UGT2B7 c.-161C>T polymorphism frequency in Croatian population

Arh Hig Rada Toksikol. 2022 Dec 30;73(4):303-307. doi: 10.2478/aiht-2022-73-3663. eCollection 2022 Dec 1.

Abstract
in English, Croatian

Uridine diphosphate glucuronosyltransferase-2B7 (UGT2B7), enzyme responsible for the elimination of a number of xenobiotics through glucuronidation, is expressed in the gut, kidneys, intestines, and brain. However, data on the frequency of UGT2B7 polymorphisms in the Croatian population are limited. The aim of this study was to assess the frequency of the UGT2B7 c.-161C>T (rs7668258) polymorphism in the Croatian population and to compare it with reported frequencies in other populations. This polymorphism is in complete linkage disequilibrium with the UGT2B7 c.802C>T (UGT2B7*2, rs7439366) variant, which is important in clinical medicine. The study reports data of 501 participants from University Hospital Centre Zagreb. All data were collected and analysed retrospectively. Genotyping was performed by real-time polymerase chain reaction (PCR) using the TaqMan® Drug Metabolism Genotyping Assay for UGT2B7 c.-161C>T (rs7668258). We found that 120 (23.95 %) participants were carriers of the UGT2B7 c.-161CC genotype and 255 (50.9 %) were heterozygous carriers (UGT2B7 c.-161CT), while 126 (25.15 %) were homozygous carriers of the variant allele (UGT2B7 c.-161TT). The frequency of the variant UGT2B7 c.-161C>T allele in this study was T=0.506. The frequency of the UGT2B7 c.-161C>T allelic variants and genotypes in the Croatian population is similar to other European populations.

Najčešći metabolički put konjugacije u ljudi je glukuronidacija zbog svojih različitih i brojnih potencijalnih supstrata. Enzim UGT2B7, kodiran genom UGT2B7, eksprimiran je u bubrezima i crijevima, a aktivan je i u mozgu. Podatci o učestalosti polimorfizma UGT2B7 u hrvatskoj populaciji vrlo su ograničeni. Cilj ovog istraživanja bio je procijeniti učestalost polimorfizma UGT2B7 c.-161C>T (rs7668258), povezanoga s promijenjenom aktivnošću enzima, u hrvatskoj populaciji te ga usporediti s učestalošću u drugim etničkim skupinama. Ovaj je polimorfizam u potpunoj neravnoteži vezanosti s potvrđenom važnom varijantom UGT2B7 c.802C>T (UGT2B7*2, rs7439366) u kliničkoj medicini. Svi ispitanici redovito su upućivani na farmakogenetičko ispitivanje u KBC Zagreb, a svi podatci prikupljani su nekoliko godina i retrospektivno analizirani. Genotipizacija je provedena lančanom reakcijom polimeraze u stvarnom vremenu (PCR) korištenjem TaqMan® testa genotipizacije metabolizma lijekova za UGT2B7 c.-161C>T (rs7668258). Ukupno je bio uključen 501 pacijent: njih 120 (23,95 %) bili su nositelji genotipa UGT2B7 c.-161CC, njih 255 (50,9 %) bili su heterozigotni nositelji (UGT2B7 c.-161CT), a 126 (25,15 %) ispitanika homozigotni nositelji UG2TB7 c.-161TT. Učestalost alela varijante UGT2B7 c.-161C>T u ovom istraživanju bila je T=0,506. Kao zaključak, učestalost alelnih varijanti i genotipova UGT2B7 c.-161C>T u hrvatskoj populaciji u skladu je s ostalim europskim populacijama.

Keywords: UGT2B7; allelic variants; farmakogenetika; genotyping; glucuronidation; glukuronidacija; hrvatsko stanovništvo; pharmacogenetics; polimorfizmi; uridine diphosphate glucuronosyltransferase-2B7.

MeSH terms

  • Croatia
  • Genotype
  • Glucuronosyltransferase* / genetics
  • Glucuronosyltransferase* / metabolism
  • Humans
  • Polymorphism, Single Nucleotide*
  • Retrospective Studies

Substances

  • Glucuronosyltransferase
  • UGT2B7 protein, human