The LGR5 gene helps control a key cell signaling system that supports stem cells, the cells that replace worn out cells in tissues like the intestine and skin. This gene plays an important role in how these tissues grow, repair, and stay healthy. If the gene does not work properly, normal development and tissue renewal may be affected, and rare inherited variants have been linked to intestinal problems and other developmental differences.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or manage activities in the body. Some genes provide the directions for producing proteins, which are the parts of cells that do much of the work. Others mainly regulate when certain processes happen, where they happen, and how active they are. Taken together, genes affect how your body grows and functions, and they may also influence how you respond to food, stress, and medications. For a deeper look at this topic, you can find more in the LearnHub.
Overview
LGR5Gene function
What if the gene works
The LGR5 gene helps certain stem cells grow and renew tissues. It is especially active in the lining of the gut and in hair follicles, where it supports ongoing repair and replacement of cells.
Risk
What if the gene does not work
Milder to more severe variants in the LGR5 gene can reduce signaling that helps stem cells keep renewing. This may impair the normal upkeep of tissues that renew often.
Treatment
What does that mean for your treatment
No treatment or management approach specifically tied to pathogenic variants in the LGR5 gene is currently established in clinical guidelines. In research, the LGR5 gene is being studied as a cancer biomarker and possible drug target, especially in colorectal and other epithelial cancers.
Gene function
What if the gene works
Your body uses the LGR5 gene most in tissues that renew themselves often, especially the gut. It helps a small group of stem cells read growth signals so they can replace worn out cells in an organized way. This steady cell turnover helps keep tissue surfaces healthy from day to day.
LGR5 sits on the surface of certain stem cells and binds helper proteins called R-spondins. This boosts important growth messages that help cells stay active and ready to renew tissue.
In tissues that regularly replace older cells, LGR5 helps stem cells keep their ability to make fresh cells. This is a key part of what the LGR5 gene does in the body, especially in the intestine.
By strengthening renewal signals, LGR5 supports the normal upkeep of the gut lining, parts of the stomach, and hair follicles. It helps these tissues replace older cells in a steady, controlled way.
What is a variant?
A genetic variant is a minor difference in the DNA sequence of a gene. These changes are common and help account for normal human diversity, such as differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. In some situations, 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
Variants in the LGR5 gene can weaken this cell surface receptor, often by altering its shape, stability, or delivery to the cell membrane. This helps explain how variants in the LGR5 gene affect cell signaling, especially by reducing the response to R-spondin and lowering Wnt pathway activity, a key growth control signal. Milder variants may leave some signaling intact, while more severe loss of function variants can truncate the protein or stop it from working almost completely.
How variants are linked to conditions
The LGR5 gene does not yet have a broadly confirmed link to a specific health condition, though research on how LGR5 gene variants are linked to conditions is still developing. If you carry a variant in the LGR5 gene, your doctor or genetic counselor can interpret it alongside your personal and family history.
A variant is not necessarily a diagnosis
Gene variants are a usual part of human biology and are common throughout the general population. Most have no 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 more than one gene 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 LGR5 gene. If LGR5 is part of your genetic results and you are concerned about what it means for you or your family, a doctor or genetic counselor can help put it in context.
Inheritance of LGR5 variants
LGR5-related conditions that have been clearly described in families follow an autosomal recessive inheritance pattern. This means a child inherits one altered copy of the LGR5 gene from each parent, and parents who each carry one variant usually do not have the condition themselves. When both parents are carriers, each pregnancy has a 25% chance that the child will inherit both altered copies, a 50% chance the child will be a carrier, and a 25% chance the child will inherit neither altered copy. This is the established LGR5 gene inheritance pattern for known disease-causing variants.
What does my LGR5 result mean for my family?
There isn’t yet a broadly confirmed inheritance pattern tied to a specific health condition for LGR5, though this understanding can change as research develops. If you have a specific LGR5 result and questions about what it could mean for your family, a doctor or genetic counselor can explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
To find out about variants in the LGR5 gene, genetic testing for LGR5 variants usually analyzes DNA from a blood sample, saliva, or a cheek swab. Labs read the gene's code and may also look for missing or extra pieces. Results can show a benign variant, a variant of uncertain significance, or a pathogenic variant.
When should I consider getting a genetic test?
There isn't yet a broadly established medical reason to test the LGR5 gene on its own. Testing is usually considered in the bigger picture, with a doctor or genetic counselor looking at your symptoms, health history, and family history.
A genetic result is only one part of your health story
Genetic findings can offer useful insight, but how much they reveal depends on the condition and on the type of variant involved. Many other factors, including lifestyle, environment, age, and medical history, also 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 may give a clear answer. In areas such as 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 your body responds to medicines. Small differences in genes can change how a drug is absorbed, broken down, moved through the body, or how strongly it acts on its target. This helps explain why the same medication may work well for one person, seem weaker in another, or cause more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect a person’s response to medications. It looks at gene and drug patterns to help explain why the same treatment works differently from one person to another. For many medicines, genes can influence how strongly a drug works or how the body handles it. This information can support more informed and more personalized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the LGR5 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice, so questions about medicines, side effects, or treatment changes are best discussed with your doctor. LGR5 has been studied in cancer research because cells with higher LGR5 activity may respond differently to some cancer treatments, but this is not part of routine prescribing.
History
The LGR5 gene became widely important when researchers linked it to adult stem cells in the 2000s, especially in the intestine. In 2007, scientists showed that cells carrying the LGR5 gene could renew intestinal tissue over time, a finding that changed stem cell research. Building on this early work, scientists uncovered more about the gene by using LGR5 as a marker, meaning a signpost that helps identify certain stem cells in tissues such as the gut, stomach, and hair follicle. This work helped launch modern organoid research, where tiny tissue models are grown in the lab from stem cells. Over time, the LGR5 gene also became part of cancer research because some tumors contain cells with similar features. These historical steps shaped today’s understanding of tissue renewal and regenerative medicine.