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IL-1 and TNF? Contribute to the Inflammatory Niche to Enhance Alveolar Regeneration.

ABSTRACT: Inflammatory responses are known to facilitate tissue recovery following injury. However, the precise mechanisms that enhance lung alveolar regeneration remain unclear. Here, using an organoid-based screening assay, we find that interleukin-1 (IL-1) and tumor necrosis factor ? (TNF?) enhance the proliferation of AEC2s while maintaining their differentiation capacity. Furthermore, we find that expression of IL-1? and TNF? are induced in the AEC2 niche following influenza-induced injury in vivo, and lineage tracing analysis revealed that surviving AEC2s around the damaged area contribute to alveolar regeneration. Through genetic and pharmacological modulation of multiple components of the IL-1-nuclear factor ?B (NF-?B) signaling axis, we show that cell-intrinsic as well as stromal mediated IL-1 signaling are essential for AEC2 mediated lung regeneration. Taken together, we propose that the IL-1/TNF?-NF-?B signaling axis functions as a component of an inflammation-associated niche to regulate proliferation of surviving AEC2s and promote lung regeneration.

SUBMITTER: Katsura H

PROVIDER: S-EPMC6450459 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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IL-1 and TNFα Contribute to the Inflammatory Niche to Enhance Alveolar Regeneration.

Katsura Hiroaki H Kobayashi Yoshihiko Y Tata Purushothama Rao PR Hogan Brigid L M BLM

Stem cell reports 20190328 4

Inflammatory responses are known to facilitate tissue recovery following injury. However, the precise mechanisms that enhance lung alveolar regeneration remain unclear. Here, using an organoid-based screening assay, we find that interleukin-1 (IL-1) and tumor necrosis factor α (TNFα) enhance the proliferation of AEC2s while maintaining their differentiation capacity. Furthermore, we find that expression of IL-1β and TNFα are induced in the AEC2 niche following influenza-induced injury in vivo, a ...[more]

PMID: 30930244

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Dataset Information

IL-1 and TNF? Contribute to the Inflammatory Niche to Enhance Alveolar Regeneration.

Publications

IL-1 and TNFα Contribute to the Inflammatory Niche to Enhance Alveolar Regeneration.

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