The TEX11 gene helps the testicles make sperm by guiding meiosis, the special cell division that gives sperm the right number of chromosomes. If the gene does not work properly, sperm cells may stop developing, which can lead to no sperm in semen or very low sperm counts and trouble fathering a child. Variants in the TEX11 gene are a recognized genetic cause of some cases of male infertility, especially when the cause was previously unclear.
What is a gene?
Genes are stretches of DNA that give your cells instructions to make molecules or to regulate processes in the body. Some genes carry the directions for producing proteins, the parts of cells that do much of the work. Others mainly help determine when certain processes occur, where they occur, and how strongly they run. Together, genes affect how the body develops and functions, and they can also shape how you respond to food, stress, and medications. To explore this topic in greater detail, you can learn more in the LearnHub.
Overview
TEX11Gene function
What if the gene works
The TEX11 gene helps sperm cells divide in a controlled way as they form. It supports the matching and exchange of DNA between chromosomes during this process, which is important for normal male fertility.
Risk
What if the gene does not work
Variants in the TEX11 gene can disrupt sperm development and cause some forms of male infertility, often with very low sperm counts or no sperm in semen. Milder and more severe variants may lead to degrees of reduced sperm production.
Treatment
What does that mean for your treatment
No TEX11-specific treatment or drug choice is currently established for people with a pathogenic variant in the TEX11 gene.
Conditions associated with TEX11
Gene function
What if the gene works
In sperm-forming cells, the TEX11 gene supports key steps in meiosis, the special cell division that makes sperm. Its protein helps matching chromosomes pair up, swap small pieces of DNA, and move through this process in an orderly way. Understanding TEX11 gene function in sperm development helps explain how the body prepares sperm cells.
TEX11 helps matching chromosomes find each other and stay aligned during meiosis. It supports a zipper-like connection between chromosome pairs, which keeps this stage organized.
This gene supports crossing over, a planned exchange of DNA between paired chromosomes. That exchange adds normal genetic variety to sperm and helps chromosome pairs remain linked until the right time.
TEX11 helps sperm-forming cells move through meiosis in a controlled sequence. By coordinating chromosome pairing and DNA exchange, it supports sperm cells receiving a balanced set of chromosomes.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants do not cause any noticeable effect and are simply part of natural genetic variation. Sometimes, though, a variant changes how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TEX11 gene often disrupt meiosis, the cell division step that forms sperm, so TEX11 gene variants can disrupt sperm development. Milder missense variants may weaken the protein or its interactions, while more severe truncating, splicing, or deletion variants can leave little or no working protein. This greater loss of function is more often linked to earlier meiotic arrest and more marked male infertility, including very low sperm counts or no sperm in semen.
How variants are linked to conditions
Pathogenic variants in the TEX11 gene cause an inherited form of male infertility, most often nonobstructive azoospermia and sometimes severe oligozoospermia. This form of male infertility linked to the TEX11 gene is X-linked and is usually found in people with testes who are being evaluated because semen contains very few or no sperm. A confirmed pathogenic variant can establish the diagnosis.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are common throughout the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors also contribute. In some situations, however, a single well-characterized variant in a specific gene may 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 the chance of fertility problems related to the TEX11 gene. In families with a harmful TEX11 change, the main factor is inheriting that change, and anyone concerned about personal risk can speak with a doctor or genetic counselor.
Inheritance of TEX11 variants
TEX11-related conditions follow an X-linked inheritance pattern, which explains how TEX11 variants are inherited in families. Because the TEX11 gene is on the X chromosome, a mother carrying a variant can pass it to both sons and daughters, while a father passes his X chromosome only to his daughters and not to his sons. Males who inherit a disease-causing TEX11 variant are more likely to show effects because they have one X chromosome. Females who carry the variant often have no clear symptoms, but they can still pass it on.
What does my TEX11 result mean for my family?
Because the TEX11 gene is on the X chromosome, a result in this gene can have implications for close relatives on the mother’s side of the family. Male relatives may be more likely to have fertility problems, while female relatives can carry the variant and pass it on even if they do not have symptoms themselves. In many families, parents, brothers, sisters, and maternal relatives may want to review the result together with a genetics specialist.
Genetic information
Genetic testing
How you find out about variants
When doctors use TEX11 genetic testing for male infertility, a lab looks at DNA from a blood sample or cheek swab to check the TEX11 gene for variants. Results may identify a variant that helps explain low sperm counts or no sperm in semen, or they may show a benign finding or one that is still uncertain.
When should I consider getting a genetic test?
Testing for the TEX11 gene may be worth discussing for men with unexplained infertility, especially when semen tests show no sperm or very low sperm counts. It can also be relevant if there is a family history of male infertility. A doctor or genetic counselor can help decide whether this test would add useful answers.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it reveals depends on the condition and the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, shape how the body works over time. For some conditions, especially those influenced by many genes, genetic information provides 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 such as medication response, genetic results may also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, how strongly it works, or how sensitive someone is to side effects. This is a common reason the same treatment may help one person more than another, or feel harder to tolerate in some people.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in genes affect the way people respond to medicines. It studies gene-drug patterns to help explain why the same treatment can work differently in different people. For many medicines, genes can influence both how strongly a drug works and how the body processes 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 TEX11 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how people respond to medicines, so most medication questions are best discussed with your doctor in the usual way. If you have side effects, are starting a new treatment, or have concerns related to fertility, a doctor can help decide what matters most for your care.
History
TEX11 came to attention as researchers studied genes on the X chromosome that are active in the testes and help sperm develop. In recent decades, awareness of this gene’s role has grown as work in animal models and human studies showed that TEX11 is important during meiosis, the special cell division that makes sperm. Building on this early work, scientists uncovered more about the gene when variants in TEX11 were reported in some men with nonobstructive azoospermia, a form of infertility in which sperm are absent from semen. These findings helped place TEX11 among the better known genes linked to male infertility and shaped later research on genetic causes of impaired sperm production.