Abstract
Whether people who inherit a mutation in MUTYH from only one parent (monoallelic mutation) are at increased risk of colorectal cancer (CRC) remains controversial. Most previous studies and meta-analyses have not found statistically significant associations but, given carriers are relatively rare, may be underpowered to detect small increased risks. We have conducted a systematic review and meta-regression analysis of previously published case–control studies to estimate the strength of association for monoallelic MUTYH mutation and CRC risk. Potential sources of heterogeneity were evaluated. We have compared the carrier frequency in cases with a family history of CRC to that of controls, as a novel and powerful design, to measure statistical evidence of an association but not the strength of association. The magnitude of the genotype-disease association, estimated from a pooled odds ratio comparing cases unselected for family history with controls, was 1.15 (95% CI = 0.98–1.36) and not substantially altered by adjustment for potential sources of heterogeneity. Monoallelic mutation carrier frequency was greater for cases ascertained due to a family history (3.3%; SE 0.9%) than for controls (1.4%; SE 0.3%) (P = 0.02). Monoallelic MUTYH mutation carriers are at increased risk of CRC but the average increase is small.
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Abbreviations
- CRC:
-
Colorectal cancer
- HNPCC:
-
Hereditary non-polyposis colorectal cancer
- MUTYH :
-
Human MutY homologue
- MMR:
-
Mismatch repair
- FAP:
-
Familial adenomatous polyposis
- APC :
-
Adenomatous polyposis coli
- IBD:
-
Inflammatory bowel disease
- CI:
-
Confidence interval
- OR:
-
Odds ratio
- SE:
-
Standard error
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Acknowledgments
The authors thank corresponding authors of the articles involved in this systematic review and meta-regression analysis for providing required information. This work was partly supported by the National Health and Medical Research Council of Australian Government (Grant No. 628836).
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Win, A.K., Hopper, J.L. & Jenkins, M.A. Association between monoallelic MUTYH mutation and colorectal cancer risk: a meta-regression analysis. Familial Cancer 10, 1–9 (2011). https://doi.org/10.1007/s10689-010-9399-5
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DOI: https://doi.org/10.1007/s10689-010-9399-5