黑色素瘤细胞内在的PD-1受体功能促进瘤生长
Sonja Kleffel1, Christian Posch2, Steven R Barthel1
1Harvard Skin Disease Research Center, Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Cell
|September 12, 2015
概括
在黑色素瘤细胞的编程细胞死亡1 (PD-1) 驱动瘤生长,即使没有免疫细胞. 抑制这种内在的PD-1通道减缓了黑色素瘤的进展,这表明了新的治疗点.
科学领域:
- 癌症学
- 免疫学
- 癌症生物学
背景情况:
- 针对编程细胞死亡1 (PD-1) 的治疗抗体通过激活抗瘤免疫力对黑色素瘤有效.
- 癌细胞本身中PD-1通路的作用,特别是在黑色素瘤中,仍然在很大程度上未被探索.
研究的目的:
- 研究PD-1通路在黑色素瘤发育和进展中的细胞内在功能.
- 确定抑制黑色素瘤细胞内在PD-1是否可以抑制瘤生长.
主要方法:
- 在小鼠和人类黑色素瘤细胞亚群中分析PD-1表达.
- 通过RNA干扰 (RNAi),阻断抗体和突变发生抑制黑色素瘤细胞内在的PD-1.
- 在各种小鼠模型中评估瘤生长,包括免疫能力强,免疫功能低下和PD-1 缺乏的接受者.
- 对黑色素瘤-PD-1的过度表达和配体 (PD-L1) 参与研究.
- 调查下游信号通道,包括mTOR.
主要成果:
- 在小鼠和人类黑色素瘤中发现了表达PD-1的癌症亚群.
- 发现黑色素瘤细胞内在的PD-1可促进瘤形成,独立于适应性免疫.
- 抑制黑色素瘤PD-1 显著抑制了不同免疫能力和免疫受损模型的瘤生长.
- 黑色素瘤PD-1的过度表达或PD- L1的参与增强了瘤性.
- 黑色素瘤PD-1信号与mTOR信号的调节有机学的联系.
结论:
- 在黑色素瘤生长中,PD-1:PD-L1轴发挥细胞内在的功能.
- 向黑色素瘤细胞内在的PD-1 是一种潜在的治疗策略,可以提高抗PD-1 疗法的疗效.
- 阻断黑色素瘤-PD-1可能是对抗黑色素瘤的新方法,补充目前的免疫疗法.
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