A research team from Ruhr University in Bochum, Germany, revealed a new mechanism that explains the cause of the accumulation of harmful proteins in patients Huntington’s disease It is a serious genetic disorder for which there is no cure yet. Scientists hope that this discovery will contribute to opening the door to the development of future treatments targeting the origin of the disease.
The results of the study were published in the journal Proceedings of the National Academy of Sciences on January 8, 2026.
What is Huntington’s disease?
Table of Contents
- What is Huntington’s disease?
- Why are denatured proteins dangerous?
- The role of “ubiquitin tag” in protein clearance
- Outstanding international scientific cooperation
- Disruption of marking sites increases disease severity
- An important step towards future treatments
- New hope despite the absence of treatment
Huntington’s disease is a rare but very serious genetic disease that results from a mutation in the huntingtin gene, which results in the production of a distorted version of the protein.
Professor Hoa Huu Phuc Nguyen, head of the University’s Department of Human Genetics, explained that the mutated protein contains elongated glutamine chains that cause it to fold abnormally, and thus fails to perform its basic functions inside cells.
Why are denatured proteins dangerous?
The body must get rid of damaged or misfolded proteins, but the mutated huntingtin protein is not broken down efficiently, but rather accumulates inside cells.
Over time, patients experience serious symptoms such as:
Movement disorders
Dementia
Psychological and behavioral problems
Nguyen stressed that the disease is ultimately fatal to all those infected.
The role of “ubiquitin tag” in protein clearance
Before any damaged protein is broken down, it is labeled with a molecular tag known as ubiquitin, which acts as a signal to transport it to the proteasome, the main system responsible for breaking down proteins within the cell.
The study showed that placing this mark in two specific sites of the huntingtin protein, K6 and K9, plays a crucial role in:
Proteolysis
Distribution within the cell
After labeling, the protein is transported to the proteasome for elimination.
Outstanding international scientific cooperation
The study was led by a team from the University of Bochum in cooperation with international partners, including Israeli scientist Professor Aaron Chekhanover, who won the Nobel Prize in Chemistry in 2004 in recognition of his research on the protein degradation system.
Disruption of marking sites increases disease severity
The researchers used a special mouse model in which the huntingtin gene was replaced with a human version that causes the disease. In another group, the K6 and K9 sites were modified to prevent ubiquitin labeling.
The results were clear:
The symptoms of the disease worsened significantly
Disease signs appeared earlier compared to mice carrying only the mutation
An important step towards future treatments
In the future, scientists believe that identifying essential marking sites may help stimulate the breakdown of the damaged protein, which could slow the progression of the disease.
Nguyen pointed out that the mutated protein may escape the disassembly process due to its structure changing and the marking being disrupted at vital sites, which hinders its elimination inside the cells.
New hope despite the absence of treatment
Although there is no cure yet, this discovery provides a deeper understanding of the biological mechanisms of the disease and may constitute a starting point for developing innovative therapeutic strategies that target the root of the problem rather than simply alleviating the symptoms.
date:2026-02-09 05:57:00