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Articles, Neurobiology of Disease

Intrabody Gene Therapy Ameliorates Motor, Cognitive, and Neuropathological Symptoms in Multiple Mouse Models of Huntington's Disease

Amber L. Southwell, Jan Ko and Paul H. Patterson
Journal of Neuroscience 28 October 2009, 29 (43) 13589-13602; https://doi.org/10.1523/JNEUROSCI.4286-09.2009
Amber L. Southwell
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Jan Ko
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Paul H. Patterson
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Abstract

Huntington's disease (HD) is an autosomal dominant neurodegenerative disease resulting from the expansion of a glutamine repeat in the huntingtin (Htt) protein. Current therapies are directed at managing symptoms such as chorea and psychiatric disturbances. In an effort to develop a therapy directed at disease prevention we investigated the utility of highly specific, anti-Htt intracellular antibodies (intrabodies). We previously showed that VL12.3, an intrabody recognizing the N terminus of Htt, and Happ1, an intrabody recognizing the proline-rich domain of Htt, both reduce mHtt-induced toxicity and aggregation in cell culture and brain slice models of HD. Due to the different mechanisms of action of these two intrabodies, we then tested both in the brains of five mouse models of HD using a chimeric adeno-associated virus 2/1 (AAV2/1) vector with a modified CMV enhancer/chicken β-actin promoter. VL12.3 treatment, while beneficial in a lentiviral model of HD, has no effect on the YAC128 HD model and actually increases severity of phenotype and mortality in the R6/2 HD model. In contrast, Happ1 treatment confers significant beneficial effects in a variety of assays of motor and cognitive deficits. Happ1 also strongly ameliorates the neuropathology found in the lentiviral, R6/2, N171-82Q, YAC128, and BACHD models of HD. Moreover, Happ1 significantly prolongs the life span of N171-82Q mice. These results indicate that increasing the turnover of mHtt using AAV-Happ1 gene therapy represents a highly specific and effective treatment in diverse mouse models of HD.

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The Journal of Neuroscience: 29 (43)
Journal of Neuroscience
Vol. 29, Issue 43
28 Oct 2009
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Intrabody Gene Therapy Ameliorates Motor, Cognitive, and Neuropathological Symptoms in Multiple Mouse Models of Huntington's Disease
Amber L. Southwell, Jan Ko, Paul H. Patterson
Journal of Neuroscience 28 October 2009, 29 (43) 13589-13602; DOI: 10.1523/JNEUROSCI.4286-09.2009

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Intrabody Gene Therapy Ameliorates Motor, Cognitive, and Neuropathological Symptoms in Multiple Mouse Models of Huntington's Disease
Amber L. Southwell, Jan Ko, Paul H. Patterson
Journal of Neuroscience 28 October 2009, 29 (43) 13589-13602; DOI: 10.1523/JNEUROSCI.4286-09.2009
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