单细胞测序揭示了人类大脑转移性微环境的景观
Qianqian Song1, Jimmy Ruiz2,3, Fei Xing1
1Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC, USA.
Communications biology
|July 21, 2023
概括
大脑转移是常见的和致命的. 这项研究确定了产生原蛋白的纤维细胞和特定的瘤受体作为关键参与者,为改善脑癌监测和治疗提供了潜在的生物标志物.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
背景情况:
- 大脑转移代表了晚期癌症的重大挑战,存活率很低.
- 有效的生物标志物对于大脑转移的监测和指导治疗策略至关重要.
- 单细胞RNA测序 (scRNA-seq) 提供了对瘤微环境 (TME) 和细胞相互作用的高分辨率见解.
研究的目的:
- 通过使用scRNA-seq.研究大脑转移性TME中的细胞组成和相互作用.
- 确定关键的细胞参与者和驱动大脑转移的分子机制.
- 发现与大脑转移中患者生存相关的潜在生物标志物.
主要方法:
- 使用scRNA-seq.使用5个脑瘤样本 (乳腺癌和肺癌起源) 的10,896个细胞的分析.
- 对瘤内部部件的分析,包括瘤细胞,纤维细胞,髓状细胞和质细胞.
- 在内部和外部数据集中识别和验证与瘤相关的纤维细胞及其信号通路.
主要成果:
- 在不同的大脑转移样本中观察到不同的细胞组成和透模式.
- 具有高I型原蛋白基因表达的瘤相关纤维细胞被确定为TME中的主导相互作用体.
- 这些纤维细胞将TME重塑为富含原-I的基质,可能模仿主要瘤部位.
- 还注意到了髓质细胞中的M1激活和瘤细胞特异性受体与生存的关联.
结论:
- I型原分泌瘤相关纤维细胞是转移性脑瘤的关键调解者.
- 特定的瘤细胞受体与大脑转移和质母细胞瘤患者的存活率有关.
- 这些发现突出了针对性治疗和改善患者治疗结果的潜在生物标志物.
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