Comparative genomic analysis to identify a signature of sporadic colorectal cancer development in young adults.

Authors

null

Abedalrhman Alkhateeb

Lakehead University, Thunder Bay, ON, Canada

Abedalrhman Alkhateeb , Eesha Atikukke , Akram El Keilani , Tarek A. Elfiki , Julianna Orlando , Dora Cavallo-Medved , Luis Rueda , Andrew Fetz , Anat Ravid-Einy , Lisa A. Porter , Govindaraja Atikukke , Sabeena Misra

Organizations

Lakehead University, Thunder Bay, ON, Canada, University of Windsor, Windsor, ON, Canada, Windsor Regional Hospital, Windsor, ON, Canada, ITOS Oncology, Windsor, ON, Canada, Schulich School of Medicine, Windsor Campus, Western University, Windsor, ON, Canada, University of Western Ontario, Windsor, ON, Canada, University of Windsor, WE-SPARK Health Institute, Windsor, ON, Canada, Hotel-Dieu Grace Healthcare, Windsor, ON, Canada

Research Funding

windsor Cancer Centre Foundation

Background: Young-onset sporadic CRC is an important yet understudied heterogeneous group of aggressive cancers with distinct clinical and histopathological features. There is a steady increase in the incidence of cancer in this group of patients and currently, there are no screening guidelines to identify these patients due to a lack of understanding of the molecular mechanisms driving cancer in this patient group. Introduction: Despite screening guidelines and recent advances in cancer treatment, colorectal cancer (CRC) remains the second most diagnosed cancer and the second and third leading cause of cancer-related mortality in Canadian men and women, respectively [Canadian Cancer Statistics 2017.]. More striking is the rise in incidence of CRC in young adults in the United States [Siegel, R.L., et al, Bailey, C.E., et al., Dozois, E.J., et al., Deen, K.I., et al.], and the expectation that by the year 2030, the incidence rate will increase by 90% in this patient population. Data from the Surveillance and Cancer registry at Cancer Care Ontario shows a similar trend with increased rates in younger adults (ages 30 to 49) by 5.2 per cent per year between 2005 and 2012 [Ontario, C.C., Cancer Fact.]. Moreover, these younger patient groups are often diagnosed with aggressive forms and advanced stages of the disease [Ontario, C.C., Cancer Fact.]. Methods: In this study, using a total of 30 colorectal cancer patient samples from Windsor Regional Hospital Cancer Program, we performed comprehensive targeted gene sequencing to identify single nucleotide variants, small insertions/deletions, copy number variants in over 500 genes that are implicated in cancer. Mean age of the patients in this study was 44 years and only patients without any personal or family history of colon cancer /other malignancies or IBD were enrolled in the study. Results: While identifying previously known colorectal cancer associated genetic variants, our preliminary data shows distinct missense mutations in several genes potentially contributing to the development and progression of cancer in these patients. In addition to showing pathogenic mutations in colorectal cancers associated genes, such as PIK3CA (H1047R, E545K, E545G, R93W, V344A), KRAS (G12V, G12D, A146T) and APC, our study showed recurring missense mutations in several genes including AXIN2, ALK, CDKN1A, MAP3K1, ROS1, EPCAM, KDM5A and AURKA in over 50% of our samples. Conclusions: The genomic profiling performed using biopsies from young colorectal cancer patients through this study provides a unique ability to identify the potential “genomic triggers” for the development and progression of cancer in young sporadic colorectal cancer patients. This information can not only be used to develop targeted treatment options for these patients but also to design new screening protocols as well as optimal surveillance strategies.

Disclaimer

This material on this page is ©2024 American Society of Clinical Oncology, all rights reserved. Licensing available upon request. For more information, please contact licensing@asco.org

Abstract Details

Meeting

2024 ASCO Gastrointestinal Cancers Symposium

Session Type

Poster Session

Session Title

Poster Session C: Cancers of the Colon, Rectum, and Anus

Track

Colorectal Cancer,Anal Cancer

Sub Track

Tumor Biology, Biomarkers, and Pathology

Citation

J Clin Oncol 42, 2024 (suppl 3; abstr 208)

DOI

10.1200/JCO.2024.42.3_suppl.208

Abstract #

208

Poster Bd #

M16

Abstract Disclosures

Similar Abstracts

Abstract

2023 ASCO Annual Meeting

The clinical and genomic characteristics of KRAS G12D mutated cancers.

First Author: Guomin Lin

First Author: Ke He

First Author: Walid Khaled Chatila

Abstract

2024 ASCO Gastrointestinal Cancers Symposium

Association of candidate alterations with primary resistance to KRAS G12D targeting in colorectal cancer.

First Author: Khalid Jazieh