Abstract
Background
Comprehensive analyses of cancer-related genomic alterations are expected to lead to increased availability of targeted therapies. However, in patients with gastrointestinal (GI) cancers, the utility of genomic profiling is unclear because of common non-druggable alterations and rapid disease progression that prevent a sufficient time period to seek targets.
Objective
The aim of this study was to determine the utility of genomic profiling tests in patients with GI cancers.
Methods
The subjects of this retrospective study were patients with GI cancers and patients with non-GI cancers who underwent tissue-based genomic profiling at a single institution from April 2017 to October 2020. The profile of gene alterations, frequency of tumor mutational burden-high (≥ 10 Muts/Mb), and accessibility of recommended molecular targeted therapy were compared between patients with GI cancers and patients with non-GI cancers.
Results
In all, 133 patients with GI cancers and 63 patients with non-GI cancers were included. The genomic profiles of GI cancers showed the highest frequencies of TP53, KRAS, and APC mutations and a significantly lower frequency of PIK3CA mutations than those of non-GI cancers. Tumor mutational burden-high was significantly less prevalent in GI cancers (4% vs 20%, p = 0.008). Twenty-nine patients with GI cancers (40%) and 35 patients with non-GI cancers (56%) were recommended for targeted therapies based on the findings. Among them, seven patients each with GI cancers and non-GI cancers received the recommended therapy on their genomic findings, which showed similar treatment accessibility between the GI and non-GI cancer groups (10% vs 11%, p = 0.791). HER2-targeted and BRAF-targeted therapies were the primary treatments administered to patients with GI cancers.
Conclusions
Although their genomic profiles revealed fewer druggable sites, patients with GI cancers accessed targeted therapies similarly to patients with non-GI cancers. The utility of genomic profile testing in patients with GI cancers was highlighted to determine if patients can receive specific treatments, such as HER2-targeted and BRAF-targeted therapies.
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Acknowledgements
The authors thank the investigators of the SCRUM-Japan GI-SCREEN study for their operation and data management. They also thank Enago (www.enago.jp) for the English language review.
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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Conflicts of Interest/Competing Interests
Takuro Mizukami has received grants from Taiho Pharma, Eli Lilly Japan, and Ono Pharma, and have received honoraria from Taiho Pharma, Chugai Pharma, Bayer Pharma, Merk Serono Pharma, Takeda Pharma, Eli Lilly Japan, Asahi Kasei Pharma Corporation, Otsuka Pharma, Bristol-Myers Squibb, and Ono Pharma. Tomoyo Oguri is an employee of Astra Zeneca K.K. Hiroyuki Takeda, Kiyomi Imoto, Kumiko Umemoto, Ayako Doi, Hiroyuki Arai, Yoshiki Horie, Takashi Ogura, Naoki Izawa, Hiroyuki Yamamoto, Yoshihisa Yamano, and Yu Sunakawa declare that they have no conflicts of interest that might be relevant to the contents of this article.
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This study was approved by the Ethics Committee of St. Marianna University School of Medicine.
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All patients provided written informed consent for genomic analysis and use of their data.
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Authors’ Contributions
HT and KI collected the data and performed the analyses. All authors interpreted the data, contributed to the writing and approved the final manuscript.
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Takeda, H., Imoto, K., Umemoto, K. et al. Clinical Utility of Genomic Profiling Tests in Patients with Advanced Gastrointestinal Cancers. Targ Oncol 17, 177–185 (2022). https://doi.org/10.1007/s11523-022-00871-4
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DOI: https://doi.org/10.1007/s11523-022-00871-4