The NDUFA8 gene helps mitochondria, the energy making parts of cells, power organs that need a lot of energy, especially the brain, heart, and muscles. This gene helps your body turn food into usable energy through complex I, a key step in cell energy production. If both copies do not work properly, a person can develop a mitochondrial condition that may cause low muscle tone, feeding problems, developmental delay, seizures, or heart and breathing problems. Effects can vary, but symptoms often begin early in life.
What is a gene?
Genes are pieces of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes provide the directions for producing proteins, which are the functional parts of cells. Others mostly guide when specific processes happen, where they take place, and how active they are. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, or medicines. For a deeper look at this topic, you can read more in the LearnHub.
Overview
NDUFA8Gene function
What if the gene works
The NDUFA8 gene helps build a part of mitochondria, the cells’ energy makers. It supports complex I, a step cells use to turn food into usable energy.
Risk
What if the gene does not work
Variants in the NDUFA8 gene can reduce the cell's energy supply and cause complex I deficiency, often with Leigh syndrome. Symptoms may range from milder to more severe and can include developmental delay, low muscle tone, and breathing difficulties.
Treatment
What does that mean for your treatment
No NDUFA8-specific treatment or drug choice is currently established for pathogenic variants in the NDUFA8 gene; management is supportive and based on a person’s symptoms rather than a gene-directed therapy.
Gene function
What if the gene works
Inside mitochondria, your cells use the NDUFA8 gene as part of the system that turns food into usable energy. Its protein joins complex I, an early station in the energy chain inside these cell compartments. This is part of how the NDUFA8 gene helps mitochondria make energy for everyday cell work.
The NDUFA8 protein is one small part of complex I in the inner membrane of mitochondria. In this position, it supports the first major step in the process that moves electrons through the cell’s energy chain.
This protein helps complex I keep a stable shape within the mitochondrial membrane. That steady structure supports smooth teamwork among the many parts of the complex during energy production.
As part of complex I, the NDUFA8 protein supports the step that helps build a proton gradient (a small difference in charge across the membrane). Your cells then use that stored energy to make ATP, the main fuel they use day to day.
What is a variant?
A genetic variant is a small change in the DNA sequence of a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not cause any noticeable effect and are simply part of natural genetic variation. In some cases, though, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the NDUFA8 gene can change the protein's shape or stability, making it harder for complex I, one of the cell's energy making parts, to assemble and work. Milder changes may leave some activity, while more severe variants can cause little or no working protein and a bigger drop in energy production. Variants in the NDUFA8 gene affecting mitochondrial complex I function are often linked to earlier and more marked mitochondrial disease when the loss of function is greater.
How variants are linked to conditions
Pathogenic variants in the NDUFA8 gene cause a rare inherited mitochondrial condition called isolated complex I deficiency. This often starts in infancy or childhood and may be diagnosed as Leigh syndrome or a closely related neurological condition. Reported features include developmental delay, low muscle tone, feeding problems, and periods of worsening during illness. Current evidence on how variants in the NDUFA8 gene are linked to disease mainly centers on this diagnosis.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of being human and are common throughout the population. Most have no direct impact on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible connection rather than a definite diagnosis, especially when more than one gene and environmental factors contribute. In some instances, 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 NDUFA8 gene. In families with a disease-causing change in NDUFA8, risk is mainly shaped by the inherited variant itself rather than everyday lifestyle factors, and a doctor or genetic counselor can help explain personal and family risk.
Inheritance of NDUFA8 variants
NDUFA8-related conditions are inherited in an autosomal recessive pattern. This means a person usually inherits one changed copy of the NDUFA8 gene from each parent, and parents who each carry one variant are typically unaffected carriers. When both parents are carriers, each pregnancy has a 25% chance of the child inheriting both variants, a 50% chance of being a carrier, and a 25% chance of inheriting neither variant. In practical terms, how variants of the NDUFA8 gene are inherited usually follows the same pattern seen when two healthy carriers have a child together.
What does my NDUFA8 result mean for my family?
For families with a disease-causing change in the NDUFA8 gene, the pattern is typically recessive, which means close relatives may also carry the same gene change without having symptoms. Brothers and sisters could have the condition or be carriers, and other family members may also carry it. This can matter for family planning and for relatives who want to understand their own chances of being affected or passing it on.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the NDUFA8 gene, doctors use genetic testing on blood, saliva, or a cheek swab. NDUFA8 genetic testing usually uses sequencing to look for spelling changes, and some labs also check for missing or extra pieces of DNA, helping show whether a variant may explain symptoms.
When should I consider getting a genetic test?
Genetic testing for the NDUFA8 gene may be worth considering when someone has signs of a rare inherited condition that affects how cells make energy, such as developmental delay, muscle weakness, seizures, or repeated high lactic acid levels. It can also help when there is a family history of unexplained early brain illness or a known NDUFA8 variant.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it reveals varies with the condition and the kind of variant involved. How the body works over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced 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 also help put personal experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Some people break down or handle a drug differently, so the same treatment may work better for one person, have less effect in another, or cause more side effects. These differences are common and are one reason medication response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes affect the way they respond to medicines. It studies links between genes and drugs to help explain why the same treatment can work differently in different people. With many medications, genes can influence how strongly a drug works or how the body processes it. This information can support treatment choices that are more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the NDUFA8 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 they work, so any concerns about treatment, side effects, or your health are best discussed with your doctor.