The DHX38 gene helps cells process RNA, the working copy made from DNA before a protein is built. This gene plays an important role in trimming and joining RNA pieces correctly so cells can follow the right instructions. If the DHX38 gene does not work properly, cells may make faulty RNA messages, and in some people this is linked to inherited retinal disease such as retinitis pigmentosa. This can lead to symptoms like trouble seeing at night and gradual vision loss over time.
What is a gene?
Genes are stretches of DNA that give cells instructions for making molecules or regulating processes in the body. Some genes carry the code for proteins, which do much of the cell’s work. Others mainly guide when certain processes happen, where they occur, and how strongly they are active. Taken together, genes affect how the body develops and works, and they can influence how you respond to food, stress, and medications. You can find more on this topic in the LearnHub.
Overview
DHX38Gene function
What if the gene works
The DHX38 gene helps cells process RNA, the working copy made from DNA. Its protein supports RNA splicing, a step that removes extra segments so cells can make proteins correctly.
Risk
What if the gene does not work
Variants in the DHX38 gene are mainly linked to retinitis pigmentosa, causing night blindness and gradual narrowing of side vision that may later affect central sight. Milder or more severe variants can influence when symptoms start and how vision changes.
Treatment
What does that mean for your treatment
No DHX38-specific treatment or management approach is currently established. The DHX38 gene is being studied in RNA splicing research, but this has not yet led to a gene-directed treatment used in routine care.
Conditions associated with DHX38
Gene function
What if the gene works
Your cells need to edit newly made RNA before they can build proteins. The DHX38 gene helps guide this editing step so genetic instructions are turned into a usable message. Its protein works inside the spliceosome, a cell machine that trims and reconnects RNA pieces.
The DHX38 gene helps the spliceosome remove extra sections from a fresh RNA copy and join the useful parts together. This editing step creates a message your cells can use to make proteins.
Its protein uses cell energy to reshape the spliceosome as RNA editing moves forward. These controlled changes help the process reach later steps in the right order.
This gene supports built-in checks during RNA processing, helping cells use the right cut and join points. That accuracy is a key part of the DHX38 gene’s role in RNA splicing.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help account for normal human diversity, including variation in appearance, metabolism, and 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 significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the DHX38 gene can change the shape or stability of its protein, making it less able to help the cell edit RNA messages before proteins are made. In practical terms, how DHX38 gene variants affect function often comes down to disrupted RNA splicing, the step that trims and reconnects RNA instructions. Milder variants may leave some activity in place, while more severe variants can sharply reduce protein levels or weaken its links with other splicing proteins.
How variants are linked to conditions
Pathogenic variants in the DHX38 gene are linked to retinitis pigmentosa, so DHX38 gene retinitis pigmentosa is the main established association in human genetics. This inherited eye condition can lead to trouble seeing at night, followed by gradual loss of side vision. Reported cases are rare, and many follow a pattern where both copies of the gene carry a disease-causing variant.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are common throughout the general population. Most have no direct effect on health and simply 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 more than one gene and environmental factors also contribute. In some cases, though, a single well characterized variant in a specific gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There isn't yet broadly confirmed evidence on specific factors that increase or reduce risk related to the DHX38 gene. For many living with a DHX38 gene change, risk depends mainly on the exact change in the gene and whether one or both copies are affected, rather than on lifestyle or environmental factors.
Inheritance of DHX38 variants
DHX38 gene inheritance is most often described as autosomal recessive for the retinal condition linked to this gene. This means a person usually inherits one DHX38 gene variant from each parent, and parents who each carry one variant are often unaffected themselves. When both parents are carriers, each pregnancy has a 25% chance that 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 altered copy.
What does my DHX38 result mean for my family?
For families with a disease-causing change in the DHX38 gene, the condition is usually passed down in a recessive way. This often means parents are healthy carriers, and brothers, sisters, and other close relatives could also be carriers or, less often, be affected if they inherited two changed copies. Because of that, relatives may want to learn whether the same DHX38 change runs in the family.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a change in the DHX38 gene, doctors use DHX38 genetic testing on a blood or saliva sample. A lab reads the gene’s DNA code and compares it with the usual sequence to identify variants and classify them as benign, uncertain, or disease causing.
When should I consider getting a genetic test?
Consider genetic testing if you or close relatives have unexplained night blindness, tunnel vision, or an inherited eye condition that runs in the family, especially one known medically as retinitis pigmentosa. Testing can also help when a relative is known to carry a disease-causing change in the DHX38 gene.
A genetic result is only one part of your health story
A genetic test result can provide useful insight, but how much it explains depends on the condition and the kind of variant involved. Over time, many factors, including age, lifestyle, environment, and medical history, affect how the body functions. For 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 can give a clear answer. In areas like medication response, these results can help place a person’s experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in genes can change how the body absorbs, breaks down, or moves a drug, so the same treatment may work better for one person than for another. These inherited differences are common and can influence how much benefit someone gets from a medication or how sensitive they are to side effects.
What is Pharmacogenetics?
Pharmacogenetics examines the way inherited genetic differences affect how people respond to medicines. It focuses on links between genes and medications to help explain why the same treatment can have different effects in different people. For many drugs, genes influence both how strongly a medicine works and how the body handles it. This information can support more personalized and better informed treatment choices. More detail on this topic is available in the LearnHub.
Drugs influenced by the DHX38 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines. If you have side effects, trouble with a treatment, or questions about your medicines and overall health, discuss them with your doctor or pharmacist.
History
DHX38 entered the genetics literature as the human counterpart of a yeast gene involved in RNA splicing, the step cells use to edit RNA before making proteins. In recent decades, awareness of this gene’s role has grown as researchers connected it more clearly to the cell’s splicing machinery. Building on this early work, scientists later identified variants in the DHX38 gene in some families with inherited retinal disease, especially retinitis pigmentosa. That finding shifted DHX38 from a largely laboratory focused gene to one with clear clinical relevance. The way this gene was viewed has shifted over time, from a basic cell biology finding to part of the modern picture of inherited eye conditions.