The CEP55 gene helps cells complete the final step of cell division, when one cell separates into two new cells. This gene plays an important role in early growth and development, especially in tissues that are rapidly forming before birth. If the gene does not work properly, cells may not split as they should, which can disrupt development and lead to rare inherited conditions that affect the brain and other organs.
What is a gene?
Genes are stretches of DNA that hold instructions 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 the body grows and works, and they can also influence how you respond to food, stress, or medicines. For a deeper look at this topic, you can find more in the LearnHub.
Overview
CEP55Gene function
What if the gene works
The CEP55 gene helps cells finish dividing. Its protein guides the final separation of two new cells, which supports normal growth and tissue repair.
Risk
What if the gene does not work
Milder and more severe variants in the CEP55 gene can cause a rare condition with major brain development problems and often kidney changes, with effects ranging from pregnancy loss to profound developmental impairment in babies born alive.
Treatment
What does that mean for your treatment
No treatment or management approach specific to the CEP55 gene is currently established in clinical guidelines for people with pathogenic or loss-of-function variants in the CEP55 gene. The CEP55 gene is also being studied in cancer research as a possible prognostic marker and drug target, but this has not led to established treatment choices for inherited CEP55-related conditions.
Conditions associated with CEP55
Gene function
What if the gene works
Every day, your body replaces worn out cells in the skin, blood, and gut lining. During that process, CEP55 helps cells complete the last step of cell division, when one cell finishes becoming two. Its work keeps routine cell renewal organized across many tissues.
During the last step of cell division, CEP55 helps two new cells separate completely. It gathers at the thin bridge between them and supports the final cut that leaves each cell on its own.
CEP55 acts like a docking point at the division bridge. It brings in other cell proteins that tighten and seal the membrane so the split finishes in a controlled way.
By coordinating where and when the bridge is cut, CEP55 supports smooth cell turnover. This helps tissues replace everyday cells in a steady, organized way.
What is a variant?
A genetic variant is a slight difference in the DNA sequence within a gene. These differences are common and help shape normal human variation, including traits such as appearance, metabolism, and the way the body reacts to environmental influences. Many do not have any noticeable effect and are simply part of natural genetic diversity. At times, though, a variant changes how a gene works more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
CEP55 gene variants can lower working protein levels or change the protein's shape, which may disrupt the last step of cell division, when one cell separates into two, and can also affect cilia, the tiny structures cells use to sense signals. Milder variants may leave some activity, while more severe variants can lead to little or no functional protein. When both copies carry severe variants, conditions linked to the CEP55 gene often start earlier and affect more body systems.
How variants are linked to conditions
Pathogenic variants in the CEP55 gene are linked to MARCH syndrome, a rare inherited condition with major problems in brain and kidney development before birth. Affected pregnancies may show severe brain differences, low amniotic fluid, and kidney changes, and the diagnosis is usually confirmed when both copies of the gene carry a pathogenic variant.
A variant is not necessarily a diagnosis
Variants in DNA are a routine part of human biology and are widespread in the general population. Most have no direct effect on health and simply contribute to normal human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a certain diagnosis, especially when several genes and environmental factors are involved. In some situations, though, a single well characterized variant in a specific 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 health risks related to the CEP55 gene. If a CEP55 change is found, personal risk usually depends more on the exact gene change and family history than on known lifestyle or environmental factors.
Inheritance of CEP55 variants
CEP55-related conditions are inherited in an autosomal recessive pattern. In practical terms, how CEP55 gene variants are inherited usually means a child receives one altered copy of the CEP55 gene from each parent. When both parents carry one variant, each pregnancy has a 25% chance of being affected, a 50% chance of producing a child who is a carrier, and a 25% chance of producing a child who inherits neither variant. Because the CEP55 gene is on chromosome 10, this pattern is the same for boys and girls.
What does my CEP55 result mean for my family?
For families with a disease-causing change in the CEP55 gene, the pattern is recessive, which means close relatives may also be carriers even if they are healthy. Brothers and sisters could also be affected or be carriers, depending on the gene changes they inherited. This can matter for family planning and for relatives who want to understand their own chance of carrying the same change.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the CEP55 gene, clinicians use CEP55 genetic testing on a blood or saliva sample. A lab reads the DNA code in the CEP55 gene and compares it with the usual sequence to look for variants that may help explain a diagnosis or clarify family findings.
When should I consider getting a genetic test?
Testing for CEP55 may be worth considering if a baby has a pattern of severe brain, kidney, or growth problems, especially when similar findings happened in a previous pregnancy. It can also help if a close relative is known to carry a CEP55 variant or has this rare inherited condition.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but how much it reveals depends on the condition and on the type of variant involved. Over time, the way the body works is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best considered alongside 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 perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Some people break down a drug faster or more slowly, while others may be more or less sensitive to its effects. This helps explain why the same medication can work well for one person, seem less helpful for 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. By looking at links between genes and drugs, it helps explain why the same treatment may work differently from one person to another. For many medicines, genes can influence how strong a drug’s effects are or how the body handles it. This information can support treatment decisions that are more informed and more individualized. More about this topic is available in the LearnHub.
Drugs influenced by the CEP55 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice or response, so questions about side effects, new symptoms, or how medicines may affect you are best discussed with your doctor.