恒古骨伤愈合剂调节AGEs-RAGE通路抑制铁死亡改善
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1.昆明医科大学;2.云南省医疗器械检验研究院

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Osteoking regulates AGEs-RAGE pathway to inhibit ferroptosis and improve knee osteoarthritis
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1.Kunming Medical University;2.Yunnan Medical Device Inspection and Research Institute

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    摘要:

    目的? 探究恒古骨伤愈合剂(OK)调节铁死亡,改善骨关节炎的机制。 方法? 通过网络药理学分析OK、OA和铁死亡相关的靶基因,进行KEGG通路富集分析。体内实验使用内侧半月板失稳术构建大鼠膝关节炎(KOA)模型,设置假手术组(sham组)、模型组(DMM)和恒古骨伤愈合剂组(OK),按照分组情况灌胃相应的药物8周。用热板仪、压力测痛仪分别记录各组大鼠的缩爪反应时间(s)和所承受的砝码重量(g)。 ELISA试剂盒检测大鼠血清炎性因子TNF-α、VEGF、IL-6和氧化应激因子MDA、SOD、GSH、ROS。伊红-苏木精、番红-固绿和甲苯胺蓝染色大鼠膝关节,并依OARSI 标准对软骨组织退变程度评分。Western blot检测大鼠细骨关节软骨的细胞外基质降解蛋白(MMP13)、软骨基质合成蛋白2(COLA2)、谷胱甘肽过氧化物酶4(GPX4)、溶质载体家族7成员11(SLC)、晚期糖基化终产物(AGE)和及其受体(RAGE)蛋白的表达。采用10 mg/L的 IL-1β 诱导人C28/I2细胞模拟关节炎体外模型,分对照组(control)、模型组( IL-1β)、OK组、OK + AGEs组。ELISA试剂盒检测细胞上清液炎性因子IL-6和氧化应激因子MDA、SOD、GSH。细胞专用Fe2+试剂盒检测各组细胞的含量。Western blot检测MMP13、COLA2、GPX4、SLC11蛋白。结果 网络药理学分析发现AGE-RAGE信号通路等可能是OK作用于骨关节炎和铁死亡的关键通路。动物实验中,模型组大鼠压痛(P< 0.01)、热痛值(P< 0.01)和OARSI评分(P< 0.001)显著升高,膝关节软骨面和软骨基质损伤。与模型组比较,OK显著降低大鼠的压痛、热痛和OARSI评分值(P< 0.01),缓解膝关节软骨面和软骨基质损伤。与模型组相比,OK组关节软骨COLA2、GPX4、SLC11蛋白的表达显著增加(P< 0.1),而MMP13(P< 0.1)、AGEs(P< 0.01)及受体RAGE(P< 0.01)的表达降低。OK组血清TNF-α、VEGF、IL-6、MDA、ROS显著降低(P< 0.01),SOD和GSH升高(P< 0.01)。细胞实验中,IL-1β组的MDA(P < 0.05)、IL-6和Fe2+升高(P < 0.01),GSH(P < 0.05)和SOD水平降低(P < 0.01);MMP13蛋白水平升高(P < 0.05),而COLA2、GPX4和SLC11(P < 0.01)蛋白水平降低。OK干预逆转以上结果,改善氧化应激和软骨细胞代谢平衡,降低炎性因子和铁负荷及铁死亡。而AGEs消弱了OK的作用,相关指标具有统计学意义。此外,OK进一步增强铁死亡抑制剂Fer-1对C28/I2细胞的抗炎、抗氧化应激,改善代谢平衡的作用。结论? OK能够通过AGEs-RAGE轴抑制铁死亡,保护关节软骨,进而发挥抗关节炎的作用。

    Abstract:

    Objective To explore the mechanism by which osteoking (OK) regulates ferroptosis and improves osteoarthritis. Method: Perform KEGG pathway enrichment analysis by analyzing target genes related to OK, OA, and ferroptosis through network pharmacology. In vivo experiments were conducted using medial meniscus instability surgery to construct a rat model of knee osteoarthritis (KOA). A sham surgery group (sham group), a model group (DMM), and osteoking group (OK) were set up, and corresponding drugs were administered orally for 8 weeks according to the grouping. Record the paw contraction reaction time (s) and weight (g) of each group of rats using a hot plate apparatus and a pressure pain gauge, respectively. ELISA kit was used to detect serum inflammatory factors TNF-α, VEGF, IL-6 and oxidative stress factors MDA, SOD, GSH, ROS in rats. Stain the knee joints of rats with eosin hematoxylin, safranin turquoise, and toluidine blue, and score the degree of cartilage tissue degeneration according to the OARSI standard. Western blot was used to detect the expression of extracellular matrix degradation protein 13(MMP13), cartilage matrix synthesis protein 2 (COLA2), glutathione peroxidase 4 (GPX4), solute carrier family 7 member 11 (SLC), advanced glycation end products (AGE), and their receptor (RAGE) proteins in rat cartilage. Using 10 mg/L IL-1β to induce human C28/I2 cells to simulate an in vitro model of arthritis, the cells were divided into control group, model group (IL-1β), OK group, and OK+AGEs group.ELISA kit was used to detect the inflammatory factor IL-6 and oxidative stress factors MDA, SOD, and GSH in the cell supernatant. Cell specific Fe2+assay kit was used to detect the content of each group of cells. Western blot was used to detect MMP13, COLA2, GPX4, and SLC11 proteins. Results The network pharmacology analysis revealed that AGE-RAGE signaling pathway and other pathways may be key pathways for OK to act on osteoarthritis and ferroptosis. In animal experiments, the model group rats showed significant increases in tenderness (P<0.01), thermal pain value (P<0.01), and OARSI score (P<0.001), as well as damage to the cartilage surface and cartilage matrix of the knee joint. Compared with the model group, OK significantly reduced tenderness, thermal pain, and OARSI scores in rats (P<0.01), alleviating damage to the cartilage surface and cartilage matrix of the knee joint. Compared with the model group, the expression of COLA2, GPX4, and SLC11 proteins in the articular cartilage of the OK group significantly increased (P<0.1), while the expression of MMP13 (P<0.1), AGEs (P<0.01), and receptor RAGE (P<0.01) decreased. The serum levels of TNF-α, VEGF, IL-6, MDA, and ROS in the OK group were significantly reduced (P<0.01), while SOD and GSH increased (P<0.01). In cell experiments, the levels of MDA (P<0.05), IL-6, and Fe2+increased in the IL-1 β group (P<0.01), while the levels of GSH (P<0.05) and SOD decreased (P<0.01); The protein levels of MMP13 increased (P<0.05), while the protein levels of COLA2, GPX4, and SLC11 decreased (P<0.01). OK intervention reverses the above results, improves oxidative stress and chondrocyte metabolic balance, reduces inflammatory factors, iron load, and ferroptosis. AGEs weakened the effect of OK, and the relevant indicators had statistical significance. In addition, OK further enhances the anti-inflammatory and antioxidant stress effects of ferroptosis inhibitor Fer-1 on C28/I2 cells, and improves metabolic balance. Conclusion OK can inhibit ferroptosis and protect articular cartilage through the AGEs-RAGE axis, thereby exerting anti arthritis effects.

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  • 收稿日期:2025-06-18
  • 最后修改日期:2025-07-11
  • 录用日期:2025-11-05
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