Spatial transcriptomic characterization of pathologic niches in IPF.

Area of Science:

• Pulmonary Medicine
• Genomics
• Cell Biology

Background:

• Idiopathic pulmonary fibrosis (IPF) is a progressive lung disease with limited treatment options.
• Single-cell RNA sequencing (scRNA-seq) has advanced IPF research but lacks spatial context.
• Spatial transcriptomics offers gene expression localization within lung tissue.

Purpose of the Study:

• To spatially characterize disease-associated niches in IPF lung tissue.
• To integrate spatial transcriptomics data with an existing IPF scRNA-seq atlas.
• To identify novel therapeutic targets and improve in vitro models for IPF.

Main Methods:

• Profiling IPF and control patient lung tissue using spatial transcriptomics.
• Integrating spatial transcriptomics data with a single-cell RNA sequencing (scRNA-seq) atlas of IPF.
• Analyzing cellular composition and localization within identified disease niches.

Main Results:

• Identification of three distinct disease-associated niches in IPF lungs: a fibrotic niche, an airway macrophage niche, and an immune niche.
• The fibrotic niche contains myofibroblasts and basaloid cells near airways.
• The airway macrophage niche features SPP1+ macrophages, and the immune niche shows lymphoid cell foci near remodeled vessels.

Conclusions:

• Spatial transcriptomics provides crucial cellular and tissue context for IPF.
• The identified IPF niches offer potential targets for antifibrotic drug development.
• This spatial mapping aids in creating more disease-relevant in vitro models for IPF research.