The TENM1 gene helps guide growing nerve cells as the brain and smell pathways develop. This gene plays an important role in helping nerve cells find the right partners and form stable connections. If the gene does not work properly, some people may be born with a reduced or absent sense of smell, and certain variants may also be linked to differences in learning or brain development. Effects can vary depending on the specific variant.
What is a gene?
A gene is a piece of DNA that carries instructions your cells use to make molecules or regulate processes in the body. Some genes provide the directions for producing proteins, which are the parts of cells that do the work. Other genes mostly help determine when certain processes happen, where they happen, and how active they are. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, or medicines. To go into this topic further, you can find more in the LearnHub.
Overview
TENM1Gene function
What if the gene works
The TENM1 gene helps nerve cells connect as the brain develops, especially in smell pathways. It supports cell to cell signaling and guides growing nerve fibers to the right targets.
Risk
What if the gene does not work
Milder variants in the TENM1 gene may cause reduced smell, while more severe variants can lead to absent smell from birth.
Treatment
What does that mean for your treatment
No TENM1-specific treatment or management approach is currently established, so treatment is based on the person’s symptoms and usual clinical care rather than on a pathogenic variant in the TENM1 gene itself.
Conditions associated with TENM1
Gene function
What if the gene works
Nerve cells need clear guidance as the brain and sensory system develop. The TENM1 gene helps nearby cells recognize each other and form organized connections. It is especially important in building stable nerve cell networks. Understanding what the TENM1 gene does in the body helps explain how cells create reliable wiring over time.
The TENM1 gene makes a surface protein that helps nerve cells recognize and attach to the right neighboring cells. This matching step supports organized growth in the developing nervous system.
During development, the TENM1 gene helps growing nerve fibers respond to local guidance cues and reach the correct area. This supports precise wiring instead of random connections.
Its protein helps organize contact points between nerve cells, where messages pass from one cell to the next. This can help keep communication pathways steady as nerve networks mature.
What is a variant?
A genetic variant is a minor difference in the DNA code within a gene. These differences are common and help explain normal variation among people, such as appearance, metabolism, or the way the body reacts to environmental factors. Many variants do not cause any noticeable change and are simply part of natural genetic diversity. In some situations, though, a variant can affect how a gene works more strongly and may play a role in, or directly cause, a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TENM1 gene can change how the TENM1 protein folds, reaches the cell surface, or binds to partner proteins, which is part of how variants influence the TENM1 gene's function. Milder variants may only partly weaken protein stability or signaling between cells. More disruptive variants can greatly reduce protein production or leave the protein unable to interact normally with nearby cells.
How variants are linked to conditions
Current evidence on how TENM1 gene variants are linked to conditions is still developing. The TENM1 gene does not yet have a broadly confirmed link to a specific health condition, and anyone with a confirmed variant in the TENM1 gene should use guidance from their doctor or genetic counselor to understand what that result means.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of being human, and they are widespread in the general population. Most do not directly affect health and instead reflect normal human variation. For many genes, having a variant associated with a condition points to a possible link, not a certain diagnosis, particularly when several genes and environmental factors also play a role. In some situations, though, one well characterized variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the TENM1 gene. If you have a TENM1 change or it runs in your family, a doctor or genetic counselor can help explain what it may mean for your personal risk.
Inheritance of TENM1 variants
There is not yet a broadly confirmed disease inheritance pattern for the TENM1 gene, so the TENM1 inheritance pattern is still being clarified as research develops. The TENM1 gene is located on the X chromosome, which means inheritance can differ between sons and daughters. A child receives one X chromosome from their mother, while daughters also receive an X chromosome from their father. Because of that chromosome pattern, changes in the TENM1 gene may be passed through families in sex-specific ways.
What does my TENM1 result mean for my family?
TENM1 results may have family implications because this gene has been linked to a rare inherited form of lifelong loss of smell that can run in families in an X-linked pattern. That can mean male relatives are more likely to have symptoms, while some female relatives may carry the change and may or may not notice problems with smell. Close relatives may want to share the result with their own doctor or genetics team when discussing family history.
Genetic information
Genetic testing
How you find out about variants
TENM1 genetic testing uses a blood or saliva sample to read the TENM1 gene and look for variants. It may be done as a single gene test, as part of a larger panel, or through exome sequencing, and the results can clarify whether a TENM1 variant is present.
When should I consider getting a genetic test?
There is not yet a broadly established, TENM1-specific reason for genetic testing in most people. Testing may be considered with a doctor or genetic counselor if there is a lifelong loss of smell, delayed puberty, or a family history of these problems.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it reveals depends on the condition and the kind of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. For some conditions, especially those shaped by many genes, genetic information provides context rather than certainty and is most helpful when viewed alongside other parts of care. In other situations, a genetic result may offer a clear answer. In areas like medication response, genetic results can also help put individual experiences into perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in genes can change how the body breaks down a drug, moves it through the bloodstream, or responds to it at its target, so the same treatment may work better for some people than for others. This is common and can influence how much benefit a medicine gives or how sensitive someone may be to side effects.
What is Pharmacogenetics?
Pharmacogenetics studies how genetic differences can affect a person’s response to medications. It examines the relationship between genes and drugs to help explain why treatments may work differently from one person to another. For many medicines, genes can influence how strongly a drug works or how the body handles it. This information can help support more informed and personalized treatment decisions. If you want to explore this subject further, you can learn more in the LearnHub.
Drugs influenced by the TENM1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or how well they work, so any concerns about side effects, medication changes, or your general health are best discussed with your doctor.