The ANLN gene gives cells instructions for a protein that helps them keep their shape and separate properly during cell division. This gene plays an important role in the kidney’s filtering cells, which need a stable internal structure to work well. If the ANLN gene does not work properly, some cells can become unstable or divide in an abnormal way. Certain inherited variants are linked to a kidney condition that scars parts of the filters, which can cause protein in the urine and reduced kidney function.
What is a gene?
Genes are sections of DNA that carry instructions cells use to make molecules or regulate processes throughout the body. Some genes hold the directions for producing proteins, which are the parts of cells that do much of the work. Other genes mainly guide when certain processes happen, where they take place, and how strongly they occur. Taken together, genes affect how the body develops and works, and they can also shape how you respond to food, stress, or medications. To go into this topic in more detail, you can find more in the LearnHub.
Overview
ANLNGene function
What if the gene works
The ANLN gene helps cells keep their shape and divide properly. Its protein helps build the ring that pinches one cell into two during cell division.
Risk
What if the gene does not work
Variants in the ANLN gene can cause inherited focal segmental glomerulosclerosis, a kidney condition with protein in the urine and declining kidney function. Milder and more severe variants may differ in age at onset and how much kidney damage develops.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently guided specifically by pathogenic or loss-of-function variants in the ANLN gene. The ANLN gene is being studied mainly as a cancer biomarker and possible drug target, especially when it is overactive in tumors, rather than as a gene with an established treatment pathway.
Conditions associated with ANLN
Gene function
What if the gene works
When one cell becomes two, many parts have to move together in a precise way. The ANLN gene helps coordinate this late stage of cell division by acting as a steady connector inside the cell. Understanding what the ANLN gene does during cell division helps explain how cells split in a controlled, orderly way.
During the last stage of cell division, the ANLN gene helps the cell pinch in at the middle. Its protein gathers and steadies the machinery that creates the dividing groove, so the split stays controlled.
ANLN helps organize actin and myosin (protein fibers that let cells tighten and change shape) at the division site. This creates a firm belt-like ring that tightens as one cell becomes two.
The ANLN gene also helps connect that tightening ring to the cell membrane and other support proteins. This link keeps the division site aligned and stable until the two new cells are nearly separated.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some instances, though, a variant can change how a gene works to a greater extent and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the ANLN gene can change the shape, stability, or interactions of the anillin protein, altering how it links the cell’s internal support fibers to other proteins. In kidney filtering cells, this disruption helps explain how ANLN gene variants affect protein function in a kidney scarring condition called focal segmental glomerulosclerosis. Milder variants may partly change protein activity, while more severe variants can cause a larger effect and are often linked to earlier or more marked kidney disease.
How variants are linked to conditions
Pathogenic variants in the ANLN gene can cause an inherited form of focal segmental glomerulosclerosis, so ANLN gene variants are most clearly linked to kidney disease. This condition often shows up as protein in the urine, swelling, and gradually reduced kidney function, although the course can vary from person to person. Outside this kidney association, other ANLN findings are mainly research observations rather than established inherited diagnoses.
A variant is not necessarily a diagnosis
Variants in genes are common in the general population and are a normal feature of human biology. Most do not have a direct effect on health and instead 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 multiple genes and environmental factors also contribute. In some situations, though, a single 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 risk related to the ANLN gene. If ANLN is part of your personal or family health history, a doctor or genetic counselor can help explain what it may mean for you.
Inheritance of ANLN variants
For families asking how variants of the ANLN gene are inherited, the best-established pattern is autosomal dominant. This means a parent with a disease-causing ANLN variant can pass it to a child with a 50% chance in each pregnancy, whether the child is a boy or a girl. In practice, this pattern has been described for ANLN-related kidney disease, including some families with focal segmental glomerulosclerosis.
What does my ANLN result mean for my family?
Some changes in the ANLN gene have been linked to an inherited kidney condition that can run in families in a dominant pattern, meaning close relatives such as a parent, brother, sister, or child may also carry the same gene change. For many families, this means first-degree relatives could also have a chance of developing kidney problems or having the result without symptoms yet. In some families, the change may be new rather than inherited from a parent.
Genetic information
Genetic testing
How you find out about variants
To look for variants in the ANLN gene, doctors can use ANLN gene genetic testing on a blood or saliva sample. A lab reads the gene’s DNA code to check for changes and compares them with known findings, which can help confirm whether an ANLN-related kidney condition is present or running in a family.
When should I consider getting a genetic test?
Consider ANLN testing if you or close relatives have an inherited form of kidney scarring disease, especially focal segmental glomerulosclerosis (FSGS), unexplained protein in the urine, or kidney failure at a young age. Testing can help clarify whether ANLN is part of the cause and whether family members may also carry the change.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it explains varies based on the condition and the type of variant involved. Over time, many factors influence how the body works, including lifestyle, environment, age, and medical history. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most useful when considered 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 individual experiences into perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds to medicines. Some people break down a drug more quickly, while others process it more slowly or are more sensitive to its effects. This helps explain why the same treatment may work well for one person but less well for another, or why side effects can differ. These differences are common and are one part of how doctors understand medication response.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences shape a person’s response to medicines. By looking at the relationship between genes and drugs, it helps explain why the same treatment may work differently from one person to another. For many medications, genes can affect both how strongly a drug works and how the body handles it. This information can support more informed, more individualized treatment decisions. More on this topic is available in the LearnHub.
Drugs influenced by the ANLN gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or how well they work, so any concerns about a new medicine, side effects, or treatment changes are best discussed with your doctor.
History
ANLN entered the scientific literature through cell division research in the 1990s, when researchers studying how cells separate identified anillin as an important protein at the cell’s dividing edge. Initially understood only through visible traits, later recognized as tied to a specific gene, this work linked ANLN to the machinery that helps one cell become two. From these first observations, research expanded steadily as improved imaging and genetic methods clarified where ANLN is active during cell division. In the 2000s and 2010s, interest grew further as studies connected changes in ANLN activity with several cancers. These historical steps shaped today’s understanding of ANLN in human biology and disease.