Spatial profiling of human immune cells in sarcoidosis

Sarcoidosis is a multiorgan inflammatory disease that is characterized by tissue granulomas and remains so challenging for clinicians to diagnose that it has been called “the great imitator”. Here, by performing single-cell sequencing and spatial transcriptomics on skin granulomas from sarcoid and non-sarcoid patients, we discovered increased recruitment of innate lymphoid cells in granulomas. Sarcoid-associated cells exhibited increased cell migration compared to healthy individuals. Importantly, granuloma formation was attenuated in mice genetically lacking these cells or treated with a pharmacologic inhibitor. Overall design: scRNA-seq of Human skin cells