Could a combination of heterozygous ABCC8 and KCNJ11 mutations cause congenital hyperinsulinism?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11130%2F17%3A10373481" target="_blank" >RIV/00216208:11130/17:10373481 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00064203:_____/17:10373481

Výsledek na webu

<a href="https://doi.org/10.1515/jpem-2017-0163" target="_blank" >https://doi.org/10.1515/jpem-2017-0163</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/jpem-2017-0163" target="_blank" >10.1515/jpem-2017-0163</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Could a combination of heterozygous ABCC8 and KCNJ11 mutations cause congenital hyperinsulinism?

Popis výsledku v původním jazyce

Background: Congenital hyperinsulinism (CHI) is frequently caused by mutations in one of the K-ATP channel subunits encoded by the genes ABCC8 and KCNJ11. The effect of simultaneous mutations in both of these genes on the pancreatic beta-cell function is not known and patients with CHI carrying both ABCC8 and KCNJ11 mutations have not yet been reported. We questioned if a combination of heterozygous mutations in the ABCC8 and KCNJ11 genes could also lead to beta-cell dysfunction presenting as CHI. Methods: As a model, we used a patient with transient CHI that paternally inherited novel heterozygous mutations in ABCC8 (p.Tyr1293Asp) and KCNJ11 (p.Arg50Trp) genes. The pathogenic effects on the pancreatic beta-cells function were examined in an in vitro functional study using radioactive rubidium efflux assay. Results: We showed that the activation of the mutated K-ATP channels by diazoxide was decreased by 60.9% in the channels with the heterozygous combination of both mutations compared to the wild type channels. This could indicate the pathogenic effect on the pancreatic beta-cell function leading to CHI although conclusive evidence is needed to be added. Conclusions: Our findings may widen the spectrum of genetic causes of CHI and suggest a novel pathogenic mechanism of CHI that must however, be further investigated.

Název v anglickém jazyce

Could a combination of heterozygous ABCC8 and KCNJ11 mutations cause congenital hyperinsulinism?

Popis výsledku anglicky

Background: Congenital hyperinsulinism (CHI) is frequently caused by mutations in one of the K-ATP channel subunits encoded by the genes ABCC8 and KCNJ11. The effect of simultaneous mutations in both of these genes on the pancreatic beta-cell function is not known and patients with CHI carrying both ABCC8 and KCNJ11 mutations have not yet been reported. We questioned if a combination of heterozygous mutations in the ABCC8 and KCNJ11 genes could also lead to beta-cell dysfunction presenting as CHI. Methods: As a model, we used a patient with transient CHI that paternally inherited novel heterozygous mutations in ABCC8 (p.Tyr1293Asp) and KCNJ11 (p.Arg50Trp) genes. The pathogenic effects on the pancreatic beta-cells function were examined in an in vitro functional study using radioactive rubidium efflux assay. Results: We showed that the activation of the mutated K-ATP channels by diazoxide was decreased by 60.9% in the channels with the heterozygous combination of both mutations compared to the wild type channels. This could indicate the pathogenic effect on the pancreatic beta-cell function leading to CHI although conclusive evidence is needed to be added. Conclusions: Our findings may widen the spectrum of genetic causes of CHI and suggest a novel pathogenic mechanism of CHI that must however, be further investigated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30202 - Endocrinology and metabolism (including diabetes, hormones)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Pediatric Endocrinology &amp; Metabolism

ISSN

0334-018X

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

5

Strana od-do

1311-1315

Kód UT WoS článku

000416610500013

EID výsledku v databázi Scopus

2-s2.0-85037078545