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ABSTRACT: Purpose
We hypothesize that the addition of the phosphodiesterase-5 inhibitor tadalafil to the PD-1 inhibitor nivolumab, is safe and will augment immune-mediated antitumor responses in previously untreated squamous cell carcinoma of the head and neck (HNSCC).Patients and methods
We conducted a two-arm multi-institutional neoadjuvant randomized trial in any-stage resectable HNSCC (NCT03238365). Patients were stratified at randomization by human papillomavirus (HPV) status. Patients in both arms received nivolumab 240 mg intravenously on days 1 and 15 followed by surgery on day 28. Those in the combination therapy arm also received tadalafil 10 mg orally once daily for 4 weeks. Imaging, blood, and tumor were obtained pretreatment and posttreatment for correlative analysis.Results
Neoadjuvant therapy was well-tolerated with no grade 3 to 5 adverse events and no surgical delays. Twenty-five of 46 (54%) evaluable patients had a pathologic treatment response of ≥20%, including three (7%) patients with a complete pathologic response. Regardless of HPV status, tumor proliferation rate was a negative predictor of response. A strong pretreatment T-cell signature in the HPV-negative cohort was a predictor of response. Tadalafil altered the immune microenvironment, as evidenced by transcriptome data identifying enriched B- and natural killer cell gene sets in the tumor and augmented effector T cells in the periphery.Conclusions
Preoperative nivolumab ± tadalafil is safe in HNSCC and results in more than 50% of the patients having a pathologic treatment response of at least 20% after 4 weeks of treatment. Pretreatment specimens identified HPV status-dependent signatures that predicted response to immunotherapy while posttreatment specimens showed augmentation of the immune microenvironment with the addition of tadalafil.
SUBMITTER: Luginbuhl AJ
PROVIDER: S-EPMC8898272 | biostudies-literature | 2022 Mar
REPOSITORIES: biostudies-literature
Luginbuhl Adam J AJ Johnson Jennifer M JM Harshyne Larry A LA Linnenbach Alban J AJ Shukla Sanket K SK Alnemri Angela A Kumar Gaurav G Cognetti David M DM Curry Joseph M JM Kotlov Nikita N Antysheva Zoya Z Degryse Sandrine S Mannion Kyle K Gibson Michael K MK Netterville James J Brown Brandee B Axelrod Rita R Zinner Ralph R Tuluc Madalina M Gargano Stacey S Leiby Benjamin E BE Shimada Ayako A Mahoney My G MG Martinez-Outschoorn Ubaldo U Rodeck Ulrich U Kim Young J YJ South Andrew P AP Argiris Athanassios A
Clinical cancer research : an official journal of the American Association for Cancer Research 20220301 5
<h4>Purpose</h4>We hypothesize that the addition of the phosphodiesterase-5 inhibitor tadalafil to the PD-1 inhibitor nivolumab, is safe and will augment immune-mediated antitumor responses in previously untreated squamous cell carcinoma of the head and neck (HNSCC).<h4>Patients and methods</h4>We conducted a two-arm multi-institutional neoadjuvant randomized trial in any-stage resectable HNSCC (NCT03238365). Patients were stratified at randomization by human papillomavirus (HPV) status. Patient ...[more]