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To Modify or Not to...
To Modify or Not to Modify : Allele-Specific Effects of 3’UTR-KCNQ1 Single Nucleotide Polymorphisms on Clinical Phenotype in a Long QT 1 Founder Population Segregating a Dominant-Negative Mutation
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- Winbo, Annika (author)
- Umeå universitet,Pediatrik,Department of Physiology, University of Auckland, Auckland, New Zealand
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- Diamant, Ulla-Britt (author)
- Umeå universitet,Kardiologi
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- Persson, Johan (author)
- Umeå universitet,Pediatrik
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- Jensen, Steen M. (author)
- Umeå universitet,Kardiologi
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- Rydberg, Annika (author)
- Umeå universitet,Pediatrik
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(creator_code:org_t)
- American Heart Association, 2022
- 2022
- English.
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In: Journal of the American Heart Association. - : American Heart Association. - 2047-9980. ; 11:18
- Related links:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- BACKGROUND: There are conflicting reports with regard to the allele-specific gene suppression effects of single nucleotide polymorphisms (SNPs) in the 3’untranslated region (3’UTR) of the KCNQ1 gene in long QT syndrome type 1 (LQT1) populations. Here we assess the allele-specific effects of 3 previously published 3’UTR-KCNQ1’s SNPs in a LQT1 founder population segregating a dominant-negative mutation.METHODS AND RESULTS: Bidirectional sequencing of the KCNQ1’s 3’UTR was performed in the p.Y111C founder population (n=232, 147 genotype positive), with a minor allele frequency of 0.1 for SNP1 (rs2519184) and 0.6 for linked SNP2 (rs8234) and SNP3 (rs107980). Allelic phase was assessed in trios aided by haplotype data, revealing a high prevalence of derived SNP2/3 in cis with p.Y111C (89%). Allele-specific association analyses, corrected using a relatedness matrix, were performed between 3’UTR-KCNQ1 SNP genotypes and clinical phenotypes. SNP1 in trans was associated with a significantly higher proportion of symptomatic phenotype compared with no derived SNP1 allele in trans (58% versus 32%, corrected P=0.027). SNP2/3 in cis was associated with a significantly lower proportion of symptomatic phenotype compared with no derived SNP2/3 allele in cis (32% versus 69%, corrected P=0.010).CONCLUSIONS: Allele-specific modifying effects on symptomatic phenotype of 3’UTR-KCNQ1 SNPs rs2519184, rs8234, and rs107980 were seen in a LQT1 founder population segregating a dominant-negative mutation. The high prevalence of sup-pressive 3’UTR-KCNQ1 SNPs segregating with the founder mutation could contribute to the previously documented low incidence of cardiac events in heterozygous carriers of the p.Y111C KCNQ1 mutation.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Medicinsk genetik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medical Genetics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
Keyword
- arrhythmia and electrophysiology
- molecular cardiology
- genetik
- Genetics
Publication and Content Type
- ref (subject category)
- art (subject category)
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