The ERFE gene provides instructions for erythroferrone, a hormone made by developing red blood cells that signals the liver to make more iron available when the body needs to build blood. If this gene does not work well, iron may be less available for red blood cell production, which can contribute to anemia or upset normal iron balance. In medicine, this gene is important because it helps connect blood making with iron control.
What is a gene?
Genes are stretches of DNA that hold instructions cells use to make molecules or guide activities in the body. Some genes provide the code for proteins, which do much of the cell’s work. Others are used mainly to regulate when a process happens, where it happens, and how active it is. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, or medicines. For a deeper look at this topic, visit the LearnHub.
Overview
ERFEGene function
What if the gene works
The ERFE gene helps your body match iron supply to red blood cell production. It sends a signal that lowers the body's iron brake, so more iron is available when new red blood cells are needed.
Risk
What if the gene does not work
When the ERFE gene works less well, red blood cell precursors may send a weaker signal that normally lowers hepcidin, the hormone controlling iron flow. Milder to more severe variants can reduce this signaling to different degrees.
Treatment
What does that mean for your treatment
No treatment or drug choice approach specific to the ERFE gene is currently established for people with pathogenic variants in the ERFE gene. ERFE is being studied as a biomarker and possible treatment target in conditions that affect iron balance and some anemias.
Gene function
What if the gene works
Your body uses the ERFE gene as part of the system that matches iron supply to red blood cell production. It is most active in developing red blood cells in the bone marrow. Understanding how the ERFE gene works can make it easier to see how iron balance stays aligned with your body’s need to make healthy blood cells.
The ERFE gene helps bone marrow tell the liver when more iron is needed for making red blood cells. This keeps iron supply matched to the body’s normal blood building needs.
Its protein lowers hepcidin (a liver signal that limits iron in the blood). That allows stored iron to be released and more iron to be absorbed from food when demand rises.
ERFE becomes more active when your body is boosting red blood cell production, such as after blood loss. This supports hemoglobin production and helps new red blood cells mature.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, including variation 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. At times, 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
Changes in the ERFE gene can make the erythroferrone protein less stable, harder for cells to release, or less able to bind its usual targets. In practice, this is how variants influence the ERFE gene's function at a cellular level. Some variants may only partly reduce protein activity, while more disruptive variants can leave little or no working protein. This spectrum can change how strongly ERFE-related signaling is reduced.
How variants are linked to conditions
The ERFE gene does not yet have a broadly confirmed link to a specific health condition, although research on how ERFE gene variants are linked to conditions is still evolving. Anyone with a confirmed ERFE-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information.
A variant is not necessarily a diagnosis
Variants are a usual feature of human biology and are widely found across the general population. Most do not directly affect health and instead represent part of normal human variation. For many genes, having a variant associated with a condition suggests a possible link rather than providing a definitive diagnosis, particularly when several genes and environmental influences play a role. Still, in certain situations, one 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 risks related to the ERFE gene. Anyone with concerns about personal or family risk can talk with a doctor or genetic counselor.
Inheritance of ERFE variants
There is not yet a broadly confirmed Mendelian pattern for how ERFE gene variants are inherited in relation to a specific human condition, so the answer to how ERFE gene variants are inherited remains limited to general inheritance rather than a single disease based rule. The ERFE gene is on chromosome 2, which is an autosome. That means you inherit one copy of the ERFE gene from your mother and one copy from your father.
What does my ERFE result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific, recognized condition for ERFE, though this can change as research develops. If you have a specific ERFE result and want to understand what it could mean for close relatives, a doctor or genetic counselor can explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
ERFE genetic testing usually uses a blood or saliva sample, which a lab analyzes by sequencing the ERFE gene to look for variants. Results may show no variant, a known clinically relevant variant, or a variant of uncertain significance, which means the change is not yet clearly understood.
When should I consider getting a genetic test?
There is not yet a broadly established, ERFE-specific clinical reason for genetic testing. Decisions about testing are best made with a doctor or genetic counselor, based on your symptoms, iron levels, and family history.
A genetic result is only one part of your health story
A genetic result can be very informative, but what it can tell you varies depending on the condition and the kind of variant involved. Factors such as age, lifestyle, environment, and medical history also affect how your body works over time. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is best considered alongside other parts of care. In other situations, a genetic result may give a clear answer. In areas like medication response, it 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. This helps explain why the same treatment works well for one person, causes more side effects in another, or seems to have less effect in someone else. Differences in how the body absorbs, breaks down, transports, or responds to a drug are common, and they can influence both benefit and sensitivity to treatment.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect a person’s response to medications. It looks at 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 information can support treatment decisions that are both more informed and more individualized. If you want to explore this subject further, you can learn more in the LearnHub.
Drugs influenced by the ERFE gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines, so questions about treatments, side effects, or supplements are best discussed with your doctor or pharmacist. Seek medical advice if a medicine causes new symptoms, is not helping as expected, or if you have ongoing concerns about anemia or iron levels.
History
The ERFE gene entered the medical literature relatively recently, as scientists worked to understand how the body links red blood cell production with iron balance. In recent decades, awareness of this gene’s role has grown. A major step came in 2014, when researchers identified erythroferrone as a signal made by developing red blood cells and connected it to longstanding questions in blood and iron research. From these first observations, research expanded steadily. Since then, ERFE has become part of modern studies on anemia, iron overload, and inherited blood conditions, marking it as a newer but important chapter in the history of hematology and genetics.