多原子分析揭示了不一致的免疫原特性和黑色素瘤脑转移中独特的瘤微环境
Gino K In1, Jennifer R Ribeiro2, Jun Yin2
1Division of Oncology, Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA. Gino.In@med.usc.edu.
NPJ precision oncology
|November 14, 2023
概括
与其他黑色素瘤类型不同,黑色素瘤脑转移显示抑制免疫活性和增加氧化酸化. 准代谢和血管生成途径可能会提高免疫治疗对这些具有挑战性的瘤的有效性.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 代谢研究的研究.
背景情况:
- 黑色素瘤大脑转移 (MBM) 存在重大治疗挑战,对免疫检查点疗法有不可预测的反应.
- 之前的研究表明,MBM已经减少了抗瘤免疫反应,并且具有高氧化酸化的特征.
- 了解MBM独特的生物特征对于开发有效的治疗策略至关重要.
研究的目的:
- 对一个大型的现实世界黑色素瘤队列进行全面的多原子分析,以表征MBM.
- 为了比较MBM的免疫微环境和分子途径与原发性皮肤黑色素瘤 (PCM) 和脑外转移 (ECM).
- 确定改善MBM免疫疗法反应的潜在治疗点.
主要方法:
- 对大量现实世界黑色素瘤患者队列的多原子分析.
- 免疫细胞透的计算推断和途径分析 (英才途径分析 - IPA).
- 评估干扰素- (IFNγ) 评分,T细胞炎症评分,瘤突变负担和基因表达 (TNF,IL12B).
主要成果:
- 与PCM和ECM相比,MBM显示出明显较低的IFNγ和T细胞炎症得分,无论瘤的突变负担如何.
- 在MBM中观察到较少的推断免疫细胞透,与降低的TNF和IL12BmRNA水平相关.
- MBM显示抑制了炎症和树突细胞成熟路径,增加了致病性PTEN突变,增强了血管生成信号,并增强了氧化酸化 (OXPHOS).
- OXPHOS丰富与NK和B细胞相关的转录组签名有负相关性.
结论:
- MBM具有独特的分子和免疫特征,其特点是免疫抑制和代谢变化.
- 已确定的途径,包括OXPHOS和血管生成,代表治疗干预的潜在目标.
- 在MBM中调节代谢或血管新生通路可能会增强患者对免疫治疗的反应.
相关概念视频
The Tumor Microenvironment
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
The Tumor Microenvironment
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...


