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Wallin, Jeffrey J; Bendell, Johanna C; Funke, Roel; Sznol, Mario; Korski, Konstanty; Jones, Suzanne; Hernandez, Genevive; Mier, James; He, Xian; Hodi, F Stephen; Denker, Mitchell; Leveque, Vincent; Cañamero, Marta; Babitski, Galina; Koeppen, Hartmut; Ziai, James; Sharma, Neeraj; Gaire, Fabien; Chen, Daniel S; Waterkamp, Daniel; Hegde, Priti S; McDermott, David F
Nature communications, 08/2016, Letnik: 7, Številka: 1Journal Article
Anti-tumour immune activation by checkpoint inhibitors leads to durable responses in a variety of cancers, but combination approaches are required to extend this benefit beyond a subset of patients. In preclinical models tumour-derived VEGF limits immune cell activity while anti-VEGF augments intra-tumoral T-cell infiltration, potentially through vascular normalization and endothelial cell activation. This study investigates how VEGF blockade with bevacizumab could potentiate PD-L1 checkpoint inhibition with atezolizumab in mRCC. Tissue collections are before treatment, after bevacizumab and after the addition of atezolizumab. We discover that intra-tumoral CD8(+) T cells increase following combination treatment. A related increase is found in intra-tumoral MHC-I, Th1 and T-effector markers, and chemokines, most notably CX3CL1 (fractalkine). We also discover that the fractalkine receptor increases on peripheral CD8(+) T cells with treatment. Furthermore, trafficking lymphocyte increases are observed in tumors following bevacizumab and combination treatment. These data suggest that the anti-VEGF and anti-PD-L1 combination improves antigen-specific T-cell migration.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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