The VANGL1 gene helps guide how cells line up and move during early development, especially when the brain and spinal cord are forming. This gene plays an important role in helping the neural tube close properly. Some variants in the VANGL1 gene are linked to a higher chance of neural tube defects, including spina bifida, although effects can vary from person to person.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or regulate processes in the body. Some genes provide the instructions for making proteins, the parts of cells that do much of the work. Others mainly help control when certain processes happen, where they happen, and how strongly they run. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. To explore this topic in more detail, you can learn more in the LearnHub.
Overview
VANGL1Gene function
What if the gene works
The VANGL1 gene helps cells line up and communicate during early development. This helps support tissue shape and coordinated cell movement, including normal closure of the neural tube, which forms the brain and spinal cord.
Risk
What if the gene does not work
Certain variants in the VANGL1 gene are linked to a higher chance of neural tube defects, such as spina bifida, and effects can range from mild to more severe, with different features in different people.
Treatment
What does that mean for your treatment
No treatment or management approach is currently established specifically for pathogenic variants in the VANGL1 gene. The VANGL1 gene is being studied in early development and as a possible biomarker in some cancers, but this has not led to guideline-based drug choices.
Conditions associated with VANGL1
Gene function
What if the gene works
The VANGL1 gene helps cells line up, face the right direction, and move in a coordinated way as tissues form. This matters most during early development, when many cells need shared direction cues. In your body, the VANGL1 gene supports processes that shape growing tissues in an orderly pattern.
VANGL1 helps neighboring cells align in the same direction across a sheet of tissue. This shared orientation lets tissues build organized shapes instead of a random pattern.
Its protein sits at the cell surface and passes along directional signals between nearby cells. These signals help groups of cells bend, stretch, and arrange themselves as organs and body structures take shape.
VANGL1 supports the controlled cell movements that are needed during early development. This is part of how the VANGL1 gene helps cells line up during development and reach the right place at the right time.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. Sometimes, however, a variant can change gene function more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the VANGL1 gene can change the shape of its protein, how stable it is, and whether it reaches the cell surface to pass along cell orientation signals. This helps explain how VANGL1 gene variants affect protein function: milder variants may only weaken binding to partner proteins, while more severe variants can leave the protein misfolded, trapped inside the cell, or unusually short with little activity. These effects can vary from one variant to another.
How variants are linked to conditions
Variants in the VANGL1 gene are linked with a higher chance of neural tube defects, a group of birth conditions that includes spina bifida and, less often, anencephaly. In families affected by VANGL1 gene variants and neural tube defects, these changes appear to act as risk factors rather than a certain cause, and not everyone who carries one is affected. Research has also described VANGL1 changes in some people with caudal regression spectrum, but this link is less established.
A variant is not necessarily a diagnosis
Variants in genes are a normal feature of human biology and are widely seen across the general population. Most do not directly affect health and simply reflect natural differences among people. For many genes, having a variant connected with a condition points to a possible association, not a certain diagnosis, especially when several genes and environmental influences play a role. In some situations, though, one well-described variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
Changes in the VANGL1 gene have been linked to a higher chance of certain birth differences affecting the spine and brain, but risk is shaped by many factors, not this gene alone. Family history and low folate before and early in pregnancy can matter, while the exact effect of a VANGL1 change can vary from one family to another.
Inheritance of VANGL1 variants
There is not yet a broadly confirmed single-gene inheritance pattern for disease tied to the VANGL1 gene, because changes in this gene are most often discussed as part of a more complex risk picture rather than a clear-cut inherited condition. In practical terms, inheritance of VANGL1 gene variants does not follow one well-established pattern such as autosomal dominant or autosomal recessive for a specific VANGL1-related syndrome. The VANGL1 gene is located on chromosome 1, which is an autosome, so you inherit one copy from each parent.
What does my VANGL1 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific VANGL1-related condition. Changes in VANGL1 have been linked with some birth differences in research studies, but what a result means for relatives is not always clear and can vary from family to family. If you have a specific VANGL1 result, a doctor or genetic counselor can help explain what it may mean for your family.
Genetic information
Genetic testing
How you find out about variants
VANGL1 genetic testing looks for changes in the VANGL1 gene using blood, saliva, or a cheek swab. A lab reads the DNA sequence to identify variants and classifies them as linked to a condition, uncertain, or likely benign. Results can confirm whether a variant is present but cannot fully predict symptoms.
When should I consider getting a genetic test?
There isn’t yet a broadly established VANGL1-specific reason for genetic testing in routine care. Testing decisions are usually based on a child’s or family’s history of birth conditions affecting the spine or brain and are best discussed with a doctor or genetic counselor.
A genetic result is only one part of your health story
Genetic results can provide valuable insight, but how much they reveal depends on the condition and on the type of variant involved. Many other factors also shape how the body works over time, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is most useful when considered alongside other parts of care. In other situations, a genetic result can 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 genes can change how the body breaks down, transports, or responds to a treatment, so the same medication may work better for one person than another. This is common and can influence both benefit and the chance of side effects or extra sensitivity.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies relationships between genes and drugs to better explain why the same treatment can work differently from one person to another. For many medicines, genes help influence both how strongly a drug works and how the body processes it. This information can support more informed and more individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the VANGL1 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 used, so questions about side effects, treatment changes, or your overall health are best discussed with your doctor.
History
VANGL1 entered human genetics through earlier work in fruit flies, where a related gene called Van Gogh helped scientists map the planar cell polarity pathway, a major step in understanding how cells align during development. In the early 2000s, researchers identified the human VANGL1 gene as part of that same pathway. Building on this early work, scientists began studying whether rare VANGL1 variants might contribute to neural tube conditions such as spina bifida. Reports later linked some VANGL1 changes to families and individuals affected by these conditions, which brought the gene into developmental genetics research. Over time, the way this gene was viewed became more precise, with studies separating rare disease linked variants from the many gene changes that are part of normal human variation.