医学分子生物学杂志 ›› 2024, Vol. 21 ›› Issue (2): 115-123.doi: 10.3870/j.issn.1672-8009.2024.02.004

• 论著 • 上一篇    下一篇

lncHAGLR 通过抑制 miR-26a 激活 NF-κB 促进骨关节炎大鼠软骨细胞的炎症反应和细胞凋亡 #br#

  

  1. 新疆维吾尔自治区人民医院骨科中心关节运动病区 乌鲁木齐市, 830001
  • 出版日期:2024-03-31 发布日期:2024-04-29
  • 基金资助:
    新疆维吾尔自治区自然科学基金 (No. 2022D01C507)

LncHAGLR Promotes Inflammatory Response and Apoptosis of Chondrocytes in Osteoarthritis Rats by Targeting miR-26a and Activation of NF-κB #br#

  1. Department of Joint Surgery and Sports Medicine, Orthopedic Center, Peoples Hospital of Xinjiang Uygur Autonomous Region, Urumqi, 830001, China
  • Online:2024-03-31 Published:2024-04-29

摘要: 目的 探讨长链非编码 RNA ( long non-coding RNA, lncRNA) HOXD 反义生长相关长链非编码RNA (HOXD antisense growth-associated long non-coding RNA, lncHAGLR) 对大鼠膝关节退行性软骨细胞C518 细胞的炎症反应和凋亡的作用与潜在机制 方法 采用 StarBase 和荧光素酶报告基因法预测和确认 lncHAGLR 和微小 RNA (microRNA, miR) -26a 之间的相互作用为研究 lncHAGLR miR-26a 表达的调控作用, C518 细胞分为沉默 lncHAGLR 的小干扰 RNA ( small interfering RNA, siRNA) 载体质粒 ( si-lncHAGLR) 、 siRNA 的阴性对照 (negative control of siRNA, si-NC) 、 miR-26a 抑制剂阴性对照 ( negative control of miR-26a inhibitor, inhibitor-NC) 、 miR-26a 的抑制剂 (miR-26a-inhibitor) 此外, 为研究lncHAGLR 是否通过调控 miR-26a C518 细胞的炎症和凋亡具有调控作用, C518 细胞分为 5 : Control白细胞介素 ( interleukin, IL) -1β 、 IL-1β + si-NC 、 IL-1β + si-lncHAGLR 组和 IL-1β + si-lncHAGLR + miR-26a-inhibitor 采用实时定量 PCR ( real-time quantitative PCR, qRT-PCR) 分析 lncHAGLR miR-26a 的水平采用四甲基偶氮唑蓝 ( methyl thiazolyl tetrazolium, MTT)、 乳酸脱氢酶 ( lactate dehydrogenase, LDH) 和流式细胞术 (flow cytometry, FCM) 检测 C518 细胞的增殖细胞毒性和凋亡情况蛋白质印迹检测切割模式的半胱天冬酶 3 (CLEAVED-CASPASE3)、 核因子 κB P65 ( nuclear factor-κB P65, NF- κB P65)、 磷酸化的 NF-κB P65 (phosphorylated NF-κB P65, P-NF-κB P65) 的表达。 ELISA 法检测白细胞介素 (interleukin, IL) -6 和肿瘤坏死因子 (tumor necrosis factor, TNF) -α 的释放 结果 lncHAGLR 直接靶向 miR-26a。 IL-1β , lncHAGLR 水平明显较 Control 组增高, miR-26a 水平较 Control 组降低 ( P< 0. 05)。 此外, IL-1β + si-lncHAGLR 组减轻了 IL-1β 诱导的 C518 细胞的炎症并抑制了凋亡, 而且细胞的活力增加, LDH 释放减少, CLEAVED-CASPASE3 的表达被抑制, TNF-α IL-6 的分泌减少, p-NF-κB P65表达减少 (P< 0. 05)。 IL-1β + si-lncHAGLR + miR-26a-inhibitor 组逆转了 IL-1β + si-lncHAGLR 组的结果(P< 0. 05)。 结论 lncHAGLR 通过抑制 miR-26a 激活 NF-κB 促进 C518 细胞的炎症反应和细胞凋亡, 表明 lncHAGLR 可能是治疗骨关节炎的一个有价值的靶点

关键词: lncHAGLR, 骨关节炎, C518 细胞, 细胞凋亡, miR-26a, NF-κB P65

Abstract: Objective To investigate the effect and potential mechanism of long non-codingRNA HAGLR on the inflammatory response and apoptosis of chondrocytes in rats with osteoarthritis. Methods  StarBase and luciferase gene reporter assay were used to predict and verify the interaction between lncHAGLR and miR-26a. To investigate the regulatory role of lncHAGLR on miR-26a expression, C518 cells were divided into 4 groups: si-lncHAGLR group, si-NC group, miR-26ainhibitor group, and inhibitor-NC group. Furthermore, to study whether lncHAGLR regulates in flammation and apoptosis in C518 cells by modulating miR-26a, C518 cells were divided into 5 groups: Control group, IL-1β group, IL-1β + si-NC group, IL-1β + si-lncHAGLR group, and IL-1β + si-lncHAGLR + miR-26a-inhibitor group. Real-time quantitative PCR ( qRT-PCR) was used to analyze the expression levels of lncHAGLR and miR-26a. The proliferation, cytotoxicity and apoptosis of C518 cells were detected by MTT, lactate dehydrogenase (LDH) Kit and flow cytometry (FCM). Western blotting assay was used to detect the protein expression levels of cleavedCASPASE3, NF-κB P65, and phosphorylated NF-κB P65 (P-NF-κB P65). The levels of releasedinflammatory factors (TNF-α and IL-6) were detected by ELISA. Results lncHAGLR directly targeted miR-26a. The expression level of lncHAGLR in the IL-1β group was significantly higher than that in the Control group, and the expression level of miR-26a was significantly lower than that inthe Control group (all P< 0. 05). In addition, cells in the IL-1β + si-lncHAGLR group had reducedIL-1β-induced chondrocyte inflammation, inhibited apoptosis, increased cell viabilities, decreased release of LDH, inhibited expression of cleaved-CASPASE3, and decreased secretions of TNF-αand IL-6 ( all P < 0. 05). Moreover, the expression level of P-NF-κB P65 was decreased (P<0. 05). Adding of miR-26a-inhibitor ( IL-1β + si-lncHAGLR + miR-26a-inhibitor group) reversedthe performances of cells in the IL-1β + si-lncHAGLR group (all P < 0. 05). Conclusion lncHAGLR promotes the inflammatory response and apoptosis of chondrocytes in osteoarthritis rats by inhibiting the activation of NF-κB through targeting miR-26a, suggesting that lncHAGLR may be avaluable therapeutic target for osteoarthritis treatment.

Key words: lncHAGLR, osteoarthritis, C518 cells, cell apoptosis, miR-26a, NF-κB P65

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