AI Insight
Researchers created a three-dimensional atlas of human lung fibrosis by combining X-ray imaging with spatial molecular analysis to understand how tissue structure influences cellular behavior during disease progression. They discovered that fibrosis begins with the breakdown of alveolar-capillary units, leading epithelial cells to transform into airway-like states while stromal cells form fibrogenic cores that serve as signaling centers driving pathological tissue remodeling. The molecular signatures identified in different tissue states correlated with lung function decline and patient mortality in independent validation cohorts.
Why it matters
This work reveals that lung fibrosis develops through spatially organized tissue states rather than uniform scarring, identifying specific structural transitions and cellular niches that could serve as targets for therapies aimed at halting or reversing disease progression. The atlas-defined molecular signatures may also help predict disease severity and patient outcomes in clinical settings.
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⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
Human lung fibrosis progressively destroys three-dimensional tissue architecture, yet how the structural microenvironment shapes cellular states remains unclear. Integrating 3D X-ray histology with spatial omics, we generate a volumetric multimodal atlas of human lung fibrosis that enables direct interrogation of relationships between tissue microarchitecture and spatial molecular programmes. We identify collapse of the alveolar-capillary unit – the coupled loss of alveolar type 1 epithelial cells, capillary endothelial cells, and basement membrane integrity – as a structural transition associated with early fibrogenesis. Surrounding transitional zones exhibit aberrant epithelial differentiation and proteolytic matrix remodelling, with epithelium shifting toward bronchiolised, airway-like states. Stromal activation converges on spatially restricted fibrogenic cores, sites of maximal collagen maturation and matrix stabilisation that function as signalling hubs within surrounding perifocal and vascular microenvironments. Molecular signatures of atlas-defined tissue states were associated with lung function and mortality across independent patient cohorts. Together, these data support a model in which fibrosis emerges as a spatial tissue-state process, with alveolar-capillary collapse redirecting repair towards mechanically stabilised niches that reinforce pathological remodelling.