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Neferine Inhibits Expression of Inflammatory Mediators and Matrix Degrading Enzymes in IL-1β-Treated Rat Chondrocytes via Suppressing MAPK and NF-κB Signaling Pathways.
Inflammation ( IF 4.5 ) Pub Date : 2020-06-02 , DOI: 10.1007/s10753-019-01143-6
Bowei Ni 1 , Xiaojian Huang 1 , Yang Xi 1 , Zekai Mao 1 , Xiangyu Chu 1 , Rui Zhang 1 , Xiaohu Ma 1 , Hongbo You 1
Affiliation  

Osteoarthritis (OA), in which inflammation plays a crucial role, is the most common joint disease characterized by cartilage degradation. Neferine (Nef), a dibenzyl isoquinoline alkaloid, has shown its anti-inflammatory effects on other inflammatory diseases. Therefore, we hypothesized that Nef might also have an anti-inflammatory effect on OA and explored its effect on IL-1β-treated rat chondrocytes. Sprague Dawley (SD) rat chondrocytes were stimulated with IL-1β (10 ng/ml) and Nef (1, 5, and 10 μM) or IL-1β (10 ng/ml) alone for 24 h. Expression of inducible nitric oxide synthase (iNOS), cyclooxygenase 2 (COX-2), matrix metalloproteinases (MMPs), and thrombospondin motifs-5 (ADAMTS5) was determined by quantitative real-time PCR and Western blotting. Expression of collagen II and aggrecan was examined by Western blotting, immunofluorescence, and safranin O staining. In addition, activation of MAPK and NF-κB signaling pathway was examined by Western blotting, and p65 nuclear translocation was evaluated by immunofluorescence. Nef reduced expression of inflammatory regulators (iNOS and COX-2) in IL-1β-treated chondrocytes. Expression of IL-1β-induced major catabolic enzymes (MMP3, MMP13, and ADAMTS5) was inhibited by Nef. Meanwhile, downregulation of collagen II and aggrecan expression was also ameliorated. Furthermore, Nef dampened abnormal activation of MAPK and NF-κB signaling pathway triggered by IL-1β. Overall, the results above showed that Nef inhibited IL-1β-induced excess production of inflammatory and catabolic factors in rat chondrocytes via inhibiting the MAPK and NF-κB pathways, suggesting a promising pharmacotherapy for OA.



中文翻译:

Neferine 通过抑制 MAPK 和 NF-κB 信号通路抑制 IL-1β 处理的大鼠软骨细胞中炎症介质和基质降解酶的表达。

骨关节炎(OA),其中炎症起着至关重要的作用,是最常见的以软骨退化为特征的关节疾病。Neferine (Nef) 是一种二苄基异喹啉生物碱,已显示出对其他炎症性疾病的抗炎作用。因此,我们假设 Nef 也可能对 OA 具有抗炎作用,并探讨其对 IL-1β 处理的大鼠软骨细胞的作用。Sprague Dawley (SD) 大鼠软骨细胞单独用 IL-1β (10 ng/ml) 和 Nef (1、5 和 10 μM) 或 IL-1β (10 ng/ml) 刺激 24 小时。诱导型一氧化氮合酶 (iNOS)、环氧合酶 2 (COX-2)、基质金属蛋白酶 (MMPs) 和血小板反应蛋白基序 5 (ADAMTS5) 的表达通过定量实时 PCR 和蛋白质印迹测定。通过蛋白质印迹、免疫荧光、和番红O染色。此外,通过Western印迹检查MAPK和NF-κB信号通路的激活,并通过免疫荧光评估p65核易位。Nef 降低了 IL-1β 处理的软骨细胞中炎症调节因子(iNOS 和 COX-2)的表达。Nef 抑制 IL-1β 诱导的主要分解代谢酶(MMP3、MMP13 和 ADAMTS5)的表达。同时,胶原蛋白II和聚集蛋白聚糖表达的下调也得到改善。此外,Nef 抑制了由 IL-1β 触发的 MAPK 和 NF-κB 信号通路的异常激活。总体而言,上述结果表明,Nef 抑制了 IL-1β 诱导的大鼠软骨细胞中炎症和分解代谢因子的过量产生 通过免疫荧光评估p65核易位。Nef 降低了 IL-1β 处理的软骨细胞中炎症调节因子(iNOS 和 COX-2)的表达。Nef 抑制 IL-1β 诱导的主要分解代谢酶(MMP3、MMP13 和 ADAMTS5)的表达。同时,胶原蛋白II和聚集蛋白聚糖表达的下调也得到改善。此外,Nef 抑制了由 IL-1β 触发的 MAPK 和 NF-κB 信号通路的异常激活。总体而言,上述结果表明,Nef 抑制了 IL-1β 诱导的大鼠软骨细胞中炎症和分解代谢因子的过量产生 通过免疫荧光评估p65核易位。Nef 降低了 IL-1β 处理的软骨细胞中炎症调节因子(iNOS 和 COX-2)的表达。Nef 抑制 IL-1β 诱导的主要分解代谢酶(MMP3、MMP13 和 ADAMTS5)的表达。同时,胶原蛋白II和聚集蛋白聚糖表达的下调也得到改善。此外,Nef 抑制了由 IL-1β 触发的 MAPK 和 NF-κB 信号通路的异常激活。总体而言,上述结果表明,Nef 抑制了 IL-1β 诱导的大鼠软骨细胞中炎症和分解代谢因子的过量产生 胶原蛋白 II 和聚集蛋白聚糖表达的下调也得到了改善。此外,Nef 抑制了由 IL-1β 触发的 MAPK 和 NF-κB 信号通路的异常激活。总体而言,上述结果表明,Nef 抑制了 IL-1β 诱导的大鼠软骨细胞中炎症和分解代谢因子的过量产生 胶原蛋白 II 和聚集蛋白聚糖表达的下调也得到了改善。此外,Nef 抑制了由 IL-1β 触发的 MAPK 和 NF-κB 信号通路的异常激活。总体而言,上述结果表明,Nef 抑制了 IL-1β 诱导的大鼠软骨细胞中炎症和分解代谢因子的过量产生通过抑制 MAPK 和 NF-κB 通路,表明一种有前途的 OA 药物疗法。

更新日期:2020-06-02
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