Impact of radiotherapy on the immune landscape in oesophageal adenocarcinoma

Autor: Noel E, Donlon, Maria, Davern, Fiona, O'Connell, Andrew, Sheppard, Aisling, Heeran, Anshul, Bhardwaj, Christine, Butler, Ravi, Narayanasamy, Claire, Donohoe, James J, Phelan, Niamh, Lynam-Lennon, Margaret R, Dunne, Stephen, Maher, Jacintha, O'Sullivan, John V, Reynolds, Joanne, Lysaght
Rok vydání: 2022
Předmět:
Zdroj: World Journal of Gastroenterology. 28:2302-2319
ISSN: 1007-9327
DOI: 10.3748/wjg.v28.i21.2302
Popis: In the contemporary era of cancer immunotherapy, an abundance of clinical and translational studies have reported radiotherapy (RT) and immunotherapies as a viable option for immunomodulation of many cancer subtypes, with many related clinical trials ongoing. In locally advanced disease, chemotherapy or chemoradiotherapy followed by surgical excision of the tumour remain the principal treatment strategy in oesophageal adenocarcinoma (OAC), however, the use of the host immune system to improve anti-tumour immunity is rapidly garnering increased support in the curative setting.To immunophenotype OAC patients' immune checkpoint (IC) expression with and without radiation and evaluate the effects of checkpoint blockade on cell viability.In the contemporary era of cancer immunotherapy, an abundance of studies have demonstrated that combination RT and IC inhibitors (ICIs) are effective in the immunomodulation of many cancer subtypes, with many related clinical trials ongoing. Although surgical excision and elimination of tumour cells by chemotherapy or chemoradiotherapy remains the gold standard approach in OAC, the propagation of anti-tumour immune responses is rapidly garnering increased support in the curative setting. The aim of this body of work was to immunophenotype OAC patients' IC expression with and without radiation and to establish the impact of checkpoint blockade on cell viability. This study was a hybrid combination ofWe identified that conventional dosing and hypofractionated approaches resulted in increased IC expression (PD-1, PD-L1, TIM3, TIGIT)The findings of the current study demonstrate synergistic potential for the use of ICIs and ionising radiation to potentiate established anti-tumour responses in the neoadjuvant setting and is of particular interest in those with advanced disease, adverse features of tumour biology and poor treatment responses to conventional therapies.
Databáze: OpenAIRE