The WDR73 gene helps certain brain and kidney cells keep their shape, divide normally, and stay healthy. When both copies of the WDR73 gene do not work properly, it can cause a rare inherited condition that affects brain development and the kidneys, often leading to developmental delay, a smaller head size, movement or vision problems, and kidney disease. Understanding this gene can help clarify why these brain and kidney changes can appear together in the same person.
What is a gene?
A gene is a piece of DNA that carries instructions cells use to make molecules or guide processes throughout the body. Some genes provide the directions for producing proteins, which are the parts of cells that do much of the work. Others are used mostly to regulate when a process happens, where it happens, and how active it is. Taken together, genes affect how the body grows and works, and they can also influence your response to food, stress, and medications. For a deeper look at this subject, visit the LearnHub.
Overview
WDR73Gene function
What if the gene works
The WDR73 gene helps cells organize their internal skeleton, divide normally, and stay healthy. It is especially important in brain and kidney cells.
Risk
What if the gene does not work
Variants in the WDR73 gene can cause a condition affecting brain development and kidney function, often with developmental delay, small head size, and kidney disease. Milder and more severe variants can influence when symptoms appear and how noticeable they are.
Treatment
What does that mean for your treatment
For pathogenic variants in the WDR73 gene, no treatment or drug choice that is specific to WDR73 is currently established in clinical guidelines. Management is supportive and guided by the person’s symptoms rather than by a WDR73 targeted medicine.
Conditions associated with WDR73
Gene function
What if the gene works
Your cells use the WDR73 gene during everyday upkeep, especially when they are organizing their inner framework and preparing to divide. Its protein supports structures that help cells keep their shape and handle growth in an orderly way. Understanding how the WDR73 gene works helps show how cells stay coordinated during routine renewal.
The WDR73 gene helps organize microtubules, tiny protein tubes that give cells support and shape. This internal framework also helps cells position important parts and move materials where they are needed.
During cell division, the WDR73 gene supports the spindle, the structure that helps pull chromosomes apart. This helps cells separate their DNA in a controlled, orderly way as they make new cells.
What is a variant?
Genetic variants are small changes in a gene’s DNA sequence. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many have no 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
Most disease-causing changes in the WDR73 gene reduce how much working protein a cell can make or leave a shortened, unstable protein. Studies of how variants in the WDR73 gene affect protein function also suggest some single-letter changes alter the protein's shape, weakening its interactions inside the cell. Milder variants may leave some activity. More severe loss-of-function variants often leave little or none and are linked to earlier and more marked brain and kidney involvement.
How variants are linked to conditions
Pathogenic variants in the WDR73 gene cause Galloway-Mowat syndrome type 1. The link between the WDR73 gene and Galloway-Mowat syndrome is well established, and children with this condition often have early kidney disease, small head size, developmental delay, and brain changes seen on scans. In many, the kidney problem appears as steroid-resistant nephrotic syndrome and can progress to kidney failure.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are widespread in the general population. Most do not directly affect health and simply reflect natural variation among people. For many genes, having a variant associated with a condition suggests a possible link rather than a clear diagnosis, especially when several genes and environmental factors are involved. In some situations, though, one well-characterized 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 health risks related to the WDR73 gene. For families with a known WDR73-related condition, risk is mainly shaped by whether a child inherits changed copies of the gene from both parents, and a doctor or genetic counselor can explain personal and family risk.
Inheritance of WDR73 variants
WDR73-related conditions are inherited in an autosomal recessive pattern. This means a person usually inherits one altered copy of the WDR73 gene from each parent, and both parents are typically healthy carriers. When both parents carry a variant in the WDR73 gene, each pregnancy has a 25% chance of the child inheriting both altered copies, a 50% chance of being a carrier, and a 25% chance of inheriting neither variant. In practice, the WDR73 gene inheritance pattern means it can affect children of any sex equally.
What does my WDR73 result mean for my family?
For families with a disease-causing change in the WDR73 gene, parents are usually healthy carriers, and brothers and sisters may also be affected or be carriers even if they seem well. Close relatives may want to learn whether they also carry the family’s WDR73 change, especially if they are planning children. The main family impact is often around future pregnancies and whether other relatives could be carriers.
Genetic information
Genetic testing
How you find out about variants
WDR73 genetic testing looks for changes in the WDR73 gene using a blood sample, saliva sample, or sometimes a cheek swab. A lab reads the gene’s DNA code to check for variants and reports whether one is found, which can help clarify whether your symptoms fit a genetic condition linked to the WDR73 gene.
When should I consider getting a genetic test?
Genetic testing for the WDR73 gene may be worth considering when a child has a combination of early kidney problems, very small head size, developmental delay, or brain changes seen on scans. It can also help when this pattern runs in the family or when doctors suspect Galloway-Mowat syndrome.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but what it can tell you depends on the condition and on the type of variant involved. How the body functions over time is also shaped by many influences, including lifestyle, environment, age, and medical history. In some conditions, especially ones influenced by many genes, genetic information gives context rather than certainty and is most useful when viewed alongside other parts of care. In other situations, a genetic result may give a clear answer. In areas like medication response, genetic results can also help put personal experiences into perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. A treatment that works well for one person may work less well for another, or may cause more side effects, because the body can absorb, break down, or handle drugs differently. These differences are common and are one reason medication response is not always the same from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in genes affect the way people respond to medicines. It focuses on links between genes and medications to understand why the same treatment can work differently in different people. For many drugs, genes can influence how the body handles a medicine or how strong its effects are. This information can help guide more informed, more personalized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the WDR73 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines, so any medication side effects, treatment questions, or general health concerns are best discussed with your doctor.