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Exogenous interleukin-2 can rescue in-vitro T cell activation and proliferation in patients with a novel capping protein regulator and myosin 1 linker 2 mutation.
Clinical & Experimental Immunology ( IF 4.6 ) Pub Date : 2020-04-18 , DOI: 10.1111/cei.13432
O Shamriz 1, 2 , A J Simon 3 , A Lev 4, 5 , O Megged 6 , O Ledder 7 , E Picard 8 , L Joseph 8 , V Molho-Pessach 9 , Y Tal 2 , P Millman 10 , M Slae 10 , R Somech 4, 5 , O Toker 11, 12 , M Berger 1
Affiliation  

Capping protein regulator and myosin 1 linker 2 (CARMIL2) deficiency is characterized by impaired T cell activation, which is attributed to defective CD28-mediated co-signaling. Herein, we aimed to analyze the effect of exogenous interleukin (IL)-2 on in-vitro T cell activation and proliferation in a family with CARMIL2 deficiency. This study included four children (one male and three females; aged 2·5-10 years at presentation). The patients presented with inflammatory bowel disease and recurrent viral infections. Genetic analysis revealed a novel homozygous 25-base pairs deletion in CARMIL2. Immunoblotting demonstrated the absence of CARMIL2 protein in all four patients and confirmed the diagnosis of CARMIL2 deficiency. T cells were activated in-vitro with the addition of IL-2 in different concentrations. CD25 and interferon (IFN)-γ levels were measured after 48 h and 5 days of activation. CD25 surface expression on activated CD8+ and CD4+ T cells was significantly diminished in all patients compared to healthy controls. Additionally, CD8+ T cells from all patients demonstrated significantly reduced IFN-γ production. When cells derived from CARMIL2-deficient patients were treated with IL-2, CD25 and IFN-γ production increased in a dose-dependent manner. T cell proliferation, as measured by Cell Trace Violet, was impaired in one patient and it was also rescued with IL-2. In conclusion, we found that IL-2 rescued T cell activation and proliferation in CARMIL2-deficient patients. Thus, IL-2 should be further studied as a potential therapeutic modality for these patients.

中文翻译:

外源性白介素-2可以挽救具有新型封端蛋白调节剂和肌球蛋白1接头2突变的患者的体外T细胞活化和增殖。

上限蛋白调节剂和肌球蛋白1接头2(CARMIL2)缺乏症的特征是受损的T细胞活化,这归因于CD28介导的共信号传导缺陷。本文中,我们旨在分析外源白介素(IL)-2对具有CARMIL2缺乏症的家庭的体外T细胞活化和增殖的影响。这项研究包括四个孩子(一男一女三;在报告中年龄为2·5-10岁)。患者表现为炎症性肠病和病毒复发。遗传分析显示在CARMIL2中有一个新颖的纯合的25个碱基对的缺失。免疫印迹显示所有四名患者均不存在CARMIL2蛋白,并证实了CARMIL2缺乏症的诊断。通过添加不同浓度的IL-2体外激活T细胞。激活48小时和5天后,测量CD25和干扰素(IFN)-γ的水平。与健康对照相比,所有患者中活化的CD8 +和CD4 + T细胞上CD25表面的表达均显着降低。此外,所有患者的CD8 + T细胞均表现出明显降低的IFN-γ产生。当用IL-2处理源自CARMIL2缺陷患者的细胞时,CD25和IFN-γ的产生以剂量依赖性方式增加。一名患者的T细胞增殖(通过Cell Trace Violet测量)受到损害,并且也可以用IL-2挽救。总之,我们发现IL-2可以在CARMIL2缺乏症患者中挽救T细胞的活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。与健康对照相比,所有患者中活化的CD8 +和CD4 + T细胞上CD25表面的表达均显着降低。此外,所有患者的CD8 + T细胞均表现出明显降低的IFN-γ产生。当用IL-2处理源自CARMIL2缺陷患者的细胞时,CD25和IFN-γ的产生以剂量依赖性方式增加。一名患者的T细胞增殖(通过Cell Trace Violet测量)受到损害,并且也可以用IL-2挽救。总之,我们发现IL-2可以在CARMIL2缺乏症患者中挽救T细胞的活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。与健康对照相比,所有患者中活化的CD8 +和CD4 + T细胞上CD25表面的表达均显着降低。此外,所有患者的CD8 + T细胞均表现出明显降低的IFN-γ产生。当用IL-2处理源自CARMIL2缺陷患者的细胞时,CD25和IFN-γ的产生以剂量依赖性方式增加。一名患者的T细胞增殖(通过Cell Trace Violet测量)受到损害,并且也可以用IL-2挽救。总之,我们发现IL-2可以在CARMIL2缺乏症患者中挽救T细胞的活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。所有患者的CD8 + T细胞均表现出明显降低的IFN-γ产生。当用IL-2处理源自CARMIL2缺陷患者的细胞时,CD25和IFN-γ的产生以剂量依赖性方式增加。一名患者的T细胞增殖(通过Cell Trace Violet测量)受到损害,并且也可以用IL-2挽救。总之,我们发现IL-2可以在CARMIL2缺乏症患者中挽救T细胞的活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。所有患者的CD8 + T细胞均表现出明显降低的IFN-γ产生。当用IL-2处理源自CARMIL2缺陷患者的细胞时,CD25和IFN-γ的产生以剂量依赖性方式增加。一名患者的T细胞增殖(通过Cell Trace Violet测量)受到损害,并且也可以用IL-2挽救。总之,我们发现IL-2可以在CARMIL2缺乏症患者中挽救T细胞的活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。我们发现IL-2可以挽救CARMIL2缺乏症患者的T细胞活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。我们发现IL-2可以拯救CARMIL2缺乏症患者的T细胞活化和增殖。因此,应进一步研究IL-2作为这些患者的潜在治疗方式。
更新日期:2020-03-22
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