导管内小胞性粘性新生体细胞可塑性与重复元素失调有关
bioRxiv : the preprint server for biology
|December 3, 2025
概括
空间转录学揭示了导管内皮质粘膜性瘤 (IPMNs) 中的分子连续体,这表明它们具有共同的胃起源. 重复RNA表达与更高度的发育不良相关,为IPMN进展提供了潜在的生物标志物.
科学领域:
- 胰腺瘤学 胰腺瘤学
- 分子病理学分子病理学
- 空间转录组学 空间转录组学
背景情况:
- 导管内皮质粘膜瘤 (IPMNs) 是一种前入侵性胰腺病变,具有不同程度的进发风险,可能导致入侵性癌症.
- 异常的重复元素表达与胰腺癌中的细胞状态变化有关.
研究的目的:
- 通过空间转录学来研究IPMN组织学亚型,重复元素失调和分子概况之间的关系.
- 了解IPMN中的细胞群及其分子特征.
主要方法:
- 对52个IPMN病变进行了全转录组空间分析 (GeoMx) 和单细胞空间分子成像 (CosMx).
- 定制的重复元素探头 (LINE1,HSATII,HERVK,HERVH) 用于GeoMx和CosMx分析.
- 单细胞转录轨迹分析被用来绘制细胞关系.
主要成果:
- 不同的IPMN亚型 (胰腺胆,肠道,胃) 显示为特定的上皮类型和免疫透物的丰富.
- 在所有IPMN表型中观察到高水平的重复RNA,在高等级的发育不良中增加.
- 转录轨迹分析显示,从胃类型向肠道和胰腺胆类型的表型的进展,与增加的发育不良和重复RNA表达有关.
结论:
- 空间转录学确定了IPMN亚型之间的分子连续,支持一个共同的胃类型起源.
- 在IPMN中,细胞状态可塑性与重复元素表达有关,这表明它有可能成为疾病进展的生物标志物.
- 重复RNA表达,与其他转录标记一起,可能有助于监测IPMN进展.
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