多态核核髓蛋白衍生抑制细胞通过PD-L1和TGF-β通路调节HIV感染期间的免疫恢复
Zihua Wang1, Yue Hu2, Jing Song2
1Department of Medical Oncology, Bethune International Peace Hospital, Shijiazhuang, China.
Frontiers in cellular and infection microbiology
|January 1, 2025
概括
骨髓衍生抑制细胞 (MDSCs) 的扩张抑制了HIV中CD4+T细胞的反应. 准PD-L1和TGF-β通路可能会改善免疫不响应者 (INRs) 的免疫恢复.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 骨髓衍生抑制细胞 (MDSCs) 以其在各种疾病中的免疫抑制作用而闻名.
- 它们的特定功能和对艾滋病毒感染时免疫系统不完全恢复的贡献尚不清楚.
研究的目的:
- 研究MDSCs在艾滋病毒感染中的作用,特别是在免疫不响应者 (INRs) 中.
- 探索针对PD-L1和TGF-β途径对艾滋病毒感染个体T细胞恢复的影响.
主要方法:
- 横截面研究比较艾滋病毒感染个体 (INR和响应者) 与健康对照.
- 流细胞计和实时PCR测量MDSCs和免疫调节分子 (PD-L1,ARG1,iNOS,IL-10,TGF-β,IDO) 的数量.
- 在体外实验中评估PD-L1和TGF-β通路阻塞对MDSC和CD4+T细胞的影响.
主要成果:
- 艾滋病毒感染者的PMN-MDSC增加,与CD4计数负相关.
- 在INR中,PMN-MDSC抑制了CD4+T细胞的增殖和IFN-γ的产生.
- 在INR中,PMN-MDSC上的PD-L1和TGF-β表达升高;联合抑制在体外恢复了CD4+T细胞活性.
结论:
- 扩大的PMN-MDSCs在HIV感染中抑制CD4+T细胞反应.
- 对PD-L1和TGF-β途径的联合向显示了在INR中增强免疫恢复的潜力.
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