中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (33): 5320-5325.doi: 10.12307/2024.653

• 数字化骨科 digital orthopedics • 上一篇    下一篇

miR-34a-5p/PLCD3轴调控骨关节炎进展的机制

应  璞,许  岳,路  通,薛  燚,缪逸鸣   

  1. 南京中医药大学常熟附属医院,江苏省常熟市   215500
  • 收稿日期:2023-08-14 接受日期:2023-10-12 出版日期:2024-11-28 发布日期:2024-01-30
  • 通讯作者: 缪逸鸣,主任医师,南京中医药大学常熟附属医院骨科,江苏省常熟市 215500
  • 作者简介:应璞,男,1988年生,江苏省常熟市人,汉族,博士,副主任医师,主要从事关节外科临床与基础研究。
  • 基金资助:
    苏州市科技发展计划指导性项目(SKJYD2021007),项目负责人:应璞;苏州市科技发展计划指导性项目(SKJYD2021202),项目负责人:缪逸鸣;苏州市“科教兴卫”青年科技项目(KJXW2020068),项目负责人:应璞;常熟市卫健委科技计划项目资助性重点项目(CSWS202118),项目负责人:应璞;南京中医药大学常熟附属医院课题(cszyy201910),项目负责人:应璞

Mechanism by which miR-34a-5p/PLCD3 axis regulates osteoarthritis progression

Ying Pu, Xu Yue, Lu Tong, Xue Yi, Miao Yiming   

  1. Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu 215500, Jiangsu Province, China
  • Received:2023-08-14 Accepted:2023-10-12 Online:2024-11-28 Published:2024-01-30
  • Contact: Miao Yiming, Chief physician, Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu 215500, Jiangsu Province, China
  • About author:Ying Pu, MD, Associate chief physician, Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu 215500, Jiangsu Province, China
  • Supported by:
    Suzhou Science and Technology Development Plan Guiding Project, No. SKJYD2021007 (to YP); Suzhou Science and Technology Development Plan Guiding Project, No. SKJYD2021202 (to MYM); Suzhou “Science, Education and Health” Youth Science and Technology Project, No. KJXW2020068 (to YP); Key Project of Changshu Municipal Health Commission Science and Technology Plan, No. CSWS202118 (to YP); a grant from Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, No. cszyy201910 (to YP)

摘要:


文题释义:

miR-34a-5p:作为一种非编码miRNA,是真核生物中广泛存在的一种RNA分子,可调节其他基因的表达,通过与靶信使核糖核酸(mRNA)特异结合,从而抑制转录后基因表达,在调控基因表达、调节细胞稳态等方面起重要作用。
miRNA/mRNA轴:是指两者之间的相互作用关系。miRNA通过与mRNA结合来调控基因表达,可以导致mRNA的降解或抑制其翻译。miRNA/mRNA轴在许多生物学过程中起着重要的调控作用,包括细胞增殖、分化、凋亡等。


背景:目前已有针对miRNA/mRNA轴调节骨关节炎疾病进程的分子机制研究。先前生物信息学研究发现具有临床预测价值的mRNA(磷脂酶Cδ3:phospholipase C delta 3,PLCD3)及其靶向miRNA(miR-34a-5p),尚缺实验验证其调控骨关节炎的具体作用及机制。

目的:探讨miR-34a-5p/PLCD3轴对骨关节炎进展的调控作用及机制。
方法:选择15例膝骨关节炎患者的滑膜为骨关节炎组,同时选择同期因创伤致髌骨骨折行内固定术的15例年轻患者的健康滑膜为对照组,Real-time PCR法检测滑膜中PLCD3及miR-34a-5p的表达。通过细胞转染的方法,将人滑膜关节炎成纤维细胞(human fibroblast like synovial cells-osteoarthritis,HFLS-OA)进行处理,并分为miR-34a-5p模拟物组、pCDH-PLCD3组、miR-34a-5p模拟物+pCDH-PLCD3组、miR-34a-5p抑制剂组、si-PLCD3组、miR-34a-5p抑制剂+si-PLCD3组,通过Real-time PCR法检测PLCD3和miR-34a-5p表达的关系;通过CCK-8法、细胞划痕实验检测各组HFLS-OA细胞活力及细胞迁移的影响;使用Western Blot法检测凋亡标记蛋白表达水平;使用ELISA法检测炎症因子的表达。

结果与结论:①PLCD3是miR-34a-5p的直接靶标,同时PLCD3和miR-34a-5p表达水平呈负相关。②PLCD3上调会促进HFLS-OA细胞的增殖并抑制细胞迁移,而miR-34a-5p上调会显著抑制HFLS-OA细胞的活性并增强细胞迁移;miR-34a-5p过表达使HFLS-OA细胞Casp3和Casp9蛋白水平显著升高,而PLCD3过表达则表现出相反趋势。③PLCD3过表达显著增加了HFLS-OA细胞白细胞介素6和肿瘤坏死因子α的表达,而miR-34a-5p模拟物则表现出保护活性。④结果说明,miR-34a-5p/PLCD3轴可能通过调节滑膜细胞的炎症过程或凋亡来影响骨关节炎的进展。

https://orcid.org/0000-0003-3975-6326 (应璞)

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 骨关节炎, 滑膜, miR-34a-5p, 磷脂酶Cδ3, PLCD3, 白细胞介素6, 肿瘤坏死因子α

Abstract: BACKGROUND: Molecular mechanisms targeting the miRNA/mRNA axis to regulate osteoarthritis disease process have been studied. We identified the mRNA: phospholipase C delta 3 (PLCD3) and its target miRNA(miR-34a-5p) with clinical predictive value through previous bioinformatics studies, while experiments to verify their specific roles and mechanisms in regulating osteoarthritis are still lacking.
OBJECTIVE: To investigate the regulatory role and mechanism of miR-34a-5p/PLCD3 axis on osteoarthritis progression. 
METHODS: The synovium of 15 patients with knee osteoarthritis was selected as the osteoarthritis group, and the synovium of 15 young patients with internal fixation of patellar fracture caused by trauma during the same period was selected as the control group. The expression of PLCD3 and miR-34a-5p in the synovium was detected by real-time PCR. Human fibroblast like synovial cells-osteoarthritis (HFLS-OA) cells were treated by cell transfection and divided into miR-34a-5p mimic group, pCDH-PLCD3 group, miR-34a-5p mimic+pCDH-PLCD3 group, miR-34a-5p inhibitor group, si-PLCD3 group, and miR-34a-5p inhibitor+si-PLCD3 group. The relationship between PLCD3 and miR-34a-5p expression was detected by real-time PCR. The effects of HFLS-OA cell viability and cell migration in each group were detected by CCK-8 assay and cell scratch test. Western blot assay was used to detect the expression level of apoptosis marker protein. The expression of inflammatory factors was detected by ELISA.
RESULTS AND CONCLUSION: (1) PLCD3 was a direct target of miR-34a-5p, and the expression levels of PLCD3 and miR-34a-5p were negatively correlated. (2) Upregulation of PLCD3 promoted proliferation of HFLS-OA cells and inhibited cell migration. The up-regulation of miR-34a-5p significantly inhibited the activity of HFLS-OA cells and enhanced cell migration. Overexpression of miR-34a-5p significantly increased the levels of Casp3 and Casp9 proteins in HFLS-OA cells, while overexpression of PLCD3 showed the opposite trend. (3) PLCD3 overexpression significantly increased the expression of interleukin 6 and tumor necrosis factor alpha in HFLS-OA cells, while miR-34a-5p mimics showed protective activity. (4) The miR-34a-5p/PLCD3 axis may affect the progression of osteoarthritis by regulating the inflammatory process or apoptosis of synovial cells.

Key words: osteoarthritis, synovial membrane, miR-34a-5p, phospholipase Cδ3, PLCD3, interleukin 6, tumor necrosis factor alpha

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