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Related Experiment Videos

Protection from experimental endotoxemia by a recombinant adeno-associated virus encoding interleukin 10.

S Yamano1, D E Scott, L Y Huang

  • 1Gene Therapy and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA. syamano@dir.nidcr.nih.gov

The Journal of Gene Medicine
|October 17, 2001
PubMed
Summary

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Gene therapy·2016

Adeno-associated virus (AAV) vectors delivering interleukin 10 (IL-10) protected mice from endotoxic shock. This gene therapy approach shows promise for treating autoimmune diseases by providing sustained IL-10 expression.

Area of Science:

  • Gene Therapy
  • Immunology
  • Molecular Biology

Background:

  • Interleukin 10 (IL-10) is a cytokine with significant clinical potential.
  • Adeno-associated virus (AAV) vectors are increasingly utilized for in vivo gene transfer.

Purpose of the Study:

  • To assess the efficacy of a recombinant AAV vector encoding human IL-10 (rAAVhIL10) for sustained IL-10 expression and therapeutic benefit.
  • To evaluate the protective effects of rAAVhIL10 against lipopolysaccharide (LPS)-induced endotoxic shock in a murine model.

Main Methods:

  • Constructed a recombinant AAV type 2 vector (rAAVhIL10) using a three-plasmid co-transfection system.
  • Validated in vitro biological activity of vector-derived IL-10 by measuring its effect on IL-12 secretion in knockout mouse spleen cells.
  • Administered rAAVhIL10 intravenously or intramuscularly to IL-10 knockout mice and challenged them with LPS to induce endotoxic shock.

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Main Results:

  • Vector-derived hIL-10 demonstrated dose-dependent biological activity in vitro.
  • In vivo administration of rAAVhIL10 resulted in detectable serum hIL-10 levels up to 8 weeks post-administration.
  • Mice treated with rAAVhIL10 showed significantly reduced mortality and morbidity following LPS-induced endotoxic shock compared to controls.

Conclusions:

  • A modest dose of rAAVhIL10 administered in vivo provides long-term protection against LPS-induced endotoxic shock in a murine model.
  • This AAV-based gene therapy approach holds potential for clinical applications requiring sustained IL-10 expression, such as in treating autoimmune diseases.