发育性形态原体将人类诱导的多能干细胞直接导向类似纤维状环状细胞表型的细胞表型
Ana P Peredo1,2,3, Tonia K Tsinman1,2,3, Edward D Bonnevie2,3
1Department of Bioengineering University of Pennsylvania Philadelphia Pennsylvania USA.
JOR spine
|January 29, 2024
概括
人类诱导的多能干细胞 (iPSCs) 可以被引导到类似于annulus fibrosus (AF) 的命运. 结合TGF-β3和PDGF-BB可显著增加关键AF基因和蛋白质表达,用于潜在的细胞疗法.
科学领域:
- 再生医学是一种再生医学.
- 干细胞生物学 干细胞生物学
- 整形外科的研究研究.
背景情况:
- 椎间盘的治疗受限于内源性纤维环 (AF) 细胞的再生能力较差.
- 开发用于AF损伤的基于细胞的疗法需要理想的外源细胞源和有效的分化协议.
- 人类诱导的多能干细胞 (iPSCs) 为再生策略提供了一个有前途的细胞来源,但需要特定的差异化线索来诱导AF命运.
研究的目的:
- 为了确定诱导人类iPSC分化到类似AF的细胞表型的信号因子.
- 建立一个有效的协议,从iPSCs生成AF类细胞,用于潜在的治疗应用.
- 为了研究与AF与iPSC差异化相关的基因表达和蛋白质生产变化.
主要方法:
- 从iPSC衍生的硬质瘤细胞接受了包括TGF-β3,CTGF,PDGF-BB和IGF-1在内的生长因子组合的治疗.
- 使用96.96 Fluidigm基因表达阵列评估了AF相关的细胞外基因 (ECM) 基因的基因表达.
- 量化了关键ECM组件的蛋白质沉积,以验证基因表达的发现.
主要成果:
- TGF-β3与PDGF-BB,CTGF或IGF-1的组合在iPSC衍生性硬质瘤细胞中的关键AFECM基因上调.
- 用TGF-β3和PDGF-BB治疗14天显著增强了原II和aggrecan基因表达.
- 这种特定的组合也增加了原I和弹性蛋白的蛋白质沉积,将细胞形状转向成熟的AF细胞.
结论:
- 这项研究提出了一种新的方法,利用特定的生物化学信号,将人类iPSC引导到类似AF的细胞命运中.
- TGF-β3和PDGF-BB的组合显示出诱导AF特异性基因和蛋白质表达的显著潜力.
- 这些发现为开发基于iPSC的细胞递送策略为annulus纤维修复奠定了基础.
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