Vol 9: Serum Bilirubin Concentration in Healthy Adult North-Europeans Is Strictly Controlled by the UGT1A1 TA-Repeat Variants.Reportar como inadecuado



 Vol 9: Serum Bilirubin Concentration in Healthy Adult North-Europeans Is Strictly Controlled by the UGT1A1 TA-Repeat Variants.


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This article is from PLoS ONE, volume 9.AbstractThe major enzyme responsible for the glucuronidation of bilirubin is the uridine 5′-diphosphoglucose glucuronosyltransferase A1 UGT1A1 enzyme, and genetic variation in the UGT1A1 gene is reported to influence the bilirubin concentration in the blood. In this study, we have investigated which gene-haplotype variants may be useful for genetic testing of Gilberts syndrome. Two groups of samples based on serum bilirubin concentrations were obtained from the Nordic Reference Interval Project Bio-bank and Database NOBIDA: the 150 individuals with the highest bilirubin 17.5 µmol-L and the 150 individuals with normal bilirubin concentrations TA7 variant in the UGT1A1 promoter and 7 tag-SNPs in an extended promoter region of UGT1A1 haplotype analysis and in selected SNPs in candidate genes SLCO1B3, ABCC2 and NUP153. We found significant odds ratios for high bilirubin level for all the selected UGT1A1 variants. However, in stepwise multivariate logistic regression analysis of all genetic variants together with age, sex, country of origin and fasting time, the repeat variants of UGT1A1 TA6TA7 and SLCO1B3 rs2117032 TC were the only variants significantly associated with higher bilirubin concentrations. Most individuals with high bilirubin levels were homozygous for the TA7-repeat 74% while only 3% were homozygous for the TA7-repeat in individuals with normal bilirubin levels. Among individuals heterozygous for the TA7-repeat, a low frequent UGT1A1-diplotype harboring the rs7564935 G-variant was associated with higher bilirubin levels. In conclusion, our results demonstrate that in testing for Gilberts syndrome, analyzing for the homozygous TA7-TA7-genotype would be appropriate.



Autor: Kringen, Marianne K.; Piehler, Armin P.; Grimholt, Runa M.; Opdal, Mimi S.; Haug, Kari Bente F.; Urdal, Petter

Fuente: https://archive.org/







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