The GPR155 gene helps cells send and receive signals, especially in the brain, by making a receptor-like protein that supports cell communication. If it does not work as expected, these signals may become less coordinated, which can affect how some nerve cells function. Most variants in this gene have little effect on how your body works, while a smaller number are being studied for possible links to brain related conditions and some cancers.
What is a gene?
A gene is a piece of DNA that holds instructions your cells use to make molecules or regulate processes in the body. Some genes provide the instructions for producing proteins, the parts of cells that do the work. Others mainly control 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, and medications. For a deeper look at this topic, more information is available in the LearnHub.
Overview
GPR155Gene function
What if the gene works
The GPR155 gene helps make a protein found in brain cells and other tissues. It likely supports cell-to-cell signaling, especially in the nervous system.
Risk
What if the gene does not work
Variants in the GPR155 gene can range from milder to more severe and may reduce how much GPR155 protein a cell makes or how well it works at the cell surface. This can alter cell signaling and communication between cells.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently guided by pathogenic or loss-of-function variants in the GPR155 gene. In research, reduced GPR155 activity is being explored as a biomarker in some cancers, but this does not yet direct routine treatment.
Gene function
What if the gene works
Healthy nerve cells depend on steady messaging to keep body functions coordinated. The GPR155 gene helps make a protein in the cell membrane, the cell's outer layer, that supports this signaling. This helps explain how the GPR155 gene supports nerve cell communication in everyday body function.
The protein made from the GPR155 gene sits in the cell membrane, the cell's outer layer. From there, it supports how cells sense nearby signals and pass messages inward.
GPR155 activity is strongest in the nervous system, where cells need precise communication. It helps nerve cells handle signals in a steady, coordinated way.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, such as variation in appearance, metabolism, or how the body responds to environmental influences. Many variants do not cause any noticeable effect and are simply part of the natural range of genetic variation. In some situations, though, a variant changes how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the GPR155 gene can change the protein's shape, make it less stable, or keep it from reaching the cell surface, which helps explain how variants influence the GPR155 gene's function. Some are milder and only partly reduce protein activity or its interactions with other cell parts. More severe variants may lead to a shortened protein or very little protein being made, so the functional effect is often greater.
How variants are linked to conditions
Current evidence does not yet show a broadly confirmed link between variants in the GPR155 gene and a specific health condition, though research can evolve over time. Work on how variants of the GPR155 gene are linked to conditions is still developing, and anyone with a confirmed GPR155-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 normal feature of human biology and are common across the general population. Most do not directly affect health and simply contribute to natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors play a part. In some situations, 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 is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the GPR155 gene. Anyone with concerns about personal or family risk can discuss their medical history and any genetic results with a doctor or genetic counselor.
Inheritance of GPR155 variants
There is not yet a broadly confirmed disease inheritance pattern tied to the GPR155 gene, so how GPR155 variants are inherited in relation to a specific medical condition is still being worked out. Current evidence does not support naming a single well-established pattern such as autosomal dominant or autosomal recessive for this gene. The GPR155 gene is located on chromosome 2, which is an autosome, so each person inherits one copy from each parent.
What does my GPR155 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific health condition for GPR155, although this can become clearer as research grows. If you have a GPR155 result and want to understand what it may mean for close relatives, a doctor or genetic counselor can help put it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
Variants in the GPR155 gene are usually found through GPR155 genetic testing, using DNA from a blood sample or saliva. A laboratory reads the gene's code and compares it with a reference sequence to identify differences, then classifies each variant by the evidence for its health effect.
When should I consider getting a genetic test?
There is not yet a broadly established, GPR155-specific reason for genetic testing in routine care. Decisions about testing are best made with a doctor or genetic counselor, based on your symptoms, medical history, and family history.
A genetic result is only one part of your health story
A genetic result can be informative, but what it tells you varies based on the condition and the kind of variant involved. Factors such as lifestyle, environment, age, and medical history also shape how the body functions over time. For some conditions, especially those affected by many genes, genetic information provides context rather than certainty and is best understood 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 help frame individual experiences.
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 may work well for one person but cause more side effects or less benefit in another. These differences are common and are one of several reasons treatment response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences shape the way a person responds to medications. By looking at links between genes and drugs, it helps explain why the same treatment may work differently from one person to another. For many medicines, genes affect both how strongly a drug works and how the body handles it. This understanding can support treatment decisions that are more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the GPR155 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choices. If you have side effects, poor symptom control, or questions about how a medicine is working, talk with your doctor or pharmacist.