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细胞表面ZnT8抗体预防和逆转小鼠自身免疫性糖尿病

Devi Kasinathan¹, Zheng Guo¹, Dylan C Sarver¹

¹Department of Physiology, Johns Hopkins School of Medicine, Baltimore, MD.

|February 22, 2024

概括

一种针对1型糖尿病 (T1D) 中运输体8 (ZnT8) 的新型抗体可以预防和逆转小鼠的疾病. 这种免疫疗法掩盖了β细胞上的自身抗原,促进了自我耐受性,并防止了自身免疫破坏.

科学领域:

免疫学免疫学免疫学
内分泌学在内分泌学.
自免疫性疾病自免疫性疾病

背景情况:

1型糖尿病 (T1D) 涉及胰腺小岛内胰岛素生成β细胞的自身免疫破坏.
载体8 (ZnT8) 是β细胞上的关键自身抗原,使其成为潜在的治疗标.
以前的研究表明,针对ZnT8的单克隆抗体 (mAb43) 可以保护β细胞.

研究的目的:

调查mAb43在保护β细胞免受自身免疫攻击中的作用机制.
评估mAb43在小鼠模型中预防和逆转T1D的治疗疗效.

主要方法:

在β细胞上的mAb43结合部位的表征.
评估mAb43对胰腺小岛中的抗原呈现和免疫细胞种群的影响.
在体内给非肥胖糖尿病小鼠 (NOD) mAb43以评估T1D预防和逆转.

主要成果:

mAb43结合到β细胞上的外细胞位点,在葡萄糖刺激的胰岛素分泌过程中掩盖ZnT8和胰岛素.
在体内给药mAb43增加了NOD小鼠的岛屿中的调节性T细胞.
mAb43治疗导致对T1D发病和逆转新发型糖尿病的完全和持续的保护.

结论:

mAb43通过掩盖β细胞自身抗原,作为针对小岛的抗原特异性免疫疗法.
这种机制抑制了自身免疫级联,为T1D的预防和治疗提供了一个新的策略.
mAb43证明了安全有效的T1D免疫疗法的潜力,具有可逆效应,没有观察到不良事件.

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