Regeneration of the lung alveolus by an evolutionarily conserved epithelial progenitor.

Regeneration of the lung alveolus by an evolutionarily conserved epithelial progenitor.
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DOI:
10.1038/nature25786
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发表时间:
2018-03-08
期刊:
影响因子:
64.8
通讯作者:
Morrisey EE
Morrisey EE
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zacharias WJ;Frank DB;Zepp JA;Morley MP;Alkhaleel FA;Kong J;Zhou S;Cantu E;Morrisey EE

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严重损伤后恢复正常器官稳态需要功能性组织再生。虽然一些器官(例如肠道)在整个稳态和再生过程中都含有活性干细胞,但更静止的器官(例如肺)通常含有兼性祖细胞,这些祖细胞在损伤后被招募参与再生。在这里,我们发现肺泡 2 型 (AT2) 细胞群中的 Wnt 反应性肺泡上皮祖细胞 (AEP) 谱系充当远端肺中的主要兼性祖细胞。 AEP 在肺泡稳态期间是一个稳定的谱系,但在急性肺损伤后会迅速扩展以再生大部分肺泡上皮。 AEP 表现出独特的转录组、表观基因组和功能表型,对 Wnt 和 Fgf 信号传导具有特异性反应。与其他提出的肺祖细胞不同,人 AEP (hAEP) 可以通过保守细胞表面标记 TM4SF1 的表达直接分离,并且 hAEP 在 3D 类器官中充当功能性人肺泡上皮祖细胞。总之,我们的结果确定 AEP 谱系是进化上保守的肺泡祖细胞,也是人类肺再生策略的新目标。
Functional tissue regeneration is required for restoration of normal organ homeostasis after severe injury. While some organs, such as the intestine, harbor active stem cells throughout homeostasis and regeneration, more quiescent organs like the lung often contain facultative progenitor cells which are recruited after injury to participate in regeneration. Here we show that a Wnt-responsive alveolar epithelial progenitor (AEP) lineage within the alveolar type 2 (AT2) cell population acts as a major facultative progenitor cell in the distal lung. AEPs are a stable lineage during alveolar homeostasis but expand rapidly to regenerate a large proportion of the alveolar epithelium after acute lung injury. AEPs exhibit a distinct transcriptome, epigenome, and functional phenotype with specific responsiveness to Wnt and Fgf signaling. In distinction to other proposed lung progenitor cells, human AEPs (hAEPs) can be directly isolated via expression of the conserved cell surface marker TM4SF1, and hAEPs act as functional human alveolar epithelial progenitor cells in 3D organoids. Together, our results identify the AEP lineage as an evolutionarily conserved alveolar progenitor and a new target for human lung regeneration strategies.
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影响因子: --
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