The NUP88 gene helps build tiny gateways that control traffic into and out of a cell's nucleus, where DNA is stored. The protein made by this gene helps your cells move important signals and instructions to the right place. If it does not work properly, early development can be disrupted, and some babies may have reduced movement before birth, joint contractures, and other developmental differences. Pathogenic variants in both copies of the NUP88 gene can cause a rare inherited condition.
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 directions for building proteins, the active parts of cells. Others mainly help control when certain processes happen, where they happen, and how strongly they run. Taken together, genes affect how the body develops and works, and they can also shape how you respond to food, stress, or medications. For a more in depth look at this topic, you can find more in the LearnHub.
Overview
NUP88Gene function
What if the gene works
The NUP88 gene helps form the channels that move proteins and other molecules in and out of a cell’s nucleus. This supports normal cell growth, communication, and division.
Risk
What if the gene does not work
More disruptive variants in the NUP88 gene can cause a severe condition with reduced fetal movement, joint contractures, and breathing problems at birth; milder variants may lead to a wider range of severity.
Treatment
What does that mean for your treatment
No treatment or management approach tailored to the NUP88 gene is currently established for people with a pathogenic variant in this gene. Care is supportive and based on the person's symptoms, rather than on a drug choice linked to NUP88. Separately, NUP88 is being studied in cancer research as a possible biomarker and drug target when it is overactive, but this does not currently guide treatment for inherited NUP88-associated conditions.
Conditions associated with NUP88
Gene function
What if the gene works
Every cell needs a steady flow of instructions and proteins between the nucleus, where DNA is stored, and the rest of the cell. The NUP88 gene helps keep that traffic moving through tiny gateways called nuclear pores. This supports normal cell communication and routine cell activity.
The NUP88 gene helps form and support part of the nuclear pore, the opening that links the nucleus with the rest of the cell. This gives cells a stable route for everyday traffic of important materials.
Inside your cells, its protein helps guide selected cargo through nuclear pores. This is part of how the NUP88 gene helps move proteins in and out of the nucleus during normal cell activity.
Its protein works with other nuclear pore proteins on the outer side of the gateway. Together they help transport carriers dock at the pore and pass cargo along in an orderly way.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help shape normal human diversity, including variation in appearance, metabolism, and how the body responds to environmental influences. Many have no noticeable effect and are simply part of natural genetic variation. In some cases, though, a variant changes 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 NUP88 gene can make the protein unstable or misshapen, and may weaken its links to other proteins in the cell's gateway around the nucleus. This is how NUP88 gene variants affect protein function: milder changes may leave some activity, while more disruptive variants can greatly reduce it and are often linked to earlier, more severe symptoms.
How variants are linked to conditions
Pathogenic variants in the NUP88 gene can cause a rare inherited condition marked by very little movement before birth, often described as fetal akinesia deformation sequence. People with this diagnosis may also have joint contractures, also called arthrogryposis, along with muscle weakness and breathing problems around birth. In NUP88 gene variants linked to conditions, the clearest evidence involves rare variants affecting both copies of the gene.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a normal feature of human biology. Most do not directly affect health and simply reflect natural variation among people. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences are part of the picture. There are cases, though, where 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 risk related to the NUP88 gene. In families with a known NUP88 change, risk is mainly shaped by whether that change is inherited, and a doctor or genetic counselor can help explain personal and family risk.
Inheritance of NUP88 variants
For families asking about the NUP88 inheritance pattern, NUP88-related conditions are inherited in an autosomal recessive way. This means a child usually needs to inherit two altered copies of the NUP88 gene, one from each parent, to be affected. Parents who each carry one NUP88 variant are usually unaffected carriers. With each pregnancy, two carrier parents have a 25% chance of having an affected child, a 50% chance of having a child who is a carrier, and a 25% chance of having a child who inherits neither variant.
What does my NUP88 result mean for my family?
For families with a disease-causing change in the NUP88 gene, the pattern is recessive, which usually means parents can be healthy carriers while an affected child has inherited one changed copy from each parent. Brothers and sisters may also be affected or may be carriers, and close relatives could be carriers too. This can matter for family planning and for understanding chances in future pregnancies.
Genetic information
Genetic testing
How you find out about variants
NUP88 genetic testing uses a blood or saliva sample to read the NUP88 gene and look for variants. Results may show a pathogenic variant that helps confirm a diagnosis, a benign variant, or a finding that is still being clarified.
When should I consider getting a genetic test?
Consider genetic testing for the NUP88 gene when a baby or fetus has very reduced movement before birth, tight joints at birth, or similar findings, especially if this has happened in the family before. Testing can help confirm whether NUP88 is the cause and clarify the chance of it happening again in another pregnancy.
A genetic result is only one part of your health story
A genetic result may provide valuable insight, but how informative it is varies by the condition and the specific type of variant. How the body functions over time is also shaped by many other influences, including lifestyle, environment, age, and medical history. In some conditions, especially those affected by many genes, genetic information provides context rather than certainty and is most useful when considered together with other parts of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, genetic results can help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. One person may break down a drug more slowly, while another may process it faster, which can change how much of the medicine reaches the body and for how long. These differences are common and can influence how well a treatment works or how likely someone is to notice side effects. Medication response also depends on other factors, including age, liver and kidney function, and other medicines being taken.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect the way a person responds to medications. It looks at gene drug patterns to help explain why the same treatment may work differently in different people. For many medicines, genes influence either how strongly a drug works or how the body processes it. This information can support treatment decisions that are more informed and more individualized. To explore this subject in more detail, you can learn more in the LearnHub.
Drugs influenced by the NUP88 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choices. If you have questions about medicines, side effects, or a health condition linked to this gene, talk with your doctor or pharmacist, especially before starting or changing treatment.
History
NUP88 entered medical genetics more recently than many genes that became household names. Initially understood only through visible traits, later recognized as tied to a specific gene, it was identified during studies of the nuclear pore, the cell structure that controls traffic in and out of the nucleus. From these first observations, research expanded steadily as scientists mapped the gene and clarified the role of its protein. Years later, sequencing studies linked harmful variants in the NUP88 gene to a rare inherited condition affecting development and movement before birth. Over time, descriptions became more precise as additional families were reported. This history is mainly a story of steady laboratory discovery that improved diagnosis for affected families.