Human interleukin-2 receptor β mutations associated with defects in immunity and peripheral tolerance

Human interleukin-2 receptor β mutations associated with defects in immunity and peripheral tolerance
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人白细胞介素 2 受体 β 突变与免疫和外周耐受缺陷相关

DOI:
10.1084/jem.20182304
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发表时间:
2019
期刊:
The Journal of Experimental Medicine
影响因子:
--
通讯作者:
Engelha
Engelha
中科院分区:
--
文献类型:
--
作者:
Zhang Z;Gothe F;Pennamen P;James JR;McDonald D;Mata CP;Modis Y;Alazami AM;Acres M;Haller W;Bowen C;Döffinger R;Sinclair J;Brothers S;Zhang Y;Matthews HF;Naudion S;Pelluard F;Alajlan H;Yamazaki Y;Notarangelo LD;Thaventhiran JE;Engelha

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白细胞介素-2通过异源三聚体受体发挥作用,传递免疫的基本信号。在这里,我们确定人白细胞介素-2受体(IL-2 R)β链(IL 2 RB)基因缺陷是危及生命的免疫失调的原因。我们报告了三个纯合突变theIL 2 RB基因的八个人从四个血缘家庭,导致疾病的不同机制。几乎所有的患者都表现为自身抗体、高丙种球蛋白血症、肠道炎症、皮肤病、淋巴结病和巨细胞病毒病。患者T淋巴细胞缺乏IL-2 R β的表面表达,并且不能对IL-2刺激作出应答。相比之下,自然杀伤细胞保留部分IL-2 R β表达和功能。IL-2 R β功能丧失在重组系统中重现,其中IL-2 R β突变导致表面表达和IL-2结合减少。干细胞移植改善了一名患者的临床症状;野生型IL-2 R β的强制表达也增加了体外患者T淋巴细胞的IL-2反应性。来自这些患者的见解可以为免疫性疾病和癌症的基于IL-2的疗法的开发提供信息。
Interleukin-2, which conveys essential signals for immunity, operates through a heterotrimeric receptor. Here we identify human interleukin-2 receptor (IL-2R) β chain (IL2RB) gene defects as a cause of life-threatening immune dysregulation. We report three homozygous mutations in theIL2RBgene of eight individuals from four consanguineous families that cause disease by distinct mechanisms. Nearly all patients presented with autoantibodies, hypergammaglobulinemia, bowel inflammation, dermatological abnormalities, lymphadenopathy, and cytomegalovirus disease. Patient T lymphocytes lacked surface expression of IL-2Rβ and were unable to respond to IL-2 stimulation. By contrast, natural killer cells retained partial IL-2Rβ expression and function. IL-2Rβ loss of function was recapitulated in a recombinant system in whichIL2RBmutations caused reduced surface expression and IL-2 binding. Stem cell transplant ameliorated clinical symptoms in one patient; forced expression of wild-type IL-2Rβ also increased the IL-2 responsiveness of patient T lymphocytes in vitro. Insights from these patients can inform the development of IL-2–based therapeutics for immunological diseases and cancer.
白细胞介素 2/白细胞介素 15 受体 β 亚基的缺陷表达会导致自然杀伤细胞缺陷形式的严重联合免疫缺陷。
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