The TEK gene helps control how blood vessels grow, seal, and stay stable. This gene plays an important role in the cells that line blood vessels, helping them respond to signals that keep blood flow smooth and vessel walls strong. If the gene does not work as expected, some people develop venous malformations, which are clusters of widened veins that may look blue under the skin or cause pain, swelling, or bleeding.
What is a gene?
Genes are sections of DNA that carry instructions your cells can use to make molecules or to manage processes in the body. Some genes hold the instructions for making proteins, which are the working parts of cells. Others mainly help regulate when certain processes happen, where they happen, and how strongly they run. Taken 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
TEKGene function
What if the gene works
The TEK gene helps control how blood vessels form, mature, and stay stable. It supports the cells lining blood vessels, helping them grow, survive, and limit leakage.
Risk
What if the gene does not work
Variants in the TEK gene are linked to venous malformations, with abnormal vein development causing soft blue skin or deeper lesions. Milder and more severe variants can influence how early they appear, how extensive they are, and whether pain develops.
Treatment
What does that mean for your treatment
No treatment or drug choice specific to the TEK gene is currently established for pathogenic or loss-of-function variants; care follows standard treatment for the condition involved. Research is exploring drugs that target TEK-related signaling in vascular malformations, mainly for overactive TEK variants, but this has not led to a standard TEK-directed approach for TEK loss-of-function variants.
Conditions associated with TEK
Gene function
What if the gene works
Healthy circulation depends on blood vessels that can grow, seal, and adapt from day to day. The TEK gene helps coordinate these jobs in the cells that line blood vessels. Understanding what the TEK gene does in blood vessels helps explain how your circulation stays organized from tiny capillaries to larger veins.
In cells lining blood vessels, the TEK gene makes a receptor, a protein that receives outside signals. It responds to angiopoietins (proteins that guide vessel behavior) so vessels can grow and stay organized.
This gene helps direct the building of new blood vessels during development and normal tissue renewal. It supports orderly growth so new vessels connect into a useful network.
TEK signaling helps blood vessel lining cells stay calm, connected, and well supported. It also helps these cells work with nearby support cells, which keeps vessel walls steady.
The TEK gene supports the barrier function of blood vessels, which helps keep blood and tissue fluid in the right places. This makes fluid movement across vessel walls more controlled.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These differences are common and help explain normal human variation, such as differences 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 cases, though, 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
Many TEK variants change how the receptor signals in cells that line blood vessels. Activating variants can leave it partly switched on, pushing vessel growth signals too far, while variants that reduce function can weaken signaling in developing eye drainage tissue. This explains how TEK gene variants affect protein function: milder changes may shift signaling only a little, while more severe variants can disturb it more and may be linked to earlier or more extensive features.
How variants are linked to conditions
Pathogenic variants in the TEK gene are best known for causing venous malformations, especially an inherited condition called multiple cutaneous and mucosal venous malformations, where soft blue or purple vein spots may affect the skin and mouth. Somatic TEK variants are also a well-established finding in many noninherited venous malformations. Rare TEK gene variants have also been linked to some cases of primary congenital glaucoma.
A variant is not necessarily a diagnosis
Genetic variants are a routine feature of human biology and are widely found across the population. Most do not directly affect health and simply contribute to natural human diversity. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences play a part. In some situations, though, one well-studied variant in a particular 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 risk related to the TEK gene. For many living with a TEK change, the chance of related health problems depends mostly on the exact gene change rather than lifestyle or everyday exposures, so personal guidance from a doctor or genetic counselor can help put that risk in context.
Inheritance of TEK variants
The inheritance of TEK gene variants depends on the specific condition and on whether the variant is present in all cells or only in affected tissue. When a disease-causing TEK gene variant is inherited in the germline, it is most often passed on in an autosomal dominant pattern, which means each child of an affected parent has a 50% chance of inheriting it. Some TEK gene variants are somatic, meaning they arise after conception in only part of the body and are not passed from parent to child.
What does my TEK result mean for my family?
For TEK, the best-known inherited pattern is dominant, which means a gene change can run through several generations of a family. Close relatives such as parents, brothers, sisters, and children may also carry the same change and could have venous malformations, even if their symptoms are milder or look different. In some families, the change starts for the first time in one person rather than being passed down from a parent.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a change in the TEK gene, doctors use genetic testing for TEK variants, usually on a blood or saliva sample. A lab reads the gene's DNA code and compares it with the usual sequence to look for variants that may help explain a vascular condition or support a diagnosis.
When should I consider getting a genetic test?
Consider TEK genetic testing if you or your child has multiple venous malformations, especially soft blue-purple skin or mouth spots, or if these run in the family. A TEK variant can help explain an inherited tendency to develop these vein changes and may clarify the diagnosis.
A genetic result is only one part of your health story
A genetic result can provide useful information, though how much it can explain varies depending on the condition and the type of variant involved. Lifestyle, environment, age, and medical history are among the many factors that shape how the body works over time. For some conditions, especially those shaped by many genes, genetic information gives context rather than certainty and is most helpful when considered alongside other parts of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, these results can also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body handles some medicines and how strongly you respond to them. Small differences in genes can change how a drug is absorbed, broken down, moved through the body, or how well it reaches its target. This helps explain why the same treatment works well for one person, has little effect in another, or causes more side effects in someone else. These differences are common and are one part of why medication response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medicines. It looks at connections between genes and drugs to better explain why the same treatment may work differently from one person to another. For many medications, genes can affect both how strongly a drug works and how the body processes it. This information can help support treatment decisions that are more informed and more individualized. More detailed information on this topic is available in the LearnHub.
Drugs influenced by the TEK gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding everyday medication choices, so questions about medicines or side effects are best discussed with your doctor. For TEK, research has mainly focused on targeted treatment in some blood vessel conditions linked to TEK changes, rather than on routine drug-response guidance.
History
The TEK gene entered medical research in the 1990s as scientists studied how blood vessels form and stay stable. It was first identified through work on a receptor later called TIE2, which became an important marker in vascular biology. From these first observations, research expanded steadily. In the late 1990s, inherited variants in the TEK gene were linked to some families with venous malformations, helping explain why these vein changes can run in families. Later studies found that non inherited TEK variants can also appear in affected tissue, which sharpened doctors’ understanding of these conditions. This history made the TEK gene a well known part of research on vascular anomalies.