激活的PI3Kδ特异性地扰乱了小鼠Treg稳态和功能,导致免疫调节失调
Akhilesh K Singh1, Fahd Al Qureshah1,2,3, Travis Drow1
1Center for Immunity and Immunotherapy, Seattle Children's Research Institute, Seattle, WA.
bioRxiv : the preprint server for biology
|January 8, 2024
概括
在Foxp3+调节性T细胞 (Treg) 中失调的PI3Kδ信号导致慢性炎症和自身免疫. 最佳的PI3Kδ活性对于Treg平衡至关重要,这表明了治疗向潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 调节Foxp3+的T细胞 (Treg) 对于免疫耐受性和预防自身免疫性至关重要.
- PI3Kδ信号传递对Treg发育和功能至关重要,但其调节失调的影响尚未完全理解.
研究的目的:
- 通过使用激活PI3Kδ综合征 (APDS) 的条件小鼠模型,研究Treg区内改变PI3Kδ信号的作用.
主要方法:
- 使用一种有条件的小鼠模型,其中PIK3CD功能增益突变特别存在于Tregs (aPIK3CD).
- 分析了Treg发育,外围Treg数,表型 (PD1表达),竞争力和免疫后的幽默反应.
主要成果:
- 特里格特异性aPIK3CD小鼠显示体重减轻,慢性炎症 (T细胞效应者增加,IFN-γ分泌),自发的生殖中心反应和自身抗体.
- PI3Kδ功能的增加增加了Treg前体的发育和外围Treg数量,但改变了它们的表型并降低了竞争力.
- 在T细胞依赖抗原免疫接种后,观察到高性反应和卵泡Treg数量的降低.
结论:
- 一个最佳PI3Kδ活性值对于Treg稳态和功能至关重要.
- 在Tregs中,PI3Kδ信号传递起着复杂的作用,影响Treg数量和功能.
- 针对Tregs中的PI3Kδ信号传导可能是调节免疫反应的治疗策略.
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