Scientists have discovered a new genetic cause of rare movement disorders such as ataxia and hereditary spastic paraplegia, which affect balance, walking, and muscle control.
The findings show that changes in a gene not previously linked to these conditions may disrupt how nerve cells communicate in the body, making movement difficult.
The research shows that changes in a specific gene can cause serious problems in how the nervous system works, leading to conditions such as ataxia, hereditary spastic paraplegia, and dystonia. These disorders make it difficult for people to walk properly, control their muscles, or maintain balance.
The study, published in Nature Communications, focused on thousands of patients with unexplained movement problems that known genetic causes could not fully explain. By studying their DNA, researchers identified a previously unknown link between a gene and a rare neurological condition.
The gene identified in the study was previously known for its role in the immune system. It was not thought to have any major function in the brain or nervous system. However, the new research shows that it also plays a key role in helping nerve cells communicate with each other.
“Nerve cells in the brain and spinal cord rely on fast and accurate communication to control movement. When this communication is disrupted, a person may develop problems with coordination, muscle stiffness, or uncontrolled movements. The study found that changes in this gene can interfere with that communication process,” the research stated.
Scientists explained that the gene produces a protein that works closely with other proteins involved in nerve signalling. These proteins help brain cells send and receive messages that control movement. When the gene is faulty, this system does not work properly, leading to breakdowns in nerve communication.
The researchers discovered that this disruption affects important pathways in the nervous system, especially those involved in motor control. As a result, people with the genetic change may experience symptoms such as difficulty walking, poor balance, and muscle stiffness that can worsen over time.
To reach these conclusions, the scientists combined genetic testing with laboratory experiments. They analysed DNA from thousands of people with different movement disorders and then studied how the gene behaves inside cells. This helped them understand not just which gene was involved, but also how it causes disease.
Experts say this type of research is important because many rare neurological diseases are still not fully understood. In many cases, patients go years without a clear diagnosis because the genetic cause of their condition is unknown. Discoveries like this can help improve diagnosis and give families clearer answers.
The study also provides new insight into a condition known as spastic ataxia. This is a rare disorder that affects both muscle stiffness and coordination. It can appear at different ages and may progress slowly or quickly depending on the person and the underlying cause.
“By identifying this new genetic link, scientists believe doctors may be able to improve genetic testing for patients with unexplained movement problems. This could make it easier to diagnose conditions earlier and provide better support and care," the scientists added.
Researchers also say the discovery may help guide future treatments. Although there is currently no cure for these disorders, understanding how the gene affects nerve communication could eventually lead to new therapies that target the root cause of the disease rather than just the symptoms.
Medical experts describe the findings as an important step forward in neurogenetics, the field that studies how genes affect the brain and nervous system. They say it shows how even genes previously linked to other parts of the body can have unexpected roles in brain function.
However, scientists also note that more research is needed. They want to understand how common these gene changes are and whether they are responsible for other neurological conditions as well. Larger studies and further laboratory work will help confirm the findings.
Despite the need for more research, experts agree that the discovery is a breakthrough. It adds a new piece to the puzzle of how the brain controls movement and why some people develop rare but serious movement disorders.
The study shows that a newly identified genetic change can disrupt how nerve cells talk to each other. This communication breakdown can lead to serious movement problems, but understanding it brings scientists one step closer to better diagnosis and future treatments.
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