化学素触发了具有自然杀手细胞功能的CD8 T细胞子集的迁移
Romain Ballet1, Melissa LaJevic1, Noelle Huskey-Mullin2
1Palo Alto Veterans Institute for Research (PAVIR), Veterans Affairs Palo Alto Health Care System (VAPAHCS), Palo Alto, CA 94304, USA; Laboratory of Immunology and Vascular Biology, Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.
概括
化学素 (一种蛋白质) 将具有NK类功能的特定CD8T细胞招募到瘤中. 这一途径增强了抗瘤免疫力,为癌症治疗提供了新的免疫疗法策略.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 蜂通讯贩运 蜂通讯贩运
背景情况:
- 将效应性免疫细胞招募到瘤微环境中,对于延缓癌症进展至关重要.
- 特定的CD8T细胞子集具有与抗瘤免疫相关的效应器功能.
- 化基因及其受体在免疫细胞对瘤的招募中的作用需要进一步阐明.
研究的目的:
- 研究人类CD8T细胞上化学素受体 (CMKLR1) 的表达和功能.
- 确定化学素:CMKLR1轴在瘤微环境中的CD8 T细胞招募和激活中的作用.
- 探索针对癌症免疫治疗的这种途径的治疗潜力.
主要方法:
- 流细胞计和基因/蛋白质表达分析以识别人类CD8 T细胞子集上的CMKLR1.
- 化学测试试图评估CMKLR1-表达的CD8T细胞对化学素的迁移反应.
- 在体内研究使用前列腺瘤小鼠模型,操纵化学素表达和α4整合素阻塞.
主要成果:
- 特定的人类CD8效应器记忆T细胞子集 (CCR7-CD45RO+和CCR7-CD45RO-RA) 表达CMKLR1并与化学素结合.
- 这些表达CMKLR1的CD8T细胞表现出NK类特征,并以化学素依赖的方式被招募到瘤中.
- 在小鼠前列腺瘤模型中,化学素的过度表达增加了瘤内CD8+T细胞,而α4整合素阻断抑制了这种招募.
结论:
- 化学素:CMKLR1相互作用定义了一个专门的,NK类的CD8 T细胞子集,具有潜在的抗瘤活性.
- 这一途径对于在瘤微环境中招募 CD8 T 效应细胞至关重要.
- 针对chemerin:CMKLR1轴是一种有前途的免疫治疗策略,可以增强抗瘤免疫力.
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