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Sarcoma microenvironment cell states and ecosystems are associated with prognosis and predict response to immunotherapy.
Sarcoma microenvironment cell states and ecosystems are associated with prognosis and predict response to immunotherapy. Nature cancer Subramanian, A., Nemat-Gorgani, N., Ellis-Caleo, T. J., van IJzendoorn, D. G., Sears, T. J., Somani, A., Luca, B. A., Zhou, M. Y., Bradic, M., Torres, I. A., Oladipo, E., New, C., Kenney, D. E., Avedian, R. S., Steffner, R. J., Binkley, M. S., Mohler, D. G., Tap, W. D., D'Angelo, S. P., van de Rijn, M., Ganjoo, K. N., Bui, N. Q., Charville, G. W., Newman, A. M., Moding, E. J. 2024Abstract
Characterization of the diverse malignant and stromal cell states that make up soft tissue sarcomas and their correlation with patient outcomes has proven difficult using fixed clinical specimens. Here, we employed EcoTyper, a machine-learning framework, to identify the fundamental cell states and cellular ecosystems that make up sarcomas on a large scale using bulk transcriptomes with clinical annotations. We identified and validated 23 sarcoma-specific, transcriptionally defined cell states, many of which were highly prognostic of patient outcomes across independent datasets. We discovered three conserved cellular communities or ecotypes associated with underlying genomic alterations and distinct clinical outcomes. We show that one ecotype defined by tumor-associated macrophages and epithelial-like malignant cells predicts response to immune-checkpoint inhibition but not chemotherapy and validate our findings in an independent cohort. Our results may enable identification of patients with soft tissue sarcomas who could benefit from immunotherapy and help develop new therapeutic strategies.
View details for DOI 10.1038/s43018-024-00743-y
View details for PubMedID 38429415
View details for PubMedCentralID 4486342