TIGIT在自身免疫性肝炎免疫机制中的作用及治疗前景
DOI: 10.3969/j.issn.1001-5256.2022.03.034
利益冲突声明:所有作者均声明不存在利益冲突。
作者贡献声明:韩琳、张明月负责资料分析,撰写论文;孙颖负责拟定写作思路,指导撰写文章并最后定稿。
Role of T-cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif domain in the immune mechanism of autoimmune hepatitis and its prospects in treatment
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摘要: 免疫耐受失衡在自身免疫性肝炎(AIH)的发病过程中发挥关键作用。免疫调节性T淋巴细胞(Treg)的共抑制信号分子表达异常可能是导致自身抗原耐受性破坏的重要原因之一。共抑制信号分子T淋巴细胞免疫球蛋白和免疫受体酪氨酸抑制基序结构域(TIGIT)是一种主要表达在Treg上的抑制性受体。本文阐述了Treg与AIH相关的免疫机制以及TIGIT在自身免疫性疾病发生、发展及治疗中的作用,以寻找TIGIT作为AIH候选靶点的治疗策略。
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关键词:
- 肝炎, 自身免疫性 /
- 治疗学 /
- T淋巴细胞免疫球蛋白和免疫受体酪氨酸抑制基序结构域
Abstract: The imbalance of immune tolerance plays a key role in the pathogenesis of autoimmune hepatitis (AIH), and the abnormal expression of coinhibitory signal molecules for regulatory T cells (Treg) may be one of the important reasons for the destruction of autoantigen tolerance. As a coinhibitory signal molecule, T-cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif domain (TIGIT) is an inhibitory receptor mainly expressed on Treg. This article elaborates on the immune mechanism of Treg associated with AIH and the role of TIGIT in the development, progression, and treatment of autoimmune diseases, so as to find the treatment strategy with TIGIT as the candidate target for AIH.-
Key words:
- Hepatitis, Autoimmune /
- Therapeutics /
- TIGIT
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表 1 Treg及TIGIT与自身免疫性肝病治疗的相关研究
研究内容 作者 年份 研究对象 例数 细胞类型 研究结果 Treg频率与AIH疾病活动的关系研究 Longhi等[18] 2004 AIH患者 41 Treg AIH疾病活动期患者Treg频率显著低于缓解期 Taubert等[19] 2014 1型AIH患者 76 Treg 1型AIH患者获得生化缓解者,其肝内Treg/Teff和Treg/B淋巴细胞比率较未缓解患者更高 基于恢复Treg功能的AIH治疗研究 Buitrago-Molina等[20] 2021 AIH小鼠模型 Treg 在AIH疾病晚期阶段给予IL-2/抗-IL-2复合物治疗,经过治疗后的小鼠模型肝内和全身Treg数量增加,肝内激活的Teff减少 Lapierre等[21] 2013 2型AIH
小鼠模型Treg 在AIH的小鼠体内过继转移体外扩增的CXCR3+Treg,可有效靶向肝脏炎症,诱导AIH的缓解 Xia等[22] 2018 AIH小鼠模型 Treg/ Th17 ConA诱导的AIH小鼠模型,经antagomir-155处理后,其ALT、AST和ALP显著下降,antagomir-155可通过调节Treg和Th17的分化来预防AIH Hardtke-Wolenski等[23] 2015 AIH小鼠模型 5 Treg 对AIH模型小鼠进行特异性Treg的过继治疗,结果发现特异性Treg过继治疗的AIH模型小鼠肝脏可获得组织学缓解 Longhi等[24] 2011 2型AIH患者 17 Treg 从2型AIH患者中获得CYP2D6特异性Treg,当其与半成熟树突状细胞共培养时,Treg能够发挥高效抑制自身反应性T淋巴细胞的作用 Vuerich等[25] 2021 AIH患者 49 Treg/ Th17 在AIH患者中,芳香烃受体途径的功能障碍能够影响Treg和Th17诱导细胞表面酶CD39的表达,导致Treg抑制功能缺陷,阻断这些抑制性和/或非典型芳香烃受体途径可恢复Treg和Th17的功能失衡 TIGIT与自身免疫性肝病的相关研究 Deng等[12] 2020 PBC患者 42 TIGIT+ CD8+
T淋巴细胞在PBC患者中CD8+TIGIT+ T淋巴细胞频率与肝功能损伤程度呈负相关,TIGIT高表达时可抑制CD226+CD8+T淋巴细胞亚群活性,有助于缓解疾病的活动状态 Akiyama等[13] 2021 IgG4相关疾病
患者23 TIGIT+Tfh 外周血TIGIT+Tfh通过OX40途径促进IL-21的分泌,TIGIT+Tfh频率与疾病活动相关 TIGIT与自身免疫性疾病治疗的研究 Liu等[11] 2019 狼疮小鼠模型 60 TIGIT-Ig 经TIGIT-Ig融合蛋白腹腔注射的狼疮小鼠模型,发生蛋白尿的时间推迟,自身抗体(如抗核抗体)的血清浓度降低,存活率显著提高 -
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