There have been extraordinary advances in our knowledge of the underlying gene, the protein it encodes, various models of disease, and potential targets for effective therapies for Huntington disease. Huntington disease research has increased exponentially in the past 25 years, and we now understand many of the molecular mechanisms underlying the disease. Still, more work needs to be done before we have a full understanding of the pathophysiology of the disease. Clinical research on biomarkers and clinical trials on potential neuroprotective agents are underway. Here we review our progress in these areas over the last 25 years and speculate on what the next 25 years may hold.
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