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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 3.4 ) 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:


外源性白细胞介素 2 可以挽救具有新型加帽蛋白调节剂和肌球蛋白 1 连接子 2 突变的患者的体外 T 细胞活化和增殖。



加帽蛋白调节剂和肌球蛋白 1 连接子 2 (CARMIL2) 缺陷的特点是 T 细胞活化受损,这归因于 CD28 介导的共信号传导缺陷。在此,我们的目的是分析外源白细胞介素 (IL)-2 对 CARMIL2 缺陷家族的体外 T 细胞活化和增殖的影响。这项研究包括四名儿童(一名男性和三名女性;就诊时年龄为 2·5-10 岁)。患者出现炎症性肠病和反复病毒感染。遗传分析揭示了 CARMIL2 中新的纯合 25 碱基对缺失。免疫印迹显示所有四名患者均不存在 CARMIL2 蛋白,并证实了 CARMIL2 缺陷的诊断。添加不同浓度的 IL-2 可在体外激活 T 细胞。激活 48 小时和 5 天后测量 CD25 和干扰素 (IFN)-γ 水平。与健康对照相比,所有患者中活化的 CD8+ 和 CD4+ T 细胞上的 CD25 表面表达均显着减少。此外,所有患者的 CD8+ T 细胞均显示出 IFN-γ 的产生显着减少。当来自 CARMIL2 缺陷患者的细胞接受 IL-2 处理时,CD25 和 IFN-γ 的产生以剂量依赖性方式增加。通过 Cell Trace Violet 测量,一名患者的 T 细胞增殖受到损害,但 IL-2 也能挽救该细胞增殖。总之,我们发现 IL-2 可以挽救 CARMIL2 缺陷患者的 T 细胞活化和增殖。因此,应该进一步研究 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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