The LACC1 gene helps immune cells manage energy and keep inflammation more balanced when your body responds to germs or tissue stress. This gene plays an important role in preventing immune activity from becoming poorly controlled. If the LACC1 gene does not work well, some people may develop ongoing inflammatory conditions, including certain forms of arthritis, bowel inflammation, or related immune problems. LACC1 is mainly known in medical genetics rather than popular culture.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or control processes in the body. Some genes provide the directions for making proteins, the parts that do much of a cell’s work. Other genes mainly regulate when certain processes happen, where they happen, and how active they are. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, and medications. To explore this topic in more detail, you can find more in the LearnHub.
Overview
LACC1Gene function
What if the gene works
The LACC1 gene helps certain immune cells manage energy and use fats. This supports steady inflammatory signaling and everyday defense against germs.
Risk
What if the gene does not work
More disruptive variants in the LACC1 gene can cause early onset inflammatory disease, often juvenile arthritis and sometimes inflammatory bowel disease. Milder variants are linked to Crohn's disease or leprosy risk, and effects can vary in timing and severity.
Treatment
What does that mean for your treatment
At present, a pathogenic variant in the LACC1 gene does not direct a specific medication or established treatment choice. Care is guided by the person’s symptoms and clinical diagnosis rather than the gene result itself. The LACC1 gene is being studied for its role in immune pathways linked to arthritis and bowel inflammation, but this has not yet led to an established therapy aimed at LACC1.
Conditions associated with LACC1
Gene function
What if the gene works
The LACC1 gene helps certain immune cells stay fueled while they respond to everyday challenges such as germs and tissue stress. Its protein is especially active in cells like macrophages, which clear debris and help coordinate inflammation. Understanding how the LACC1 gene helps immune cells use energy makes its role in normal body defense easier to see.
One of the main jobs of the LACC1 gene is to support how macrophages make and use energy. This helps them stay active for routine cleanup and defense work.
Inside these immune cells, LACC1 helps manage how fats are processed for energy. Using fats well supports steady cell activity during inflammation and other moments that need extra energy.
The protein made from the LACC1 gene supports energy intensive tasks in macrophages, including cleanup and germ handling. This helps these cells carry out normal immune work in a steady, coordinated way.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help shape normal human diversity, such as variation 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. In some situations, 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
Variants in the LACC1 gene can change the protein’s shape, stability, or the amount a cell can make, which helps explain how LACC1 gene variants affect protein function. Milder variants may partly reduce activity, while more disruptive variants can leave very little working protein. In immune cells, this can alter energy handling and weaken normal responses to bacterial signals. When both copies carry severe variants, autoinflammatory disease may begin earlier and have a stronger effect.
How variants are linked to conditions
Pathogenic variants in the LACC1 gene can cause a rare inherited autoinflammatory condition, and LACC1 gene variants are best established as a cause of early-onset juvenile arthritis with fever and ongoing inflammation. In some families, LACC1-related disease also includes inflammatory bowel disease. Separate common variants in the LACC1 gene have been linked to higher population-level risk of Crohn’s disease and leprosy, but these associations do not mean someone will definitely develop either condition.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are widely seen across the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, having a variant associated with a condition indicates a possible link rather than a firm diagnosis, especially when several genes and environmental factors are involved. In some instances, however, 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 lifestyle or environmental factors that clearly increase or reduce health risks related to the LACC1 gene itself. Personal risk can still vary based on the exact gene change, family history, and other genes, so discussing your results with a doctor or genetic counselor can help put them in context.
Inheritance of LACC1 variants
LACC1 gene inheritance for established LACC1-related conditions is usually autosomal recessive. This means a person typically inherits one LACC1 gene variant from each parent, while parents who carry one variant often do not have symptoms. When both parents are carriers, each pregnancy has a 25% chance of the child inheriting both variants, a 50% chance of being a carrier, and a 25% chance of inheriting neither variant. The LACC1 gene is on chromosome 13, so this pattern affects people of any sex equally.
What does my LACC1 result mean for my family?
For many families, a disease-causing change in the LACC1 gene is passed down in a recessive pattern, which means close relatives may also be carriers even if they have no symptoms. Brothers and sisters could have the same condition or be carriers, and parents are often carriers as well. Other blood relatives may also carry the same gene change, especially on the same side of the family.
Genetic information
Genetic testing
How you find out about variants
LACC1 genetic testing uses a blood or saliva sample to read the LACC1 gene and look for variants. A lab compares your DNA sequence with the usual reference sequence, then classifies any change as likely disease causing, benign, or uncertain.
When should I consider getting a genetic test?
Consider LACC1 genetic testing when a child has severe, early-onset inflammatory illness such as arthritis, repeated fevers, or bowel inflammation, especially if close relatives have similar problems. Testing can help confirm whether a rare inherited LACC1-related condition is the cause.
A genetic result is only one part of your health story
A genetic finding can be informative, yet how much it explains varies by the condition and by 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 provides context rather than certainty and is most useful when considered alongside other parts of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, genetic results may also help place personal experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can influence how your body responds to medicines. This helps explain why the same treatment works well for one person, seems less helpful for another, or causes more side effects in some people. Differences in genes can affect how the body breaks down, moves, or responds to a drug, and this kind of variation is common.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies gene and drug patterns to help explain why the same treatment may work differently from one person to another. For many medications, genes influence how strongly a drug works or how the body handles it. This information can support treatment decisions that are more informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the LACC1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how medicines will work, so any concerns about treatment, side effects, or your overall health are best discussed with your doctor.
History
LACC1 entered medical genetics through studies looking for inherited clues to inflammatory disease. In recent decades, awareness of this gene’s role has grown as researchers linked variants in the LACC1 gene, first known as C13orf31, to Crohn’s disease, leprosy, and some forms of juvenile idiopathic arthritis. Early reports used different names, and the gene was later also called FAMIN as its place in immune research became clearer. From these first observations, research expanded steadily across different populations, helping confirm that the signal was real. The way this gene was viewed has shifted over time, from a little known DNA region to a recognized part of inflammation genetics. These historical steps shaped today’s understanding.