Hearing is an essential factor in how we can connect with others around us and how we experience the world. Hearing loss can be caused by aging, illness, exposure to loud noises, certain medications, or genetics. There are also specific genetic factors that can be passed down through families.
It’s important to understand how genes can affect hearing health so hearing health professionals can better diagnose and treat hearing loss. Below, we will explore genetic hearing loss and available treatment options.
Genetic Hearing Loss
Hearing loss that occurs because of changes or mutations in a person’s DNA is known as genetic hearing loss. DNA provides instructions known as genes to help our bodies grow and develop.
Each person has thousands of genes that we rely on every day. When a gene malfunctions, it can cause a person to be born with hearing loss or increase the likelihood that it will develop later in life.
Types of Genetic Hearing Loss
There are two main types of genetic hearing loss:
- Syndromic Hearing Loss
- Nonsyndromic Hearing Loss
Syndromic Hearing Loss
This is when a health condition causes both hearing loss and other issues, such as heart problems or kidney problems, at the same time.
Some common syndromes that include hearing loss are:
- Usher Syndrome – This syndrome causes both hearing and vision loss
- Waardenburg Syndrome – This syndrome impacts hearing and may change the color of a person’s eyes or hair
- Alport Syndrome – This syndrome affects hearing and kidney function
Nonsyndromic Hearing Loss
This occurs when hearing loss is the only health issue. This is the most common type of genetic hearing loss.
Inherited Generic Hearing Loss
Genetic hearing loss is passed down from parents to children in different ways. These are known as inheritance types. The most common ones are listed below:
- Autosomal Recessive: This occurs when a child inherits faulty genes from both parents. In most cases, the parents have normal hearing but ‘carry’ the defective gene.
- Autosomal Dominant: A child inherits the faulty gene from just one parent, who may also have hearing loss.
- X-linked: This happens when one faulty gene is found on the X chromosome and impacts boys more frequently than girls.
- Mitochondrial: This occurs when the faulty gene is passed down from only the mother and can affect boys and girls equally.
It’s essential to understand how inherited hearing loss occurs to better treat and diagnose it.
Diagnosing Genetic Hearing Loss
Hearing health professionals recommend the use of several tools to help determine if hearing loss is caused by genetics. The most common are listed below:
- Newborn Hearing Screenings – These tests are performed shortly after birth to check for any obvious hearing problems.
- Hearing Tests (Audiometry) – This test can determine how well an individual hears different sounds and various tones.
- Genetic Testing – This is performed on a blood or saliva sample and tested to look for faulty genes related to hearing.
When hearing health professionals can determine a genetic cause, they can predict how hearing loss might change over time and if other family members might be affected.
Treatment and Support
It is important to understand that genetic hearing loss cannot be cured. However, various treatments are available to help individuals with genetic hearing loss communicate more effectively.
- Hearing Aids – These are worn either on or inside the ear canal and amplify sounds to make them easier to identify.
- Cochlear Implants – These are surgically implanted and help those with severe hearing loss.
- Speech and Language Therapy – This can provide proven methods to help develop speaking and listening skills.
- Sign Language and Communication Tools – Provides other ways to communicate effectively.
Conclusion
Genetic hearing loss is quite common, even more so in children. It can be passed down through families and can occur as part of a syndrome or on its own. While it typically can’t be prevented, if it is properly diagnosed, there are treatment options available.
Understanding the role of genes can help hearing health professionals provide earlier diagnosis and better treatment methods. With the help of doctors, hearing professionals, and support from family, individuals with genetic hearing loss can live full and successful lives. Continued research and awareness will help even more people in the future.