Alveolar regeneration following viral infection is independent of tuft cells
Que, J.; Huang, H.; Jiang, M.; Zhang, Y.; Biermann, J.; Melms, J. C.; Danielsson, J.; Fang, Y.; Yang, Y.; Qiang, L.; Liu, J.; Zhou, Y.; Wang, M.; Hu, Z.; Wang, T.; Saqi, A.; Sun, J.; Matsumoto, I.; Cardoso, W. V.; Emala, C.; Zhu, J.; Izar, B.; Mou, H.
Show abstract
Severe injuries following viral infection cause lung epithelial destruction with the presence of ectopic basal progenitor cells (EBCs), although the exact function of EBCs remains controversial. We and others previously showed the presence of ectopic tuft cells in the disrupted alveolar region following severe influenza infection. Here, we further revealed that the ectopic tuft cells are derived from EBCs. This process is amplified by Wnt signaling inhibition but suppressed by Notch inhibition. Further analysis revealed that p63-CreER labeled population de novo arising during regeneration includes alveolar epithelial cells when Tamoxifen was administrated after viral infection. The generation of the p63-CreER labeled alveolar cells is independent of tuft cells, demonstrating segregated differentiation paths of EBCs in lung repair. EBCs and ectopic tuft cells can also be found in the lung parenchyma post SARS-CoV-2 infection, suggesting a similar response to severe injuries in humans.
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