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- W2922580456 abstract "Abstract Mechanisms of resistance to immunotherapies are multiple and complex with components intrinsic to the tumor cell and within the immune microenvironment. We review evidence of the interaction of tumor cell signaling pathways with immune pathways and the role this plays in de novo and acquired resistance. The mitogen-activated protein kinase (MAPK) pathway activation and effects on T-cell function are discussed. Phosphoinositide 3-kinase (PI3K) pathway activation (including PTEN loss of function) correlates with T-cell inhibition and immunotherapy resistance. Wnt signaling has been implicated in T-cell function suppression. Key evidence from preclinical models exists for the role of these signaling pathways and is described. Clinical evidence is less advanced though correlation of mutations in key nodes with immune resistance provides a limited clinical correlation. Serial biomarker analysis in patients receiving targeted drugs has been attempted with notable examples including BRAF inhibition in melanoma patients resulting in dynamic changes in programmed death-ligand 1 (PD-L1) expression and tumor-infiltrating lymphocytes. Drug combinations aim to overcome mechanisms of resistance, and recent years have seen numerous combinations of targeted therapies and immune checkpoint inhibitors proposed. However, clear biological rationale and thoughtful trial designs with a translational focus are required to allow such combinations to achieve their full potential." @default.
- W2922580456 created "2019-04-01" @default.
- W2922580456 creator A5014565080 @default.
- W2922580456 creator A5057264457 @default.
- W2922580456 creator A5073795960 @default.
- W2922580456 date "2019-05-01" @default.
- W2922580456 modified "2023-10-18" @default.
- W2922580456 title "Tackling Immunotherapy Resistance: Developing Rational Combinations of Immunotherapy and Targeted Drugs" @default.
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