Clinically silent LINE 1 insertion in the PNPLA3 gene may impede genotyping of the p.I148M variant

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F27283933%3A_____%2F21%3A00009764" target="_blank" >RIV/27283933:_____/21:00009764 - isvavai.cz</a>

Alternative codes found

RIV/60162694:_____/21:N0000012 RIV/00216208:11110/21:10434361 RIV/00064165:_____/21:10434361

Result on the web

<a href="https://www.nature.com/articles/s41598-021-00425-0.pdf" target="_blank" >https://www.nature.com/articles/s41598-021-00425-0.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-021-00425-0" target="_blank" >10.1038/s41598-021-00425-0</a>

Result language

angličtina

Original language name

Clinically silent LINE 1 insertion in the PNPLA3 gene may impede genotyping of the p.I148M variant

Original language description

The patatin-like phospholipase domain containing 3 (PNPLA3) gene (viz. its I148M variant) is one of the key players in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). We have identified a novel insertion/deletion variant of 1114 bp, localized in the second intron of the PNPLA3 gene, which corresponds to the 3 ‘ terminal sequence of the long-interspersed element (LINE-1). DNA analysis of 122 NAFLD patients and 167 control subjects as well as RNA analysis of 19 liver biopsies revealed that the novel variant is very common (frequency = 0.41), fully linked to the clinically important I148M variant, and clinically silent. Although the LINE-1 insertion does not seem to have any biological effect, it can impede genotyping of the I148M variant. If insertion prevents the attachment of the diagnostic primer, then the non-insertion allele will be selectively amplified; and thus the frequency of the 148M „risk” allele will be significantly overestimated due to the complete linkage of the LINE-1 insertion and the 148I allele of the PNPLA3 gene. Therefore, our findings underline the importance of careful design and consistent documentation of the methodology, including primer sequences. Critical revisions of the results of some studies that have already been reported may therefore be needed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

30219 - Gastroenterology and hepatology

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

6

Pages from-to

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UT code for WoS article

000710192900061

EID of the result in the Scopus database

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