METRNL is a gene that helps make a signaling protein released by muscle and fat tissue, especially during exercise or cold exposure. This gene helps your body balance energy use, keep inflammation more controlled, and support tissue repair. If the METRNL gene does not work as expected, these processes may be less well regulated, which can influence blood sugar handling, body weight, and recovery after physical stress or injury. METRNL is mainly discussed in research, especially in studies of metabolism, exercise, and fat tissue.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or regulate processes in the body. Some genes hold the directions for producing proteins, the parts of cells that do the work. Others mainly guide when certain processes take place, where they occur, and how strongly they operate. Together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. To explore this subject in more detail, you can find more in the LearnHub.
Overview
METRNLGene function
What if the gene works
The METRNL gene helps make a signaling protein released by muscle and fat tissue. This protein supports energy balance and helps guide immune activity, especially during exercise and cold exposure.
Risk
What if the gene does not work
Variants in the METRNL gene can reduce or alter production of the METRNL signaling protein, which helps cells coordinate energy use and immune activity. Milder variants may shift signaling, while more severe variants can clearly disrupt these cell-to-cell messages.
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 METRNL gene. METRNL is being studied mainly as a possible biomarker in metabolic and inflammatory conditions, rather than as an established treatment target.
Gene function
What if the gene works
Your body uses the METRNL gene to make a signaling protein released by muscle and fat tissue. It helps cells communicate about energy use, heat production, and everyday recovery. Understanding how the METRNL gene works in the body also helps explain how exercise and cold can trigger helpful body wide responses.
The METRNL gene makes a protein that is sent out of certain cells as a signal. This helps muscle, fat, and immune tissues coordinate routine body responses.
In fat tissue, the METRNL gene helps adjust how fuel is used and how much heat is made. This is part of the normal function of the METRNL gene in the body during exercise and cold exposure.
Its protein helps guide immune cells toward a balanced response that supports tissue repair. This can help keep everyday inflammation controlled after activity or mild stress.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not cause any noticeable effect and are simply part of natural genetic variation. In some situations, however, a variant can more clearly change how a gene functions and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the METRNL gene can change how the protein is built, how stable it is, or how well it is released from cells, which helps explain how METRNL gene variants affect protein function. Some changes may have a mild effect, such as slightly reducing protein stability or secretion. More disruptive variants, including those that alter RNA splicing (the step that edits genetic instructions into a usable message) or introduce an early stop signal, can sharply reduce or eliminate protein production.
How variants are linked to conditions
At this stage, research on METRNL gene variants and health conditions has not established a broadly confirmed link to one specific condition, though this may change as evidence grows. If you have a confirmed variant in the METRNL gene, your doctor or genetic counselor can explain what it may or may not mean in your own situation.
A variant is not necessarily a diagnosis
Changes in DNA are a normal part of human biology and are widely seen in the general population. Most of these variants do not directly affect health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a confirmed diagnosis, especially when multiple genes and environmental factors play a role. In some situations, however, a single well-characterized variant in a particular 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 METRNL gene. If METRNL is mentioned in your test results, a doctor or genetic counselor can help explain what it may mean in the context of your personal and family health history.
Inheritance of METRNL variants
There is not yet a broadly confirmed, disease specific inheritance pattern for the METRNL gene, so a single METRNL gene inheritance pattern is not currently used in routine medical genetics. The METRNL gene is located on chromosome 17, which is an autosome. This means each person inherits one copy of the METRNL gene from their mother and one copy from their father.
What does my METRNL result mean for my family?
There is not yet a broadly confirmed inherited pattern linking the METRNL gene to a specific genetic condition in families, though this may become clearer as research grows. If you have a METRNL result and want to understand what it could mean for relatives, a doctor or genetic counselor can help put it in the context of your personal and family health history.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the METRNL gene, genetic testing reads DNA from a blood or saliva sample. In practice, METRNL genetic testing for variants is usually done as part of a multigene panel or broader sequencing test, and the report may classify findings as benign, uncertain, or clinically relevant based on current evidence.
When should I consider getting a genetic test?
There is not yet a broadly established, METRNL-specific medical reason for genetic testing. Decisions about testing are best made with a doctor or genetic counselor, based on your personal health history, symptoms, and family history.
A genetic result is only one part of your health story
Genetic results can provide meaningful insight, but how much they reveal depends on the condition and on the type of variant involved. Many other factors, including lifestyle, environment, age, and medical history, shape how the body functions over time. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is most useful when understood together with other aspects of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, genetic results can also help place individual experiences in perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in a person’s 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, seem less effective for another, or cause more side effects in someone who is more sensitive to it.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect a person’s response to medications. It studies links between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence both how strongly a drug works and how the body handles it. This information can support more informed, individualized treatment decisions. You can learn more about this topic in the LearnHub.
Drugs influenced by the METRNL gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how medicines work, so questions about side effects, treatment changes, or other medication concerns are best discussed with your doctor.
History
In the early 2010s, researchers identified the METRNL gene as a relative of the METRN gene and named it meteorin like. It was first described in biomedical studies exploring signals made by body tissues, and later papers also used names such as subfatin. As medical science evolved, so did understanding of this gene. Over time, descriptions became more precise, and scientists settled on METRNL as the standard gene symbol used in genetics and clinical research. Its history is mainly a story of recent laboratory discovery, careful naming, and steadily growing interest in how this gene fits into human biology.