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Updated: Jun 16, 2026
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Efficient and Scalable Production of Full-length Human Huntingtin Variants in Mammalian Cells using a Transient Expression System
Published on: December 10, 2021
An ovine transgenic Huntington's disease model.
Jessie C Jacobsen1, C Simon Bawden, Skye R Rudiger
1Department of Molecular Medicine and Pathology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand.
Human Molecular Genetics
|February 16, 2010
Summary
Researchers developed a transgenic sheep model for Huntington
Area of Science:
- Neuroscience
- Genetics
- Animal Models
Background:
- Huntington's disease (HD) is an inherited neurodegenerative disorder caused by CAG repeat expansion in the huntingtin (HTT) gene.
- Current treatments for HD are limited, highlighting the need for effective therapeutic strategies.
- Developing advanced animal models is crucial for fast-tracking HD treatments into clinical trials.
Purpose of the Study:
- To create a large-animal transgenic model for Huntington's disease (HD) to accelerate treatment development.
- To establish a sheep model that mimics key aspects of human HD pathology for preclinical research.
Main Methods:
- Developed transgenic sheep by microinjecting a full-length human HTT cDNA with 73 polyglutamine repeats.
- Analyzed transgene expression in CNS and non-CNS tissues of offspring.
- Performed immunohistochemical analysis of brain regions, including the caudate nucleus and putamen.
Main Results:
- Generated six transgenic sheep founders with varying transgene copy numbers.
- Confirmed robust expression of the human HTT protein in both central nervous system (CNS) and non-CNS tissues.
- Observed decreased expression of the medium spiny neuron marker DARPP-32 in offspring at 7 months of age.
Conclusions:
- The developed transgenic ovine model effectively expresses the human HTT protein, mirroring aspects of HD.
- This large-animal model provides a practical platform for testing drug efficacy and surgical interventions for HD.
- The model is expected to aid in developing strategies to delay or prevent the onset of Huntington's disease.
