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Immunomodulatory gene therapy in lysosomal storage disorders.

Abstract
Significant advances in therapy for lysosomal storage disorders have occurred with an accelerating pace over the past decade. Although enzyme replacement therapy has improved the outcome of lysosomal storage disorders, antibody responses have occurred and sometimes prevented efficacy, especially in cross-reacting immune material negative patients with Pompe disease. Preclinical gene therapy experiments have revealed the relevance of immune responses to long-term efficacy. The choice of regulatory cassette played a critical role in evading humoral and cellular immune responses to gene therapy in knockout mouse models, at least in adult animals. Liver-specific regulatory cassettes prevented antibody formation and enhanced the efficacy of gene therapy. Regulatory T cells prevented transgene directed immune responses, as shown by adoptive transfer of antigen-specific immune tolerance to enzyme therapy. Immunomodulatory gene therapy with a very low vector dose could enhance the efficacy of enzyme therapy in Pompe disease and other lysosomal storage disorders.
AuthorsDwight D Koeberl, Priya S Kishnani
JournalCurrent gene therapy (Curr Gene Ther) Vol. 9 Issue 6 Pg. 503-10 (Dec 2009) ISSN: 1875-5631 [Electronic] United Arab Emirates
PMID19807648 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't, Review)
Chemical References
  • Antigens, CD
Topics
  • Antigens, CD (immunology)
  • Genetic Therapy
  • Humans
  • Lysosomal Storage Diseases (genetics, immunology, therapy)
  • T-Lymphocytes, Regulatory (immunology)
  • Transgenes

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