Laminopathies in Russian families |
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| Authors: | Rudenskaya G E Polyakov A V Tverskaya S M Zaklyazminskaya E V Chukhrova A L Groznova O E Ginter E K |
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| Institution: | Genetic Counseling Department, Medical Genetics Research Centre, Russian Academy of Medical Sciences, Moscow;, DNA Diagnostic Department;and Cardiology Department, Moscow Institute of Pediatrics and Child Surgery, Moscow, Russia |
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| Abstract: | Mutations in LMNA gene produce a wide spectrum of disorders called laminopathies. In this article, the first cases of laminopathies from Russia are reported. In 10 unrelated families, 9 different mutations were identified: Asp47His, Gly232Arg, c.781_783delAAG, 781insGTGGAGCAGTATAAGAAA], Arg249Gln (in two families), Arg377His, Arg541His, Ala350Pro, Leu52Pro, and Gly635Asp. Mutations Arg249Gln, Arg377His, and Arg541His were reported previously, others are novel. Four cases present de novo mutations, among them two cases with Arg249Gln are found. Because this mutation occurred de novo also in other reported cases, a mutational 'hot spot' was supposed. Three phenotypes were observed: autosomal dominant (AD) Emery–Dreifuss muscular dystrophy (EDMD), limb-girdle MD type 1B, and AD dilated cardiomyopathy with conduction defect type 1A (DCM1A). Atypical clinical presentations were a very severe EDMD and an infantile DCM1A. |
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| Keywords: | dilated cardiomyopathy with conduction defect Emery–Dreifuss muscular dystrophy laminopathies limb-girdle muscular dystrophy 1B LMNA mutations |
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