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Exome array analysis identifies GPR35 as a novel susceptibility gene for anthracycline-induced cardiotoxicity in childhood cancer.

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Ruiz-Pinto, Sara 
Pita, Guillermo 
Patiño-García, Ana 
Alonso, Javier 
Pérez-Martínez, Antonio 

Abstract

OBJECTIVES: Pediatric cancer survivors are a steadily growing population; however, chronic anthracycline-induced cardiotoxicity (AIC) is a serious long-term complication leading to considerable morbidity. We aimed to identify new genes and low-frequency variants influencing the susceptibility to AIC for pediatric cancer patients. PATIENTS AND METHODS: We studied the association of variants on the Illumina HumanExome BeadChip array in 83 anthracycline-treated pediatric cancer patients. In addition to single-variant association tests, we carried out a gene-based analysis to investigate the combined effects of common and low-frequency variants to chronic AIC. RESULTS: Although no single-variant showed an association with chronic AIC that was statistically significant after correction for multiple testing, we identified a novel significant association for G protein-coupled receptor 35 (GPR35) by gene-based testing, a gene with potential roles in cardiac physiology and pathology (P=7.0×10), which remained statistically significant after correction for multiple testing (PFDR=0.03). The greatest contribution to this observed association was made by rs12468485, a missense variant (p.Thr253Met, c.758C>T, minor allele frequency=0.04), with the T allele associated with an increased risk of chronic AIC and more severe symptomatic cardiac manifestations at low anthracycline doses. CONCLUSION: Using exome array data, we identified GPR35 as a novel susceptibility gene associated with chronic AIC in pediatric cancer patients.

Description

Keywords

Adolescent, Anthracyclines, Antineoplastic Agents, Child, Child, Preschool, Exome, Female, Genetic Predisposition to Disease, Heart, Humans, Infant, Leukemia, Male, Osteosarcoma, Receptors, G-Protein-Coupled, Sarcoma, Ewing

Journal Title

Pharmacogenetics and Genomics

Conference Name

Journal ISSN

1744-6872
1744-6880

Volume Title

27

Publisher

Wolters Kluwer
Sponsorship
Cancer Research Uk (None)
Cancer Research UK (16563)
This work was supported by the Spanish Association against Cancer (AECC: Asociación Española contra el Cáncer). Human Genotyping lab is a member of CeGen, PRB2-ISCIII and is supported by grant PT13/0001, of the PE I+D+i 2013-2016, funded by ISCIII and FEDER (Fondo Europeo de Desarrollo Regional). Sara Ruiz-Pinto is a predoctoral fellow supported by the Severo Ochoa Excellence Programme (Project SEV-2011-0191).