Ontology highlight
ABSTRACT: Background
Combination therapy with radioembolization (yttrium-90)-resin microspheres) followed by nivolumab has shown a promising response rate of 30.6% in a Phase II trial (CA209-678) for advanced hepatocellular carcinoma (HCC); however, the response mechanisms and relevant biomarkers remain unknown.Methods
By collecting both pretreatment and on-treatment samples, we performed multimodal profiling of tissue and blood samples and investigated molecular changes associated with favorable responses in 33 patients from the trial.Results
We found that higher tumor mutation burden, NCOR1 mutations and higher expression of interferon gamma pathways occurred more frequently in responders. Meanwhile, non-responders tended to be enriched for a novel Asian-specific transcriptomic subtype (Kaya_P2) with a high frequency of chromosome 16 deletions and upregulated cell cycle pathways. Strikingly, unlike other cancer types, we did not observe any association between T-cell populations and treatment response, but tumors from responders had a higher proportion of CXCL9+/CXCR3+ macrophages. Moreover, biomarkers discovered in previous immunotherapy trials were not predictive in the current cohort, suggesting a distinctive molecular landscape associated with differential responses to the combination therapy.Conclusions
This study unraveled extensive molecular changes underlying distinctive responses to the novel treatment and pinpointed new directions for harnessing combination therapy in patients with advanced HCC.
SUBMITTER: Kaya NA
PROVIDER: S-EPMC10432632 | biostudies-literature | 2023 Aug
REPOSITORIES: biostudies-literature
Kaya Neslihan Arife NA Tai David D Lim Xinru X Lim Jia Qi JQ Lau Mai Chan MC Goh Denise D Phua Cheryl Zi Jin CZJ Wee Felicia Yu Ting FYT Joseph Craig Ryan CR Lim Jeffrey Chun Tatt JCT Neo Zhen Wei ZW Ye Jiangfeng J Cheung Lawrence L Lee Joycelyn J Loke Kelvin S H KSH Gogna Apoorva A Yao Fei F Lee May Yin MY Shuen Timothy Wai Ho TWH Toh Han Chong HC Hilmer Axel A Chan Yun Shen YS Lim Tony Kiat-Hon TK Tam Wai Leong WL Choo Su Pin SP Yeong Joe J Zhai Weiwei W
Journal for immunotherapy of cancer 20230801 8
<h4>Background</h4>Combination therapy with radioembolization (yttrium-90)-resin microspheres) followed by nivolumab has shown a promising response rate of 30.6% in a Phase II trial (CA209-678) for advanced hepatocellular carcinoma (HCC); however, the response mechanisms and relevant biomarkers remain unknown.<h4>Methods</h4>By collecting both pretreatment and on-treatment samples, we performed multimodal profiling of tissue and blood samples and investigated molecular changes associated with fa ...[more]