alexa Genetic and clinical characteristics of Korean maturity-onset diabetes of the young (MODY) patients.
Infectious Diseases

Infectious Diseases

Journal of AIDS & Clinical Research

Author(s): Hwang JS, Shin CH, Yang SW, Jung SY, Huh N, Hwang JS, Shin CH, Yang SW, Jung SY, Huh N

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Abstract Maturity-onset diabetes of the young (MODY) is mostly caused by mutations of the hepatocyte nuclear factor (HNF)-1alpha (MODY3) and glucokinase (MODY2) genes in Caucasians. But most Japanese and Chinese MODY patients are not linked to known MODY genes. In this study, we examined the genetic and clinical characteristics of Korean subjects with MODY and early onset type 2 diabetes who had been diagnosed before 15 years of age. The study included 23 unrelated subjects fulfilling the criteria for MODY (three consecutive generations of type 2 diabetes with at least one member diagnosed under the age of 25 year) and 17 unrelated subjects diagnosed with early onset type 2 DM under the age of 15 years. The HNF-4alpha (MODY1), glucokinase (MODY2) and HNF-1alpha (MODY3) genes were analysed by direct sequencing. Mutations in the HNF-1alpha gene were found in two patients (5\%). One of these, P393fsdelC, was novel, and was found in a patient classified in the MODY group. The GCK gene mutation, R191W, was identified in one patient classified as early-onset type 2 DM (2.5\%). No mutations were found in the HNF-4alpha gene, except the T130I variant, which is a known rare polymorphism. In conclusion, the mutations in the HNF-1alpha gene and GCK account for a small proportion, about 5\% and 2.5\%, respectively, in Korean MODY and early onset type 2 patients. The majority of MODY cases in the Korean population are due to defects in unknown genes. This article was published in Diabetes Res Clin Pract and referenced in Journal of AIDS & Clinical Research

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