受体神经元影响癌症免疫监测
Mohammad Balood1,2, Maryam Ahmadi1, Tuany Eichwald1,3
1Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, Quebec, Canada.
Nature
|November 3, 2022
概括
瘤中的神经细胞可以抑制免疫系统. 阻断这些感觉神经元中的神经CGRP增强了抗瘤免疫力,并改善了黑色素瘤模型的存活率.
科学领域:
- 免疫学
- 神经科学
- 癌症学
背景情况:
- 固体瘤通过感觉和自主神经纤维进行神经化.
- 疼痛感应神经元对瘤免疫监测的影响尚不清楚.
研究的目的:
- 研究黑色素瘤细胞与感应神经元之间的相互作用.
- 确定 nociceptors释放的神经是否影响抗瘤免疫力.
主要方法:
- 研究了黑色素瘤细胞与 nociceptor神经元的相互作用.
- 研究了与卡尔西基因相关的 (CGRP) 对细胞毒性CD8+T细胞的影响.
- 在小鼠模型中利用了TRPV1系的基因切除,药理性沉默和CGRP受体对抗作用.
- 在人类黑色素瘤患者的活检中进行单细胞RNA测序.
主要成果:
- 黑色素瘤细胞促进受体神经细胞的生长和神经释放.
- CGRP 直接增加了细胞毒性 CD8+ T 细胞的消耗,从而影响黑色素瘤的消除.
- 阻断CGRP信号或感觉神经减少了T细胞疲劳,减少了瘤生长,并显著改善了小鼠的存活率.
- 人类黑色素瘤数据显示RAMP1+ CD8+ T细胞更为耗尽,与预后较差相关.
结论:
- 瘤抑制性感受体释放CGRP,抑制抗瘤CD8+T细胞的反应.
- 向CGRP信号是一种增强癌症免疫监测和改善黑色素瘤治疗结果的潜在策略.
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