The LPA gene helps your liver make apolipoprotein(a), a protein that joins an LDL particle to form lipoprotein(a), or Lp(a). Many variants are harmless, while a few may change how the gene works. If this leads to high Lp(a) levels, it can raise the chance of early heart disease, stroke, or narrowing of the aortic valve. LPA is getting more attention in heart care because high Lp(a) is a common inherited risk factor that standard cholesterol habits may not fully explain.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate processes in the body. Some genes hold the information needed to produce proteins, the parts of cells that do the work. Others mainly help determine when certain processes happen, where they happen, and how strongly they run. Together, genes influence how the body develops and functions, and they can shape how you respond to food, stress, or medications. For a more detailed look at this topic, you can find more in the LearnHub.
Overview
LPAGene function
What if the gene works
The LPA gene helps make apolipoprotein(a), part of lipoprotein(a). This blood particle carries cholesterol and may influence blood clotting and blood vessel repair.
Risk
What if the gene does not work
Variants in the LPA gene can raise lipoprotein(a) levels, which may increase the risk of early heart disease, stroke, and calcific aortic valve narrowing. Effects range from mild to more marked depending on the variant and how much lipoprotein(a) rises.
Treatment
What does that mean for your treatment
No treatment changes are currently based on pathogenic or loss-of-function variants in the LPA gene in routine guidelines. The LPA gene is being studied as a drug target, with medicines that lower lipoprotein(a) in late-stage clinical trials.
Gene function
What if the gene works
In your bloodstream, the LPA gene helps build a special particle called lipoprotein(a), or Lp(a). This particle is one way your body moves cholesterol and other fats through the blood. Understanding this helps explain what the LPA gene does in the body every day.
The LPA gene provides instructions for apolipoprotein(a), a protein made mainly in the liver. This protein attaches to an LDL particle (a cholesterol carrying particle) to form Lp(a).
As part of Lp(a), apolipoprotein(a) travels through the bloodstream carrying cholesterol and other fats. This supports the normal movement of these substances between the liver, blood, and body tissues.
Apolipoprotein(a) gives Lp(a) a surface that can attach to certain fats and proteins in the blood. These links help shape where the particle circulates and how long it stays in the blood.
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, including variation 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, though, a variant can more substantially change how a gene functions and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the LPA gene often alter apo(a), the protein part of lipoprotein(a), by changing its size or how much of it the liver releases. Some have small effects, while more disruptive variants can greatly reduce or stop apo(a) production; others create a shorter form that is secreted more efficiently, which is central to how LPA gene variants affect lipoprotein(a) levels. These differences can influence lifelong risk of artery disease and aortic valve narrowing.
How variants are linked to conditions
Variants in the LPA gene are strongly linked to higher lipoprotein(a) levels in the blood and, in many people, a higher chance of coronary artery disease, heart attack, ischemic stroke, and aortic valve stenosis. Research on how variants in the LPA gene affect heart disease risk shows that this gene is one of the clearest inherited influences on lipoprotein(a). These common variants change risk, not certainty, so some people with them never develop cardiovascular disease.
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 have a direct effect on health and instead represent normal human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when several genes and environmental factors also contribute. In some situations, though, a single well characterized variant in a particular gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For people with LPA changes that raise lipoprotein(a), inherited risk is largely set from birth. Risk is often higher with a strong family history, very high lipoprotein(a) levels, and other heart risk factors such as high LDL cholesterol, smoking, diabetes, high blood pressure, or kidney disease.
Inheritance of LPA variants
There is not a single, broadly confirmed Mendelian pattern for how LPA gene variants are inherited in relation to one specific LPA linked condition, because this gene mainly influences lipoprotein(a) levels and related heart and blood vessel risk rather than acting like a classic single gene disease. In practice, how LPA gene variants are inherited reflects the fact that the LPA gene is on chromosome 6, an autosome, so you inherit one copy from each parent. Both parental copies can affect your lipoprotein(a) level.
What does my LPA result mean for my family?
There isn't yet a broadly confirmed inheritance pattern tied to a single specific condition for the LPA gene, though changes in LPA can strongly affect lipoprotein(a) levels and this often runs in families. If you have a specific LPA result, close relatives may also share similar inherited patterns, but what that means can differ from family to family. A doctor or genetic counselor can help explain what your result could mean for relatives.
Genetic information
Genetic testing
How you find out about variants
Genetic testing can check the LPA gene for inherited variants linked to higher lipoprotein(a), so people looking into how to test for LPA gene variants usually give a blood or saliva sample. A laboratory reads the DNA to look for known changes, which can help explain raised lipoprotein(a) and inherited cardiovascular risk.
When should I consider getting a genetic test?
There is not yet a broadly established reason to do genetic testing specifically for the LPA gene in routine care. If early heart disease runs in your family or your lipoprotein(a) blood level is high, decisions about any genetic testing are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it reveals varies depending on the condition and the type of variant involved. Age, environment, lifestyle, and medical history all help shape how the body works over time. With some conditions, especially those influenced 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 may give a clear answer. In areas like medication response, genetic results can also help put individual experiences into perspective.
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 slowly, while another may process it faster, so the same treatment can lead to different results. These inherited differences are common and can influence how well a medicine works or how likely someone is to notice side effects. Medication response is shaped by genes along with 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 the relationship between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence both how strongly a drug works and how the body processes it. This information can support more informed, more individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the LPA gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice, so general questions about medicines or heart health are best discussed with your doctor. The LPA gene has been studied in heart treatment research because it affects lipoprotein(a), but these findings are not used routinely to choose medicines.
History
The history of the LPA gene began with the discovery of lipoprotein(a), often written as Lp(a), by Norwegian physician Kare Berg in 1963, when he recognized it as an inherited trait in the blood. At first, researchers focused on the protein itself and on why levels varied so much between families. In recent decades, knowledge has built on a long tradition of observing inherited traits. By the late 1980s and early 1990s, scientists linked these differences to the LPA gene and showed that inherited variation strongly shapes a person’s Lp(a) level. This helped move Lp(a) from a biochemical curiosity to an established part of cardiovascular genetics. Over time, descriptions became more precise as genetic testing and large population studies refined the picture.