中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (4): 499-504.doi: 10.12307/2024.323

• 软骨组织构建 cartilage tissue construction • 上一篇    下一篇

敲低环状RNA WD重复含蛋白1抑制膝骨关节炎软骨细胞增殖并诱导凋亡

申飞燕1,姚吉祥2,苏珊珊2,赵忠民2,唐巍东3   

  1. 1长春中医药大学中西医结合学院,吉林省长春市  130000;2泰州市人民医院疼痛科,江苏省泰州市  225300;3江苏省钟山康复医院,江苏省南京市  210014
  • 收稿日期:2023-03-11 接受日期:2023-05-19 出版日期:2024-02-08 发布日期:2023-07-13
  • 通讯作者: 赵忠民,博士,副主任医师,泰州市人民医院疼痛科,江苏省泰州市 225300
  • 作者简介:申飞燕,女,1995年生,河南省汝阳县人,汉族,2023年长春中医药大学毕业,硕士,主要从事中西医结合临床骨科疾病研究。
  • 基金资助:
    江苏省干部保健科研课题(BJ18038),项目负责人:唐巍东

Knockdown of circRNA WD repeat containing protein 1 inhibits proliferation and induces apoptosis of chondrocytes in knee osteoarthritis

Shen Feiyan1, Yao Jixiang2, Su Shanshan2, Zhao Zhongmin2, Tang Weidong3   

  1. 1College of Integrated Chinese and Western Medicine, Changchun University of Chinese Medicine, Changchun 130000, Jilin Province, China; 2Department of Pain, Taizhou People’s Hospital, Taizhou 225300, Jiangsu Province, China; 3Jiangsu Zhongshan Rehabilitation Hospital, Nanjing 210014, Jiangsu Province, China
  • Received:2023-03-11 Accepted:2023-05-19 Online:2024-02-08 Published:2023-07-13
  • Contact: Zhao Zhongmin, MD, Associate chief physician, Department of Pain, Taizhou People’s Hospital, Taizhou 225300, Jiangsu Province, China
  • About author:Shen Feiyang, Master, College of Integrated Chinese and Western Medicine, Changchun University of Chinese Medicine, Changchun 130000, Jilin Province, China
  • Supported by:
    Jiangsu Cadre Health Research Project, No. BJ18038 (to TWD)

摘要:


文题释义:

环状RNA (circRNA):是一类特殊的非编码RNA分子,也是近年非编码RNA领域研究的热点和重点;其在真核生物内广泛表达,circRNA环状共价闭合结构,没有5′帽子结构和3′polyA尾巴,是反向间接形成,不受RNA外切酶影响,稳定性良好,且大多数circRNA位于细胞质。
miRNA:是一种内源性非编码RNA分子,由22-25个核苷酸组成的小分子RNA,circRNA可与miRNA竞争结合,并充当miRNA海绵,进而解除miRNA下游靶基因mRNA表达抑制作用,针对以上作用机制称为竞争性内源RNA机制。近年研究已证实,circRNA/miRNA/mRNA轴在多种疾病、恶性肿瘤中发挥着重要调控作用。


背景:环状RNA(circular RNA,circRNA)在多种疾病或肿瘤中发挥着重要作用,近年研究结果发现,膝骨关节炎中circRNA失常表达,并可通过调控微小RNA(miRNA)/mRNA参与疾病进展。

目的:探究circ-BRWD1/miR-488-3p/DNMT3A对膝骨关节炎软骨细胞增殖和凋亡的影响。
方法:实时荧光定量PCR检测膝骨关节炎软骨细胞miR-488-3p、circ-BRWD1、DNMT3A表达。将细胞分为si-NC组、si-circ-BRWD1组、si-circ-BRWD1+anti-miR-NC组、si-circ-BRWD1+anti-miR-488-3p组、vector组、circ-BRWD1组、miR-NC组、miR-488-3p组、miR-488-3p+vector组、miR-488-3p+DNMT3A组、anti-miR-NC组、anti-miR-488-3p组;实时荧光定量PCR检测circ-BRWD1、miR-488-3p、DNMT3A表达,MTT、流式细胞术检测增殖和凋亡,Western blot检测DNMT3A、增殖、凋亡相关蛋白表达;双荧光素酶报告实验检测circ-BRWD1与miR-488-3p、miR-488-3p与DNMT3A的靶向关系。
结果与结论:①与正常软骨细胞相比,circ-BRWD1、DNMT3A在膝骨关节炎软骨细胞中高表达,miR-488-3p低表达;②敲低circ-BRWD1或过表达miR-488-3p可抑制膝骨关节炎软骨细胞增殖并诱导凋亡;③circ-BRWD1靶向负调控miR-488-3p,抑制miR-488-3p可逆转敲低

circ-BRWD1对膝骨关节炎软骨细胞增殖、凋亡的影响;④miR-488-3p靶向负调控DNMT3A,上调DNMT3A可逆转过表达miR-488-3p对膝骨关节炎软骨细胞增殖、凋亡的影响;⑤circ-BRWD1可通过调控miR-488-3p进而调控DNMT3A的表达;⑥结果表明,敲低circ-BRWD1可抑制膝骨关节炎软骨细胞增殖并诱导凋亡,其作用机制可能与调控miR-488-3p/DNMT3A轴有关。

https://orcid.org/0009-0006-9400-859X(申飞燕)

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: circ-BRWD1, miR-488-3p, DNMT3A, 膝骨关节炎, 软骨细胞, 增殖, 凋亡

Abstract: BACKGROUND: Circular RNAs (circRNAs) play important roles in a variety of diseases or tumors, and recent findings have revealed that circRNAs are abnormally expressed in knee osteoarthritis and are involved in disease progression through microRNA/mRNA regulation.
OBJECTIVE: To investigate the effect of circRNA WD repeat containing protein 1 (circ-BRWD1)/miR-488-3p/DNA methyltransferase 3A (DNMT3A) on the proliferation and apoptosis of chondrocytes in knee osteoarthritis.
METHODS: Real-time fluorescence quantitative PCR was performed to detect the expression of circ-BRWD1, miR-488-3p, DNMT3A in knee osteoarthritis chondrocytes. Cells were divided into si-NC group, si-circ-BRWD1 group, vector group, circ-BRWD1 group, si-circ-BRWD1+anti-miR-NC group, si-circ-BRWD1+anti-miR-488-3p group, miR-NC group, miR-488-3p group, anti-miR-NC group, anti-miR-488-3p group, miR-488-3p+vector group, miR 488-3p+DNMT3A group. Real-time fluorescence quantitative PCR was used to detect circ-BRWD1, miR-488-3p, DNMT3A expression, MTT and flow cytometry assay were used to detect cell proliferation and apoptosis. Western blot assay was used to detect DNMT3A and proliferation/apoptosis-related protein expression. Dual luciferase reporter assay was used to Dual luciferase reporter assay to detect the targeting relationship of circ-BRWD1 with miR-488-3p and miR-488-3p with DNMT3A.
RESULTS AND CONCLUSION: circ-BRWD1 and DNMT3A were highly expressed and miR-488-3p was lowly expressed in knee osteoarthritis chondrocytes compared with normal chondrocytes. Knockdown of circ-BRWD1 or overexpression of miR-488-3p inhibited proliferation and induced apoptosis in knee osteoarthritis chondrocytes. circ-BRWD1 targeted negative regulation of miR-488-3p and inhibition of miR-488-3p reversed the effect of circ-BRWD1 knockdown on chondrocyte proliferation and apoptosis in knee osteoarthritis. miR-488-3p targeted negative regulation of DNMT3A and upregulation of DNMT3A reversed the effect of miR-488-3p overexpression on chondrocyte proliferation and apoptosis in knee osteoarthritis. circ-BRWD1 could regulate the expression of DNMT3A by regulating miR-488-3p. To conclude, knockdown of circ-BRWD1 inhibits chondrocyte proliferation and induces apoptosis in knee osteoarthritis, and the mechanism of action may be related to the regulation of miR-488-3p/DNMT3A axis.

Key words: circ-BRWD1, miR-488-3p, DNMT3A, knee osteoarthritis, chondrocyte, proliferation, apoptosis

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