The STING1 gene helps the immune system sense DNA from viruses and other threats and switch on early defense signals. This gene plays an important role in controlling inflammation, so if it does not work well, the body may have a weaker response to some infections. A few variants make it too active instead, which can lead to ongoing inflammation with fevers, skin problems, and lung disease.
What is a gene?
A gene is a stretch of DNA that gives your cells instructions to make molecules or direct processes in the body. Some genes carry the information needed to produce proteins, the parts of cells that do much of the work. Other genes mainly regulate when certain processes happen, where they take place, and how strongly they run. Together, genes influence how the body develops and functions, and they can shape how you respond to food, stress, or medications. For a more in depth look at this topic, you can read more in the LearnHub.
Overview
STING1Gene function
What if the gene works
The STING1 gene helps cells sense DNA in the wrong place, which can signal infection or cell stress. It helps switch on early immune signals that guide the body’s first defense.
Risk
What if the gene does not work
Variants in the STING1 gene can cause too much immune signaling, leading to early inflammation that may affect the skin, blood vessels, and lungs. Milder and more severe variants can change when symptoms begin and how strongly they appear.
Treatment
What does that mean for your treatment
No STING1-specific treatment or drug choice is currently established in routine clinical guidelines. For people with STING1-related inflammatory illness, specialists may use broader immune-calming medicines such as JAK inhibitors, but this is not a fully established gene-specific standard. The STING1 gene is also an active drug target in research, and STING-blocking treatments are under study.
Conditions associated with STING1
Gene function
What if the gene works
In many cells, the STING1 gene supports the body’s early warning system against infection. It helps cells react when DNA shows up in the wrong place, which can signal a virus or another threat. This is part of how your body senses viral DNA and starts an immune response.
The STING1 gene helps cells react when DNA appears in the wrong place inside the cell, away from the nucleus. Its protein receives alarm signals made after that DNA is detected and relays the message onward.
STING1 switches on interferons (proteins that warn nearby cells about infection) and other early defense genes. This helps your body build a rapid antiviral response before the broader immune system fully joins in.
The STING1 signal also turns on other chemical messengers that guide inflammation and help call immune cells into action. This supports an organized first response while your body assesses and contains a threat.
What is a variant?
A genetic variant is a slight change in the DNA sequence of a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. Sometimes, 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
Most disease-causing variants in the STING1 gene are gain-of-function changes, which explains how STING1 variants affect immune signaling: the protein becomes active too easily and keeps sending inflammation signals even without infection. These changes often alter the protein's shape or how it pairs with itself, making the signal harder to switch off. Milder activating variants may cause less excess signaling, while stronger ones are often linked to earlier or more severe SAVI features.
How variants are linked to conditions
Pathogenic variants in the STING1 gene cause STING-associated vasculopathy with onset in infancy, often called SAVI, a rare inherited inflammatory condition affecting the skin, blood vessels, lungs, and sometimes joints. In daily life, people may develop painful finger or toe sores, cough, shortness of breath, or poor growth from early childhood. Among conditions linked to STING1 gene variants, SAVI is the main diagnosis supported by broad medical consensus.
A variant is not necessarily a diagnosis
Human biology naturally includes genetic variants, and they are common across the population. Most do not directly affect health and simply reflect normal human diversity. For many genes, 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 part. 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?
For STING1-related illness, risk is mainly driven by having a disease-causing change in the STING1 gene, whether inherited or new in the family. There is not enough evidence to say lifestyle changes lower the chance of developing it, but avoiding smoking and reducing cold exposure may help limit lung and blood vessel problems in some people already living with the condition.
Inheritance of STING1 variants
For the main known STING1-related condition, variants in the STING1 gene are inherited in an autosomal dominant pattern. This means one altered copy from either parent can be enough to cause the condition, so each child of an affected parent has a 50% chance of inheriting it. In families asking how STING1 variants are inherited, it is also important to know that some cases happen because of a new (de novo) variant, which starts in the child and is not inherited from either parent.
What does my STING1 result mean for my family?
A disease-causing STING1 result linked to STING-associated inflammation is usually passed in a dominant way, so close relatives such as a parent, brother, sister, or child may also carry the same change and may want to discuss testing. In many families, each child of someone who carries the change has a 1 in 2, or 50%, chance of inheriting it. Some cases happen for the first time in one person, so a parent may not carry it.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the STING1 gene, doctors use genetic testing on a blood sample, saliva, or a cheek swab. STING1 genetic testing reads the gene’s DNA code and checks for variants linked to inherited inflammatory conditions. Results may show a known disease-causing variant, no relevant variant, or a variant of uncertain significance.
When should I consider getting a genetic test?
Genetic testing for the STING1 gene can be worth considering when someone has signs of a rare inherited inflammation condition, especially severe skin sores, repeated fevers, or ongoing lung inflammation that starts in infancy or childhood. It can also help when these problems run in the family.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it explains depends on the condition and the kind of variant involved. How the body functions over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is best considered together with other parts of care. In other situations, a genetic result may offer a clear answer. In areas such as medication response, genetic results can also help put a person’s 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, do little for another, or cause more side effects in someone who is more sensitive to it. These differences are common and are one of several reasons treatment response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way a person responds to medication. It studies connections between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medications, genes influence both how strongly a drug works and how the body processes it. This information can support treatment choices that are more informed and more individualized. More detailed information on this topic is available in the LearnHub.
Drugs influenced by the STING1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding routine medication choices, so questions about medicines, side effects, or treatment changes are best discussed with your doctor. STING1 is being studied in research on immune-targeting treatments, including some cancer therapies and drugs aimed at the STING pathway, but this has not become routine prescribing guidance.
History
The STING1 gene entered medical research in the late 2000s, when scientists studying the body’s early defense system identified a new signaling pathway. Initially understood only through visible traits, later recognized as tied to a specific gene, this work quickly became important in immunology research. Building on this early work, scientists uncovered more about the STING1 gene in infection, inflammation, and rare inherited inflammatory conditions. A major step came when specific STING1 variants were linked to SAVI, a rare condition with inflammation in the lungs, skin, and blood vessels. That discovery connected laboratory findings to patient care. Since then, STING1 has remained a focus in research on immunity, inflammation, and cancer treatment.