Volume 39, Issue 6 pp. 837-844
Main Article

Danon disease: Further clinical and molecular heterogeneity

Frédérique Sabourdy DVM, PhD

Frédérique Sabourdy DVM, PhD

Laboratoire de Biochimie “Maladies Métaboliques,” Institut Fédératif de Biologie, CHU Purpan, Toulouse, France

INSERM U858, Institut de Médecine de Moléculaire de Rangueil, BP 84255, Cedex 4, 31432 Toulouse, France

Université Paul Sabatier, Institut de Médecine Moléculaire de Rangueil, IFR31, Toulouse, France

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Helen Michelakakis PhD

Helen Michelakakis PhD

Institute of Child Health, Aghia Sophia Children's Hospital, Athens, Greece

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Aris Anastasakis MD, PhD

Aris Anastasakis MD, PhD

Division of Inherited Cardiovascular Disease, First Department of Cardiology, University of Athens, Athens, Greece

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Virginie Garcia

Virginie Garcia

INSERM U858, Institut de Médecine de Moléculaire de Rangueil, BP 84255, Cedex 4, 31432 Toulouse, France

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Irene Mavridou PhD

Irene Mavridou PhD

Laboratoire de Biochimie “Maladies Métaboliques,” Institut Fédératif de Biologie, CHU Purpan, Toulouse, France

Institute of Child Health, Aghia Sophia Children's Hospital, Athens, Greece

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Michèle Nieto

Michèle Nieto

Laboratoire de Biochimie “Maladies Métaboliques,” Institut Fédératif de Biologie, CHU Purpan, Toulouse, France

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Marie-Claude Pons

Marie-Claude Pons

Laboratoire de Biochimie “Maladies Métaboliques,” Institut Fédératif de Biologie, CHU Purpan, Toulouse, France

INSERM U858, Institut de Médecine de Moléculaire de Rangueil, BP 84255, Cedex 4, 31432 Toulouse, France

Université Paul Sabatier, Institut de Médecine Moléculaire de Rangueil, IFR31, Toulouse, France

Institute of Child Health, Aghia Sophia Children's Hospital, Athens, Greece

Division of Inherited Cardiovascular Disease, First Department of Cardiology, University of Athens, Athens, Greece

Neurology Department, Aghia Sophia Children's Hospital, Athens, Greece

Neuromuscular Unit, Department of Neurology, University of Athens, Athens, Greece

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Constantinos Skiadas MD, PhD

Constantinos Skiadas MD, PhD

Neurology Department, Aghia Sophia Children's Hospital, Athens, Greece

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Marina Moraitou PhD

Marina Moraitou PhD

Institute of Child Health, Aghia Sophia Children's Hospital, Athens, Greece

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Panagiota Manta MD, PhD

Panagiota Manta MD, PhD

Neuromuscular Unit, Department of Neurology, University of Athens, Athens, Greece

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Milan Elleder MD, PhD

Milan Elleder MD, PhD

Institute of Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General Teaching Hospital, Prague, Czech Republic

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Thierry Levade MD, PhD

Corresponding Author

Thierry Levade MD, PhD

Laboratoire de Biochimie “Maladies Métaboliques,” Institut Fédératif de Biologie, CHU Purpan, Toulouse, France

INSERM U858, Institut de Médecine de Moléculaire de Rangueil, BP 84255, Cedex 4, 31432 Toulouse, France

Université Paul Sabatier, Institut de Médecine Moléculaire de Rangueil, IFR31, Toulouse, France

INSERM U858, Institut de Médecine de Moléculaire de Rangueil, BP 84255, Cedex 4, 31432 Toulouse, FranceSearch for more papers by this author
First published: 16 April 2009
Citations: 16

Abstract

Two families of Greek patients with subclinical to severe cardiomyopathy are presented. The diagnosis of Danon disease was supported by a total lack of LAMP2 immunostaining in cultured skin fibroblasts and muscle biopsies. The LAMP2 mutation carried by one patient (c.928G>A) has already been reported but with different symptoms. The second patient had a novel point deletion. This has not been described previously, but it could be detected easily by restriction analysis. This mutation was also found in the patient's brother, and it was associated with severe cardiomyopathy leading to heart failure. Surprisingly, the proband also had partial reduction of α-galactosidase A activity, despite the absence of characteristic clinical features of Fabry disease. A substitution in the GLA gene (c.937G>T) was found, and its involvement in the cardiac disease is discussed. Muscle Nerve, 2009

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