PuSH - Publikationsserver des Helmholtz Zentrums München: Epithelial-stromal cell interactions and extracellular matrix mechanics drive the formation of airway-mimetic tubular morphology in lung organoids.

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Güney, T. ; Herranz, A.M.* ; Mumby, S.* ; Dunlop, I.E.* ; Adcock, I.M.*

Epithelial-stromal cell interactions and extracellular matrix mechanics drive the formation of airway-mimetic tubular morphology in lung organoids.

iScience 24:103061 (2021)

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Complex human airway cellular organization where extracellular matrix (ECM) and epithelial and stromal lineages interact present challenges for organ study in vitro. Current in vitro lung models that focus on the lung epithelium do not represent complex airway morphology and cell-ECM interactions seen in vivo. Models including stromal populations often separate them via a semipermeable barrier precluding cell-cell interaction or the effect of ECM mechanics. We investigated the effect of stromal cells on basal epithelial cell-derived bronchosphere structure and function through a triple culture of human bronchial epithelial, lung fibroblast, and airway smooth muscle cells. Epithelial-stromal cross-talk resulted in epithelial cell-driven branching tubules with stromal cells surrounding epithelial cells termed bronchotubules. Agarose- Matrigel scaffold (Agrigel) formed a mechanically tuneable ECM, with adjustable viscoelasticity and stiffness enabling long-term tubule survival. Bronchotubule models may enable research into how epithelial-stromal cell and cell-ECM communication drive tissue patterning, repair, and development of disease.

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