胎儿肝脏造血干细胞与门血管相关
Jalal A Khan1, Avital Mendelson2, Yuya Kunisaki2
1Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research. Albert Einstein College of Medicine, Bronx, NY, USA. Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA. Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
胎儿肝细胞 (Nestin ((+) NG2 ((+)) 在门血管周围形成一个利基,支持造血干细胞 (HSC) 的扩张. 这种血管组织在出生时发生变化,影响HSC迁移.
科学领域:
- 发育生物学
- 血液形成
- 血管生物学
背景情况:
- 已知成人骨髓中支持造血干细胞 (HSC) 的细胞.
- 然而,胎儿肝脏中支持HSC的特定位仍然不太清楚.
研究的目的:
- 阐明支持造血干细胞 (HSC) 扩张的胎儿肝脏的细胞和结构基础.
- 研究周门细胞和门血管在发育过程中的HSC调节中的作用.
主要方法:
- 免疫组织化学识别Nestin ((+) NG2 ((+) 细胞及其与门血管的关联.
- 对血管结构的HSC分布和扩散的分析.
- 门血管 (动脉与静脉) 在出生时的转变过程中的表型特征.
主要成果:
- Nestin ((+) NG2 ((+) 细胞被确定为胎儿肝脏HSC的关键组成部分,与发育的门血管密切相关.
- 这两种Nestin ((+) NG2 ((+) 细胞和HSC都表现出与从脉开始的门血管分支相关的缩放模式.
- 在产后,门血管从动脉转变为静脉表型,随之而来的是周门Nestin ((+) NG2 ((+) 细胞的减少和HSC从这些血管迁移.
结论:
- 胎儿肝脏HSC位围绕周门血管组织,Nestin ((+) NG2 ((+) 细胞在HSC扩张中起着至关重要的作用.
- 由胎盘循环支持的骨质状血管结构对于胎儿肝脏的HSC调节至关重要.
- 在出生时门血管的过渡改变了,导致HSC再分配.
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