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中国临床药理学与治疗学 ›› 2014, Vol. 19 ›› Issue (12): 1347-1351.

• 基础研究 • 上一篇    下一篇

甲氨蝶呤对炎性细胞因子及丝裂原活化蛋白激酶信号通路的影响

蔡质其1, 张育2, 张学增3, 沈维干2   

  1. 1扬州文峰社区卫生服务中心,扬州 225003,江苏;
    2扬州大学临床医学院,扬州 225001,江苏;
    3山东省青岛卫生学校,青岛 266071,山东
  • 收稿日期:2014-04-02 修回日期:2014-08-21 发布日期:2020-07-20
  • 通讯作者: 张育,通信作者,男,主任医师,教授,研究方向:炎性关节病的基础与临床研究。Tel:0514-7978805 E-mail:yzzy10182001@aliyun.com
  • 作者简介:蔡质其,男,副主任医师,研究方向:脊柱关节病变的基础与临床研究。Tel:13013708518 E-mail:377586392@qq.com

Study on the effect of methotrexate on inflammatory cytokines and MAPK signal pathway

CAI Zhi-qi1, ZHANG Yu2, ZHANG Xue-zeng3, SHEN Wei-gan1   

  1. 1Wenfeng Community Health Service Center of Yangzhou, Yangzhou 225003, Jiangsu, China;
    2Clinic Medical College of Yangzhou University, Yangzhou 225001, Jiangsu, China;
    3Qingdao Health School, Qingdao 266071, Shandong, China
  • Received:2014-04-02 Revised:2014-08-21 Published:2020-07-20

摘要: 目的: 探讨甲氨蝶呤(methotrexate,MTX)对类风湿关节炎(RA)发病起重要作用的炎性细胞因子IL-1β和TNF-α的作用及其可能的机制。方法: 用II型胶原建立类风湿关节炎(CIA)动物模型,以MTX(0.2 mg/kg/W)进行处理,6周后处死大鼠,取血清进行IL-1β和TNF-α检测;分离大鼠膝关节取关节滑膜细胞(FLS)进行培养、鉴定,检测脂多糖(LPS)诱导的FLS培养上清中IL-1β和TNF-α的含量,并观察MTX对FLS分泌IL-1β和TNF-α的影响;在FLS的培养中加入不同剂量的MTX,用Westen Blot方法检测FLS中ERK蛋白及磷酸化蛋白的表达。结果: 关节炎指数评分、关节肿胀度测定及关节病理显示造模成功,分离关节滑膜细胞经流式细胞仪检测FLS的血管细胞黏附分子-1(VCAM-1)的表达为 85.5%。造模后,CIA大鼠血清IL-1β和TNF-α明显增加,与空白对照组比较有统计学差异(P<0.05),MTX能有效减少CIA大鼠血清中IL-1β和TNF-α的含量(P<0.05),但未能恢复至正常水平。MTX能抑制LPS诱导的CIA大鼠关节FLS分泌IL-1β和TNF-α。Western Blot检测显示,不同浓度的MTX对CIA大鼠FLS中ERK蛋白的表达与模型对照组相比无统计学差异(P>0.05)。CIA大鼠 FLS中p-ERK蛋白的表达明显高于空白对照组(P<0.01),MTX干预后,低剂量组对p-ERK蛋白表达无明显影响,而中、高剂量组可降低p-ERK蛋白的表达(P<0.05)。结论: MTX既有免疫抑制作用,同时还通过抑制炎性细胞因子IL-1β和TNF-α而具有抗炎作用,其机制可能部分与其抑制MAPK信号通路中的ERK蛋白磷酸化有关。

关键词: 类风湿关节炎, 甲氨蝶呤, IL-1β, TNF-α, ERK/p-ERK

Abstract: AIM: To observe the role and its possible mechanism of inflammatory cytokines of IL-1 β and TNF α which plays an important role in the etiology of MTX on RA. METHODS: The establishment of animal model of rheumatoid arthritis with collagen type II, with MTX (0.2 mg/kg/W) treatment, the rats were killed after six weeks, serum for detection of IL-1β and TNF-α; separation of knee joint synovial cells in rats (FLS) were cultured, identification,detection of LPS induced FLS in the culture supernatant of IL-1β and TNF -α, and observes the effect of MTX on the secretion of IL-1β and TNF-α of FLS; adding different doses of MTX on the FLS culture, expression by Western Blot method for detection of FLS ERK protein and phosphorylation of protein. RESULTS: Arthritis index score and joint swelling and joint pathology showed determination modeling success, isolated synovial cells by flow cytometry FLS expression of VCAM-1 was 85.5%. After modeling, CIA rat serum IL-1 β and TNF- α increased obviously, there was significant difference compared with the blank control group (P<0.05), MTX could effectively reduce the content of serum CIA in rats of IL-1 β and TNF -α (P<0.05), but failed to recover to normal.In rats with CIA FLS MTX could inhibit LPS induced secretion of IL-1 β and TNF-α. Displayed in Western Blot detection, different concentrations of MTX on ERK protein expression of FLS in CIA rats compared with the model group showed no significant difference (P>0.05). Expression of p-ERK CIA in FLS of rats was significantly higher than that in control group (P<0.01), after the treatment of MTX, low dose group had no effect on the expression of p-ERK protein, while in the medial and high dose group could reduce the p-ERK protein (P<0.05). CONCLUSION: MTX has immunosuppressive effects at the same time through the inhibition of inflammatory cytokines IL-1 β and TNF -α, it also has anti-inflammatory effect. The mechanism may be partly related to inhibition of MAPK signaling pathway in ERK phosphorylation relate.

Key words: rheumatoid arthritis, methotrexate, IL-1β, TNF-α, ERK/p-ERK

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