一个突变统治他们所有:突变KRAS控制瘤内在和微环境信号
Sören Müller1, Akshay T Krishnamurty1
1Genentech, South San Francisco, California.
Cancer research
|November 28, 2023
概括
突变KRAS (KRAS*) 通过激活富含脂质的癌症相关纤维细胞驱动结直肠癌的进展. 这一发现为KRAS*突变结直肠瘤提供了潜在的新疗法策略.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 结肠直肠癌 (CRC) 在全球范围内仍然是一个重大的健康挑战.
- 激活KRAS突变 (KRAS*) 是CRC的常见驱动因素,但针对KRAS*的治疗策略有限.
- 瘤微环境 (TME) 在CRC进展和治疗耐药性方面发挥着关键作用.
研究的目的:
- 研究突变KRAS (KRAS*) 对结直肠癌瘤微环境的影响.
- 阐明KRAS*影响癌症相关纤维细胞 (CAF) 和瘤进展的分子机制.
- 在KRAS*驱动的信号级联中识别潜在的治疗目标.
主要方法:
- 在小鼠和人类结直肠癌样本上利用单细胞和散装RNA测序.
- 在机械学研究中使用患者衍生器官和2D体外系统.
- 在经过基因工程的结直肠癌小鼠模型中进行了体内验证.
主要成果:
- 确定了KRAS*下游的一个特定的分子信号级联.
- 证明KRAS*激活了癌症相关纤维细胞 (CAFs) 中的一个程序,其特征是脂质积累.
- 表明这些富含脂质的CAF促进瘤血管生成,增强结直肠癌的进展.
结论:
- 突变KRAS (KRAS*) 通过激活富含脂质的CAFs,积极重编程瘤微环境.
- 这种KRAS*驱动的CAF激活促进瘤血管生成和结直肠癌的进展.
- 针对KRAS*下游信号级联或富含脂质的CAF,可能为KRAS*突变结直肠癌提供新的治疗途径.
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