The SPRTN gene helps your cells remove proteins that get stuck on DNA while DNA is being copied, and it plays an important role in protecting the copied DNA from damage. If this gene does not work properly, cells can build up damage, and people with pathogenic variants in both copies may develop a rare condition with short stature, cataracts, hearing loss, early aging features, and a higher chance of liver cancer.
What is a gene?
A gene is a stretch of DNA that carries instructions your cells use to make molecules or regulate activities in the body. Some genes hold the information needed to produce proteins, the functional parts of cells. Others mainly direct when certain processes happen, where they occur, and how strongly they operate. Together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. For a closer look at this topic, you can find more in the LearnHub.
Overview
SPRTNGene function
What if the gene works
The SPRTN gene helps cells clear proteins that become stuck on DNA during DNA copying. This supports normal DNA repair and helps growing cells keep their genetic material stable.
Risk
What if the gene does not work
More disruptive variants in the SPRTN gene can cause Ruijs-Aalfs syndrome, with growth restriction, short stature, cataracts, and a higher chance of early liver cancer. Milder variants may lead to a less severe or later onset pattern.
Treatment
What does that mean for your treatment
No SPRTN-specific treatment or drug-selection approach is currently established for people with pathogenic variants in the SPRTN gene. The SPRTN gene is being studied in cancer and DNA-damage research, but this has not yet led to routine, guideline-based treatment choices.
Conditions associated with SPRTN
Gene function
What if the gene works
Your cells constantly copy and maintain DNA as they grow and renew. The SPRTN gene helps clear protein blockages from DNA so this work can keep moving. This is especially important during cell division, when long stretches of DNA need to be copied cleanly and in order.
The SPRTN gene helps remove proteins that become tightly attached to DNA. Its protein cuts these obstacles into smaller pieces so other repair steps can finish the cleanup.
This gene supports DNA-protein crosslink repair, which means fixing places where a protein is stuck on DNA. By clearing these blocks, it helps the DNA copying machinery keep moving during cell division.
The SPRTN gene helps cells handle routine stress that appears while DNA is being copied. This supports steady chromosome maintenance and orderly transfer of genetic information to new cells.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These changes are common and are part of normal human diversity, such as differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply reflect natural genetic variation. In some situations, however, a variant can change how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SPRTN gene can impair DNA repair by leaving proteins stuck on DNA; these SPRTN gene variant effects on DNA repair often come from an unstable protein, weaker protein-cutting activity, or poor access to damaged DNA. Milder variants may leave some activity, while more severe loss-of-function variants can leave little or none, which may shape how early and how strongly Ruijs-Aalfs syndrome appears.
How variants are linked to conditions
Pathogenic variants in both copies of the SPRTN gene cause Ruijs-Aalfs syndrome, a rare inherited condition. This SPRTN gene condition is linked to short stature, features of early aging, and a raised chance of developing hepatocellular carcinoma, a type of liver cancer, often at a young age. In people with this diagnosis, liver disease and growth or developmental differences may also be part of the picture.
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 directly affect health and instead reflect normal human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors contribute. In some situations, though, a single well-characterized variant in a specific 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 risks related to the SPRTN gene. In families with disease-causing SPRTN changes, risk is mainly shaped by the inherited gene change itself, so regular medical follow-up can be more useful than focusing on lifestyle changes alone.
Inheritance of SPRTN variants
SPRTN-related conditions are inherited in an autosomal recessive pattern. This means a person usually needs to inherit two disease-causing variants in the SPRTN gene, one from each parent, to have the condition. Parents who each carry one variant are often unaffected carriers, and with each pregnancy there is a 25% chance their child will inherit both variants, a 50% chance the child will be a carrier, and a 25% chance the child will inherit neither variant. In practical terms, how SPRTN variants are inherited usually depends on both parents passing on a variant in the SPRTN gene.
What does my SPRTN result mean for my family?
Changes in the SPRTN gene are linked to a rare inherited condition that usually happens when a child receives one changed copy from each parent. For family members, this often means parents may be healthy carriers, and brothers or sisters could also be affected or be carriers. Other relatives may also carry the variant, especially on the same side of the family.
Genetic information
Genetic testing
How you find out about variants
SPRTN genetic testing usually uses a blood sample or saliva sample to read the SPRTN gene and look for variants linked to a person’s symptoms or family history. Results may come from a single-gene test, a broader panel, or exome sequencing, and the lab classifies any variant based on current medical evidence.
When should I consider getting a genetic test?
Testing for the SPRTN gene may be worth discussing if a child has a rare pattern of poor growth, early graying or cataracts, and there is a family history of early liver cancer or a similar inherited condition. It can also help clarify risk when a close relative is known to carry a harmful SPRTN change.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, but how informative it is depends on the condition and the kind of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, influence how the body functions. For some conditions, especially those shaped 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 also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. A treatment that works well for one person may work less well for another, or may cause more side effects, because the body can absorb, break down, transport, or respond to drugs differently. These inherited differences are common and can influence both how strongly a medicine works and how sensitive someone is to it.
What is Pharmacogenetics?
Pharmacogenetics looks at how genetic differences can shape a person’s response to medications. By examining connections between genes and drugs, it helps explain why the same treatment may work differently in different people. For many medicines, genes can affect 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 explore this topic further in the LearnHub.
Drugs influenced by the SPRTN gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choices. If a medicine is causing unexpected side effects, is not working as expected, or you have general health concerns, it is best to discuss this with your doctor or pharmacist.
History
The SPRTN gene entered medical research through work on a rare inherited condition later called Ruijs-Aalfs syndrome. In 2014, researchers linked harmful variants in the SPRTN gene to children and young adults with short stature, signs of early aging, and a higher chance of developing liver cancer. First described in the scientific literature as part of early genetics, this discovery gave families a clearer explanation for a pattern that had been difficult to classify. Building on this early work, scientists then connected SPRTN to a broader area of DNA repair research. These studies made SPRTN an important gene in understanding how cells cope with certain kinds of DNA damage.