The ANGPTL8 gene helps control how your body handles blood fats, especially after eating, by working with other proteins to slow the breakdown of triglycerides. The protein made by this gene helps your cells shift fat use and storage when food is available. If the ANGPTL8 gene does not work as expected, triglyceride levels may change and the body may handle cholesterol less smoothly. Variants in this gene are being studied in relation to obesity, diabetes, and fatty liver, but most do not by themselves define a diagnosis.
What is a gene?
Genes are stretches of DNA that give your cells instructions for making molecules or directing activities in the body. Some genes carry the code for proteins, the parts of cells that do much of the work. Others mainly regulate when certain processes happen, where they take place, and how strongly they are carried out. Working together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, and medications. For a more detailed explanation of this topic, you can visit the LearnHub.
Overview
ANGPTL8Gene function
What if the gene works
The ANGPTL8 gene helps control how your body handles fats in the blood, especially after eating. Its protein works with other signals to guide triglyceride use and storage.
Risk
What if the gene does not work
Milder to more severe variants in the ANGPTL8 gene can reduce how well this protein helps control triglyceride handling by influencing lipoprotein lipase, an enzyme that clears blood fats. This can alter cellular fat storage signals.
Treatment
What does that mean for your treatment
No treatment or drug choice approach based on pathogenic or loss of function variants in the ANGPTL8 gene is currently established in clinical guidelines. The ANGPTL8 gene is being studied as a possible biomarker and drug target in research on triglyceride levels and metabolic disease.
Gene function
What if the gene works
After a meal, your body needs to decide whether to use fat right away or store it for later. The ANGPTL8 gene helps guide that shift by supporting normal blood fat handling, especially in the liver and fat tissue. This background helps explain why it matters for how your body handles fats after eating.
The ANGPTL8 gene helps control triglycerides, the main fats carried in your blood. Its protein works with the ANGPTL3 gene to slow lipoprotein lipase, an enzyme that breaks down triglycerides so tissues can take them up.
Activity of this gene tends to rise after eating, when insulin and nutrients are more available. This helps your body move from using circulating fat as fuel toward storing more of that fat for later needs.
By changing where triglycerides are broken down, the ANGPTL8 gene helps direct more fat toward adipose tissue, your main fat storage tissue. This supports normal energy balance between times of eating and fasting.
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, such as differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not cause any noticeable effect and simply represent 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
Some ANGPTL8 variants change the protein’s shape, stability, or release from cells, which helps explain how ANGPTL8 gene variants affect protein function. These changes can weaken its interaction with ANGPTL3 or reduce how strongly it influences lipoprotein lipase, an enzyme that breaks down fats in the blood. Milder variants may only slightly reduce protein activity, while more severe variants can truncate the protein or stop it from being made at all.
How variants are linked to conditions
The ANGPTL8 gene does not yet have a broadly confirmed link to a specific health condition, although studies continue to explore whether some variants may be tied to differences in metabolic health. Current evidence on how variants in the ANGPTL8 gene are linked to conditions is still developing, so people with a reported ANGPTL8 finding should interpret it with their clinician or genetic counselor.
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 human diversity. For many genes, having a variant associated with a condition indicates a possible association rather than a definite diagnosis, especially when multiple genes and environmental factors are involved. In some situations, though, a single well-characterized variant in a specific gene can be 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 risk related to the ANGPTL8 gene. ANGPTL8 has mainly been studied in connection with blood fats, weight, and blood sugar, and those are shaped by many genes as well as everyday factors like diet, activity, and overall health.
Inheritance of ANGPTL8 variants
There is not yet a broadly confirmed, disease-specific Mendelian pattern for inheritance of the ANGPTL8 gene, so ANGPTL8 gene inheritance is not described in the same clear way as classic dominant or recessive conditions. Research links some ANGPTL8 variants to differences in blood fat levels and metabolism, but these findings do not support a single established family pattern. The ANGPTL8 gene is located on chromosome 19, which is an autosome, so you inherit one copy from each parent.
What does my ANGPTL8 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific health condition for the ANGPTL8 gene. If you have a specific ANGPTL8 result and questions about what it could mean for your family, a doctor or genetic counselor can help explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the ANGPTL8 gene, a lab usually studies DNA from a blood sample or cheek swab. Genetic testing for ANGPTL8 variants reads the gene’s sequence to check for changes, but it is not part of routine care and results are interpreted alongside your personal and family health history.
When should I consider getting a genetic test?
There is not yet a broadly established, ANGPTL8-specific medical reason for genetic testing. Decisions about testing are usually based on your personal health and family history, together with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic finding 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, influence how the body works over time. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best considered alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas such as medication response, genetic results may help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. One person may break down a drug more quickly, while another may process it more slowly or be more sensitive to its effects. These common differences can influence how well a treatment works and the chance of side effects. Medication response also depends on other factors, including age, kidney and liver function, other medicines, and overall health.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies links between genes and drugs to help explain why the same treatment can work differently from one person to another. With many medicines, genes influence either how powerfully a drug works or how the body handles it. This information can support treatment decisions that are better informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the ANGPTL8 gene
When should I seek medical advice?
There isn't yet a broadly confirmed role for this gene in predicting medication response, so talk with your doctor if you have questions about a medicine, side effects, or changes in your treatment.
History
The ANGPTL8 gene entered the research literature in the early 2010s, when several groups identified it independently and gave it different names, including lipasin, RIFL, and betatrophin. Early animal studies drew strong interest because the betatrophin name suggested a possible link to growth of insulin producing cells in the pancreas. That idea received wide attention, but later studies did not confirm the original claim, and the field moved away from that interpretation. Scientific classifications changed as researchers learned more about the gene. In recent decades, awareness of this gene’s role has grown mainly through work on blood fat regulation and metabolic health. The history of the ANGPTL8 gene is now often cited as a useful example of how promising early findings are tested and refined over time.