Conference Proceedings
Direct evidence of a clonal and tumor-directed T cell response to prostate cancer brachytherapy.
Scott Williams, Simon Keam, Heloise Halse, Catherine Mitchell, Franco Caramia, David Byrne, Sue Haupt, Georgina Ryland, Phil Darcy, Shahneen Kaur Sandhu, Piers Blombery, Ygal Haupt, Paul J Neeson
JOURNAL OF CLINICAL ONCOLOGY | AMER SOC CLINICAL ONCOLOGY | Published : 2019
Abstract
22 Background: We characterised the immune response in human prostate cancer (PC) to high dose rate brachytherapy (HDRBT) using serial pre- and post-HDRBT biopsies. Methods: Prostate biopsies and peripheral blood samples were obtained from 9 men with clinically localised PC at baseline and again 14 days following a 10 Gy fraction of HDRBT. Immune infiltrates were characterised using multiplex immunohistology (T cell and pan-immune panels) and targeted gene expression profiling (Nanostring pan-cancer immune panel). T cell repertoire was assessed using T cell receptor (TCR) Vbeta CDR3 deep sequencing. Results: HDRBT induced profound but heterogenous immune responses. At the extremes, one pati..
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