The TBK1 gene helps your cells manage immune signals and clear damaged material, including in nerve cells. This gene plays an important role in keeping those pathways balanced. If it does not work well, cells may struggle with cleanup and stress control, which can affect brain and nerve health over time. Some inherited variants in the TBK1 gene are linked to amyotrophic lateral sclerosis (ALS) and frontotemporal dementia, and certain variants have also been associated with some forms of glaucoma.
What is a gene?
A gene is a stretch of DNA that carries instructions your cells use to make molecules or manage processes in the body. Some genes hold the directions for producing proteins, which are the working parts of cells. Others mainly help control when certain processes happen, where they happen, and how strongly they run. Taken together, genes affect how the body develops and functions, and they can also shape how you respond to food, stress, or medications. To explore this topic in more detail, you can learn more in the LearnHub.
Overview
TBK1Gene function
What if the gene works
The TBK1 gene helps cells respond to infections and clear damaged material. It supports immune signaling and cell cleanup, which can help protect nerves and other tissues.
Risk
What if the gene does not work
Changes in the TBK1 gene can be linked to amyotrophic lateral sclerosis (ALS), frontotemporal dementia, and some cases of normal-tension glaucoma. Milder or more severe variants may influence which features appear, when they start, and how much function is affected.
Treatment
What does that mean for your treatment
For a pathogenic or loss-of-function variant in the TBK1 gene, no TBK1-specific treatment or management approach is currently established. The TBK1 gene is being studied as a drug target in cancer and inflammatory research, but this has not changed routine care.
Conditions associated with TBK1
Gene function
What if the gene works
Your cells use the TBK1 gene for early immune warning and routine cleanup. It helps pass along signals when cells sense viruses and supports autophagy, the process cells use to recycle worn out parts. This helps explain how the TBK1 gene works in the body day to day.
The TBK1 gene helps cells react when they detect viral material. It turns on early immune signals, including interferons, which alert nearby cells and support antiviral protection.
This gene passes danger signals from cell sensors to the cell nucleus, where response genes are switched on. That signaling helps coordinate a timely immune response and keeps it organized.
The TBK1 gene also supports autophagy (the cell’s recycling system). It helps cells mark and remove worn out parts and some invading germs, which supports day to day cell balance.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants do not cause any noticeable effect and simply reflect natural genetic variation. In some cases, however, a variant can change how a gene functions more significantly and may contribute to or lead to a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TBK1 gene can affect protein function by reducing how much protein a cell makes, weakening its kinase activity, or disrupting binding to partner proteins. Some changes only partly reduce stability or signaling, while more severe variants can cause loss of function. In people with TBK1-related ALS or frontotemporal dementia, greater functional disruption may be linked to earlier onset or a broader mix of features.
How variants are linked to conditions
Pathogenic variants in the TBK1 gene are best known for causing some cases of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), sometimes in the same person or family. Inherited TBK1 gene variants linked to ALS and frontotemporal dementia are uncommon, but they are a well-established finding in human genetics. Certain extra copies of the TBK1 gene have also been associated with some forms of normal-tension glaucoma.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widely found across the general population. Most do not directly affect health and simply contribute to normal human diversity. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences play a role. In some situations, though, 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 risk related to the TBK1 gene. In families with a disease-causing TBK1 change, risk can vary from one person to another, so personal guidance from a doctor or genetic counselor can help put that risk in context.
Inheritance of TBK1 variants
TBK1-related conditions are usually inherited in an autosomal dominant pattern. This means a person with a disease-causing variant in the TBK1 gene has a 50% chance of passing that variant to each child. Sons and daughters can inherit it equally, and either parent can pass it on. In families asking about TBK1 gene inheritance, it is important to know that inheriting the variant can raise the chance of related illness, but not everyone who inherits it is affected in the same way.
What does my TBK1 result mean for my family?
For disease-causing TBK1 changes linked to ALS or frontotemporal dementia, the pattern is usually dominant, so close relatives such as parents, brothers, sisters, and children may also carry the same change. In practical terms, each child of someone with a disease-causing TBK1 variant has a 1 in 2 chance of inheriting it. Not everyone who inherits a TBK1 variant will develop symptoms, and the age symptoms begin can vary across a family.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for TBK1 variants usually uses a blood or saliva sample, and a lab reads the TBK1 gene to look for DNA changes. It may be done as a single gene test or as part of a broader panel or exome test, and results can show a health linked variant, a benign variant, or a variant of uncertain significance.
When should I consider getting a genetic test?
You may want to discuss TBK1 genetic testing if you or close relatives have ALS or a form of dementia that affects behavior or language, especially if symptoms started younger than expected or several family members are affected. Testing can sometimes help confirm an inherited cause and clarify whether relatives may also carry the variant.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it explains varies depending on the condition and the type of variant involved. Over time, factors such as lifestyle, environment, age, and medical history also affect how the body functions. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best understood alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, genetic results can also 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 genes can change how the body breaks down a drug, moves it through the bloodstream, or responds to it at its target. This helps explain why the same medication may work well for one person, seem less effective for another, or cause more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. By looking at connections between genes and drugs, it helps explain why the same treatment may work differently from one person to another. For many medicines, genes influence both how strongly a drug works and how the body processes it. This information can support more informed, individualized treatment decisions. More on this topic is available in the LearnHub.
Drugs influenced by the TBK1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or adjusted. Questions about side effects, new symptoms, or how a treatment fits your overall health are best discussed with your doctor.
History
The TBK1 gene entered medical research in the early 2000s, when scientists identified it while studying how cells respond to infection and inflammation. It was named for its link to TANK, a protein already under investigation in immune signaling. From these first observations, research expanded steadily. Over time, the TBK1 gene drew broader attention when inherited variants were linked to amyotrophic lateral sclerosis, frontotemporal dementia, and some forms of glaucoma. These discoveries made the TBK1 gene an important part of modern neurogenetics and helped connect immune pathway research with studies of brain and eye conditions.