A comprehensive molecular atlas of the cell types in the mouse liver
Pietila, R.; Genove, G.; Mocci, G.; Miao, Y.; Liu, J.; Leptidis, S.; Del Gaudio, F.; Uhrbom, M.; Vazquez-Liebanas, E.; Gustafsson, S.; Buyandelger, B.; Raschperger, E.; Björkegren, J. L. M.; Hansson, E. M.; Gaengel, K.; Mäe, M. A.; Jeansson, M.; Vanlandewijck, M.; He, L.; Strell, C.; Peng, X.-R.; Lendahl, U.; Betsholtz, C.; Muhl, L.
Show abstract
The liver plays a crucial role in essential physiological processes, and its impaired function due to liver fibrosis from various causes is an increasingly significant health issue. The livers functionality relies on the precise arrangement of its cellular structures, yet the molecular architecture of these units remains only partially understood. We created a comprehensive molecular atlas detailing all the major cell types present in the adult mouse liver through deep single-cell RNA sequencing. Our analysis offers new insights into hepatic endothelial and mesenchymal cells, specifically highlighting the differences between the cells of the periportal microvasculature, the sinusoids, and the portal vein, the latter exhibiting a mixed arterio-venous phenotype. We identified distinct subpopulations of hepatic stellate cells, fibroblasts, and vascular mural cells located in different anatomical regions. Comparisons with transcriptomic data from disease models indicate that a previously unrecognized capsular population of hepatic stellate cells expands in response to fibrotic disease. Our findings reveal that various fibroblast subpopulations respond differently to pathological insults. This data resource will be invaluable for advancing therapeutic interventions targeting hepatic diseases.
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