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A Y chromosomal influence on prostate cancer risk: the multi-ethnic cohort study
S Paracchini1, C L Pearce, L N Kolonel
1Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.
Background:
A Y chromosomal role in prostate cancer has previously been suggested by both cytogenetic findings and patterns of Y chromosomal gene expression. We took advantage of the well established and stable phylogeny of the non-recombining segment of the Y chromosome to investigate the association between Y chromosomal DNA variation and prostate cancer risk.
Methods:
We examined the distribution of 116 Y lineages in 930 prostate cancer cases and 1208 controls from four ethnic groups from a cohort study in Hawaii and California.
Results:
One lineage, found only among the Japanese group in our study, was associated with a statistically significant predisposition to prostate cancer (odds ratio (OR) = 1.63; 95% confidence interval (CI) 1.07 to 2.47), and, in particular, to high severity disease in younger individuals (OR = 3.89; 95% CI 1.34 to 11.31).
Conclusions:
This finding suggests that a Y chromosomal factor contributes significantly to the development of prostate cancer in Japanese men.
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