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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...
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单细胞和空间转录组分析意味着乳腺瘤进展期间免疫抑制微环境的形成.

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科学领域:

  • 在瘤学瘤学.
  • 免疫学 免疫学 免疫学
  • 基因组学就是基因组学.

背景情况:

  • 在位管道癌 (DCIS) 和侵入性管道癌 (IDC) 是乳腺癌进展的关键阶段.
  • 基因组不稳定性,突变和副本数变异率的增加,是瘤发展的标志.
  • 了解瘤进展过程中的细胞状态和细胞间相互作用对于破译癌症演变至关重要.

研究的目的:

  • 为了研究乳腺癌进展期间瘤细胞的进化轨迹.
  • 阐明建立免疫抑制瘤微环境的机制.
  • 分析细胞和分子的变化从管道癌 in situ 侵入性管道癌.

主要方法:

  • 来自13个乳腺癌样本 (DCIS和IDC) 的单细胞测序数据的探索性分析.
  • 利用空间转录学来证实细胞同位化和分子相互作用.
  • 研究了瘤和免疫细胞的基因表达模式.

主要成果:

  • 在从DCIS向IDC的进展过程中,瘤细胞表现出恶性和攻击性增加.
  • T细胞过渡到枯竭的表型,有助于免疫抑制.
  • 瘤细胞表达共抑制性连接体,与免疫细胞受体相互作用,促进免疫抑制的微环境.
  • 空间转录组学验证了瘤和免疫细胞的物理近距离以及关键联体受体对的表达.

结论:

  • 乳腺癌的进展与瘤细胞恶性病变的升级和免疫规避有关.
  • 免疫抑制性瘤微环境的形成是由特定的瘤免疫细胞相互作用驱动的.
  • 这些发现提供了关于免疫抑制在乳腺癌进展中的细胞和分子基础的见解.