Abstract 751: A workflow integrating multi-omics with patient-specific 3D cell models for interrogating precision medicine approaches in clinically-relevant timeframes.

Abstract The complexity and heterogeneity of cancers within and between patients has led to the precision medicine paradigm of cancer therapy where treatment should be personalized to individual patients to achieve maximal outcomes. Large scale endeavours such as the NCI-MATCH study 1 have investigated the benefits of tumor DNA sequencing, in order to best match the patient to a targeted therapy for their cancer. These studies demonstrate improved outcomes with matching approaches, but raise questions about genetic influences on drug resistance, suggesting sequencing alone may not be sufficient to guide molecular targeted therapies. New Approach Methodologies (NAMs) such as tumoroids are patient-derived cancer cells that grow as 3D self-organized, multicellular structures that maintain key characteristics of the patient tumor of origin including genotype and transcriptomic profiles, as well as biological behaviors. These NAMs serve as valuable tools for studying tumor biology and patient-specific responses to various anti-cancer therapies. Here, we utilize the RASTRUMTM Allegro platform from Inventia Life Science and GibcoTM OncoProTM colorectal cancer (CRC) Tumoroid Cell Lines (ThermoFisher Scientific 2) to easily create plug and play patient-derived 3D cell models within synthetic PEG-based hydrogel matrices, which were tuned to mimic the stiffness and ECM composition of CRC tumors. Coupling these biologically-relevant tumoroid models with molecular insights from comprehensive proteomics and transcriptomics characterization, we demonstrate the utility of this workflow for throughput drug screening and determining personalized therapy responses in clinically-relevant timeframes. Our approach provides a scalable framework for evaluating precision medicine approaches using biologically-relevant patient-derived tumoroids. Future work will focus on the development of processes to support direct dissociation and generation of patient-derived models from specimens from a variety of cancer types. Utilization of the RASTRUM platform in these precision medicine workflows to generate real-time drug sensitivity data, could be leveraged to inform clinical treatment decision making. References 1. O’Dwyer P.J. et al. The NCI-MATCH trial: Lessons for precision oncology. Nature Medicine 2024, 29(6):1349-1357. 2. Paul, C.D. et al. Long-term maintenance of patient-specific characteristics in tumoroids from six cancer indications. Scientific Reports 2025, 15(1):3933. Citation Format: Elahe Minaei, Stella Davy, Ali McCorkindale, Peilin Tian, Joanna Wasielewska, Sean Porazinski. A workflow integrating multi-omics with patient-specific 3D cell models for interrogating precision medicine approaches in clinically-relevant timeframes abstract. In: Proceedings of the American Association for Cancer Research Annual Meeting 2026; Part 1 (Regular Abstracts); 2026 Apr 17-22; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2026;86(7 Suppl):Abstract nr 751.