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|Abstract:||Homeostatic programs balance immune protection and self-tolerance. Such mechanisms likely impact autoimmunity and tumor formation, respectively. How homeostasis is maintained and impacts tumor surveillance is unknown. Here, we find that different immune mononuclear phagocytes share a conserved steady-state program during differentiation and entry into healthy tissue. IFNγ is necessary and sufficient to induce this program, revealing a key instructive role. Remarkably, homeostatic and IFNγ-dependent programs enrich across primary human tumors, including melanoma, and stratify survival. Single-cell RNA sequencing (RNA-seq) reveals enrichment of homeostatic modules in monocytes and DCs from human metastatic melanoma. Suppressor-of-cytokine-2 (SOCS2) protein, a conserved program transcript, is expressed by mononuclear phagocytes infiltrating primary melanoma and is induced by IFNγ. SOCS2 limits adaptive anti-tumoral immunity and DC-based priming of T cells in vivo, indicating a critical regulatory role. These findings link immune homeostasis to key determinants of anti-tumoral immunity and escape, revealing co-opting of tissue-specific immune development in the tumor microenvironment.|
|Citation:||Nirschl, Christopher J., Mayte Suárez-Fariñas, Benjamin Izar, Sanjay Prakadan, Ruth Dannenfelser, Itay Tirosh, Yong Liu, Qian Zhu, K. Sanjana P. Devi, Shaina L. Carroll, David Chau, Melika Rezaee, Tae-Gyun Kim, Ruiqi Huang, Judilyn Fuentes-Duculan, George X. Song-Zhao, Nicholas Gulati, Michelle A. Lowes, Sandra L. King, Francisco J. Quintana, Young-suk Lee, James G. Krueger, Kavita Y. Sarin, Charles H. Yoon, Levi Garraway, Aviv Regev, Alex K. Shalek, Olga Troyanskaya, Niroshana Anandasabapathy. "IFNγ-Dependent Tissue-Immune Homeostasis Is Co-opted in the Tumor Microenvironment." Cell 170, no. 1 (2017): 127-141.e15. doi:10.1016/j.cell.2017.06.016|
|Pages:||127 - 141.e15|
|Type of Material:||Journal Article|
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