针对致病性MHCII类的调节性T细胞:胰岛素表位推迟自发性自身免疫糖尿病
Nyerhovwo Obarorakpor1, Deep Patel1, Reni Boyarov1
1Diabetes Center, Indiana Biosciences Research Institute, Indianapolis, IN, United States.
Frontiers in immunology
|August 18, 2023
概括
输注针对胰岛素B:9-23表位特异的工程调节性T细胞 (Tregs) 延迟了小鼠1型糖尿病 (T1D) 的发病. 这种向的Treg疗法通过抑制小岛的自身免疫反应来预防T1D的前景.
科学领域:
- 免疫学 免疫学 免疫学
- 内分泌学 在内分泌学.
- 这是一种自身免疫力.
背景情况:
- 1型糖尿病 (T1D) 涉及胰腺β细胞的自身免疫破坏.
- 调节性T细胞 (Tregs) 可以抑制自身免疫反应.
- 特定的表位体,如与MHCII类 (IAg7) 结合的胰岛素B链9-23 (InsB:R3),是T1D病变发生的关键.
研究的目的:
- 调查InsB:R3特异性Tregs是否可以预防自发T1D.
- 为了确定是否有针对性的Tregs可以抑制小岛的自身免疫反应,并防止T1D的进展.
主要方法:
- 生产了工程 InsB:R3 特定的仿真抗原受体 (CAR) Tregs.
- 这些Tregs在自发T1D非肥胖糖尿病 (NOD).CD28-/-小鼠中进行了疾病保护作用的测试.
- 在接受治疗和对照组中监测了免疫反应和T1D发病.
主要成果:
- 在抗原接触时,InsB:R3-CAR Tregs分泌了IL-10.
- 单次输注InsB:R3 Tregs在95%的治疗小鼠中显著延迟了T1D发病的发生.
- 35%的接受治疗的小鼠长时间保持了高血糖,Tregs 定位到目标组织.
结论:
- 与多克隆Tregs相比,MHCII类/胰岛素特异性Tregs提供了有效的T1D保护.
- 针对MHCII/胰岛素表位体的向Treg疗法是预防T1D的一个有前途的策略.
- 这种方法表明,一种安全有效的免疫疗法可以预防自身免疫性糖尿病.
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