Research output per year
Research output per year
Richard Turkington*, Laura Knight, Jaine Blayney, Maria Secrier, Rosalie Douglas, Eileen Parkes, Eilis Sutton, Leanne Stevenson, Damian McManus, Sophia Halliday, Andrena McCavigan, Gemma Logan, Steven Walker, Christopher Steele, Juliane Perner, Jan Bornscein, Shona MacRae, Ahmad Miremadi, Eamon McCarron, Stephen McQuaid
Research output: Contribution to journal › Article › peer-review
OBJECTIVE: Current strategies to guide selection of neoadjuvant therapy in oesophageal adenocarcinoma (OAC) are inadequate. We assessed the ability of a DNA damage immune response (DDIR) assay to predict response following neoadjuvant chemotherapy in OAC.
DESIGN: Transcriptional profiling of 273 formalin-fixed paraffin-embedded prechemotherapy endoscopic OAC biopsies was performed. All patients were treated with platinum-based neoadjuvant chemotherapy and resection between 2003 and 2014 at four centres in the Oesophageal Cancer Clinical and Molecular Stratification consortium. CD8 and programmed death ligand 1 (PD-L1) immunohistochemical staining was assessed in matched resection specimens from 126 cases. Kaplan-Meier and Cox proportional hazards regression analysis were applied according to DDIR status for recurrence-free survival (RFS) and overall survival (OS).
RESULTS: A total of 66 OAC samples (24%) were DDIR positive with the remaining 207 samples (76%) being DDIR negative. DDIR assay positivity was associated with improved RFS (HR: 0.61; 95% CI 0.38 to 0.98; p=0.042) and OS (HR: 0.52; 95% CI 0.31 to 0.88; p=0.015) following multivariate analysis. DDIR-positive patients had a higher pathological response rate (p=0.033), lower nodal burden (p=0.026) and reduced circumferential margin involvement (p=0.007). No difference in OS was observed according to DDIR status in an independent surgery-alone dataset.DDIR-positive OAC tumours were also associated with the presence of CD8+ lymphocytes (intratumoural: p<0.001; stromal: p=0.026) as well as PD-L1 expression (intratumoural: p=0.047; stromal: p=0.025).
CONCLUSION: The DDIR assay is strongly predictive of benefit from DNA-damaging neoadjuvant chemotherapy followed by surgical resection and is associated with a proinflammatory microenvironment in OAC.
Original language | English |
---|---|
Pages (from-to) | 1918-1927 |
Number of pages | 10 |
Journal | Gut |
Volume | 68 |
Issue number | 11 |
Early online date | 09 Mar 2019 |
DOIs | |
Publication status | Early online date - 09 Mar 2019 |
Student thesis: Doctoral Thesis › Doctor of Philosophy
Student thesis: Doctoral Thesis › Doctor of Philosophy
Student thesis: Doctoral Thesis › Doctor of Philosophy
Person: Academic
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Meeting abstract › peer-review