Journal article

High dose-rate brachytherapy of localized prostate cancer converts tumors from cold to hot

SP Keam, H Halse, T Nguyen, M Wang, N Van Kooten Losio, C Mitchell, F Caramia, DJ Byrne, S Haupt, G Ryland, PK Darcy, S Sandhu, P Blombery, Y Haupt, SG Williams, PJ Neeson

Journal for Immunotherapy of Cancer | BMJ PUBLISHING GROUP | Published : 2020

Abstract

Background Prostate cancer (PCa) has a profoundly immunosuppressive microenvironment and is commonly immune excluded with few infiltrative lymphocytes and low levels of immune activation. High-dose radiation has been demonstrated to stimulate the immune system in various human solid tumors. We hypothesized that localized radiation therapy, in the form of high dose-rate brachytherapy (HDRBT), would overcome immune suppression in PCa. Methods To investigate whether HDRBT altered prostate immune context, we analyzed preradiation versus postradiation human tissue from a cohort of 24 patients with localized PCa that received HDRBT as primary treatment (RadBank cohort). We performed Nanostring imm..

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