干细胞相关的蛋白质和细胞外矩阵组成的人类心室关节
Annika Thorsell1, Linnéa Sjölin2, Evelin Berger1
1Proteomics Core Facility, Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden.
Cells
|January 8, 2025
概括
人类的心脏是人类的心脏.
科学领域:
- 心血管生物学 心血管生物学
- 干细胞研究 干细胞研究
- 蛋白质组学是指蛋白质组学.
背景情况:
- 人类心脏的再生是缓慢的,人们对其了解甚少.
- 心房结 (AVj) 是一个潜在的干细胞利基.
- 人类AVj的蛋白质组成在很大程度上是未知的.
研究的目的:
- 为了比较AVj和左心室 (LV) 组织中的蛋白质和基因表达.
- 绘制AVj.中细胞外矩阵 (ECM) 和干细胞生物标记物的地图.
- 为了研究AVj作为干细胞利基的潜力.
主要方法:
- 全球定量蛋白质组学和人类心脏活检上的mRNA测序 (n=15).
- 在AVj和LV组织之间对蛋白质和基因的差异表达分析.
- 干细胞相关生物标志物的免疫组织化学.
主要成果:
- 在4904种已识别的蛋白质中,有1138种在AVj和LV之间表达不同.
- AVj蛋白与心肌细胞的发育,分化,增殖,迁移和缺氧有关.
- AVj组织显示出发育信号通路 (TGF-β,TNF,WNT,Notch,FGF) 的表达.
- RNA-seq证实了参与分化,细胞生长,增殖和ECM组织的基因.
- 干细胞生物标志物NPPA和POSTN通过免疫组织化学在AVj中得到证实.
结论:
- 与LV相比,AVj表现出明显的蛋白质和基因表达特征.
- 这些发现支持AVj作为干细胞利基活动的专门微环境.
- AVj的分子特征表明它在心脏发育和再生中的作用.
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