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NIH Research Festival

September 16 – 18, 2015

CSF-directed AAV9 gene therapy plus subcutaneous copper provides superior rescue in a mouse model of Menkes disease

Friday, September 18, 2015 – Poster Session V
2:00 – 3:30 p.m.

FAES Terrace

NICHD

NEURO-14

FARE Award Winner

Authors

  • MR Haddad
  • D Martinelli
  • EY Choi
  • PM Zerfas
  • P Sullivan
  • DS Goldstein
  • D Abebe
  • JA Centeno
  • SG Kaler

Abstract

Menkes disease is a lethal infantile neurodegenerative disorder of copper metabolism caused by mutations in a P-type ATPase ATP7A. Untreated patients die by 3 years. Currently, the only available treatment is daily subcutaneous copper-histidine injections, which is not effective in the majority of patients who would benefit from gene therapy. The mottled-brindled mouse recapitulates the Menkes phenotype and the mutants die by 14 days of age. We used Adeno-Associated Virus (AAV) vectors carrying ATP7A cDNA. We previously demonstrated that AAV serotype 5 (AAV5) in combination with copper both given into the brain’s lateral ventricles (ICV) was able to significantly prolong the survival of the mutants. However, subtle abnormalities in growth and neuromotor functions persisted. In this study, we report far superior outcomes using AAV9 given ICV in combination with subcutaneous copper-histidine. We employed AAV9 and AAVrh10 given their broad tropism compared to AAV5. We used 3 different doses: high (1.6x1010vg), intermediate (5.0x109vg) and low (1.6x109vg) plus copper; our intermediate and high AAV9-ATP7A doses were most effective. Cerebrospinal fluid-directed AAV9 with subcutaneous Cu resulted in superior murine survival, neurobehavioral outcomes and growth compared to AAVrh10 and to our previous results with AAV5. In addition, this synergistic effect (high AAV9+Cu) showed improved brain neurochemicals compared to untreated and correlated with viral genome copies. Copper measurements in combination-treated mutants were not statistically different from wild type suggesting a restored copper transport to the brain. Our findings provide definitive evidence that gene therapy has clinical utility in the treatment of Menkes disease.

Scientific Focus Area: Neuroscience

This page was last updated on Friday, March 26, 2021

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Current Research Festival

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  • 2024
    • General Schedule of Events
    • 2024 NIH Distinguished Scholars Program
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    • Special Wednesday Events
    • Vendor Exhibit Information
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  • 2023
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    • NIH Early–Career Investigator Lectures
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    • General Schedule of Events
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    • Technical Sales Association (TSA) Research Festival Exhibit Tent Show
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    • Plenary Sessions
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    • Future Research Leaders
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    • Browse by Presenter IC
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  • 2015
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