天生的免疫细胞衍生BAFF通过非正规NF-κB在糖尿病自身免疫中促进ICOSL+B细胞的炎症反应
Zeying Li1, Mingjiu Zhao2, Wenjun Luo2
1National Clinical Research Center for Metabolic Diseases, Metabolic Syndrome Research Center, Key Laboratory of Diabetes Immunology, Ministry of Education, and Department of Metabolism and Endocrinology, The Second Xiangya Hospital of Central South University, Changsha, China; Department of Endocrinology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Southern Medical University, Guangzhou, China; CSU-Sinocare Research Center for Nutrition and Metabolic Health, Xiangya School of Public Health, Central South University, Changsha, China; Furong Laboratory, Changsha, China.
研究人员发现了一种特定的B细胞子集,ICOSL+B细胞,驱动1型糖尿病 (T1D) 的进展. 阻止这种途径改善了小鼠模型中的自身免疫性疾病,为T1D提供了新的治疗点.
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.
- 虽然T细胞是主要的嫌疑人,但B细胞现在被认为在T1D病变发生过程中至关重要.
研究的目的:
- 为了识别参与1型糖尿病 (T1D) 病原发生的新型B细胞子集.
- 阐明这些B细胞导致自身免疫糖尿病的机制.
- 探索针对这些B细胞的潜在治疗策略.
主要方法:
- 在人类T1D队列和小鼠模型中识别和表征可诱导T细胞共刺激器连接体 (ICOSL) 表达B细胞.
- 功能性测试评估B细胞协同刺激,增殖和细胞因子生产.
- 研究先天免疫细胞,B细胞激活因子 (BAFF) 和NF-κB信号传递在ICOSL+B细胞生成中的作用.
- 在T1D小鼠模型中评估ICOSL阻塞疗效.
主要成果:
- 确定了一组表达ICOSL的B细胞 (ICOSL+B细胞),并与T1D进展相关.
- ICOSL+B细胞表现出增强的共刺激性,增殖性和炎症性细胞因子产生能力,有助于T1D.
- 天生的免疫细胞,通过BAFF非法定NF-κB轴,促进产生致病性ICOSL+B细胞.
- 在小鼠模型中,ICOSL的遗传删除或抗体阻断减少了B细胞和T细胞的炎症,并改善了自身免疫糖尿病.
结论:
- 一个涉及先天性免疫细胞,BAFF和ICOSL+ B细胞的新型轴在T1D中弥合了先天性和适应性免疫力.
- ICOSL+B细胞是1型糖尿病的关键病原体.
- 准ICOSL通路为T1D提供了一个有前途的治疗策略.
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