The NDRG1 gene helps support healthy peripheral nerves, especially the cells that maintain myelin, the protective covering around nerves. If this gene does not work properly, nerve signals can become less reliable, which may lead to gradually increasing weakness, numbness, balance problems, and sometimes hearing loss. Pathogenic variants in the NDRG1 gene are linked to an inherited nerve condition called Charcot-Marie-Tooth disease type 4D. NDRG1 is better known in medical genetics than in popular culture.
What is a gene?
A gene is a stretch of DNA that carries instructions cells use to make molecules or regulate processes in the body. Some genes provide the directions for making proteins, which are the working parts of cells. Others mainly guide when certain processes happen, where they take place, and how active they are. 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, you can find more in the LearnHub.
Overview
NDRG1Gene function
What if the gene works
The NDRG1 gene helps cells that support nerves maintain myelin, the fatty covering that insulates nerves. It also supports normal cell growth and how cells respond to stress.
Risk
What if the gene does not work
When the NDRG1 gene does not work properly, it most often causes an inherited peripheral nerve condition with weakness, numbness, and walking difficulty. Some people also have hearing loss. Milder or more severe variants can affect onset and symptom severity.
Treatment
What does that mean for your treatment
For people with pathogenic variants in the NDRG1 gene, no gene-specific treatment or drug choice is currently established. Management is supportive and guided by symptoms rather than the NDRG1 variant itself. The NDRG1 gene is also being studied as a cancer biomarker and possible drug target in some tumors.
Conditions associated with NDRG1
Gene function
What if the gene works
Cells need steady systems for growth, transport, and upkeep. Your cells rely on the NDRG1 gene to support everyday organization as they mature. It is especially active in cells that help protect peripheral nerves. That helps explain what the NDRG1 gene does in the body each day.
The NDRG1 gene helps cells slow growth at the right time and settle into specialized roles. This supports normal cell maturity and helps tissues keep an orderly structure.
Inside your cells, the NDRG1 gene helps move certain proteins between internal compartments and the cell surface. This recycling keeps key proteins in the right place so cells can communicate and respond normally.
The NDRG1 gene supports how cells handle fats, which are important building blocks of cell membranes. This helps cells maintain their outer barrier and carry out routine tasks smoothly.
In Schwann cells, which wrap peripheral nerves, the NDRG1 gene helps maintain the myelin covering around nerve fibers. This helps nerve signals travel smoothly between the spinal cord, muscles, hands, and feet.
What is a variant?
A genetic variant is a slight difference in the DNA sequence within a gene. Variants are common and help explain normal differences among people, such as appearance, metabolism, or the way the body reacts to environmental influences. Many do not cause any noticeable change and are part of natural genetic variation. Sometimes, though, a variant can change how a gene works enough to contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the NDRG1 gene can change the protein's shape, make it unstable, or stop it from being made at all. This is how variants influence the NDRG1 gene's function: milder variants may leave some activity, while more severe variants often cause little or no working protein. In people with two nonworking copies, greater loss of function is linked to earlier and more pronounced inherited nerve disease.
How variants are linked to conditions
Pathogenic variants in the NDRG1 gene cause Charcot-Marie-Tooth disease type 4D, also called hereditary motor and sensory neuropathy-Lom, a rare inherited nerve condition. People with this diagnosis often develop weakness, numbness, and walking difficulty in childhood or the teen years, and some later have hearing loss. Finding disease-causing variants in both copies of the NDRG1 gene can confirm the diagnosis.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are common throughout the general population. Most do not have a direct effect on health and instead represent natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when more than one gene and environmental factors are involved. In some situations, though, a single well characterized variant in a particular gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For NDRG1-related nerve conditions, risk is mainly set by the gene changes inherited from your parents. It is higher when both biological parents carry a harmful NDRG1 variant, especially in families or communities where the same variant is more common. There is not enough evidence that lifestyle changes alter the chance of having the condition.
Inheritance of NDRG1 variants
NDRG1-related conditions are inherited in an autosomal recessive pattern. This means a child usually inherits one NDRG1 gene variant from each parent, and the parents are often healthy carriers. When both parents carry a variant, each pregnancy has a 25% chance of the child inheriting both variants, a 50% chance of being a carrier, and a 25% chance of inheriting neither variant. Because this is how variants of the NDRG1 gene are inherited on a non-sex chromosome, the pattern is the same for boys and girls.
What does my NDRG1 result mean for my family?
For NDRG1-related nerve conditions, the pattern in families is usually recessive, which means brothers and sisters may also have the condition or be carriers even if they feel well. Parents are often healthy carriers. Children of someone with an NDRG1-related condition will usually be carriers, and the chance of having an affected child depends on whether the other parent also carries an NDRG1 change.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for NDRG1 variants uses a blood or saliva sample to read the NDRG1 gene and look for DNA changes. This can be done as single gene testing or as part of a broader inherited neuropathy panel. Results may show no variant, a benign variant, or a variant linked to disease.
When should I consider getting a genetic test?
Consider testing the NDRG1 gene if you or your child has a family history of an inherited nerve condition or has ongoing foot and leg weakness, numbness, trouble walking, or hearing loss that suggests this condition. Testing can also be helpful when close relatives are known to carry an NDRG1 variant.
A genetic result is only one part of your health story
Genetic findings can be informative, yet how much they reveal varies by the condition and the specific type of variant. Over time, how the body works is also shaped by factors such as lifestyle, environment, age, and medical history. 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, genetic results can help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, moves it into tissues, or responds to its effects. This helps explain why the same treatment works well for one person, seems weaker in another, or causes more side effects in someone else. These differences are common and are one reason medication response is often individual.
What is Pharmacogenetics?
Pharmacogenetics looks at how genetic differences can shape the way a person responds to medication. It studies links between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes can affect both how strongly a drug works and how the body processes it. This information can help support more informed, individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the NDRG1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding everyday medication choices, so concerns about side effects, treatment response, or new symptoms are best discussed with your doctor. NDRG1 has been studied in cancer research for possible links to how some tumors respond to treatment, but this has not become routine medication guidance for patients.
History
The NDRG1 gene entered medical genetics in the 1990s, when researchers identified it as a gene whose activity could change in relation to cell growth signals. It was first described under the name “N-myc downstream regulated gene 1,” reflecting how scientists understood it at the time. From these first observations, research expanded steadily. A major milestone came when variants in the NDRG1 gene were linked to an inherited nerve condition now known as Charcot-Marie-Tooth disease type 4D, especially in some Roma communities where the condition had been recognized for generations. That discovery helped connect long-observed family patterns with a specific genetic cause. Over time, scientists refined the picture and placed the NDRG1 gene within the broader history of inherited neuropathies.