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Circulation:JAK-STAT信号抑制剂可抑制大中动脉血管炎的病理性免疫反应

2018-05-02 MedSci MedSci原创

巨细胞动脉炎是主动脉及其大分支的一种慢性自身免疫性疾病,可合动脉瘤形成、破裂和动脉闭塞。动脉壁树突细胞吸引CD4+T细胞和巨噬细胞形成原发性肉芽肿浸润。血管炎病灶里有各种各样的效应T细胞,对类固醇治疗耐受,并维持慢性血管炎。透壁性炎症可诱导微血管形成,导致闭塞性内膜增生。持续性血管壁炎症是否是由病变的T细胞(包括新鉴定的tissue-resident memory T[TRM]细胞)维持的?这类T

巨细胞动脉炎是主动脉及其大分支的一种慢性自身免疫性疾病,可合动脉瘤形成、破裂和动脉闭塞。动脉壁树突细胞吸引CD4+T细胞和巨噬细胞形成原发性肉芽肿浸润。血管炎病灶里有各种各样的效应T细胞,对类固醇治疗耐受,并维持慢性血管炎。透壁性炎症可诱导微血管形成,导致闭塞性内膜增生。

持续性血管壁炎症是否是由病变的T细胞(包括新鉴定的tissue-resident memory T[TRM]细胞)维持的?这类T细胞是否还对细胞因子信号抑制剂托法替尼(一种靶向JAK3和JAK1的JAK抑制剂)敏感?近日Circulation杂志上发表了一篇关于上述两个问题的最新研究。

研究人员用来源于人类巨噬细胞动脉炎的T细胞和单核细胞改造免疫缺陷的小鼠,移植人类动脉,并诱导移植动脉发生血管炎。用托法替尼或安慰剂处理移植炎性动脉的小鼠。通过基因表达、蛋白表达和浸润细胞数量检测动脉炎。

托法替尼可有效抑制血管壁的固有和获得性免疫。托法替尼可降低病灶T细胞的增殖速率(<10%),减少效应分子干扰素γ、白介素-17和白介素-21的产量。托法替尼可阻断外膜性微血管形成、减少内膜增生和CD4+CD103+的TRM细胞。

依赖JAK3和JAK1的细胞因子信号对大中动脉慢性炎症至关重要。JAK抑制剂托法替尼可有效抑制TRM细胞、抑制核心血管生成效应通路。

原始出处:

Hui Zhang, Ryu Watanabe,et al.Inhibition of JAK-STAT Signaling Suppresses Pathogenic Immune Responses in Medium and Large Vessel Vasculitis.Circulation. May 01,2018. https://doi.org/10.1161/CIRCULATIONAHA.117.030423

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    2019-04-16 jklm09
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    2018-05-04 cnxcy

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