The SALL4 gene helps guide early development, especially for the arms, hands, eyes, ears, and kidneys. If it does not work properly, a person can be born with differences such as thumb or forearm changes, limited eye movement, hearing loss, or kidney problems. This gene plays an important role in helping cells follow the body’s early building plan. Pathogenic variants in the SALL4 gene can cause conditions such as Duane-radial ray syndrome.
What is a gene?
A gene is a piece of DNA that carries instructions your cells use to make molecules or regulate processes in the body. Some genes provide the directions for producing proteins, which are the parts of cells that do the work. Others mainly guide when certain processes happen, where they happen, and how active they are. Taken together, genes affect how the body grows and works, and they can also influence how you respond to food, stress, or medications. For a deeper look at this topic, more information is available in the LearnHub.
Overview
SALL4Gene function
What if the gene works
The SALL4 gene helps guide early development before birth. It supports how cells grow, specialize, and form parts of the limbs, eyes, kidneys, and reproductive system.
Risk
What if the gene does not work
Variants in the SALL4 gene can cause Duane-radial ray syndrome, with limited eye movement and thumb or forearm differences; people may also have hearing, kidney, or heart changes. Milder and severe variants can influence which features appear and how strongly.
Treatment
What does that mean for your treatment
For pathogenic variants in the SALL4 gene, no treatment or drug choice specific to the SALL4 gene is currently established. Care is guided by the person’s features and supportive management. In research, the SALL4 gene is being studied as a cancer biomarker and possible drug target in some leukemias and solid tumors.
Conditions associated with SALL4
Gene function
What if the gene works
The SALL4 gene is most active very early in life, when the body is being built from a small group of cells. It helps control which other genes turn on or stay quiet, so cells follow the right plan. Understanding what the SALL4 gene does in early development helps explain how tissues and body structures form in an organized way.
SALL4 helps turn sets of other genes on or off at the right time. This gives growing cells clear instructions as they begin to take on different roles.
During early development, SALL4 helps cells follow the body’s basic layout. It supports the orderly shaping of major structures as tissues begin to form.
SALL4 helps some early cells stay flexible before they mature into specific tissue types. This balance between staying unspecialized and starting to specialize is important for normal development.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help explain normal human diversity, such as variation in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not cause any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change a gene’s function more strongly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SALL4 gene often reduce the amount of usable SALL4 protein or change the parts that bind DNA, which can weaken how the protein controls other genes in developing cells. This is how SALL4 gene variants affect function at a cellular level. Some variants leave partial activity, while more severe variants, especially those that create a shortened protein, can cause a larger loss of function and may be linked to earlier or broader features of SALL4-related conditions.
How variants are linked to conditions
Pathogenic variants in the SALL4 gene cause a group of inherited conditions often called SALL4-related syndrome, including Duane-radial ray syndrome, also known as Okihiro syndrome, and acro-renal-ocular syndrome. The clearest conditions linked to SALL4 gene variants involve eye movement differences, thumb or forearm changes, hearing loss, and sometimes kidney, heart, or anal differences present from birth. Different variants can affect people in different ways, even within the same family.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are commonly found in the general population. Most do not directly affect health and instead reflect normal human diversity. For many genes, having a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when several genes and environmental factors also play a role. In some cases, though, a single well understood variant in a specific gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For SALL4, risk is mainly shaped by whether a disease-causing change in the gene is present and whether it runs in the family. Lifestyle habits do not meaningfully change the chance of having a SALL4-related condition, though the condition can appear for the first time in a child even when neither parent is known to have it.
Inheritance of SALL4 variants
For people reading about how SALL4 variants are inherited, the usual pattern for SALL4-related conditions is autosomal dominant. This means a person with a disease-causing variant in one copy of the SALL4 gene can pass it to a child with a 50% chance in each pregnancy. Some people have a new, de novo variant in the SALL4 gene, which means it was not inherited from either parent. Because the SALL4 gene is on chromosome 20, inheritance is the same for males and females.
What does my SALL4 result mean for my family?
For SALL4, a disease-causing result is usually linked to a dominant pattern, so close relatives like parents, siblings, and children may also carry the same change and may want to discuss testing. In many families, each child of someone with the variant has a 1 in 2 chance of inheriting it. Some SALL4 changes happen for the first time in one person, so a parent is not always the source.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for SALL4 variants usually uses a blood or saliva sample. A lab reads the SALL4 gene’s DNA code and looks for changes that may help explain features present from birth or confirm a suspected genetic condition. Results may show a pathogenic variant, a benign variant, or an uncertain finding.
When should I consider getting a genetic test?
You may want SALL4 genetic testing if you or your child has a pattern of findings such as limited eye movement, thumb or forearm differences, hearing loss, or kidney changes, especially when several happen together. Testing can also make sense when a close relative has a known SALL4 variant or a related condition 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 varies by the condition and the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, also shape how the body works over time. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is most useful when 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 also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body handles medicines, so the same treatment may work differently from one person to another. Some people break down a drug more slowly or more quickly, which can change how much medicine reaches the body over time. This can influence how well a treatment works or how likely someone is to notice side effects. These differences are common and are one reason medication response can vary even when people take the same dose.
What is Pharmacogenetics?
Pharmacogenetics studies how differences in genes can affect the way a person responds to medication. It examines relationships between genes and drugs to help explain why the same treatment may work differently from one person to another. With many medicines, genes can influence how strong a drug’s effects are or how the body handles it. This information can help support treatment decisions that are more informed and more personalized. More detailed information on this topic is available in the LearnHub.
Drugs influenced by the SALL4 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting medication response. If you have concerns about your health, new symptoms, or side effects from any medicine, it is best to discuss them with your doctor or pharmacist.
History
Researchers identified the SALL4 gene in the early 2000s while studying a human relative of the spalt family of developmental genes first described in fruit flies. Soon after, inherited variants in the SALL4 gene were linked to families with Duane radial ray syndrome, also called Okihiro syndrome, which connected the gene to a recognizable pattern of eye and limb differences. From these first observations, research expanded steadily. Doctors also found that changes in the same gene could appear in people diagnosed with acro renal ocular syndrome, helping clarify that these conditions were closely related. As genetic testing became more available, the picture grew clearer and older clinical labels were refined. Today, the SALL4 gene is best known in medicine for its role in these rare inherited conditions and for the way its discovery helped connect patterns seen in clinics to a specific genetic cause.