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A rare splice site mutation in the gene encoding glucokinase/hexokinase 4 in a patient with MODY type 2
- Source :
- Vavilovskij Žurnal Genetiki i Selekcii, Vol 24, Iss 3, Pp 299-305 (2020)
- Publication Year :
- 2020
- Publisher :
- Institute of Cytology and Genetics, SB RAS, 2020.
-
Abstract
- The article presents a variant of maturity onset diabetes of the young type 2, caused by a rare mutation in the GCK gene. Maturity onset diabetes of the young (MODY) is a hereditary form of diabetes with an autosomal dominant type of inheritance, an onset at a young age, and a primary defect in pancreatic β-cell function. This type of diabetes is different from classical types of diabetes mellitus (DM1 and DM2) in its clinical course, treatment strategies, and prognosis. Clinical manifestations of MODY are heterogeneous and may vary even among members of the same family, i. e., carriers of identical mutations. This phenotypic variation is due to the interaction of mutations with different genetic backgrounds and the influence of environmental factors (e. g., lifestyle). Using next-generation sequencing technology, the c.580-1G>A substitution (IVS5 -1G>A, rs1554335421) located in an acceptor splice site of intron 5 of the GCK gene was found in a proband. The identified variant cosegregated with a pathological phenotype in the examined family members. The GCK gene encodes glucokinase (hexokinase 4), which catalyzes the first step in a large number of glucose metabolic pathways such as glycolysis. Mutations in this gene are the cause of MODY2. The illness is characterized by an insignificant increase in the fasting glucose level, is a well-controlled disease without medication, and has a low prevalence of micro- and macrovascular complications of diabetes. The presented case of MODY2 reveals the clinical significance of a mutation in the splice site of the GCK gene. When nonclassical diabetes mellitus is being diagnosed in young people and pregnant women, genetic testing is needed to verify the diagnosis and to select the optimal treatment method. Key words: human; maturity onset diabetes of the young; MODY2; glucokinase gene; next-generation sequencing; genetic analysis; bioinformatics.
- Subjects :
- Proband
010407 polymers
genetic analysis
QH426-470
Biology
medicine.disease_cause
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Maturity onset diabetes of the young
mody2
glucokinase gene
maturity onset diabetes of the young
03 medical and health sciences
0302 clinical medicine
Diabetes mellitus
Genetics
medicine
human
Gene
Genetic testing
Mutation
Splice site mutation
medicine.diagnostic_test
Glucokinase
bioinformatics
medicine.disease
0104 chemical sciences
030220 oncology & carcinogenesis
next-generation sequencing
General Agricultural and Biological Sciences
Subjects
Details
- ISSN :
- 25003259 and 25000462
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- Vavilov Journal of Genetics and Breeding
- Accession number :
- edsair.doi.dedup.....054feca795c98363aff670d6a50c6517