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- W3089517941 abstract "Abstract Immune checkpoint inhibitors (ICI) produce durable responses in some melanoma patients, but many patients derive no clinical benefit, and the molecular underpinnings of such resistance remain elusive. Here, we leveraged single-cell RNA-seq (scRNA-seq) from 33 melanoma tumors and computational analyses to interrogate malignant cell states that promote immune evasion. We identified a resistance program expressed by malignant cells that is associated with T-cell exclusion and immune evasion. The program is expressed prior to immunotherapy, characterizes cold niches in situ, and predicts clinical responses to anti-PD-1 therapy in an independent cohort of 112 melanoma patients. CDK4/6-inhibition represses this program in individual malignant cells, induces senescence, and reduces melanoma tumor outgrowth in mouse models in vivo when given in combination with immunotherapy. Our study provides a high-resolution landscape of ICI resistant cell states, identifies clinically predictive signatures, and suggests new therapeutic strategies to overcome immunotherapy resistance. This study will be published on Nov. 1st in Cell (Jerby-Arnon et al., Cell 2018). This abstract is also being presented as Poster A25. Citation Format: Parin Shah, Michael Cuoco, Mei-Ju Su, Johannes Melms, Rachel Leeson, Abhay Kanodia, Shaolin Mei, Jia-Ren Lin, Shu Wang, Bokang Rabasha, David Liu, Alex K. Shalek, Itay Tirosh, Peter K. Sorger, Kai Wucherpfennig, Eliezer M. Van Allen, Dirk Schadendorf, Bruce E. Johnson, Asaf Rotem, Orit Rozenblatt-Rosen, Levi A. Garraway, Charles H. Yoon, Benjamin Izar, Aviv Regev, Livnat Jerby-Arnon. A cancer cell program promotes T-cell exclusion and resistance to checkpoint blockade [abstract]. In: Proceedings of the AACR Special Conference on Melanoma: From Biology to Target; 2019 Jan 15-18; Houston, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(19 Suppl):Abstract nr PR01." @default.
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- W3089517941 date "2020-10-01" @default.
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- W3089517941 title "Abstract PR01: A cancer cell program promotes T-cell exclusion and resistance to checkpoint blockade" @default.
- W3089517941 doi "https://doi.org/10.1158/1538-7445.mel2019-pr01" @default.
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