Single-cell map reveals immune-fibrotic imbalance driving COPD

Traditional bulk transcriptomics averages signals across mixed cell populations, obscuring the roles of specific subtypes. Single-cell RNA sequencing overcomes this by profiling gene expression cell by cell, allowing the team to resolve COPD's cellular heterogeneity at unprecedented resolution. The integrated analysis identified four major cell types and 17 distinct subtypes, providing a fine-grained atlas of the cellular landscape underlying persistent airflow limitation and the inflammatory and tissue-remodeling cascade that characterizes the disease.

Cell–cell communication analysis then revealed a striking imbalance in signaling. Macrophages and fibroblasts showed a significant reduction in signaling activity, while certain immune cells displayed enhanced signaling, pointing to immune dysregulation as a pivotal driver of COPD pathogenesis. The authors suggest this immune-fibrotic imbalance reshapes the lung microenvironment: weakened macrophage and fibroblast communication may impair coordination of inflammation control and tissue repair, while heightened signaling among other immune cells sustains inflammatory pressure.

Drilling deeper into macrophage-dominant myeloid cells and fibroblasts, the study uncovered critical roles for these populations in modulating inflammation and driving fibrosis progression, two intertwined processes central to COPD pathology. Beyond cell interactions, the team identified 19 chemicals that may influence COPD progression by modulating gene expression in specific cell populations, offering candidate leads for future mechanistic and therapeutic investigation.

Subject of Research: Single-cell RNA sequencing analysis of immune-fibrotic cell interactions in COPD

Article Title: Single-cell analysis of COPD: Microenvironmental interactions driven by immune-fibrotic imbalance

Article References: Jiang, H., Wang, W., Wang, L., Wu, J., Luo, J., Yan, Q., Gong, X., & Liang, J. (2026). Single-cell analysis of COPD: Microenvironmental interactions driven by immune-fibrotic imbalance. PLOS One, 21(10), e0361580. https://doi.org/10.1371/journal.pone.0361580

Image Credits: AI Generated

DOI: 10.1371/journal.pone.0361580

Keywords: COPD, single-cell RNA sequencing, macrophages, fibroblasts, immune dysregulation, fibrosis, cell-cell communication, lung microenvironment, myeloid cells, transcriptomics, Single-cell, analysis