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- W4387244507 abstract "Abstract Adaptive immune resistance (AIR) is a protective process used by cancer to escape elimination by CD8 + T cells. Inhibition of immune checkpoints PD-1 and CTLA-4 specifically target Interferon-gamma (IFNγ)-driven AIR. AIR begins at the plasma membrane where tumor cell-intrinsic cytokine signaling is initiated. Thus, plasma membrane remodeling by endomembrane trafficking could regulate AIR. Herein we report that the trafficking protein ADP-Ribosylation Factor 6 (ARF6) is critical for IFNγ-driven AIR. ARF6 prevents transport of the receptor to the lysosome, augmenting IFNγR expression, tumor intrinsic IFNγ signaling and downstream expression of immunosuppressive genes. In murine melanoma, loss of ARF6 causes resistance to immune checkpoint blockade (ICB). Likewise, low expression of ARF6 in patient tumors correlates with inferior outcomes with ICB. Our data provide new mechanistic insights into tumor immune escape, defined by ARF6-dependent AIR, and support that ARF6-dependent endomembrane trafficking of the IFNγ receptor influences outcomes of ICB." @default.
- W4387244507 created "2023-10-03" @default.
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- W4387244507 date "2023-10-02" @default.
- W4387244507 modified "2023-10-10" @default.
- W4387244507 title "ARF6-dependent endocytic trafficking of the Interferon-γ receptor drives adaptive immune resistance in cancer." @default.
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- W4387244507 doi "https://doi.org/10.1101/2023.09.29.560199" @default.
- W4387244507 hasPublicationYear "2023" @default.
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