For those who are born with hearing problems, the world has always been somewhat silent. This condition is called ‘congenital deafness’; It is detected at birth and has a profound impact on a person’s ability to communicate, learn, and lead everyday life. Often, the cause is genetic—specifically, changes in certain genes that are passed down from generation to generation. Until now, the only options available for such cases were hearing aids or cochlear implants; Although these devices help to some extent, they do not completely restore the natural ability to hear.
a new hope
Amidst this environment, a new research from Sweden’s Karolinska Institute has brought a new ray of hope. This research has been published in the prestigious scientific journal *Nature*. This research shows that gene therapy can significantly treat a certain form of congenital deafness—a major breakthrough that could have benefits for both children and young adults.
Where was this discovery made?
For this research, scientists collaborated with hospitals and universities in China to conduct a study that included 10 patients aged 1 to 24 years. In all these cases, the hearing loss was caused by mutations in the *OTOF* gene. This gene plays an important role in making a protein called ‘otoferlin’; This protein helps in transmitting sound signals from the ear to the brain. When this protein does not function properly, the ear detects sound waves, but those signals cannot effectively reach the brain.
How was this problem solved?
To solve this problem, researchers used gene therapy. In this technique a healthy gene is inserted inside the body. To do this, a working copy of the *OTOF* gene was delivered directly into the ear using a safe viral vector—specifically, an ‘adeno-associated virus’ (AAV). The procedure was accomplished through a micro-injection into a specific area at the base of the cochlea; This place is known as “round window”. The results were quite encouraging; Many patients notice improvements in their hearing within just one month of treatment. By the end of the six months, all participants had clear and visible benefits. He also began to hear sounds that were much louder than before—something that was previously impossible for him.
improvement in children
One special thing was that the maximum improvement was seen in children, especially in the age group of 5 to 8 years. One little girl in particular, within a few months of treatment, almost completely recovered her hearing and began talking to her mother without any difficulty. This also shows that if treatment is started at the right time, the results can be even better.