For many people born with hearing loss, the world has always been quiet. This type of hearing problem, known as congenital deafness, often begins at birth and can affect communication, education, and daily life.
In many cases, the cause is genetic, meaning it is linked to changes in certain genes that are passed down through families. Until recently, treatment options were limited to hearing aids or cochlear implants, which help but do not fully restore natural hearing.
Now, a new study from Karolinska Institutet in Sweden offers exciting hope. Researchers have found that gene therapy can significantly improve hearing in people with a specific type of genetic deafness. The study, published in the journal Nature Medicine, shows that this approach may help both children and adults.
The research team worked with hospitals and universities in China to treat ten patients aged between 1 and 24 years. All of these patients had hearing loss caused by changes in a gene called OTOF.
This gene is important because it helps produce a protein called otoferlin. This protein plays a key role in sending sound signals from the inner ear to the brain. Without it, the ear can detect sound, but the signals cannot be properly transmitted.
To solve this problem, the researchers used gene therapy. This method involves delivering a healthy copy of a gene into the body. In this case, they used a harmless virus called an adeno-associated virus to carry the working OTOF gene into the inner ear.
The treatment was given as a single injection into a small opening called the round window, located at the base of the cochlea.
The results were impressive. Many patients began to notice improvements in their hearing within just one month. After six months, all participants showed clear benefits. On average, the level of sound they could detect improved from very loud levels to much softer ones, meaning they could hear sounds that were previously too quiet.
Children showed the greatest improvement, especially those between the ages of five and eight. One young girl regained nearly normal hearing and was able to talk easily with her mother only a few months after treatment. This highlights how early treatment may lead to better outcomes.
Importantly, the therapy was also found to be safe. The most common side effect was a temporary change in certain blood cells, but no serious problems were reported during the follow-up period.
The researchers believe this is only the beginning. While this study focused on the OTOF gene, many other genes are also linked to hearing loss. Scientists are now working to develop similar treatments for these conditions.
If you care about hearing health, please read studies about antibiotic drug that can lead to hearing loss, and whether you should get an hearing aid or see a specialist.
For more health information, please read studies about how the Mediterranean diet could protect your brain health, and these antioxidants could help reduce dementia risk.
Source: Karolinska Institutet.
