The CABLES1 gene helps put the brakes on cell growth and division, and if it does not work well, some cells may keep growing when they should stop. This gene plays an important role in hormone producing tissues, especially the pituitary gland, where it supports normal control of cell turnover. Certain rare variants in the CABLES1 gene have been linked to pituitary tumors, which can upset hormone balance and sometimes lead to symptoms such as headaches, vision changes, or signs of too much cortisol.
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 provide the information needed to produce proteins, the parts of cells that do much of the work. Others mainly help direct when certain processes happen, where they happen, and how active they are. Taken together, genes affect how the body develops and works, and they can also shape how you respond to food, stress, or medications. To explore this subject in greater depth, you can find more in the LearnHub.
Overview
CABLES1Gene function
What if the gene works
The CABLES1 gene helps control how your cells grow and divide. It supports the cell cycle’s natural brakes and may help cells respond to stress.
Risk
What if the gene does not work
Less effective CABLES1 can weaken normal control of pituitary cell growth and is linked to some corticotroph pituitary tumors, often presenting as Cushing disease. Milder and more severe variants may influence whether features appear and how strongly.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently guided specifically by a pathogenic or loss-of-function variant in the CABLES1 gene. The CABLES1 gene is being studied as a tumor suppressor marker in some pituitary tumors, but this has not yet changed routine management.
Gene function
What if the gene works
Healthy tissues depend on careful control of when cells grow, pause, and divide. The CABLES1 gene helps coordinate that timing by linking proteins that manage the cell cycle. This is part of how the CABLES1 gene helps control cell growth in day to day tissue renewal.
This gene helps cells move through the cell cycle in a controlled, orderly way. It works with proteins that set the pace of growth and division.
The CABLES1 gene makes a protein that acts like a connector inside cells. It helps bring key control proteins into the same network so growth signals and pause signals stay coordinated.
One of the roles of the CABLES1 gene is to support the cell's natural braking system. By reinforcing stop and check signals, it helps cells pause before continuing to divide.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and help explain normal differences among people, such as appearance, metabolism, or the way the body responds to environmental influences. Many variants do not lead to any noticeable effect and are simply part of natural genetic variation. In some situations, however, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the CABLES1 gene can change the shape, stability, or binding surfaces of the CABLES1 protein, which shows how variants influence the CABLES1 gene's function at a cellular level. Some single-letter changes may only partly weaken key protein interactions, while more disruptive variants can shorten the protein or greatly reduce how much reaches the cell. This creates a spectrum from milder loss of function to more severe loss of function.
How variants are linked to conditions
At this time, the CABLES1 gene does not yet have a broadly confirmed link to a specific health condition, although research on CABLES1 gene variants linked to conditions is still developing. Anyone with a confirmed CABLES1-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information.
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 simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. 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?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the CABLES1 gene. If a CABLES1 change is found, personal risk often depends more on the exact variant and family history than on known lifestyle factors, and a doctor or genetic counselor can help explain what it may mean.
Inheritance of CABLES1 variants
There is not yet a broadly confirmed inheritance pattern tied to a specific CABLES1 related condition, so how variants of the CABLES1 gene are inherited in a disease causing way is still being clarified. CABLES1 is on chromosome 18, which is an autosome. That means each person inherits one copy of the CABLES1 gene from their mother and one copy from their father.
What does my CABLES1 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for CABLES1, though this can become clearer as research grows. If you have a CABLES1 result and want to understand what it could mean for close relatives, a doctor or genetic counselor can review your exact finding in the context of your family history.
Genetic information
Genetic testing
How you find out about variants
CABLES1 genetic testing usually uses a blood or saliva sample. A laboratory reads the DNA in the CABLES1 gene to look for variants, often through a multigene panel or broader sequencing test. Results may find a disease causing variant, a benign variant, or a variant of uncertain significance, which means the finding is not yet clear.
When should I consider getting a genetic test?
There is no broadly established reason for most people to have CABLES1 testing. It may be considered as part of genetic testing for some people with pituitary tumors, especially Cushing disease starting in childhood or a family history of these tumors, together with a genetics specialist.
A genetic result is only one part of your health story
Genetic test findings can provide useful insight, but how much they reveal varies based on the condition and the kind of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. For some conditions, especially those shaped by many genes, genetic information provides context rather than certainty and is best understood together with other parts of care. In other situations, a genetic result may offer a clear answer. In areas like medication response, genetic results can 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, moves it through the body, or responds to it at the target it is meant to act on. This helps explain why the same treatment works well for one person, works less well for another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics is the study of how differences in genes affect the way a person responds to medication. It examines gene-drug patterns to help explain why the same treatment can work differently from one person to another. With many medicines, genes influence both how strongly a drug works and how the body processes it. This information can help guide treatment decisions that are more informed and more personalized. More detail on this topic is available in the LearnHub.
Drugs influenced by the CABLES1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice or dose, so general questions about side effects, how well a medicine is working, or other health concerns are best discussed with your doctor.
History
CABLES1 was identified in the early 2000s during research on proteins that help coordinate cell growth and signaling. Initially understood only through visible traits, later recognized as tied to a specific gene, it drew attention because it could connect important cell cycle pathways studied in cancer and brain biology. From these first observations, research expanded steadily, and scientists found that lower CABLES1 activity appeared in several tumor types. Later studies also linked changes in the CABLES1 gene to some pituitary tumors and to rare inherited conditions affecting growth and hormone balance. Over time, scientists’ understanding of the gene’s function has changed, with CABLES1 now viewed as part of the cell’s broader system for keeping growth under control.