HNF-1alpha G574S is a functional variant with decreased transactivation activity.
Diabet Med
; 23(12): 1295-300, 2006 Dec.
Article
em En
| MEDLINE
| ID: mdl-17116178
ABSTRACT
AIM:
To assess the functional consequence of the hepatocyte nuclear factor 1alpha gene (HNF-1alpha) G574S variant previously proposed as a diabetes susceptibility allele, in a group of Mexican Type 2 diabetic patients with end-stage renal disease (ESRD).METHODS:
The transcriptional activity of the HNF-1alpha G574S recombinant protein on the human insulin promoter was assessed by transfection assays in RINm5f and HepG2 cell lines.RESULTS:
Two unrelated Mexican diabetic patients with no known African ancestry were found to carry the G574S variant. This substitution was not found among unrelated healthy control subjects. Whereas the G574S HNF-1alpha transcription activation of the human insulin promoter was 40% lower than that of the wild-type protein in RINm5f beta cells, no difference was found in a hepatic cell line (HepG2).CONCLUSIONS:
G574S affects the transactivation potential of HNF-1alpha on the insulin promoter in pancreatic beta-cells. Although it has been difficult to prove its role in the development of diabetes in case-control association studies, this variant exhibits functional effects consistent with it being a potential diabetes susceptibility allele.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transativadores
/
Diabetes Mellitus Tipo 2
/
Nefropatias Diabéticas
/
Fator 1-alfa Nuclear de Hepatócito
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
/
Middle aged
País/Região como assunto:
Mexico
Idioma:
En
Revista:
Diabet Med
Ano de publicação:
2006
Tipo de documento:
Article