Single‐cell transcriptomic analysis on multi‐subtypes of idiopathic inflammatory myopathy reveals pathological hallmarks associated with stromal stem and immune cells in damaged skeletal muscles
Single-cell analysis reveals distinct pathogenic hallmarks in idiopathic inflammatory myopathy subtypes, suggesting new insights into muscle damage.
Key Points
This research focuses on identifying pathogenic characteristics in different subtypes of idiopathic inflammatory myopathies using single-cell transcriptomics.
Conducted single-cell RNA-sequencing on muscle and blood samples from patients and healthy controls.
Performed immunohistochemistry and cell cultures to validate single-cell findings.
Analyzed developmental trajectories of muscle stem and progenitor cells.
Reduced type IIa/x myofiber cells found in more inflammatory IIM subtypes.
Hyperactivation of IFN-I signaling observed specifically in dermatomyositis.
M1-like macrophages identified to interact with muscle cells, contributing to inflammation.