单细胞转录组分析揭示了胰腺神经内分泌瘤中转移相关的PCSK1+神经内分泌亚群
Xiaolei Yin1, Xiaopeng Li2, Lili Mi1
1Department of Gastroenterology, Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
Journal of neuroendocrinology
|August 16, 2025
概括
胰腺神经内分泌瘤 (PNETs) 通过不同的神经内分泌细胞亚群发展. 一个转移丰富的PCSK1+亚群从NEUROD1+细胞中产生,由ATF6调节并受到纤维细胞信号的影响.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 基因组学就是基因组学.
背景情况:
- 胰腺神经内分泌瘤 (PNETs) 是异质的恶性瘤,易发生肝转移.
- 推动PNET进展和转移的细胞机制尚不清楚,特别是在神经内分泌细胞亚群方面.
研究的目的:
- 用单细胞RNA测序研究胰腺神经内分泌瘤的细胞异质性和进展机制.
- 识别与PNET转移相关的不同神经内分泌细胞亚群及其调节性和微环境特征.
主要方法:
- 来自27个PNET样本 (正常组织,原发性瘤,肝转移) 的单细胞RNA测序 (scRNA-seq) 数据的分析.
- 利用拷贝数变化 (CNV) 推断,伪时间轨迹建模 (CytoTRACE2,Monocle3),用于监管网络分析的 SCENIC 和用于细胞间通信的 CellChat.
- 使用大量RNA-seq数据集进行的外部验证.
主要成果:
- 鉴定出一种独特的PCSK1+神经内分泌亚群,富含肝转移,特征是高CNV负担和低差异化.
- 轨迹分析显示,从NEUROD1+ (初级瘤) 到PCSK1+ (转移) 神经内分泌细胞的发育连续.
- ATF6被确定为PCSK1+细胞中的关键调节器,与应激通路相关;纤维细胞被确定为通过CD99和原-整蛋白轴的主要信号源.
结论:
- 在PNET中发现了一种转移丰富的,终端分化的PCSK1+神经内分泌亚群.
- 阐明了与这种转移性亚群相关的调节性 (ATF6) 和微环境 (纤维细胞信号传递) 因素.
- 结果提供了对PNET进展和转移的潜在治疗点的见解.
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