The TMEM108 gene helps support brain development and communication between nerve cells. If it does not work as expected, nerve cells may form or signal differently, which may influence behavior, attention, or mood. This gene plays an important role in pathways that help brain cells grow and connect. Research has linked some variants in the TMEM108 gene to conditions such as attention deficit hyperactivity disorder, bipolar disorder, and schizophrenia, but these links are still being clarified.
What is a gene?
Genes are segments of DNA that give your cells information they can use to make molecules or manage processes in the body. Some genes hold the instructions for producing proteins, the working parts of cells. Other genes mainly help regulate when certain processes happen, where they take place, and how strongly they operate. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. For a deeper look at this topic, you can find more in the LearnHub.
Overview
TMEM108Gene function
What if the gene works
The TMEM108 gene helps nerve cells grow and form connections in the brain. Its protein supports normal brain development and communication between neurons.
Risk
What if the gene does not work
Changes in the TMEM108 gene can range from milder to more severe and may reduce how well nerve cells build and maintain branching connections. Lower TMEM108 activity can make signaling and internal support within brain cells less stable.
Treatment
What does that mean for your treatment
No TMEM108-specific treatment or drug choice approach is currently established in clinical guidelines for pathogenic variants in the TMEM108 gene. The TMEM108 gene is being studied in early research on brain development and mental health conditions, but this has not changed routine treatment.
Gene function
What if the gene works
The TMEM108 gene is most active in the nervous system, where it helps brain cells grow and connect in an orderly way. Its protein sits at the cell surface and supports the shaping of nerve cell branches and communication points. This explains what the TMEM108 gene does in brain cells during normal development and day to day signaling.
The TMEM108 gene helps nerve cells form and shape their branching extensions. These branches let cells reach nearby partners and become part of working brain networks.
Its protein is part of the cell membrane, the outer layer that helps cells interact with their surroundings. This position supports organized signaling where nerve cells meet and communicate.
TMEM108 activity contributes to the setup and upkeep of brain circuits. Well organized circuits help the nervous system handle routine communication across many connected cells.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help shape normal human diversity, such as variations in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
TMEM108 gene variants can change how much protein a cell makes, how stable that protein is, and how well it reaches the cell membrane or binds to partner proteins. Understanding how TMEM108 gene variants affect protein function helps explain why some changes have only a mild effect, while more disruptive variants may sharply reduce or stop protein activity. In general, loss of function variants can range from partial to near complete loss, leading to different degrees of cellular impact.
How variants are linked to conditions
Research on TMEM108 gene variants and health conditions is still developing. The TMEM108 gene does not yet have a broadly confirmed link to a specific health condition, so anyone with a confirmed TMEM108-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widely found in the general population. Most do not directly affect health and simply contribute to natural human variation. For many genes, carrying a variant associated with a condition points to a possible link rather than a definite diagnosis, especially when several genes and environmental factors also play a role. In some situations, though, a single well characterized variant in a particular gene can be 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 TMEM108 gene. This gene has been studied most in relation to brain health, but any effect appears to be only one small part of overall risk, alongside many other genes and life factors. Anyone worried about personal or family risk should speak with a doctor or genetic counselor.
Inheritance of TMEM108 variants
There is not yet a broadly confirmed Mendelian inheritance pattern for a specific TMEM108-related condition, so TMEM108 gene inheritance is not described as autosomal dominant, autosomal recessive, or X-linked in routine clinical genetics. The TMEM108 gene is located on chromosome 3, which is an autosome. That means each person usually inherits one copy of the TMEM108 gene from each parent.
What does my TMEM108 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific health condition for TMEM108, although this can change as research grows. If you have a TMEM108 result and want to understand what it could mean for relatives, a doctor or genetic counselor can help explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
To look for TMEM108 variants, TMEM108 genetic testing usually uses a blood or saliva sample. A lab reads the DNA code in the TMEM108 gene and checks for differences from the usual sequence. Results may show a benign variant, a variant of uncertain significance, or a variant linked to health conditions.
When should I consider getting a genetic test?
There is not yet a broadly established TMEM108-specific reason for genetic testing in routine care. Decisions about testing are usually based on your personal health history, symptoms, and family history, and are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it explains varies by the condition and the kind of variant involved. Lifestyle, environment, age, and medical history are among the many factors that influence how the body functions over time. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most useful when considered alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, genetic results can also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, moves it through the body, or responds to it at its target. This helps explain why the same medication works well for one person, works less well for another, or causes more side effects in someone else. These differences are common and are one reason treatment response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics is the area of medicine that examines how differences in genes can affect the way a person responds to medications. It studies links between genes and drugs to help explain why the same treatment may work differently in different people. With many medicines, genes can influence either how strongly a drug works or how the body processes it. This information can support treatment choices that are both more informed and more tailored to the individual. More detail on this topic is available in the LearnHub.
Drugs influenced by the TMEM108 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 people respond to treatment. If you have side effects, trouble finding a treatment that works well, or concerns about how your medicines fit with your overall health, talk with your doctor.