The DAOA gene appears to help fine tune chemical signaling between brain cells, especially in pathways that use glutamate, a messenger important for memory, mood, and thinking. If this gene works differently, that signaling may become less balanced. Many variants are harmless, while a few may slightly change how this brain signaling system works. Some variants in the DAOA gene have been linked to conditions such as schizophrenia and bipolar disorder, but they influence risk rather than making a diagnosis.
What is a gene?
Genes are sections of DNA that hold instructions your cells can use to make molecules or regulate processes in the body. Some genes carry the directions for producing proteins, the parts of cells that do much of the work. Other genes mostly help determine when certain processes happen, where they happen, and how strongly they take place. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. To go into this topic in more detail, you can find more in the LearnHub.
Overview
DAOAGene function
What if the gene works
The DAOA gene is active mainly in the brain and may help fine tune signals between nerve cells. It is thought to support chemical messaging linked to learning, memory, and mood.
Risk
What if the gene does not work
Changes in the DAOA gene may influence regulation of signaling pathways linked to D-amino acid oxidase. Milder variants may have little effect, while more severe variants can change gene activity more noticeably.
Treatment
What does that mean for your treatment
No DAOA-specific treatment or management approach is currently established. The DAOA gene is still being studied as a possible biomarker in schizophrenia and bipolar disorder research, but this has not changed routine drug choices.
Gene function
What if the gene works
In the brain, the DAOA gene is linked to everyday chemical signaling between nerve cells. Its activity appears to influence messenger pathways that help cells pass signals in a balanced way. Understanding how the DAOA gene works in the brain helps explain its place in normal brain communication.
The DAOA gene is associated with pathways that help nerve cells send and receive messages. This supports smooth communication across brain networks used for attention, memory, and other daily mental tasks.
Its protein appears to influence D-serine, a small molecule that helps certain brain receptors respond to signals. By shaping this system, the DAOA gene contributes to steady glutamate signaling in the brain.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and are part of normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. Sometimes, though, a variant changes how a gene works more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the DAOA gene may change how much RNA is made, how it is spliced, or how stable the gene product is inside cells. Research on how DAOA gene variants affect cell signaling suggests that many changes have subtle effects, while more disruptive variants can markedly reduce or alter the gene’s cellular activity. This functional range can produce mild shifts in downstream signaling or, in some cases, a near loss of effect.
How variants are linked to conditions
The DAOA gene does not yet have a broadly confirmed link to a specific health condition, even though studies have explored how DAOA gene variants are linked to conditions in different groups of people. Research in this area is still developing, so anyone with a confirmed finding in the DAOA gene should rely on guidance from their doctor or genetic counselor rather than general information.
A variant is not necessarily a diagnosis
Gene variants are a normal part of human biology and are common across the general population. Most have no direct impact on health and simply reflect natural human diversity. For many genes, carrying a variant tied to a condition indicates a possible association rather than a clear diagnosis, especially when more than one gene and environmental factors play a role. In some cases, though, a single well characterized variant in a specific gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There isn't yet broadly confirmed evidence on specific factors that increase or reduce risk related to the DAOA gene. Changes in DAOA have been studied in conditions such as schizophrenia and bipolar disorder, but any effect appears to be small and shaped by many other genes and life factors.
Inheritance of DAOA variants
There is not yet a broadly confirmed Mendelian pattern for the inheritance of DAOA gene variants tied to a specific DAOA related condition. Research has explored links between the DAOA gene and traits such as mental health risk, but these findings do not support a clear autosomal dominant, autosomal recessive, or X linked inheritance pattern. The DAOA gene is located on chromosome 13, which is an autosome, so each person inherits one copy from each parent.
What does my DAOA result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for DAOA, though this can change as research develops. If you have a DAOA result and questions about what it could mean for your family, 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
DAOA genetic testing is usually done as part of a multigene panel, exome, or genome test using a blood, saliva, or cheek swab sample. The lab reads the DAOA gene to look for variants and classifies them as benign, uncertain, or more likely to affect health. DAOA genetic test results are interpreted alongside personal and family history because this gene is not usually used on its own to confirm a diagnosis.
When should I consider getting a genetic test?
There is not yet a broadly established reason to get genetic testing just for the DAOA gene. Decisions about testing are usually based on your overall personal and family history and are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
Genetic results can provide valuable insight, but how much they explain varies by the condition and the type of variant involved. Lifestyle, environment, age, and medical history, among other factors, also shape how the body functions over time. In some conditions, especially those influenced 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 such as medication response, these results can 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 treatment works well for one person, works less well for another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies the relationship between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body processes it. This understanding can support more informed, more individualized treatment decisions. You can explore this topic in more detail in the LearnHub.
Drugs influenced by the DAOA gene
When should I seek medical advice?
There isn’t a broadly confirmed role for this gene in guiding medicine choices right now, so medication concerns are best discussed with your doctor. DAOA has been studied in mental health research, including possible links with how some people respond to certain psychiatric medicines, but this is not part of routine treatment decisions.
History
The DAOA gene entered genetics research in the early 2000s, when scientists were searching for inherited factors linked to schizophrenia and bipolar disorder. Initially understood only through visible traits, later recognized as tied to a specific gene, this area of research drew attention because early studies suggested that DAOA might help explain part of the inherited risk for certain mental health conditions. It was first widely known as G72, and the name later changed as scientific classification became more precise. Over time, descriptions became more precise, and larger studies showed a more mixed picture than the earliest reports suggested. Today, DAOA is remembered as part of an important period in psychiatric genetics, when many possible risk genes were being identified and carefully rechecked.