Carcinogenesis, Vol. 20, No. 7, 1231-1233,
July 1999
© 1999 Oxford University Press
Molecular Epidemiology And Cancer Prevention |
Interaction between haemochromatosis and transferrin receptor genes in different neoplastic disorders
Department of Medical Genetics,
1 Department of Oncology,
2 Department of Clinical Microbiology,
3 Department of Medicine,
4 Department of Nutritional Research,
5 Department of Surgery and
6 Department of Pathology, Umeå University, S-901 85 Umeå, Sweden
A number of genes are involved in iron metabolism, including the transferrin receptor (TFR) and haemochromatosis (HFE) genes. In previous investigations an increased risk for neoplastic disease has been observed in individuals homo- and heterozygous for hereditary haemochromatosis. The HFE wild-type gene product complexes with the transferrin receptor (TF) and two different HFE mutations (Cys282Tyr and His63Asp) have been found to increase the affinity of TFR for TF and increase cellular iron uptake. In a recent study we found no associations for HFE and TFR separately, but an interaction between HFE and TFR genotypes in multiple myeloma. Individuals carrying the HFE Tyr282 allele (homo- and heterozygotes) in combination with homozygosity for the TFR Ser142 allele had an increased risk. In the present study the same association was found in breast and colorectal cancer. The odds ratio for all three neoplasms combined was 2.0 (95% CI 1.0–3.8). The risk for neoplastic disease was further increased (OR 7.7, 95% CI = 1.0–59.9) when the analysis was restricted to HFE Tyr homozygotes and compound heterozygotes in combination with TFR Ser homozygosity. Thus, an interaction between HFE and TFR alleles may increase the risk for different neoplastic disorders.
Abbreviations: HFE, haemochromatosis gene; HH, hereditary haemochromatosis; TF, transferrin receptor; TFR, transferrin receptor gene; wt, wild-type.
7 To whom correspondence should be addressed. Email: lars.beckman{at}medgenet.umu.se
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