The IL27RA gene helps immune cells receive signals from interleukin 27, a messenger that helps balance inflammation and guide part of the body’s defense system. If this gene does not work properly, immune responses may be less well controlled, which can affect how your body reacts to infections and inflammatory triggers. This gene plays an important role in keeping immune activity measured rather than overactive.
What is a gene?
Within DNA, a gene is a stretch that carries information cells use to make molecules or guide processes in the body. Some genes hold instructions for producing proteins, the parts of cells that do the work. Other genes mainly regulate when certain processes take place, where they happen, and how strongly they operate. In combination, genes influence the body’s development and function, and they can also shape how you respond to food, stress, or medications. For a more in depth look at this topic, you can find more in the LearnHub.
Overview
IL27RAGene function
What if the gene works
The IL27RA gene helps immune cells respond to the signal protein interleukin 27. This supports balanced inflammation and helps guide how certain T cells develop and act during infection.
Risk
What if the gene does not work
Variants in the IL27RA gene can range from milder to more severe and may weaken or block IL-27 signaling. This can change how immune cells communicate, especially signals that help guide inflammation and white blood cell responses.
Treatment
What does that mean for your treatment
No IL27RA-specific treatment or drug selection approach is currently established in clinical guidelines for pathogenic variants in the IL27RA gene. The IL27RA gene is being studied as an immune signaling target and possible biomarker in inflammatory conditions and some cancers.
Gene function
What if the gene works
The IL27RA gene helps immune cells receive and interpret signals from a messenger protein called interleukin 27. Understanding how the IL27RA gene works in the immune system helps explain how the body coordinates defense and keeps inflammation measured. When this pathway is working normally, immune responses are better timed and more organized.
The IL27RA gene makes part of a receptor that sits on the surface of immune cells. When interleukin 27 attaches, the cell gets a message to change its activity.
This receptor helps guide T cells, which are white blood cells that direct immune responses. It supports the development and activity of T cells that help the body respond to germs in a coordinated way.
Signals through the IL27RA gene help fine tune inflammation so immune activity stays controlled. This supports a response that is active when needed but less likely to keep escalating.
What is a variant?
A genetic variant is a small change in the DNA sequence of a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants have no noticeable effect and are simply part of natural genetic variation. In some cases, 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
Variants in the IL27RA gene can change the receptor’s shape, stability, or delivery to the cell surface, so immune cells receive a weaker signal. Milder changes may partly reduce receptor binding or downstream cell messaging, while more severe variants, including some stop or splice changes, can greatly cut or abolish protein production. In practice, how variants in the IL27RA gene affect protein function depends on the change, ranging from partial loss of signaling to near complete loss.
How variants are linked to conditions
The IL27RA gene does not yet have a broadly confirmed link to a specific health condition, although research on how IL27RA gene variants may relate to disease risk is still developing. If you have a confirmed variant in the IL27RA gene, your doctor or genetic counselor can explain what it may mean in the context of your own health and family history.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a normal feature of human biology. Most do not directly affect health and instead reflect natural variation among people. For many genes, having a variant linked to a condition points to a possible association rather than confirming that diagnosis, particularly when several genes and environmental influences play a role. There are exceptions, though, and a single well-characterized variant in a particular gene can sometimes 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 clearly increase or reduce health risk related to the IL27RA gene. If an IL27RA change is found on testing, a doctor or genetic counselor can help explain what it may mean in the context of personal and family history.
Inheritance of IL27RA variants
There is not yet a broadly confirmed, disease specific Mendelian pattern for how IL27RA gene variants are inherited, so a single label such as autosomal dominant or autosomal recessive is not firmly established for this gene. Current understanding of how IL27RA gene variants are inherited may change as research develops. The IL27RA gene is located on chromosome 19, which is an autosome, so you inherit one copy from each parent.
What does my IL27RA result mean for my family?
There is not yet a broadly confirmed inherited pattern tied to a specific, well-established health condition for IL27RA, and research on this gene is still developing. If you have an IL27RA 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 family's health history.
Genetic information
Genetic testing
How you find out about variants
IL27RA genetic testing looks for changes in the IL27RA gene using a blood sample, saliva, or a cheek swab. A lab reads the DNA code and compares any variant with known medical evidence. Results may show a harmless change, a finding linked to a genetic condition, or a change whose meaning is still unclear.
When should I consider getting a genetic test?
There isn't yet a broadly established, IL27RA-specific clinical reason for testing. Testing decisions are best made with a doctor or genetic counselor, based on your symptoms, family history, and the wider reason genetic testing is being considered.
A genetic result is only one part of your health story
Genetic results can be very informative, but how much they reveal varies by the condition and the specific type of variant. Many other factors, including lifestyle, environment, age, and medical history, also influence how the body works over time. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best understood as part of the broader picture of care. In other situations, a genetic result may give a clear answer. In areas such as medication response, these results can also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds to medicines. Some people process a drug differently, so the same treatment may work better for one person, have less effect in another, or lead to more side effects. These differences are common and help explain why medication response can vary from person to person. Age, liver and kidney function, and other medicines can also shape how a treatment works.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medications. It focuses on 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 affect both how strongly a drug works and how the body processes it. Understanding this can support more informed, more individualized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the IL27RA gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medicine choice or dose, so questions about side effects, poor response, or changes to treatment are best discussed with your doctor.
History
In the early 2000s, researchers identified the IL27RA gene while studying how immune cells communicate. It was first described as part of a receptor on the surface of certain white blood cells, helping explain how the signal molecule IL-27 is received. Initially understood only through immune cell behavior, later recognized as tied to a specific gene, IL27RA became part of a broader effort to map the body’s signaling pathways. From these first observations, research expanded steadily. Scientists then connected the gene to T cell responses and inflammation, which placed it within the growing field of immune regulation. Its history is mainly a story of modern immunology, where step by step work clarified how immune messages are passed from one cell to another.