The SLC25A12 gene helps move certain cell materials in and out of mitochondria, the parts of cells that make energy. This supports steady energy use, especially in the brain. If the gene does not work properly, brain cells may not get the energy balance they need, which can contribute to developmental delay, low muscle tone, movement differences, and seizures in some people. This gene plays an important role in early brain development and nerve cell signaling.
What is a gene?
Genes are stretches of DNA that carry instructions cells use to make molecules or guide activities in the body. Some genes provide the directions for producing proteins, which are the active parts of cells. Others mainly regulate when certain processes happen, where they take place, and how much activity occurs. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, and medications. For a deeper look at this topic, you can read more in the LearnHub.
Overview
SLC25A12Gene function
What if the gene works
Inside cells, the SLC25A12 gene helps shuttle key amino acids across the membrane of mitochondria, the parts that make energy. This supports steady energy use and normal brain function, especially in nerve cells.
Risk
What if the gene does not work
More disruptive variants in the SLC25A12 gene can cause a rare early-onset brain condition with developmental delay, low muscle tone, seizures, and reduced myelin, the insulation around nerves. Milder variants may lead to a less severe pattern.
Treatment
What does that mean for your treatment
No treatment or drug choice approach specific to the SLC25A12 gene is currently established. If you carry a pathogenic variant in the SLC25A12 gene, care is guided by your symptoms, such as seizure control and developmental support, rather than by the gene change itself.
Conditions associated with SLC25A12
Gene function
What if the gene works
Your cells use the SLC25A12 gene to keep energy moving where it is needed most, especially in the brain. It makes a transporter in mitochondria, the parts of cells that produce most energy. This helps explain how the SLC25A12 gene supports brain energy use and steady cell function.
The SLC25A12 protein moves aspartate out of mitochondria while bringing glutamate in. This steady exchange lets cells reuse important small molecules during normal metabolism.
This transporter is part of the malate aspartate shuttle (a pathway that moves energy from the cell fluid into mitochondria). By supporting this shuttle, it helps cells make ATP, the main energy source used for everyday tasks.
Its activity rises with calcium signals, which helps cells increase energy flow when they are more active. This is especially useful in nerve cells, where energy needs can change from moment to moment.
What is a variant?
A genetic variant is a slight change in a gene’s DNA sequence. These changes are common and help shape normal differences among people, such as 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 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
Variants in the SLC25A12 gene can change the shape or stability of a transporter in mitochondria, the parts of cells that help make energy, so it moves less aspartate and glutamate across the membrane. This is how variants in the SLC25A12 gene affect function at the cell level. Milder changes may leave some transport activity, while more severe variants can reduce it or stop it. When both gene copies are affected, symptoms often begin earlier and can be more marked.
How variants are linked to conditions
Health conditions linked to variants in the SLC25A12 gene mainly involve a rare inherited neurologic condition. When a person has pathogenic variants in both copies of the SLC25A12 gene, this can cause developmental and epileptic encephalopathy, often with early developmental delay, low muscle tone, seizures, and sometimes changes in brain white matter. Separate studies have explored links with autism, but those findings have not been consistent enough to confirm a clear clinical association.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are widely seen in the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, having a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when more than one gene and environmental factors also play a role. In some situations, though, one well-characterized variant in a particular gene can be 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 SLC25A12 gene. For many living with a disease-causing change in this gene, the main factor is the genetic change itself, while day-to-day symptoms can still vary from one person to another.
Inheritance of SLC25A12 variants
For established SLC25A12-related conditions, how SLC25A12 variants are inherited follows an autosomal recessive pattern. This means a child usually inherits one variant in the SLC25A12 gene from each parent. Parents who each carry one variant are often unaffected, and with each pregnancy there is a 25% chance the child will inherit both altered copies, a 50% chance the child will be a carrier, and a 25% chance the child will inherit neither variant. Because SLC25A12 is on a non-sex chromosome, this pattern is the same for boys and girls.
What does my SLC25A12 result mean for my family?
For families with a disease-causing SLC25A12 result linked to SLC25A12 deficiency, parents are usually healthy carriers, and brothers or sisters may also be affected or be carriers. Close relatives on both sides of the family may carry the same gene change even if they have no symptoms. This can be useful family information when relatives are thinking about testing or planning children.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the SLC25A12 gene, doctors use genetic testing for SLC25A12 variants on a blood or saliva sample. A lab reads the gene's DNA sequence and checks for variants that may help explain symptoms or confirm a diagnosis. Results may show a disease-causing variant, no relevant variant, or an uncertain finding.
When should I consider getting a genetic test?
Genetic testing for the SLC25A12 gene can be worth considering when a child has unexplained early seizures, very low muscle tone, delayed development, or brain scans showing problems with the covering around nerves, especially if similar problems run in the family. It can also help when a relative is known to carry a harmful SLC25A12 change.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it reveals depends on the condition and on the kind of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, also influence how the body functions. For some conditions, particularly those shaped by many genes, genetic information provides context rather than certainty and is best viewed together with other parts of care. In other situations, a genetic result may offer a clear answer. For medication response, genetic results can also help put individual experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, moves it into tissues, or responds to it at its target. This helps explain why the same treatment works well for one person, seems weaker for another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect a person’s response to medicines. It looks at gene and drug patterns to help explain why the same treatment may work differently from one person to another. For many medications, genes can influence how strongly a drug works or how the body handles it. This information can support more informed, individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the SLC25A12 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 adjusted, so questions about side effects, poor treatment response, or other medication concerns are best discussed with your doctor.