Genetic Risk Factors for Colorectal Cancer in Multiethnic Indonesians

Author:

Yusuf Irawan,Miskad Upik A.,Lusikooy Ronald E.,Arsyad Arham,Irwan Akram,Mathew George,Suriapranata Ivet,Kusuma Rinaldy,Pardamean Bens,Fitra Kacamarga Muhamad,Budiarto Arif,Wawan Cenggoro Tjeng,Pardamean Carissa I.,McMahan Christopher,Joyner Chase,Baurley James W.

Abstract

AbstractPurposeColorectal cancer is a common cancer in Indonesia, yet it has been understudied. We conduct a genome-wide association study focused on evaluation and discovery of colorectal cancer risk factors in Indonesians.MethodsWe administered detailed questionnaires and collecting blood samples from 162 colorectal cancer cases throughout Makassar, Indonesia. We also established a control set of 193 healthy individuals frequency matched by age, sex, and ethnicity. A genome-wide association analysis was performed on 84 cases and 89 controls passing quality control. We evaluated known colorectal cancer genetic variants using logistic regression and established a genome-wide polygenic risk model using a Bayesian variable selection technique.ResultsWe replicate associations for rs9497673, rs6936461 and rs7758229 on chromosome 6; rs11255841 on chromosome 10; and rs4779584, rs11632715, and rs73376930 on chromosome 15. Polygenic modeling identified 10 SNP associated with colorectal cancer risk.ConclusionsThis work helps characterize the relationship between variants in theSCL22A3,SCG5,GREM1, andSTXBP5-AS1genes and colorectal cancer in a diverse Indonesian population. With further biobanking and international research collaborations, variants specific to colorectal cancer risk in Indonesians will be identified.

Publisher

Cold Spring Harbor Laboratory

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