对癌细胞的单细胞分析在瘤亚克隆中分别表达的基因中确定了两个监管和功能上不同的类别
Wei Cao1,2, Xuefei Wang1, Kaiwen Luo1
1School of Life Sciences, Southern University of Science and Technology, Shenzhen, China.
Heliyon
|March 25, 2024
概括
这项研究分析了结直肠癌 (CRC) 患者的单细胞数据,揭示了瘤中独特的基因表达模式和细胞-细胞相互作用. 它确定了瘤亚克隆中两种关键类型的差异表达基因 (DEG),影响癌细胞行为.
科学领域:
- 基因组学和分子生物学
- 癌症研究 癌症研究
- 单细胞分析 单细胞分析
背景情况:
- 瘤异质性在理解癌症进展和开发有效治疗方面带来了挑战.
- 单细胞技术使得瘤中细胞多样性的高分辨率分析成为可能.
研究的目的:
- 在结直肠癌 (CRC) 中描述癌细胞和瘤亚克隆的特征.
- 在单细胞水平上研究基因表达,细胞相互作用和拷贝数变异 (CNVs).
- 在瘤亚克隆中识别不同类别的差异表达基因 (DEGs).
主要方法:
- 分析了来自12名结直肠癌患者的101065个单细胞转录组和92个单细胞基因组.
- 在单个癌细胞中识别副本数变异 (CNVs).
- 基因拷贝数和表达水平之间的相关性分析.
- 根据CNVs推断瘤亚克隆和血统轨迹.
- 不同基因表达分析和细胞间通信分析.
主要成果:
- 与正常组织对应物相比,瘤细胞 (癌症,内皮细胞,脑层细胞) 具有更高的基因表达和细胞与细胞相互作用.
- 在癌细胞中观察到基因拷贝数和表达水平之间的相关性.
- 在瘤亚克隆之间确定了两个不同的DEG群体:DEGCNV (高CNV表达相关性,丰富于家政和细胞粘附基因) 和DEGreg (低CNV表达相关性,丰富于细胞因子信号基因).
- DEGCNV与细胞与细胞接触有关,而DEGreg与分泌信号有关,表明它们具有不同的调节和功能作用.
结论:
- 单细胞分析揭示了结直肠瘤内基因表达和细胞相互作用的显著差异.
- 两个功能上不同的类别的DEGs (DEGCNV和DEGreg) 有助于瘤亚克隆多样性和行为.
- 这些发现提供了对驱动结直肠癌异质性和潜在治疗点的分子机制的见解.
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