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用Frizzled特异性激动剂进行向膜再生

Ahmad N Nabhan¹, Joshua D Webster², Jarret J Adams³

¹Department of Physiological Chemistry, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.

|June 15, 2023

概括

科学家探索了肺干细胞中的Wnt信号,发现特定的Frizzled受体控制着不同的细胞类型. 这揭示了受伤后肺部再生的潜在策略,而不会导致纤维化.

科学领域:

细胞生物学
发育生物学
复原医学

背景情况:

Wnt配体和Frizzled (Fzd) /Lrp5/6受体调节不同物种的干细胞活动.
在一个器官内的不同干细胞群体中选择性激活Wnt信号尚不清楚.

研究的目的:

研究肺干细胞群体中Wnt受体的差异表达和功能.
探索针对肺再生的Wnt通路激活的策略.

主要方法:

在肺上皮细胞,内皮细胞和脑膜细胞中分析显著的Wnt受体表达.
使用Fzd-Lrp激动剂激活特定类型的肺干细胞中的正规Wnt信号.
评估Fzd激动剂对小鼠肺损伤后干细胞活动和命运决定的影响.

主要成果:

不同的Fzd受体 (Fzd5/6,Fzd4,Fzd1) 被不同类型的肺细胞表达.
Fzd5对膜上皮干细胞活动至关重要,而纤维细胞则使用其他Fzd受体.
在受伤后,Fzd5和Fzd6激动剂都刺激了膜上皮干细胞活动和存活率.
Fzd6激动剂在呼吸道原始体中独特地促进了气膜命运,表明细胞类型特异性反应.

结论:

不同的Wnt受体表达决定了肺干细胞的Wnt信号特异性.
针对性激活Fzd5或Fzd6为肺再生提供了潜在的治疗策略.
选择性Wnt通路调节可以促进无纤维化并发症的肺部修复.

关键词:

有的美国大气泡一个肺进行再生

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