The SH3BP2 gene helps cells pass along signals that guide bone remodeling and parts of the immune system. Your body relies on this gene to keep growth and repair in the jaw more balanced during development. When a pathogenic variant changes how it works, bone cells can become too active, and some people develop cherubism, a condition that can cause painless swelling of the cheeks or jaw and changes in how teeth come in. Effects can vary, but the main impact is usually on the face and mouth rather than overall health.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes hold the information needed to produce proteins, which are the working parts of cells. Other genes mainly control when certain processes happen, where they take place, and how strongly they operate. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. For a more detailed look at this topic, you can learn more in the LearnHub.
Overview
SH3BP2Gene function
What if the gene works
The SH3BP2 gene helps pass signals inside immune cells and bone cells. This supports normal bone remodeling and helps cells respond to growth and immune signals.
Risk
What if the gene does not work
Variants in the SH3BP2 gene are best known for causing cherubism, a condition that changes jaw bone growth and can make the cheeks look full. Effects can range from mild to more noticeable, and tooth eruption may also be affected.
Treatment
What does that mean for your treatment
For pathogenic variants in the SH3BP2 gene, no gene-specific treatment or management approach is currently established. Care is guided by symptoms and jaw changes rather than a targeted drug choice, and the SH3BP2 gene is mainly being studied as a research target in bone remodeling and inflammatory pathways.
Conditions associated with SH3BP2
Gene function
What if the gene works
Healthy bone renewal and immune cell communication depend in part on the SH3BP2 gene. It helps cells pass along messages from their surface to their inner control systems. This helps explain what the SH3BP2 gene does in the body from day to day.
Inside cells, the SH3BP2 gene helps relay messages from the cell surface to the systems that control activity. Its protein acts as a scaffold, meaning it brings signaling partners together so communication stays organized.
In white blood cells, SH3BP2 helps signals trigger a measured response to germs and other challenges. This supports routine tasks such as activation, movement, and the release of immune signals when needed.
The SH3BP2 gene helps bone cells communicate during normal bone remodeling, the ongoing process of removing old bone and replacing it. This steady turnover helps maintain bone structure over time.
What is a variant?
A genetic variant is a minor change in a gene’s DNA sequence. 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 have no noticeable effect and simply represent natural genetic variation. Sometimes, however, a variant changes how a gene functions more substantially and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Most disease-causing changes in the SH3BP2 gene are missense variants that make the SH3BP2 protein harder for the cell to break down, so it builds up and overactivates signaling in bone and immune cells. This is how SH3BP2 gene variants affect protein function in cherubism. Some variants seem to have a milder effect, while others cause stronger protein buildup, which can influence how early bone changes appear and how noticeable they become.
How variants are linked to conditions
Pathogenic variants in the SH3BP2 gene cause cherubism, a rare inherited condition that affects the jaw bones and often becomes noticeable in childhood. Among conditions linked to SH3BP2 gene variants, cherubism is the main well-established finding. People in the same family can be affected to different degrees, from mild changes seen on imaging to more noticeable fullness of the cheeks or jaw.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a normal feature of human biology. Most do not directly affect health and instead reflect natural variation between people. For many genes, having a variant associated with a condition points to a possible link rather than a firm 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?
For SH3BP2, the main risk comes from inheriting a disease-causing gene change, which is linked with cherubism, a condition that affects the jaw bones. How strongly it shows up can vary even within the same family, and there is not enough evidence to say that lifestyle changes lower the chance of developing it.
Inheritance of SH3BP2 variants
Variants in the SH3BP2 gene linked to cherubism are usually inherited in an autosomal dominant pattern. This means a parent carrying the variant can pass it to a child with a 50% chance in each pregnancy, whether the child is a son or a daughter. Some people with cherubism have a new, de novo variant in the SH3BP2 gene, which means it was not inherited from either parent. The SH3BP2 inheritance pattern can look different within the same family because signs may vary from person to person.
What does my SH3BP2 result mean for my family?
For SH3BP2, the main family concern is a condition called cherubism, which usually runs in families in a dominant way. This means close relatives, such as a parent, brother, sister, or child, may also carry the same gene change, even if their jaw changes are milder or they have few symptoms. Some cases start as a new gene change in one person, so a parent is not always the source.
Genetic information
Genetic testing
How you find out about variants
In practice, SH3BP2 genetic testing usually uses a blood or saliva sample to read the DNA sequence of the SH3BP2 gene. It can show whether a variant is present, often when cherubism is suspected or runs in a family. Results may identify a disease-causing variant, a benign variant, or a variant of uncertain significance.
When should I consider getting a genetic test?
Consider testing for the SH3BP2 gene if a child has early jaw swelling, full cheeks, loose or missing teeth, or scans suggesting cherubism, a rare condition affecting jaw bone growth. Testing can also help when this runs in the family or to confirm the cause after an exam.
A genetic result is only one part of your health story
A genetic finding can be informative, but how much it explains depends on the condition and on the type of variant involved. How the body functions over time is also shaped by many factors, including lifestyle, environment, age, and medical history. In some conditions, particularly those affected 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 such as 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 responds to medicines. Some people break down a drug faster or slower than others, while some are more or less sensitive to its effects. This is a common reason the same treatment may work well for one person but less well for another, or may be more likely to cause side effects.
What is Pharmacogenetics?
Pharmacogenetics looks at how genetic differences can affect a person’s response to medications. It examines links between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support treatment choices that are more informed and more personalized. To explore this subject further, you can learn more in the LearnHub.
Drugs influenced by the SH3BP2 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how medicines will work or which side effects they may cause. If you have concerns about a medicine, side effects, or past unusual reactions, it is best to talk with your doctor or pharmacist.
History
SH3BP2 entered medical genetics through research on cherubism, a rare inherited condition that affects the jaw and facial bones. Families with this pattern had been described for many years before the genetic cause was pinned down. From these first observations, research expanded steadily. In the early 2000s, researchers identified variants in the SH3BP2 gene as the cause of cherubism in many affected families, which gave doctors a clearer way to confirm the diagnosis. That discovery also helped connect older clinical descriptions with modern genetic testing and improved understanding of how this condition runs in families.