title: Monoamine oxidase A gene polymorphisms and enzyme activity associated with risk of gout in Taiwan aborigines.
abstract: Taiwanese aborigines have a high prevalence of hyperuricemia and gout. Uric acid levels and urate excretion have correlated with dopamine-induced glomerular filtration response. MAOs represent one of the major renal dopamine metabolic pathways. We aimed to identify the monoamine oxidase A (MAOA, Xp11.3) gene variants and MAO-A enzyme activity associated with gout risk. This study was to investigate the association between gout and the MAOA single-nucleotide polymorphisms (SNPs) rs5953210, rs2283725, and rs1137070 as well as between gout and the COMT SNPs rs4680 Val158Met for 374 gout cases and 604 controls. MAO-A activity was also measured. All three MAOA SNPs were significantly associated with gout. A synonymous MAOA SNP, rs1137070 Asp470Asp, located in exon 14, was associated with the risk of having gout (P = 4.0 x 10(-5), adjusted odds ratio 1.46, 95% confidence intervals [CI]: 1.11-1.91). We also showed that, when compared to individuals with the MAOA GAT haplotype, carriers of the AGC haplotype had a 1.67-fold (95% CI: 1.28-2.17) higher risk of gout. Moreover, we found that MAOA enzyme activity correlated positively with hyperuricemia and gout (P for trend = 2.00 x 10(-3) vs. normal control). We also found that MAOA enzyme activity by rs1137070 allele was associated with hyperuricemia and gout (P for trend = 1.53 x 10(-6) vs. wild-type allele). Thus, our results show that some MAOA alleles, which have a higher enzyme activity, predispose to the development of gout.
authors.affiliation: Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan. p915013@kmu.edu.tw
authors.forename: Hung-Pin
authors.initials: HP
authors.lastname: Tu
authors.forename: Albert Min-Shan
authors.initials: AM
authors.lastname: Ko
authors.forename: Shu-Jung
authors.initials: SJ
authors.lastname: Wang
authors.forename: Chien-Hung
authors.initials: CH
authors.lastname: Lee
authors.forename: Rod A
authors.initials: RA
authors.lastname: Lea
authors.forename: Shang-Lun
authors.initials: SL
authors.lastname: Chiang
authors.forename: Hung-Che
authors.initials: HC
authors.lastname: Chiang
authors.forename: Tsu-Nai
authors.initials: TN
authors.lastname: Wang
authors.forename: Meng-Chuan
authors.initials: MC
authors.lastname: Huang
authors.forename: Tsan-Teng
authors.initials: TT
authors.lastname: Ou
authors.forename: Gau-Tyan
authors.initials: GT
authors.lastname: Lin
authors.forename: Ying-Chin
authors.initials: YC
authors.lastname: Ko
mesh_terms: D000328:Adult; D000368:Aged; D000483:Alleles; D044466:Asian People / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006073:Gout / Q000201:enzymology / Q000208:ethnology / Q000235:genetics*; D006239:Haplotypes; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D008995:Monoamine Oxidase / Q000235:genetics* / Q000378:metabolism; D020641:Polymorphism, Single Nucleotide; D012307:Risk Factors; D013624:Taiwan; D014527:Uric Acid / Q000097:blood
chemical_list: D014527:Uric Acid; D008995:Monoamine Oxidase