Gene Therapy Slows Huntington’s Disease Progress by 75%

In a landmark clinical trial, researchers in the UK report the first successful use of gene therapy to treat Huntington’s disease, showing a 75 % slowdown in disease progression over three years.

The therapy works by delivering a modified, harmless virus into the brain to block production of the mutant huntingtin protein that kills neurons. The single-shot infusion, done over 12–20 hours via micro-catheter into two brain regions, was tested in 29 patients in the UK and US. 

The trial was led by Prof Sarah Tabrizi at UCL and marks a turning point for a disease long considered incurable. Early results show reductions in neurodegeneration markers (neurofilament levels) and improvements in motor, cognitive, and daily-life assessments among high-dose recipients. 

While the procedure is complex and costly, the outcome raises hope for wider treatment access and even preventative use in early-stage or presymptomatic carriers. Though full data have yet to be published, the company uniQure aims to file for regulatory approval next year. 

This breakthrough could shift the Huntington’s community’s approach to genetic testing—more people might opt in now that a therapy exists. That said, challenges remain: costs, surgical risks, long-term safety, and broader equity in access must be addressed before this becomes standard care.

Key Takeaways

Gene therapy in this trial reduced Huntington’s disease progression by ~75 % across motor, cognitive, and functional measures over 3 years.

The treatment uses a viral vector to deliver DNA into neurons, shutting down the toxic mutant huntingtin protein.

Barriers remain: cost, surgical complexity, long-term safety, and regulatory approval.

Adapted From:

https://www.theguardian.com/science/2025/sep/24/huntingtons-disease-treated-successfully-for-first-time-in-gene-therapy-trial

Brief Explanation of HD.

Huntington's disease (HD), also known as Huntington's chorea, is a neurodegenerative disease that is mostly inherited. It typically presents as a triad of progressive psychiatric, cognitive, and motor symptoms. The earliest symptoms are often subtle problems with mood or mental/psychiatric abilities, which precede the motor symptoms for many people.The definitive physical symptoms, including a general lack of coordination and an unsteady gait, eventually follow.

Source:

https://en.m.wikipedia.org/wiki/Huntington's_disease