单细胞转录组学揭示了胆细胞和基底板细胞细胞和热细胞干细胞之间的差异
Robert Morey1,2,3, Francesca Soncin1,2,3, Sampada Kallol1,2,3
1Department of Pathology, School of Medicine, University of California San Diego, La Jolla, 92093, CA, USA.
Research square
|June 30, 2025
概括
人类胎盘细胞细胞 (CTB) 细胞根据位置和妊娠年龄表现出不同的状态. 目前的热原体干细胞 (TSC) 线条类似于偏向于异常热原体 (EVT) 血统的CTB.
科学领域:
- 人类胎盘发育的过程
- 热细胞生物学 热细胞生物学
- 干细胞研究的研究.
背景情况:
- 细胞质细胞 (CTB) 细胞是早期人类胎盘中的双能原始细胞,分化为侵入性外性质细胞 (EVT) 和合成质细胞 (STB).
- trofhoblast干细胞 (TSC) 的细胞起源仍然未被确定,尽管它们具有双潜力.
研究的目的:
- 调查第一季度早期和晚期状CTB (vCTB) 的转录多样性.
- 为了比较vCTB转录形状与热囊细胞干细胞 (TSC).
- 识别不同的CTB状态及其与TSC的关系和差异化潜力.
主要方法:
- 胎盘小组织的单细胞RNA测序 (scRNA-seq) 从早期 (6-8周) 和晚期 (12-14周) 第一季度.
- scRNA-seq和GeoMx从早期胎盘的基底和胆管区域的CTB的空间转录组.
- 在TSC衍生过程中,TSC线和CTB的scRNA-seq.
- 对特定标记物的TSC线的流细胞计分析.
主要成果:
- CTB集群显示出基于妊娠年龄和位置 (基底与胆管板) 的区别.
- 鉴定了热囊细胞状态,包括"初始状态"的vCTB,CTB亚型,前体STB和前体/成熟EVT.
- 在早期的基底板中,CTB的祖先被丰富,基底CTB偏向EVT,胆管CTB偏向STB前体.
- TSC与EVT前体细胞聚集最紧密,并在体外培养过程中丢失了特定的体内标记物 (例如PAGE4).
- ITGA5+ CTB可以在2D培养中形成EVT,但不能形成有机体,而ITGA5- CTB可以在2D培养中形成有机体,但不能形成EVT.
结论:
- 截然不同的CTB状态在胎盘中区域存在,早在怀孕六周.
- 目前的TSC线条在转录上与ITGA5+ CTB相似,偏向于EVT线条.
- 像ITGA5这样的细胞表面标记物区分CTB,具有明显的自我更新和差异化潜力.
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