通过巨细胞有效补充介导免疫抑制T细胞的清除
Angela A F Gankema1, Charita Furumaya1, Sara Fernández-Hermira1
1Department of Molecular Hematology, Sanquin Research, Amsterdam University Medical Center (AUMC), University of Amsterdam, Amsterdam, Netherlands.
Frontiers in immunology
|June 1, 2023
概括
中性粒细胞在癌症中损害T细胞,导致它们被巨细胞吸收. 补充物位化标记这些小T细胞快速清除,影响抗瘤免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞生物学 细胞生物学
背景情况:
- 癌症仍然是全球主要的死亡原因,患者的结果受到瘤特征和宿主免疫反应的影响.
- 瘤微环境 (TME) 中的中性粒细胞可以抑制抗瘤T细胞的活动,从而导致更小,功能较差的T细胞.
- 已知瘤相关巨细胞 (TAMs) 可以清除受损或死亡的细胞.
研究的目的:
- 调查TME中观察到的小T细胞稀缺背后的机制.
- 测试宏细胞迅速吞TME中受损的T细胞的假设.
- 阐明补充和巨细胞在瘤微环境中的T细胞调节中的补充和巨细胞化作用.
主要方法:
- 同焦显微镜观察T细胞形态和TME中的位置.
- 血清opsonization测试以确定补充在T细胞吸收中的作用.
- 用巨细胞和补充-opsonized T 细胞进行细胞分析.
- 使用对巨细胞补体受体 (CR1,CR3,CR4) 的抗体进行抑制研究.
主要成果:
- 只有较小的,受损的T细胞在血清opsonization后被巨细胞有效地细胞化.
- 补充因子C3碎片对受损的T细胞产生了作用,导致巨细胞迅速吸收.
- 抑制巨补充受体CR1,CR3和CR4完全阻断受损T细胞的细胞形成.
- 活跃增殖的 (大) T 细胞没有受到中性粒细胞的损害,也没有被巨细胞化.
结论:
- 损坏的T细胞通过补充介导的细胞分裂被巨细胞迅速从TME中清除.
- 这种机制突出了抑制的T细胞去除的途径,可能会影响抗瘤免疫力.
- 了解这种相互作用对于开发新型癌症免疫疗法至关重要.
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