎症反应的发生,抗炎因子白细胞介素4、白细胞介素10、白细胞介素13等可抑制炎症反应,正常情况下,促炎因子和抗炎因子之间处于动态平衡。

背景:炎症因子被证明在软骨细胞和双指关节细胞中表达异常,靶向炎症途径可能是治疗骨关节炎的有效策略,但目前鲜有关于滑膜细胞炎症反应的研究报道。
目的:探讨99Tc-MDP通过miR-145/MKK4分子轴对滑膜细胞产生炎性因子的影响。
方法:①骨关节炎成纤维样滑膜细胞(HFLS-RA细胞)经过不同质量浓度99Tc-MDP药物处理48 h,qRT-PCR实验检测HFLS-RA细胞中miR-145以及炎性因子caspase 1、白细胞介素1β、白细胞介素18和肿瘤坏死因子α的表达水平,CCK-8实验检测HFLS-RA细胞存活率;②确定99Tc-MDP干预最佳质量浓度后,将HFLS-RA细胞分为4组:NC组(空白对照组,不经任何处理)、99Tc-MDP组(13 μg/L 99Tc-MDP处理HFLS-RA细胞48 h)、99Tc-MDP+miR-145 inhibitor组(13 μg/L 99Tc-MDP处理HFLS-RA细胞48 h同时在细胞中转染miR-145 inhibitor)、99Tc-MDP+miR-145 inhibitor+sh-MKK4组(13 μg/L 99Tc-MDP处理HFLS-RA细胞48 h同时在细胞中转染miR-145 inhibitor+sh-MKK4),qRT-PCR实验检测HFLS-RA细胞中miR-145以及炎性因子caspase 1、白细胞介素1β、白细胞介素18和肿瘤坏死因子α的表达水平,CCK-8实验检测HFLS-RA细胞存活率。
结果与结论:①99Tc-MDP可显著抑制HFLS-RA细胞炎性因子caspase 1、白细胞介素1β、白细胞介素18和肿瘤坏死因子α表达和细胞存活率,且半抑制浓度IC50=13 μg/L;②99Tc-MDP可显著上调HFLS-RA细胞中miR-145的表达,下调MKK4表达(P < 0.01);③miR-145靶向MKK4,且过表达miR-145可显著抑制MKK4的表达;④与99Tc-MDP组相比,99Tc-MDP+miR-145 inhibitor组可显著抑制HFLS-RA细胞中miR-145的表达(P < 0.05),促进细胞中炎性因子的表达(P < 0.05)和细胞增殖(P < 0.05),相比较于99Tc-MDP+miR-145 inhibitor+sh-MKK4组,99Tc-MDP+miR-145 inhibitor组可明显促进HFLS-RA细胞增殖(P < 0.05)和炎性因子的表达(P < 0.05);⑤结果表明,99Tc-MDP通过miR-145靶向下调MKK4抑制HFLS-RA细胞产生炎性因子,缓解骨关节炎发生。

关键词: 99Tc-MDP, miR-145, MKK4, 炎性因子, 炎症, 滑膜细胞, 骨关节炎

Abstract: BACKGROUND: Inflammatory cytokines have been shown to be abnormally expressed in chondrocytes and double-knuckle cells. Targeting inflammatory pathways may be an effective strategy for the treatment of osteoarthritis, but few reports focus on inflammatory responses in synovial cells.
OBJECTIVE: To investigate the effect of 99Tc-MDP on synovial cells-produced inflammatory factors through microRNA-145 (miR-145)/mitogen-activated protein kinase 4 (MKK4) molecular axis. 
METHODS: Osteoarthritis fibroblast-like synovial cells (HFLS-RA cells) were treated with 99Tc-MDP of  different mass concentrations for 48 hours. The expression levels of miR-145 and inflammatory factors, caspase 1, interleukin (IL)-1, IL-18 and tumor necrosis factor-α (TNF-α) in HFLS-RA cells were measured by qRT-PCR, and the survival rate of HFLS-RA cells was measured by cell counting kit-8. After determining the optimal mass concentration for 99Tc-MDP intervention, HFLS-RA cells were divided into four groups: blank control group (without any treatment), 99Tc-MDP group (13 μg/L 99Tc-MDP treated HFLS-RA cells for 48 hours), 99Tc-MDP+miR-145 inhibitor group (13 μg/L 99Tc-MDP treated HFLS-RA cells followed by transfection with miR-145 inhibitor), 99Tc-MDP+miR-145 inhibitor+sh-MKK4 group (13 μg/L 99Tc-MDP treated HFLS-RA cells followed by transfection with miR-145 inhibitor+sh-MKK4). The expression levels of miR-145 and the inflammatory factors, caspase 1, IL-1, IL-18 and TNF-α, in HFLS-RA cells were measured by qRT-PCR, and the survival rate of HFLS-RA cell was measured by cell counting kit-8.
RESULTS AND CONCLUSION: 99Tc-MDP significantly inhibited the expression of caspase 1, IL-1, IL-18 and TNF-α as well as the cell survival rate of hFLS-RA cells. The 50% inhibiting concentration of 99Tc-MDP was 13 μg/L. 99Tc-MDP significantly upregulated the expression of miR-145, and downregulated the expression of MKK4 expression in HFLS-RA cells (P < 0.01). MiR-145 targeted MKK4, and overexpression of miR-145 could significantly inhibit the expression of MKK4. Compared with the 99Tc-MDP group, the 99Tc-MDP+miR-145 inhibitor group significantly inhibited the expression of miR-145 in HFLS-RA cells (P < 0.05) and promoted the expression of inflammatory factors in the cells (P < 0.05) and cell proliferation (P < 0.05). Compared with the 99Tc-MDP+miR-145 inhibitor+sh-MKK4 group, the 99Tc-MDP+miR-145 inhibitor group could significantly promote HFLS-RA cell proliferation (P < 0.05) and increase the expression of inflammatory factors in the cells (P < 0.05). To conclude, 99Tc-MDP relieves osteoarthritis by inhibiting HFLS-RA cell-produced inflammatory factors via the downregulation of MKK4 by miR-145.


Key words:  , 99Tc-MDP, miR-145, MKK4, inflammatory factor, inflammation, synovial cells, osteoarthritis

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