The RETREG1 gene helps nerve cells recycle and remove worn out parts of the endoplasmic reticulum, an internal cell network that makes and moves proteins. If this gene does not work properly, sensory nerves can become damaged over time. People with severe RETREG1 variants may develop a rare inherited nerve condition with reduced feeling of pain, heat, or injuries, often affecting the feet and hands. This can lead to unnoticed wounds, burns, infections, and problems with walking.
What is a gene?
Genes are sections of DNA that hold instructions your cells use to make molecules or regulate processes in the body. Some genes carry the information needed to produce proteins, which are the parts of cells that do much of the work. Others mainly help direct when certain processes happen, where they take place, and how strongly they operate. Together, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. To look into this topic in more detail, you can find more in the LearnHub.
Overview
RETREG1Gene function
What if the gene works
The RETREG1 gene helps cells recycle worn out parts of the endoplasmic reticulum, the cell structure that makes and processes proteins. This cleanup supports healthy nerve cells and helps cells manage everyday stress.
Risk
What if the gene does not work
More disruptive variants in the RETREG1 gene can cause childhood onset sensory neuropathy with reduced pain and temperature sensation, ulcers, unnoticed injuries, and weakness or wasting in the hands and feet. Milder variants may cause later or less severe symptoms.
Treatment
What does that mean for your treatment
No treatment or management approach is currently established specifically for pathogenic variants in the RETREG1 gene. Care is based on a person’s symptoms, while the RETREG1 gene is mainly being studied in early research on nerve cell stress and cell cleanup pathways rather than as a guide for current drug choices.
Conditions associated with RETREG1
Gene function
What if the gene works
Inside your cells, the RETREG1 gene helps manage the endoplasmic reticulum, a membrane network that folds and moves proteins. A core part of RETREG1 gene function is routine cleanup, so older or extra parts of this network can be broken down and replaced. This steady turnover helps cells stay balanced during everyday work.
The RETREG1 gene helps cells recycle worn or extra pieces of the endoplasmic reticulum through autophagy (the cell’s cleanup system). This keeps the protein handling network orderly and ready for daily use.
Its protein sits in the endoplasmic reticulum membrane and helps bend small sections so they can be removed. This supports the normal size and layout of this network inside the cell.
By refreshing this membrane system, the RETREG1 gene supports healthy protein processing and transport inside cells. It helps the cell renew parts of the network that are no longer needed.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help shape normal human diversity, such as variation in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not cause any noticeable effect and are simply part of natural genetic variation. Sometimes, 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 RETREG1 gene often weaken or remove the RETREG1 protein, making it unstable, shortened, or less able to attach to cell membranes and clear damaged parts of the endoplasmic reticulum (the cell’s protein making network). This is how RETREG1 gene variants affect protein function. Milder variants may leave some activity, while more disruptive variants can cause a larger loss of function. In people with RETREG1 linked sensory neuropathy, that can match earlier onset and wider nerve involvement.
How variants are linked to conditions
Pathogenic variants in the RETREG1 gene cause hereditary sensory and autonomic neuropathy type 2B, a rare inherited condition; many people look for this as RETREG1 gene variants linked to hereditary sensory and autonomic neuropathy type 2B. It usually starts in childhood and can lead to reduced pain sensation, repeated injuries, skin ulcers, and infections that may go unnoticed. This diagnosis is typically confirmed when a person inherits a disease-causing variant from both parents.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widely present in the general population. Most have no direct impact on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a certain diagnosis, especially when several genes and environmental factors are involved. In some situations, however, a single well-characterized variant in a specific gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For RETREG1, risk is mostly shaped by family history and whether someone inherits disease-causing changes in both copies of the gene. There is not yet broadly confirmed evidence that specific lifestyle or environmental factors clearly increase or lower the chance of developing a RETREG1-related condition.
Inheritance of RETREG1 variants
RETREG1-related conditions are inherited in an autosomal recessive pattern. This means a child usually inherits one RETREG1 gene variant from each parent, and both parents are typically healthy carriers. When both parents carry a variant, each pregnancy has a 25% chance of an affected child, a 50% chance of a child who is also a carrier, and a 25% chance of a child with no inherited variant. In practical terms, how RETREG1 variants are inherited usually becomes clear only when both sides of the family pass down the same condition-linked gene change.
What does my RETREG1 result mean for my family?
For families with a disease-causing RETREG1 result, the pattern is usually recessive, which means brothers and sisters may also be affected or may be healthy carriers. Parents are often carriers even if they have no symptoms. Children of someone with RETREG1-related disease will usually be carriers, and their chance of being affected depends on the other parent’s gene result.
Genetic information
Genetic testing
How you find out about variants
To look for changes linked to inherited nerve symptoms, genetic testing for RETREG1 variants uses a blood or saliva sample to read the RETREG1 gene. Results may show a disease-causing variant, a benign variant, or a variant of uncertain significance, which means the lab cannot yet tell whether it affects health.
When should I consider getting a genetic test?
Genetic testing for the RETREG1 gene may be worth considering when someone has very reduced pain feeling, repeated unnoticed injuries or burns, long-lasting foot sores, or numbness that started early in life. It can also help when these problems run in a family or when doctors suspect an inherited nerve condition.
A genetic result is only one part of your health story
Genetic results can be informative, but how much they explain depends on the condition and the specific variant involved. Over time, factors such as lifestyle, environment, age, and medical history also shape how the body works. In some conditions, especially those influenced by many genes, genetic information offers 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 also help make sense of individual experiences.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in genes can change how the body breaks down a drug, moves it through the blood, or responds at the target tissue. This helps explain why the same medicine may work well for one person, have less effect in another, or cause more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines the way genetic differences affect how people respond to medications. By studying links between genes and drugs, it helps explain why the same treatment can have different effects from one person to another. For many medicines, genes influence either how powerfully a drug works or how the body handles it. This information can support treatment choices that are more informed and more tailored to the individual. More detail on this topic is available in the LearnHub.
Drugs influenced by the RETREG1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how medicines will work or which side effects may happen, so any concerns about symptoms, treatment, or medications are best discussed with your doctor.
History
The RETREG1 gene entered the medical literature through studies of families with an inherited nerve condition causing reduced pain sensation and repeated injuries. Initially understood only through visible traits, later recognized as tied to a specific gene, it was first reported under the older name FAM134B. In 2010, researchers linked changes in this gene to hereditary sensory and autonomic neuropathy type IIB, helping explain a condition that had long been recognized clinically. From these first observations, research expanded steadily, and the gene was later renamed RETREG1 as its cellular role became clearer. This shift in naming reflects how genetic research often starts with family patterns and becomes more precise over time.