Volume 68, Issue 7 pp. 740-747
Original Article

Evaluation of a variant in the transcription factor 7-like 2 (TCF7L2) gene and prostate cancer risk in a population-based study

Ilir Agalliu

Ilir Agalliu

Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington

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Miia Suuriniemi

Miia Suuriniemi

Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland

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Ludmila Prokunina-Olsson

Ludmila Prokunina-Olsson

Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland

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Bo Johanneson

Bo Johanneson

Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland

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Francis S. Collins

Francis S. Collins

Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland

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Janet L. Stanford

Janet L. Stanford

Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington

Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, Washington

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Elaine A. Ostrander

Corresponding Author

Elaine A. Ostrander

Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland

Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, 50 South Drive, Room 5351, Bethesda, MD 20892.Search for more papers by this author
First published: 26 February 2008
Citations: 24

Ilir Agalliu and Miia Suuriniemi are contributed equally to this work.

Abstract

Background

Transcription factor 7-like 2 (TCF7L2) is a high mobility group-box containing protein that is a critical member of the Wnt/β-catenin canonical signaling pathway. In addition to its recently recognized role in diabetes, aberrant TCF7L2 expression has been implicated in cancer through regulation of cell proliferation and apoptosis by c-MYC and cyclin D. It has been hypothesized that germline variants within the TCF7L2 gene previously associated with diabetes may affect cancer risk through the Wnt/β-catenin signaling pathway. Specifically, the same risk allele of single nucleotide polymorphism (SNP) rs12255372 that is associated with diabetes (T allele) has recently been associated with an increased risk of breast cancer.

Methods

Here, we investigated associations between rs12255372 and prostate cancer risk among 1,457 cases and 1,351 controls from a population-based study.

Results

The variant TT genotype was not associated with overall prostate cancer risk. However, there was evidence that men homozygous for the variant T allele had an elevated relative risk of more aggressive prostate cancer, as defined by high Gleason score (OR = 1.7, 95% CI = 1.0–2.8) or regional/distant stage (OR = 1.7, 95% CI = 1.1–2.6) disease.

Conclusions

Our findings suggest that this variant in the TCF7L2 gene may be associated with risk of developing more clinically significant disease. These results need to be confirmed, but provide initial evidence that the TCF7L2 gene may alter risk of developing more aggressive prostate cancer. Prostate 68: 740–747, 2008. © 2008 Wiley-Liss, Inc.

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