Neuronal ceroid lipofuscinosis in the Russian population: Two novel mutations and the prevalence of heterozygous carriers.
Mol Genet Genomic Med
; 8(7): e1228, 2020 07.
Article
em En
| MEDLINE
| ID: mdl-32412666
ABSTRACT
BACKGROUND:
Neuronal ceroid lipofuscinoses (NCLs) are a group of neurodegenerative disorders characterized by an accumulation of lipofuscin in the body's tissues. NCLs are associated with variable age of onset and progressive symptoms including seizures, psychomotor decline, and loss of vision.METHODS:
We describe the clinical and molecular characteristics of four Russian patients with NCL (one female and three males, with ages ranging from 4 to 5 years). The clinical features of these patients include cognitive and motor deterioration, seizures, stereotypies, and magnetic resonance imaging signs of brain atrophy. Exome sequencing was performed to identify the genetic variants of patients with NCL. Additionally, we tested 6,396 healthy Russians for NCL alleles.RESULTS:
We identified five distinct mutations in four NCL-associated genes of which two mutations are novel. These include a novel homozygous frameshift mutation in the CLN6 gene, a compound heterozygous missense mutation in the KCTD7 gene, and previously known mutations in KCTD7, TPP1, and MFSD8 genes. Furthermore, we estimated the Russian population carrier frequency of pathogenic and likely pathogenic variants in 13 genes associated with different types of NCL.CONCLUSION:
Our study expands the spectrum of mutations in lipofuscinosis. This is the first study to describe the molecular basis of NCLs in Russia and has profound and numerous clinical implications for diagnosis, genetic counseling, genotype-phenotype correlations, and prognosis.Palavras-chave
Texto completo:
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Bases de dados:
MEDLINE
Assunto principal:
População
/
Mutação
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Lipofuscinoses Ceroides Neuronais
Limite:
Child
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Child, preschool
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Female
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Humans
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Male
País/Região como assunto:
Asia
/
Europa
Idioma:
En
Revista:
Mol Genet Genomic Med
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Federação Russa