Volume 55, Issue 5 pp. 676-686
Original Articles

Desmin-related myopathy with mallory body–like inclusions is caused by mutations of the selenoprotein N gene

Ana Ferreiro MD, PhD

Corresponding Author

Ana Ferreiro MD, PhD

Institut National de la Santé et de la Recherche Médicale U582, Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France

INSERM U582, Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, 47 Bd. de l'Hôpital, 75651 Paris, FranceSearch for more papers by this author
Chantal Ceuterick-de Groote PhD

Chantal Ceuterick-de Groote PhD

Department of Neuropathology, Born-Bunge Foundation and University of Antwerp, Antwerpen, Belgium

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Jared J. Marks BA

Jared J. Marks BA

Children's Hospital of Philadelphia, Philadelphia, PA

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Nathalie Goemans MD

Nathalie Goemans MD

Department of Paediatrics, University Hospital Gasthuisberg, Leuven, Belgium

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Gudrun Schreiber MD

Gudrun Schreiber MD

Abteilung Neuropädiatrie, Kinderklinik and Poliklinik, Georg-August Universität Göttingen, Göttingen, Germany

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Folker Hanefeld MD

Folker Hanefeld MD

Abteilung Neuropädiatrie, Kinderklinik and Poliklinik, Georg-August Universität Göttingen, Göttingen, Germany

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Michel Fardeau MD

Michel Fardeau MD

Institut National de la Santé et de la Recherche Médicale U582, Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France

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Jean-Jacques Martin MD, PhD

Jean-Jacques Martin MD, PhD

Department of Neuropathology, Born-Bunge Foundation and University of Antwerp, Antwerpen, Belgium

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Hans H. Goebel MD

Hans H. Goebel MD

Department of Neuropathology, Johannes Gutenberg University, Mainz, Germany

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Pascale Richard PhD

Pascale Richard PhD

Service de Biochimie B, Groupe Hospitalier Pitié-Salpêtrière, Paris, France

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Pascale Guicheney PhD

Pascale Guicheney PhD

Institut National de la Santé et de la Recherche Médicale U582, Institut de Myologie, Groupe Hospitalier Pitié-Salpêtrière, Paris, France

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Carsten G. Bönnemann MD

Carsten G. Bönnemann MD

Children's Hospital of Philadelphia, Philadelphia, PA

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First published: 25 March 2004
Citations: 168

Accession numbers are listed in the Appendix on the last page of this article.

Abstract

Desmin-related myopathies (DRMs) are a heterogeneous group of muscle disorders, morphologically defined by intrasarcoplasmic aggregates of desmin. Mutations in the desmin and the α-B crystallin genes account for approximately one third of the DRM cases. The genetic basis of the other forms remain unknown, including the early-onset, recessive form with Mallory body–like inclusions (MB-DRMs), first described in five related German patients. Recently, we identified the selenoprotein N gene (SEPN1) as responsible for SEPN-related myopathy (SEPN-RM), a unique early-onset myopathy formerly divided in two different nosological categories: rigid spine muscular dystrophy and the severe form of classical multiminicore disease. The finding of Mallory body–like inclusions in two cases of genetically documented SEPN-RM led us to suspect a relationship between MB-DRM and SEPN1. In the original MB-DRM German family, we demonstrated a linkage of the disease to the SEPN1 locus (1p36), and subsequently a homozygous SEPN1 deletion (del 92 nucleotide −19/+73) in the affected patients. A comparative reevaluation showed that MB-DRM and SEPN-RM share identical clinical features. Therefore, we propose that MB-DRM should be categorized as SEPN-RM. These findings substantiate the molecular heterogeneity of DRM, expand the morphological spectrum of SEPN-RM, and implicate a necessary reassessment of the nosological boundaries in early-onset myopathies. Ann Neurol 2004

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