RT Journal Article
SR Electronic
T1 Coexistence of Gilbert syndrome with hereditary haemolytic anaemias
JF Journal of Clinical Pathology
JO J Clin Pathol
FD BMJ Publishing Group Ltd and Association of Clinical Pathologists
SP 663
OP 665
DO 10.1136/jclinpath-2011-200580
VO 65
IS 7
A1 Katarzyna Rawa
A1 Anna Adamowicz-Salach
A1 Michał Matysiak
A1 Anna Trzemecka
A1 Beata Burzynska
YR 2012
UL http://jcp.bmj.com/content/65/7/663.abstract
AB Background Gilbert syndrome is an inherited disease characterised by mild unconjugated hyperbilirubinaemia caused by mutations in UGT1A1 gene which lead to decreased activity of UDP-glucuronosyltransferase 1A1. The most frequent genetic defect is a homozygous TA dinucleotide insertion in the regulatory TATA box in the UGT1A1 gene promoter.Methods and results 182 Polish healthy individuals and 256 patients with different types of hereditary haemolytic anaemias were examined for the A(TA)nTAA motif. PCR was performed using sense primer labelled by 6-Fam and capillary electrophoresis was carried out in an ABI 3730 DNA analyser. The frequency of the (TA)7/(TA)7 genotype in the control group was estimated at 18.13%, (TA)6/(TA)7 at 45.05% and (TA)6/(TA)6 at 36.26%. There was a statistically significant difference in the (TA)6/(TA)6 genotype distribution between healthy individuals and patients with glucose-6-phosphate dehydrogenase deficiency (p=0.041). Additionally, uncommon genotypes, (TA)5/(TA)6, (TA)5/(TA)7 and (TA)7/(TA)8 of the promoter polymorphism, were discovered.Conclusion Genotyping of the UGT1A1 gene showed distinct distribution of the common A(TA)nTAA polymorphism relative to other European populations. Because of a greater risk of hyperbilirubinaemia due to hereditary haemolytic anaemia, the diagnosis of Gilbert syndrome in this group of patients is very important.