The TNFRSF1A gene helps control inflammation by making a receptor that lets cells respond to an important immune signal. If this gene does not work properly, inflammation can stay switched on longer than it should. Pathogenic variants in the TNFRSF1A gene can cause TRAPS, an inherited condition with repeated fever episodes, muscle pain, belly pain, rash, and sometimes eye symptoms. Symptoms and severity can vary from person to person.
What is a gene?
Genes are stretches of DNA that carry instructions your cells can use to make molecules or guide processes in the body. Some genes give the directions for producing proteins, the parts of cells that do much of the work. Other genes mainly regulate when and where certain processes happen, and how active those processes are. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, and medicines. For a deeper look at this topic, you can find more in the LearnHub.
Overview
TNFRSF1AGene function
What if the gene works
The TNFRSF1A gene makes a cell surface receptor that responds to tumor necrosis factor, an immune signal. This helps control inflammation and can guide cell survival or cell death when needed.
Risk
What if the gene does not work
Variants in the TNFRSF1A gene can cause TRAPS, with repeated fevers, muscle or belly pain, rash, and joint pain. Milder and more severe variants can affect age at onset, flare pattern, and the chance of amyloidosis.
Treatment
What does that mean for your treatment
For people with pathogenic variants in the TNFRSF1A gene, treatment often centers on blocking IL-1, most often with anakinra or canakinumab, because this approach can control attacks and reduce ongoing inflammation. Etanercept may help some people, while monoclonal TNF blockers such as infliximab can worsen symptoms and are usually avoided.
Conditions associated with TNFRSF1A
Gene function
What if the gene works
Many cells use the TNFRSF1A gene to receive one of the body’s key inflammation signals. Its protein sits on the cell surface and acts like an antenna for tumor necrosis factor, often called TNF, an immune messenger. This core TNFRSF1A gene function helps the body respond to stress, infection, and normal tissue upkeep.
Its protein sits on the cell surface and binds TNF, an immune messenger. This lets the cell detect outside signals and start an organized response.
After TNF binds, the receptor passes the message into the cell. This helps switch on programs that guide inflammation and cell behavior during immune activity.
TNFRSF1A signaling can help cells make protective responses during stress. That support helps many tissues keep working during everyday immune challenges.
In some settings, this receptor helps start apoptosis (programmed cell death). This controlled process removes cells that are no longer needed and supports tissue balance.
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 variation, including differences in appearance, metabolism, and the way the body reacts 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 strongly and may contribute to, or directly cause, a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TNFRSF1A gene can change how the cell-surface receptor is folded, processed, and cleared, so less of it reaches the right place or it signals in an overly persistent way. This helps explain how TNFRSF1A gene variants affect protein function. Milder variants may cause smaller shifts in receptor behavior, while more disruptive variants can have stronger effects and are often linked to earlier or more pronounced TRAPS features.
How variants are linked to conditions
Pathogenic variants in the TNFRSF1A gene cause tumor necrosis factor receptor associated periodic syndrome, often called TRAPS. This is the main well-established TNFRSF1A gene condition association in human genetics. TRAPS can involve repeated episodes of fever, muscle pain, belly pain, rash, and inflammation around the eyes or joints, although symptoms and severity can vary from person to person.
A variant is not necessarily a diagnosis
Genetic variants are a routine feature of human biology and are widely found in the general population. Most do not have a direct effect on health and instead represent normal human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. In some situations, however, 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?
For TNFRSF1A, the main driver of risk is the specific gene change itself, and some changes are more likely than others to lead to symptoms. In many living with a TNFRSF1A change, flare-ups can be set off by infections, stress, or minor injury. There is not enough evidence to say lifestyle changes lower the underlying genetic risk.
Inheritance of TNFRSF1A variants
TNFRSF1A-related conditions are usually inherited in an autosomal dominant pattern, which means a parent carrying a disease-causing variant in the TNFRSF1A gene can pass it to a child with a 50% chance in each pregnancy. Sons and daughters are affected at the same rate. In some families, a TNFRSF1A gene variant appears for the first time in one person as a new, de novo change, rather than being inherited from either parent.
What does my TNFRSF1A result mean for my family?
A disease-causing change in the TNFRSF1A gene is usually passed in a dominant pattern, so close relatives such as a parent, brother, sister, or child may also carry the same change and may want to discuss testing. In families where the variant is inherited, each child has a 1 in 2, or 50%, chance of inheriting it. Some cases happen for the first time in one person, so a parent is not always the source.
Genetic information
Genetic testing
How you find out about variants
A blood or saliva test can look for variants in the TNFRSF1A gene. TNFRSF1A genetic testing reads the DNA code to check for a pathogenic variant linked to TRAPS. Results may confirm a diagnosis, support it, or show a variant whose meaning is still unclear.
When should I consider getting a genetic test?
Consider testing for changes in the TNFRSF1A gene if you or your child has repeated episodes of unexplained fever, severe muscle pain, stomach pain, rash, or swelling around the eyes, especially if these problems run in the family. A result can help confirm a condition called TRAPS and guide care.
A genetic result is only one part of your health story
Genetic findings can be informative, but how much they reveal varies with the condition being considered and the kind of variant involved. Over time, the body is also shaped by many other factors, including lifestyle, environment, age, and medical history. For some conditions, particularly those influenced 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 can give a clear answer. In areas like medication response, these results may also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Some people break down a drug more slowly or more quickly, while others may be more or less sensitive to its effects. This helps explain why the same treatment can work well for one person but cause fewer benefits or more side effects in another. These differences are common and are one reason medication response is often not the same from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes can affect medication response. It focuses on the relationships between genes and drugs to explain why the same treatment may work differently from one person to another. For many medications, genes can influence both how the body processes a drug and how strong its effects are. This information can support more informed, personalized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the TNFRSF1A gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medicine choices. Questions about symptoms, treatment side effects, or how well a medicine is working are best discussed with your doctor. TNFRSF1A has been studied in research on response to some immune-targeting medicines, but these findings are not used routinely to make treatment decisions.
History
Doctors first recognized families with repeated episodes of fever, abdominal pain, and muscle aches long before the cause was clear. In the late 1990s, researchers linked these inherited patterns to variants in the TNFRSF1A gene, helping define the condition now called TNF receptor associated periodic syndrome, or TRAPS. Early reports often used the older name familial Hibernian fever, reflecting where some affected families were first described. From these first observations, research expanded steadily, and the condition became easier to identify in people from many different backgrounds. This work marked an important step in understanding inherited autoinflammatory conditions, where the immune system can become active even without infection.