γδ T 细胞通过抑制αβ T 细胞激活来支持胰腺癌发生
Donnele Daley1, Constantinos Pantelis Zambirinis1, Lena Seifert1
1S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, 430 East 29th Street, New York, NY 10016, USA; Department of Cell Biology, New York University School of Medicine, 430 East 29th Street, New York, NY 10016, USA.
Cell
|August 30, 2016
概括
在胰腺癌中,一种特定类型的T细胞,即玛三角T细胞,抑制抗瘤免疫力. 阻断这些细胞增强了其他T细胞,为胰腺管腺癌提供了新的治疗策略.
科学领域:
- 免疫学
- 癌症学
- 癌症研究
背景情况:
- 炎症在胰腺癌的发展中起着关键作用.
- 三角T细胞 (γδT细胞) 是胰腺管腺癌 (PDA) 瘤微环境的重要组成部分.
研究的目的:
- 调查gDT细胞在胰腺癌进展中的作用.
- 探索 γδT 细胞影响抗瘤免疫力的机制.
- 评估针对PDA中的γδT细胞的治疗策略.
主要方法:
- 在人类PDA中识别和描述γδT细胞群.
- 参与γδT细胞招募的化学激素信号分析.
- 试验性耗尽或阻断 γδT 细胞.
- 在γδT细胞调节后对αβT细胞反应的评估.
- 在 γδT 细胞上评估免疫检查点配体表达 (例如,PD-L1).
- 在体内测试以评估针对γδT细胞的瘤保护.
主要成果:
- 在人体PDA中,γδT细胞约占瘤透T细胞的40%.
- γδT细胞的招募是由各种化学因子信号调节的.
- 消除或阻断 γδT 细胞显示出对PDA的保护作用.
- γδT细胞的切除导致了αβT细胞的透,激活和Th1偏离的增强.
- 透 PDA 的 γδT 细胞表达耗尽配体,抑制适应性抗瘤免疫力.
- 在 γδT 细胞上阻断 PD- L1 增加了 CD4 ((+) 和 CD8 ((+) T 细胞透和免疫性,从而导致瘤保护.
结论:
- γδT细胞是胰腺癌中效应T细胞激活的中心调节者.
- 在PDA中,γδT细胞是免疫抑制检查点连接体的关键来源.
- 向γδT细胞,特别是它们的检查点连接体表达,代表了胰腺癌的有希望的治疗途径.
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