ABSTRACT
INTRODUCTION: Emery-Dreifuss muscular dystrophy (EDMD) is a hereditary myopathy characterized as triad of muscular dystrophy, joint contractures, and conduction cardiomyopathy. In this study, we diagnosed a X-linked recessive EDMD patient with severe conduction cardiomyopathy while noteless muscular and joint disorders. METHODS: A Chinese cardiomyopathy family spanning four generations was enrolled in the study. Targeted next-generation sequencing (NGS) was performed to identify the underlying mutation in the proband and validated by Sanger sequencing. Segregation analysis was applied to all 13 participants. RESULTS: A novel frameshift mutation (c.253_254insT, p.Y85Lfs*8) of emerin gene (EMD) was found and co-segregated with family members. Other than the typical manifestations of X-linked EDMD, this patient presented inconspicuous muscular disorders which were later diagnosed after the mutation been identified. CONCLUSIONS: This study enriches the EMD gene mutation database and reminds us of the possibility of EDMD while encountering patients with severe heart rhythm defects or dilated cardiomyopathy of unknown etiology, even if they have neither obvious skeletal muscle disorder nor joint involvement.
Subject(s)
Cardiac Conduction System Disease , Cardiomyopathies/genetics , Membrane Proteins/genetics , Muscular Dystrophy, Emery-Dreifuss , Nuclear Proteins/genetics , Asian People , Cardiac Conduction System Disease/diagnosis , Cardiac Conduction System Disease/etiology , Cardiomyopathies/complications , Cardiomyopathies/diagnosis , Cardiomyopathies/physiopathology , Echocardiography/methods , Family , Female , Humans , Male , Middle Aged , Muscle, Skeletal/pathology , Muscular Dystrophy, Emery-Dreifuss/diagnosis , Muscular Dystrophy, Emery-Dreifuss/genetics , MutationABSTRACT
Blood collection with enough blood volume is essential in animal experiments. Blood collection from the tail vein of rats is popular and less stressful compared to other more aggressive methods such as retro-orbital plexus sample collection. However, this blood collection method is sometimes limited by an unsatisfactory success rate. Here, we introduce a method for blood collection through the subclavian vein puncture. The subclavian vein is located just under the clavicle and this vein is large enough to fulfill the volume requirements of blood collection. Our results show that this method is safe and applicable for blood collection sampling with the required blood volume. Blood collection through the subclavian vein puncture could serve as an alternative blood collection method in case of failed tail vein blood sampling in rats.
Subject(s)
Blood Specimen Collection/methods , Punctures/methods , Subclavian Vein/anatomy & histology , Subclavian Vein/physiology , Animals , Male , Phlebotomy/methods , Rats , Rats, Sprague-DawleyABSTRACT
Zhao C, Li Y, Shi G, Shi X, Zhang G. A novel Y160C mutation of Keratin 10 gene in a Chinese male infant with epidermolytic hyperkeratosis. Turk J Pediatr 2018; 60: 426-428. Epidermolytic hyperkeratosis (EHK) is a rare genodermatosis whose prevalence is less than 1 in 100,000. Mutations in either the keratin 1 or keratin 10 genes lead to EHK characterized by congenital erythema and epidermal blisters at birth, followed by hyperkeratotic skin lesions with age. We here report a 1-and-a-half-year-old male infant with EHK caused by a novel mutation, c.479A > G, g.489A > G, p. Y160C, of the keratin 10 gene. Mutation at this position has been reported previously, but the type of amino acid change was different. These results expand the database of keratin 10 gene mutations.
