NKG2D受体激活致CD患者的CD4+T细胞产生Th17

2011-08-08 蔡春晓 医学论坛网

  最近,法国学者Benjamin Pariente等研究发现,受T细胞受体(TCR)和自然杀伤组2成员D(NKG2D)共刺激的克罗恩病(CD)患者具有能产生白介素(IL)-17的CD4+ T细胞,NKG2D为该细胞的功能性标志;阻断NKG2D的试剂有可能减轻CD患者的胃肠炎症。相关研究发表于《胃肠病学》(Gastroenterology)杂志上。   NKG2D是一种表达于CD及别的炎症性疾病

  最近,法国学者Benjamin Pariente等研究发现,受T细胞受体(TCR)和自然杀伤组2成员D(NKG2D)共刺激的克罗恩病(CD)患者具有能产生白介素(IL)-17的CD4+ T细胞,NKG2D为该细胞的功能性标志;阻断NKG2D的试剂有可能减轻CD患者的胃肠炎症。相关研究发表于《胃肠病学》(Gastroenterology)杂志上。

  NKG2D是一种表达于CD及别的炎症性疾病患者的某个黏膜亚群和外周血CD4+ T细胞上的刺激性受体。患者NKG2D被配体激活后,导致CD4+ T释放辅助性T(Th)1细胞因子以及成为细胞毒性T细胞。Benjamin Pariente等研究了CD患者中血及肠道黏膜样本中T细胞产生的表达NKG2D 的Th17细胞因子。

  研究人员从CD或溃疡性结肠炎(UC)患者以及健康个体(对照)的外周血和固有层样本中,分离了CD4+ T细胞;分析了CD4+NKG2D+ T细胞以及它们由于NKG2D刺激所产生的反应性细胞因子的表型和功能。

  CD患者的表达NKG2D的CD4+ T细胞,产生高水平的IL-17和IL-22,并表达高水平的CCR6,IL-23受体,CD161,和RORC(一种调节Th17细胞因子表达的转录因子)。产生IL-17的CD4+ T细胞表达高水平的NKG2D和CD161。NKG2D和TCR的共刺激,与TCR的单独活化相比,显著提高了由CD4+ T细胞产生的IL-17和肿瘤坏死因子α。CD4+NKG2D+ T细胞还对Th17的极化作出反应。

  相关内容:Activation of the Receptor NKG2D Leads to Production of Th17 Cytokines in CD4+ T Cells of Patients With Crohn's Disease

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    2012-06-20 xuyu
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    2011-08-12 qidongfanjian
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    2011-08-10 zhaojie88
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