The NGF gene gives the body instructions for nerve growth factor, a protein that helps certain nerve cells grow, survive, and send pain signals. If this gene does not work properly, some people have a much lower ability to feel pain and temperature, which can lead to repeated injuries, burns, and joint damage. This gene plays an important role in the nerves that help control sweating and other automatic body functions. Some NGF variants are also being studied for links to pain conditions and brain health.
What is a gene?
Genes are stretches of DNA that carry instructions cells use to make molecules or regulate activities in the body. Some genes provide the code for proteins, which are the functional parts of cells. Others mainly help determine when certain processes happen, where they take place, and how strongly they run. Taken together, genes affect how the body develops and works, and they can shape how you respond to food, stress, or medications. For a closer look at this topic, you can learn more in the LearnHub.
Overview
NGFGene function
What if the gene works
The NGF gene helps make nerve growth factor, a protein that supports the growth and survival of certain nerve cells. It also helps pain sensing nerves and body functions like heart rate and sweating work normally.
Risk
What if the gene does not work
Variants in the NGF gene can cause reduced pain sensation or inability to feel pain, often with unnoticed injuries and sometimes reduced sweating. Milder and more severe variants may differ in how early these features appear and how pronounced they are.
Treatment
What does that mean for your treatment
No NGF-specific treatment or management approach is currently established for people with a pathogenic variant in the NGF gene. Care is based on a person’s symptoms, while NGF signaling is also being studied as a drug target in pain medicine and nerve repair.
Conditions associated with NGF
Gene function
What if the gene works
The NGF gene helps your body make a protein that supports certain nerve cells from early development through adult life. It is especially important for sensory nerves and sympathetic nerves, which help with feeling and automatic body functions like sweating and heart rate. When this gene is active, nerve cells can grow, connect, and stay healthy over time.
The NGF gene helps certain immature nerve cells grow into fully working cells. This is especially important for sensory nerves and sympathetic nerves, which support feeling and automatic body functions.
Its protein delivers key survival signals to selected nerve cells. These signals help those cells keep their structure, use energy well, and continue routine communication over time.
NGF helps nerve fibers extend and branch so they can reach the right tissues. This supports stable links between nerves and the body areas they serve.
By helping sensory nerves mature, the NGF gene supports how your body detects touch, temperature, and pain. This is part of how nerve signals from the skin and other tissues reach the brain.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These differences are common and help create normal human diversity, such as variation in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some cases, though, a variant can change how a gene functions more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the NGF gene can alter how the nerve growth factor protein is made, folded, processed, or released, and some variants also weaken receptor binding. In practical terms, this is how NGF gene variants affect nerve growth factor activity: milder variants may leave partial signaling, while more severe variants can sharply reduce or disrupt it. When loss of function is greater, pain sensing problems often appear earlier and can be more pronounced.
How variants are linked to conditions
Pathogenic variants in the NGF gene cause a rare inherited condition marked by congenital insensitivity to pain, called hereditary sensory and autonomic neuropathy type V. People with this diagnosis may not feel pain normally, so cuts, burns, fractures, and joint injuries can go unnoticed. Some also have reduced sweating or trouble sensing heat. This NGF gene and congenital insensitivity to pain association is the main well-established clinical link.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widely found in the general population. Most do not have a direct effect on health and simply reflect natural 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, though, 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 NGF, personal risk is usually shaped much more by whether a disease-causing variant is present in the family than by everyday lifestyle factors. There is not yet broadly confirmed evidence that specific habits or exposures clearly increase or reduce risk related to NGF. Anyone worried about their personal or family risk should speak with a doctor or genetic counselor.
Inheritance of NGF variants
For families asking how NGF gene variants are inherited, the well-established pattern is autosomal recessive for NGF-related inherited pain-sensing neuropathy. This means a person usually inherits one altered copy of the NGF gene from each parent. When both parents carry one 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. Parents who carry one variant usually do not have the condition themselves.
What does my NGF result mean for my family?
For NGF, the best-known inherited condition is passed down in a recessive pattern. This usually means parents are healthy carriers, and brothers or sisters may also be carriers or, less often, have the condition if they inherited the changed gene from both parents. Other close relatives may also carry the same NGF change, so the result can matter beyond one person.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the NGF gene, clinicians use genetic testing on a blood sample or saliva. This NGF gene test reads the DNA code and compares it with the usual sequence to identify changes that may help explain symptoms or confirm a diagnosis.
When should I consider getting a genetic test?
Genetic testing for the NGF gene may be worth considering when a child or adult has a strikingly reduced ability to feel pain, repeated painless injuries, or a family history of this kind of inherited nerve condition. It can also help clarify whether close relatives carry the same change.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, but how much it reveals varies based on the condition and the type of variant present. Many factors, including age, environment, lifestyle, and medical history, influence how the body works over time. For some conditions, especially those shaped by many genes, genetic information provides context rather than certainty and is best considered alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, these results can help place personal experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. This helps explain why the same treatment works well for one person, seems weaker for another, or causes more side effects in someone else. Part of the difference comes from how each body breaks down, moves, or responds to a drug, and these inherited differences are common.
What is Pharmacogenetics?
Pharmacogenetics examines how inherited genetic differences can affect a person’s response to medications. It studies the relationship between genes and drugs to better explain why the same treatment may work differently from one person to another. For many medicines, genes can influence how strongly a drug works or how the body handles it. This information can help support treatment decisions that are more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the NGF gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response. For concerns about side effects, new symptoms, or changes to treatment, speak with your doctor or pharmacist.
History
The history of the NGF gene is closely tied to one of the landmark discoveries in modern biology. In the 1950s, Rita Levi-Montalcini and Stanley Cohen identified nerve growth factor, a finding that changed how scientists understood the growth and survival of nerve cells. Their work later earned the Nobel Prize in Physiology or Medicine in 1986 and helped bring broad attention to the biology behind the NGF gene. From these first observations, research expanded steadily. As gene mapping and DNA studies advanced in the following decades, scientists identified the NGF gene itself and connected it to inherited conditions affecting pain sensation and the nervous system. This history made the NGF gene an important part of both neuroscience and human genetics.