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Diabetologia:1型糖尿病的GAD-alum免疫疗法可扩展双功能Th1 / Th2自反应性CD4 T细胞

2020-07-27 MedSci原创 MedSci原创

抗原特异性治疗旨在改变1型糖尿病的炎性T细胞反应,恢复免疫耐受。

抗原特异性治疗旨在改变1型糖尿病的炎性T细胞反应,恢复免疫耐受。其中,一种策略是将GAD65与GAD-alum结合,利用alum的T helper (Th)2-偏置佐剂特性,从而调节病态的Th1自身免疫。我们在先前报道的由1型糖尿病试验网进行的随机安慰剂对照临床试验中探索了GAD-alum作用的细胞和分子机制。

在由1型糖尿病试验网进行的临床试验中,参与者接种20磅的GAD-alum (2 - 3次)或单独接种GAD-alum,并在基线和治疗后保存外周血单核细胞样本。在本研究中,在这些样品中测量了GAD特异性T细胞反应,并生成了GAD特异性T细胞系和克隆,然后对其进行进一步表征。

免疫后第91天,与单独使用alum进行免疫的参与者相比,我们发现接受GAD-alum免疫的参与者中GAD特异性IL-13 + CD4 T细胞应答的发生率显着更高(分别为71%和94%进行过两次或三次治疗)。 (38%;分别为p = 0.003和p = 0.0002)伴随着高水平的IL-13,IL-4和IL-5分泌,证实了GAD特异性GAD诱导的Th2反应。值得注意的是,免疫后观察到的GAD特异性IL-13 + CD4 T细胞共分泌IFN-γ,表现出双功能Th1 / Th2表型。单细胞转录组分析分别与典型的Th2和Th1转录因子基因GATA3和TBX21一致,确定了IL13和IFNG的表达。

研究结果表明,GAD-alum可免疫激活并具有独特双功能表型的钆特异性CD4 T细胞繁殖,对其进行功能分析可能对理解治疗反应很重要。

原始出处:

Sefina Arif, Iria Gomez-Tourino,GAD-alum immunotherapy in type 1 diabetes expands bifunctional Th1/Th2 autoreactive CD4 T cells

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    2021-03-07 qidongfanjian
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    2021-04-23 仁医06
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    2020-07-28 misszhang

    谢谢MedSci提供最新的资讯

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