Implementation of CYP2D6 copy-number imputation panel and frequency of key pharmacogenetic variants in Finnish individuals with a psychotic disorder

Katja Häkkinen, Johanna I. Kiiski, Markku Lähteenvuo, Tuomas Jukuri, Kimmo Suokas, Jussi Niemi-Pynttäri, Tuula Kieseppä, Teemu Männynsalo, Asko Wegelius, Willehard Haaki, Kaisla Lahdensuo, Risto Kajanne, Mari A. Kaunisto, Annamari Tuulio-Henriksson, Olli Kampman, Jarmo Hietala, Juha Veijola, Jouko Lönnqvist, Erkki Isometsä, Tiina PaunioJaana Suvisaari, Eija Kalso, Mikko Niemi, Jari Tiihonen, Mark Daly, Aarno Palotie, Ari V. Ahola-Olli

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Abstract

We demonstrate that CYP2D6 copy-number variation (CNV) can be imputed using existing imputation algorithms. Additionally, we report frequencies of key pharmacogenetic variants in individuals with a psychotic disorder from the genetically bottle-necked population of Finland. We combined GWAS chip and CYP2D6 CNV data from the Breast Cancer Pain Genetics study to construct an imputation panel (n = 902) for CYP2D6 CNV. The resulting data set was used as a CYP2D6 CNV imputation panel in 9262 non-related individuals from the SUPER-Finland study. Based on imputation of 9262 individuals we confirm the higher frequency of CYP2D6 ultrarapid metabolizers and a 22-fold enrichment of the UGT1A1 decreased function variant rs4148323 (UGT1A1*6) in Finland compared with non-Finnish Europeans. Similarly, the NUDT15 variant rs116855232 was highly enriched in Finland. We demonstrate that imputation of CYP2D6 CNV is possible and the methodology enables studying CYP2D6 in large biobanks with genome-wide data.

Original languageEnglish
Number of pages7
JournalPHARMACOGENOMICS JOURNAL
Volume22
Issue number3
DOIs
Publication statusPublished - 2022
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Molecular Medicine
  • Genetics
  • Pharmacology

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