Wnt 途径诱导了原始干细胞中的原始样子子群,而 NME7AB 则导致了同质的原始样子群
Kevin R Yi1, Jac-Leen S S Nash1, Mark G Carter1
1Minerva Biotechnologies, Waltham, Massachusetts, United States of America.
PloS one
|June 25, 2025
概括
Wnt/β-catenin通路的激活可以诱导一种类似于原始的干细胞状态,增强分化潜力. 这一发现协调了有关干细胞多能性与分化的相互矛盾的报告.
科学领域:
- 干细胞生物学 干细胞生物学
- 发育生物学是发展生物学.
- 信号通道的信号通道.
背景情况:
- 关于Wnt/β-catenin通路在人类干细胞分化与多能性中的作用存在相互矛盾的报道.
- 之前的研究表明,活性β-catenin水平对神经ectoderm和 mesendoderm分化有不同的影响.
- 原始生长因子对Wnt/β-catenin活性和干细胞命运的影响尚不清楚.
研究的目的:
- 为了研究Wnt/β-catenin通路激活是否可以诱导或维持一个原始类型的干细胞状态.
- 调和关于Wnt/β-catenin对干细胞多能性和分化影响的相互矛盾的发现.
- 确定Wnt/β-catenin诱导的原始类细胞对整体分化潜力的影响.
主要方法:
- 培养具有原始生长因子NME7AB的干细胞,以评估Wnt/β-catenin活性和分化.
- 在没有其他生长因子的情况下,用WNT3A (β-catenin激动剂) 对干细胞进行治疗,以诱导类似于先天性的状态.
- 将原始干细胞的分化效率 (有/没有WNT3A预处理) 与原始状态干细胞进行比较.
主要成果:
- 用NME7AB培养的干细胞显示高活性β-catenin,但很容易分化为神经外皮和中皮.
- WNT3A治疗诱导了两个不同的群体:原始类型的OCT4+细胞和OCT4细胞.
- 预处理WNT3A增强了原始干细胞的分化,但原始干细胞表现出优越的分化能力.
- 同质原始干细胞的分化超过了原始细胞的分化,即使在WNT3A预处理后.
结论:
- Wnt/β-catenin通路的激活可以诱导类似于原始干细胞的干细胞状态.
- 原始类细胞的出现解释了关于Wnt/β-catenin在多能性和分化中的作用的相互矛盾的报告.
- 类似于先天的干细胞种群有助于增强分化潜力,特别是在同质的先天培养中.
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