Journal
CELL REPORTS
Volume 25, Issue 6, Pages 1458-+Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2018.10.047
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Funding
- Merrimack Pharmaceuticals, Inc.
- NIGMS Interdisciplinary Biotechnology Training Program [T32-GM008334]
- NCI [U01-CA215798]
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Tumor ecosystems are composed of multiple cell types that communicate by ligand-receptor interactions. Targeting ligand-receptor interactions (for instance, with immune checkpoint inhibitors) can provide significant benefits for patients. However, our knowledge of which interactions occur in a tumor and how these interactions affect outcome is still limited. We present an approach to characterize communication by ligand-receptor interactions across all cell types in a microenvironment using single-cell RNA sequencing. We apply this approach to identify and compare the ligand-receptor interactions present in six syngeneic mouse tumor models. To identify interactions potentially associated with outcome, we regress interactions against phenotypic measurements of tumor growth rate. In addition, we quantify ligand-receptor interactions between T cell subsets and their relation to immune infiltration using a publicly available human melanoma dataset. Overall, this approach provides a tool for studying cell-cell interactions, their variability across tumors, and their relationship to outcome.
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