Article Text

other Versions

PDF
Short report
Complete loss of expression of the ANT1 gene causing cardiomyopathy and myopathy
  1. Andoni Echaniz-Laguna1,2,
  2. Maïté Chassagne3,
  3. Jennifer Ceresuela3,
  4. Isabelle Rouvet4,
  5. Sylvie Padet3,
  6. Cécile Acquaviva3,
  7. Serge Nataf4,
  8. Stéphane Vinzio5,
  9. Dominique Bozon6,
  10. Bénédicte Mousson de Camaret3
  1. 1Département de Neurologie, Hôpitaux Universitaires, Strasbourg, France
  2. 2INSERM U692, Université de Strasbourg, Strasbourg, France
  3. 3Service des Maladies Héréditaires du Métabolisme, Centre de Biologie et de Pathologie Est, CHU Lyon, Bron, France
  4. 4Centre de Biotechnologie Cellulaire, Centre de Biologie et de Pathologie Est, CHU Lyon, Bron, France
  5. 5Département de Médecine Interne, Hôpitaux Universitaires, Strasbourg, France
  6. 6Unité de Cardiogénétique Moléculaire, Centre de Biologie et de Pathologie Est, CHU Lyon, Bron, France
  1. Correspondence to Dr Andoni Echaniz-Laguna, Département de Neurologie, Hôpitaux Universitaires, Hôpital de Hautepierre, 67098, Strasbourg cedex, France; andoni.echaniz-laguna{at}chru-strasbourg.fr

Abstract

Background The ANT1 gene, encoding ADP/ATP translocase 1, was investigated in an adult patient with an autosomal recessive mitochondrial disorder characterised by congenital cataracts, hypertrophic cardiomyopathy, myopathy and lactic acidosis.

Methods and results ANT1 sequencing showed that the patient was homozygous for a new nucleotide variation, c.111+1G→A, abolishing the invariant GT splice donor site of intron 1. The ANT1 transcript was undetectable in both muscle and skin fibroblasts. A markedly abnormal metabolic profile was found, and skeletal muscle showed a dramatic proliferation of abnormal mitochondria, increased mitochondrial mass, and multiple mitochondrial DNA deletions. No compensating increase in the transcript level of the ANT3 gene, which encodes the human ubiquitous isoform of the ADP/ATP translocase, was observed. The patient's heterozygous mother had normal clinical, biochemical and pathological features.

Conclusions Complete loss of expression of the ANT1 gene causes a clinical syndrome mainly characterised by cardiomyopathy and myopathy. This report expands the clinical spectrum of ANT1-related human diseases, and emphasises the crucial role of the mitochondrial ADP/ATP carriers in muscle function and pathophysiology of human myopathies.

  • Cardiomyopathy
  • myopathy
  • lactic acidosis
  • ANT1 gene
  • neurology
  • neuromuscular disease

Statistics from Altmetric.com

Footnotes

  • Competing interests None.

  • Patient consent Obtained.

  • Ethics approval Hôpitaux Universitaires, Strasbourg, France.

  • Provenance and peer review Not commissioned; externally peer reviewed.

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.