Journal of Molecular Medicine

, Volume 89, Issue 2, pp 161–170

Successful TAT-mediated enzyme replacement therapy in a mouse model of mitochondrial E3 deficiency

  • Matan Rapoport
  • Lina Salman
  • Ofra Sabag
  • Mulchand S. Patel
  • Haya Lorberboum-Galski
Original Article

DOI: 10.1007/s00109-010-0693-3

Cite this article as:
Rapoport, M., Salman, L., Sabag, O. et al. J Mol Med (2011) 89: 161. doi:10.1007/s00109-010-0693-3

Abstract

Medicine today offers no cure for patients suffering from mitochondrial disorders, such as lipoamide dehydrogenase (LAD; also known as E3) deficiency, and treatment is limited to symptomatic care. LAD is one of the components of the α-ketoacid dehydrogenase complexes, which are mitochondrial multienzyme complexes crucial for the metabolism of carbohydrates and amino acids. Recently, we tested the therapeutic approach for treating mitochondrial disorders whereby the activity of multicomponent complexes in the mitochondria is restored by TAT-mediated enzyme replacement therapy (ERT). The LAD deficiency disease was used before as a proof-of-principle in vitro, in patients' cells, utilizing the TAT-LAD fusion protein. In this report, we present successful TAT-mediated ERT in an in vivo mouse model using E3-deficient mice. We demonstrate the delivery of TAT-LAD into E3-deficient mice tissues and that a single administration of TAT-LAD results in a significant increase in the enzymatic activity of the mitochondrial multienzyme complex pyruvate dehydrogenase complex within the liver, heart and, most importantly, the brain of TAT-LAD-treated E3-deficient mice. We believe that this TAT-mediated ERT approach could change the management of mitochondrial disorders and of other metabolic diseases in modern medicine.

Keywords

Mitochondrial disorders Lipoamide dehydrogenase (LAD) deficiency Enzyme replacement therapy TAT E3 mice 

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Matan Rapoport
    • 1
  • Lina Salman
    • 1
  • Ofra Sabag
    • 1
  • Mulchand S. Patel
    • 2
  • Haya Lorberboum-Galski
    • 1
  1. 1.Department of Biochemistry and Molecular Biology, Institute for Medical Research—Israel–CanadaThe Hebrew University-Hadassah Medical SchoolJerusalemIsrael
  2. 2.Department of Biochemistry, School of Medicine and Biomedical SciencesState University of New York at BuffaloBuffaloUSA

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