调控性KIR+CD8+ T细胞在人类怀孕期间是升高的
Jing Li1,2,3, Xuerui Wang1,2, Andreas I Lackner4
1Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
Science translational medicine
|August 6, 2025
概括
杀手细胞免疫球蛋白样受体 (KIR) + CD8+ T 细胞在怀孕期间增加,特别是男性胎儿,有助于孕妇的耐受性. 较高水平与妊娠并发症相关,这表明它在胎儿免疫调节中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 生殖免疫学 生殖免疫学
- 细胞免疫学 细胞免疫学
背景情况:
- 母胎耐受性需要平衡免疫力和接受半异构的胎儿.
- 母胎耐受性的机制尚未完全理解.
- 杀手细胞免疫球蛋白样受体 (KIR) + CD8+ T 细胞在其他免疫环境中调节自我反应.
研究的目的:
- 研究KIR+ CD8+ T细胞在人类怀孕期间的作用和活性.
- 确定KIR+ CD8+ T细胞是否有助于孕产妇对胎儿的耐受性.
- 探索KIR+ CD8+ T细胞与怀孕结果的关联.
主要方法:
- 在周围血液中的量化KIR+ CD8+ T细胞和怀孕期间的 decidua.
- 进行了体外检测,以评估T细胞全活性抑制.
- 采用了单细胞RNA测序的十足T细胞.
- 与怀孕结果相关的KIR+ CD8+ T细胞频率,如自发流产和孕前.
主要成果:
- 在第二个三个月内观察到KIR+ CD8+ T细胞的频率增加,特别是在男性胎儿中.
- 在体外,KIR+ CD8+ T 细胞抑制了母性全活性 T 细胞和针对男性特异性抗原的 CD8+ T 细胞.
- 在怀孕期间,KIR+ CD8+ T细胞扩大并分化为细胞毒性细胞.
- 在 decidua 中发现KIR+ CD8+ T细胞升高,活性标志物增加.
- 较高的KIR+ CD8+ T细胞频率与自发流产和孕前有关.
结论:
- KIR+ CD8+ T 细胞在调节胎儿特异性全活性 T 细胞反应方面发挥作用,可能有助于孕产妇的耐受性.
- 胎儿性别可能会影响KIR+ CD8+ T细胞的频率.
- KIR+ CD8+ T 细胞可以作为孕期疾病的生物标志物或治疗点.
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