Expanding the Genotypic and Phenotypic Spectrum of -Related Conditions: Three More Cases.

Introduction: Pathogenic variants in the gene are linked to a spectrum of syndromes that exhibit partial clinical overlap. Hemizygous loss-of-function variants are considered lethal in males, while heterozygous loss-of-function variants generally result in oro-facial-digital syndrome type 1. A reported phenotype, Simpson-Golabi-Behmel syndrome type 2, was published once but remains controversial, with many specialists questioning its validity and arguing about its continued listing in the OMIM database.

The frequent variant A57F in the gene in patients from Russia has Finno-Ugric Mari origin.

Introduction: GNE-myopathy is a distal myopathy with adult-onset and initial involvement of anterior leg compartment. A founder effect has been demonstrated for some patients from several large cohorts in different countries.

Methods: In this study, we investigated the allele frequency of the c.

Asymmetric scapuloperoneal phenotype of -related distal myopathy: case series.

Recent research has sparked a discussion on the spectrum of diseases linked to the gene associated with amyotrophic lateral sclerosis and distal myopathy with vocal cord and pharyngeal weakness (VCPDM). To date, fewer than 50 cases of VCPDM have been reported in the literature. We aim to build upon the work of previous researchers by gathering additional information about VCPDM.

Mild phenotype of -associated congenital myasthenic syndrome: case series.

Congenital myasthenic syndrome with episodic apnea is associated with pathogenic variants in the gene. While respiratory disorders and oculomotor findings are commonly reported in affected individuals, a subset of patients only present with muscle weakness and/or ptosis but not apneic crises. In this case series, we describe five individuals with exercise intolerance caused by single nucleotide variants in the gene.

Expanding the Phenotype of Hereditary Congenital Facial Paresis Type 3.

The gene encodes a homeobox transcription factor pivotal in the development of rhombomere 4. Biallelic pathogenic variants in this gene are associated with congenital facial paresis type 3 (HCFP3). Only seven single nucleotide variants have been reported in the literature to date.

Specificities of the DMD Gene Mutation Spectrum in Russian Patients.

Duchenne/Becker muscular dystrophy (DMD/BMD) is the most common form of muscular dystrophy, accounting for over 50% of all cases. In this regard, in Russia we carry out a program of selective screening for DMD/BMD, which mainly involves male patients. The main inclusion criteria are an increase in the level of creatine phosphokinase (>2000 U/L) or an established clinical diagnosis.

Genetic and Clinical Spectrum of GNE Myopathy in Russia.

GNE myopathy (GNEM) is a rare hereditary disease, but at the same time, it is the most common distal myopathy in several countries due to a founder effect of some pathogenic variants in the gene. We collected the largest cohort of patients with GNEM from Russia and analyzed their mutational spectrum and clinical data. In our cohort, 10 novel variants were found, including 2 frameshift variants and 2 large deletions.

Palmoplantar Keratoderma: A Molecular Genetic Analysis of Family Cases.

Palmoplantar keratoderma is a clinically polymorphic disorder with a heterogeneous etiology characterized by marked hyperkeratotic lesions on the surface of palms and soles. Hereditary forms of palmoplantar keratoderma usually have autosomal dominant inheritance and are caused by mutations in dozens of genes, most of which belong to the keratin family. We carried out clinical and molecular genetic analysis of the affected and healthy members of four families with autosomal dominant palmoplantar keratoderma.

A novel splice site mutation in gene of a female with ornithine transcarbamylase deficiency and her asymptomatic mosaic father.

Ornithine transcarbamylase deficiency is an X-linked disease with a wide range of clinical severity and manifestation age both in males and females. Here, we describe a case which is caused by a novel c.78-1G[A splice site mutation, which on mRNA level leads to a 1-bp deletion and a frameshift (c.