The ADGRL3 gene helps nerve cells connect and pass signals, especially in brain networks involved in attention, movement, and self control. This gene plays an important role in early brain development and in how synapses, the contact points between nerve cells, work. If the gene does not work as expected, these signals may be less well regulated. Some variants in the ADGRL3 gene are linked to a higher chance of attention deficit hyperactivity disorder, but they do not by themselves determine behavior or confirm a diagnosis.
What is a gene?
A gene is a section of DNA that holds instructions cells can use to make molecules or regulate processes in the body. Some genes carry the code for proteins, the cell parts that do the work. Others mainly direct when certain processes happen, where they happen, and how strongly they are carried out. As a group, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. For a deeper look at this topic, more information is available in the LearnHub.
Overview
ADGRL3Gene function
What if the gene works
Across many tissues, the ADGRL3 gene helps nerve cells connect and signal each other. It is especially active in the brain, where it supports how brain circuits form and communicate.
Risk
What if the gene does not work
Changes in the ADGRL3 gene can range from milder to more severe variants, which may reduce how well this protein at the cell surface helps nerve cells connect and communicate. This can disrupt signaling pathways involved in brain development.
Treatment
What does that mean for your treatment
No ADGRL3-specific treatment or management approach is currently established in clinical guidelines. The ADGRL3 gene is being studied as a possible biomarker for attention deficit hyperactivity disorder treatment response, including whether some variants may relate to stimulant effects, but this has not entered routine prescribing.
Gene function
What if the gene works
The ADGRL3 gene helps nerve cells connect, send signals, and organize healthy brain circuits. Its protein sits on the cell surface, where it helps cells sense and respond to nearby cells. This role is especially important during brain development and everyday communication between nerve cells.
Its protein acts like a surface receiver that helps cells detect messages from nearby cells. This supports coordinated signaling between nerve cells.
It helps neighboring cells recognize each other and make stable contact. In the brain, this supports how brain cells connect and communicate.
It helps organize synapses (the contact points where nerve cells pass messages). This supports orderly brain wiring and smooth information flow.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not cause any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change 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 ADGRL3 gene can change the shape, processing, or cell surface placement of its receptor protein, which may weaken how nerve cells recognize nearby signals and pass messages inward. These ADGRL3 gene variant effects on protein signaling can range from mild changes in receptor activity to more severe variants that reduce stability, disrupt partner binding, or keep the protein from working at the cell membrane.
How variants are linked to conditions
Variants in the ADGRL3 gene are most consistently associated with attention deficit hyperactivity disorder (ADHD). In studies of ADGRL3 gene variants linked to ADHD, some changes have also been associated with impulsive or disruptive behavior patterns and a higher chance of substance use problems, though findings vary. These are risk associations, not a diagnosis, so carrying a variant does not mean a person will develop these conditions.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are common across the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors also play a role. In some situations, though, a single well understood variant in a particular gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
Changes in the ADGRL3 gene are linked with a tendency toward attention-related traits, but they do not determine on their own whether someone will have ADHD. Overall risk is shaped by many genes and by life factors such as family history, pregnancy exposures, early life stress, sleep, and the home and school environment.
Inheritance of ADGRL3 variants
There is not yet a broadly confirmed Mendelian pattern for how ADGRL3 gene variants are inherited in relation to a specific disease, even though this gene has been studied for links to attention and behavior traits. In practice, how ADGRL3 gene variants are inherited follows ordinary family inheritance, with one copy coming from each parent. The ADGRL3 gene is located on chromosome 4, which is an autosome, so it is inherited similarly in males and females. Any effect on health or traits can vary widely and is not determined by this gene alone.
What does my ADGRL3 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific single-gene condition for ADGRL3. Changes in this gene are mostly studied as part of a person’s overall tendency toward traits like attention or behavior, rather than as a clear-cut inherited condition passed through families in a predictable way.
Genetic information
Genetic testing
How you find out about variants
ADGRL3 genetic testing uses a blood or saliva sample, and the lab reads the ADGRL3 gene to look for variants, often as part of a larger gene panel or exome test. Results can show a common benign variant or a rarer change, but an ADGRL3 finding alone usually does not confirm a diagnosis.
When should I consider getting a genetic test?
There isn't yet a broadly established, ADGRL3-specific clinical reason for testing. Decisions about genetic testing are usually based on the bigger picture, including symptoms, family history, and whether a doctor or genetic counselor thinks a broader test could be helpful.
A genetic result is only one part of your health story
A genetic result can be informative, but what it tells you varies by the condition and the type of variant involved. Over time, many factors also influence how the body functions, including lifestyle, environment, age, and medical history. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most useful when viewed together with other parts of care. In other situations, a genetic result may 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 bloodstream, or responds to it at its target. This helps explain why the same medication may work well for one person but less well for another, or why some people are more sensitive to side effects. These differences are common and are one part of the bigger picture, along with age, other health conditions, and other medicines.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes affect the way medications work. It studies gene-drug patterns to help explain why the same treatment can have different effects in different people. For many medicines, genes influence how the body handles a drug and how strong its effects are. This information can support treatment choices that are more informed and more individualized. To learn more about this subject, you can read further in the LearnHub.
Drugs influenced by the ADGRL3 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medicine choices, so general questions about symptoms, treatment, or side effects are best discussed with your doctor. ADGRL3 has been studied in attention-deficit/hyperactivity disorder (ADHD), where some research suggests it may be linked to response to stimulant medicines, but this is not used on its own to make treatment decisions.
History
The ADGRL3 gene first entered the scientific literature under the earlier name LPHN3, as researchers were sorting a growing family of related genes. Scientific classifications changed as researchers learned more about the gene. In the late 2000s, interest in the ADGRL3 gene increased when studies linked inherited variants in this gene with attention deficit hyperactivity disorder, or ADHD. That work helped move the gene from a mainly laboratory topic into clinical genetics research on behavior and development. Later, as gene naming systems were updated, LPHN3 was renamed ADGRL3 to better reflect its place in a broader gene family.