Medium-throughput Drug Screening of Patient-derived Organoids from Colorectal Peritoneal Metastases to Direct Personalized Therapy
Vignesh Narasimhan, Josephine A Wright, Michael Churchill, Tongtong Wang, Rachele Rosati, Tamsin R M Lannagan, Laura Vrbanac, Anne B Richardson, Hiroki Kobayashi, Timothy Price, Gayle X Y Tye, Julie Marker, Peter J Hewett, Michael P Flood, Shalini Pereira, G Adam Whitney, Michael Michael, Jeanne Tie, Siddhartha Mukherjee, Carla Grandori, Alexander G Heriot, Daniel L Worthley, Robert G Ramsay, Susan L Woods, Vignesh Narasimhan, Josephine A Wright, Michael Churchill, Tongtong Wang, Rachele Rosati, Tamsin R M Lannagan, Laura Vrbanac, Anne B Richardson, Hiroki Kobayashi, Timothy Price, Gayle X Y Tye, Julie Marker, Peter J Hewett, Michael P Flood, Shalini Pereira, G Adam Whitney, Michael Michael, Jeanne Tie, Siddhartha Mukherjee, Carla Grandori, Alexander G Heriot, Daniel L Worthley, Robert G Ramsay, Susan L Woods
Abstract
Purpose: Patients with colorectal cancer with peritoneal metastases (CRPMs) have limited treatment options and the lowest colorectal cancer survival rates. We aimed to determine whether organoid testing could help guide precision treatment for patients with CRPMs, as the clinical utility of prospective, functional drug screening including nonstandard agents is unknown.
Experimental design: CRPM organoids (peritonoids) isolated from patients underwent parallel next-generation sequencing and medium-throughput drug panel testing ex vivo to identify specific drug sensitivities for each patient. We measured the utility of such a service including: success of peritonoid generation, time to cultivate peritonoids, reproducibility of the medium-throughput drug testing, and documented changes to clinical therapy as a result of the testing.
Results: Peritonoids were successfully generated and validated from 68% (19/28) of patients undergoing standard care. Genomic and drug profiling was completed within 8 weeks and a formal report ranking drug sensitivities was provided to the medical oncology team upon failure of standard care treatment. This resulted in a treatment change for two patients, one of whom had a partial response despite previously progressing on multiple rounds of standard care chemotherapy. The barrier to implementing this technology in Australia is the need for drug access and funding for off-label indications.
Conclusions: Our approach is feasible, reproducible, and can guide novel therapeutic choices in this poor prognosis cohort, where new treatment options are urgently needed. This platform is relevant to many solid organ malignancies.
Conflict of interest statement
Potential conflicts of interest Outside of the research in this manuscript, TP reports grants from Amgen; MM from Ipsen Australia Pty Ltd, Merck Serono Australia and Amgen Australia Pty Ltd. RGR receives research support from Merck Serono Australia, Invion, Australia and Fisher and Paykel Healthcare, New Zealand. CG has patents pending regarding systems and methods for personalised cancer treatment and drug development. All other authors declare no competing interests.
©2020 American Association for Cancer Research.
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Source: PubMed