Duchenne's/Becker's muscular dystrophy: Analysis of genotype-feno-type correlation in 28 patients

Author:

Keckarevic Milica1,Savic Dusanka1,Culjkovic Biljana1,Zamurovic Natasa1,Major Tamara1ORCID,Keckarevic Dusan1,Todorovic Slobodanka2,Romac Stanka1

Affiliation:

1. Biološki fakultet Univerziteta, Beograd

2. Klinika za neurologiju i psihijatriju za decu i omladinu Medicinskog fakulteta Univerziteta, Beograd

Abstract

Duchenne's and Becker's muscular dystrophy (DMD & BMD) is a X linked disease caused by mutations in the dystrophic gene. DMD is the malign form of the disease, which significantly shortens the lifetime of the patient, while BMD has late onset with slow progression. Sixty five percent of DMD and BMD cases are caused by deletion of one or more exons in the dystrophic gene, while duplications cause these diseases in 6 to 7% of the cases. There are two hot spots for deletions and duplications. These are exons in the proximal part of the gene (3rd to 18th) and exons of a distal part of the gene (45th to 52nd). The remaining 30% of DMD and BMD cases are caused by point mutations, small deletions or inversions in the dystrophic gene. The correlation between School of Medicine, University of Belgrade, Belgrade the severity of the disease and the position of deletion shows that most of the out of frame deletions cause DMD phenotype, while in frame deletions result in BMD pheno-type. We report on the results of 28 non-related DMD and BMD patients. In 57% of cases deletions were detected and all were found in the distal hot spot of the gene. These results suggest that in most of the cases, out of frame deletions produce DMD phenotype while in frame deletions result in BMD phenotype. This is in compliance with data from literature.

Publisher

National Library of Serbia

Subject

General Medicine

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