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. 2014 Jun 9:4:5227.
doi: 10.1038/srep05227.

Common dysfunctional variants of ABCG2 have stronger impact on hyperuricemia progression than typical environmental risk factors

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Common dysfunctional variants of ABCG2 have stronger impact on hyperuricemia progression than typical environmental risk factors

Akiyoshi Nakayama et al. Sci Rep. .

Abstract

Gout/hyperuricemia is a common multifactorial disease having typical environmental risks. Recently, common dysfunctional variants of ABCG2, a urate exporter gene also known as BCRP, are revealed to be a major cause of gout/hyperuricemia. Here, we compared the influence of ABCG2 dysfunction on serum uric acid (SUA) levels with other typical risk factors in a cohort of 5,005 Japanese participants. ABCG2 dysfunction was observed in 53.3% of the population investigated, and its population-attributable risk percent (PAR%) for hyperuricemia was 29.2%, much higher than those of the other typical environmental risks, i.e. overweight/obesity (BMI ≥ 25.0; PAR% = 18.7%), heavy drinking (>196 g/week (male) or >98 g/week (female) of pure alcohol; PAR% = 15.4%), and aging (≥60 years old; PAR% = 5.74%). SUA significantly increased as the ABCG2 function decreased (P = 5.99 × 10(-19)). A regression analysis revealed that ABCG2 dysfunction had a stronger effect than other factors; a 25% decrease in ABCG2 function was equivalent to "an increase of BMI by 1.97-point" or "552.1 g/week alcohol intake as pure ethanol" in terms of ability to increase SUA. Therefore, ABCG2 dysfunction originating from common genetic variants has a much stronger impact on the progression of hyperuricemia than other familiar risks. Our study provides a better understanding of common genetic factors for common diseases.

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Conflict of interest statement

There is potential competing interest: H.M., T.N., T. Takada, K.I. and N.S. have a patent pending based on the work reported in this paper. The other authors declare that they have no conflict of interest.

Figures

Figure 1
Figure 1. Population-attributable risk percent (PAR%) of ABCG2 dysfunction for hyperuricemia in 5,005 participants.
For the boxes, the red shaded area means PAR% of ABCG2 dysfunction; the width represents the frequency of ABCG2 dysfunction in the population, and the height shows the risk ratio.
Figure 2
Figure 2. Serum uric acid (SUA) levels according to each ABCG2 function.
All bars show mean ± s.e.m.

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