Hemochromatosis risk genotype is not associated with colorectal cancer or age at its diagnosis

23andMe Research Team

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3 Scopus citations

Abstract

Homozygotes for the higher penetrance hemochromatosis risk allele, HFE c.845G>A (p.Cys282Tyr, or C282Y), have been reported to be at a 2- to 3-fold increased risk for colorectal cancer (CRC). These results have been reported for small sample size studies with no information about age at diagnosis for CRC. An association with age at diagnosis might alter CRC screening recommendations. We analyzed two large European ancestry datasets to assess the association of HFE genotype with CRC risk and age at CRC diagnosis. The first dataset included 59,733 CRC or advanced adenoma cases and 72,351 controls from a CRC epidemiological study consortium. The second dataset included 13,564 self-reported CRC cases and 2,880,218 controls from the personal genetics company, 23andMe. No association of the common hereditary hemochromatosis (HH) risk genotype and CRC was found in either dataset. The odds ratios (ORs) for the association of CRC and HFE C282Y homozygosity were 1.08 (95% confidence interval [CI], 0.91–1.29; p = 0.4) and 1.01 (95% CI, 0.78–1.31, p = 0.9) in the two cohorts, respectively. Age at CRC diagnosis also did not differ by HFE C282Y/C282Y genotype in either dataset. These results indicate no increased CRC risk in individuals with HH genotypes and suggest that persons with HH risk genotypes can follow population screening recommendations for CRC.

Original languageEnglish (US)
Article number100010
JournalHuman Genetics and Genomics Advances
Volume1
Issue number1
DOIs
StatePublished - Oct 22 2020

Funding

This work was supported by National Human Genome Research Institute (NHGRI; U01HG008657 ). Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO) funding includes that from the National Cancer Institute (NCI) U01 CA137088 , R01 CA059045 , R01201407 , and P30 CA015704 . GECCO genotyping services were provided by the Center for Inherited Disease Research (CIDR; X01-HG008596 and X-01-HG007585 ). CIDR is fully funded through a federal contract from the National Institutes of Health to The Johns Hopkins University, contract HHSN268201200008I . We would like to thank all CRC studies’ and 23andMe research participants and employees for making this work possible. Additional colon cancer consortia acknowledgments are in supplemental acknowledgments . This work was supported by National Human Genome Research Institute (NHGRI; U01HG008657). Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO) funding includes that from the National Cancer Institute (NCI) U01 CA137088, R01 CA059045, R01201407, and P30 CA015704. GECCO genotyping services were provided by the Center for Inherited Disease Research (CIDR; X01-HG008596 and X-01-HG007585). CIDR is fully funded through a federal contract from the National Institutes of Health to The Johns Hopkins University, contract HHSN268201200008I. We would like to thank all CRC studies’ and 23andMe research participants and employees for making this work possible. Additional colon cancer consortia acknowledgments are in supplemental acknowledgments. Where authors are identified as personnel of the International Agency for Research on Cancer/World Health Organization, the authors alone are responsible for the views expressed in this article and they do not necessarily represent the decisions, policy or views of the International Agency for Research on Cancer/World Health Organization. D.R.C. is a paid consultant for UnitedHealth Group Research and Development. H.H. is on the Scientific Advisory Boards of Invitae Genetics, Genome Medical, and Promega. She is a consultant for 23and Me. She conducts collaborative research with Invitae Genetics, Myriad Genetic Laboratories, and Ambry Genetics. She holds stocks in Genome Medical. J.M. P.F. E.K. and members of the 23andMe Research Team are current or former employees of 23andMe and hold stock or stock options in 23andMe. S.B.G. is a founder of Brogent International with equity.

Keywords

  • HFE gene
  • age of onset
  • colon cancer
  • ferritin
  • genetic
  • iron
  • population screening

ASJC Scopus subject areas

  • Molecular Medicine
  • Genetics(clinical)

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