The HOGA1 gene helps the liver process part of protein breakdown so oxalate does not build up. When it does not work properly, people can make too much oxalate, which can lead to repeated kidney stones and, less often, kidney problems. This gene plays an important role in keeping certain natural body chemicals in balance. Changes in the HOGA1 gene are linked to primary hyperoxaluria type 3, an inherited condition that often appears in childhood or early adult life.
What is a gene?
A gene is a stretch of DNA that carries instructions your cells use to make molecules or regulate activities in the body. Some genes hold the code for proteins, the parts of cells that do much of the work. Other genes mostly guide when certain processes happen, where they take place, and how strongly they run. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. For a more detailed look at this topic, you can learn more in the LearnHub.
Overview
HOGA1Gene function
What if the gene works
The HOGA1 gene helps liver and kidney cells break down hydroxyproline, a part of collagen. This helps control glyoxylate and keeps oxalate production in balance.
Risk
What if the gene does not work
Variants in the HOGA1 gene can cause primary hyperoxaluria type 3, which often leads to repeated kidney stones and high oxalate in urine. Milder and more severe variants may influence when symptoms begin and how often stones return.
Treatment
What does that mean for your treatment
No HOGA1-specific treatment or drug choice is currently established in clinical guidelines. Care is based on general primary hyperoxaluria management, which may include high fluid intake and medicines such as citrate to help lower kidney stone risk. HOGA1-related primary hyperoxaluria is also being studied in broader oxalate-lowering therapy research, including LDHA-targeted approaches.
Conditions associated with HOGA1
Gene function
What if the gene works
Day to day, the HOGA1 gene helps your cells process hydroxyproline, a natural amino acid released when collagen is broken down. Its protein works inside mitochondria, the parts of cells that handle energy related chemistry. This is part of the body’s normal recycling system and supports steady metabolism.
One of the main roles of the HOGA1 gene is to help complete the breakdown of hydroxyproline from normal collagen turnover. This keeps that metabolic pathway moving in an orderly way.
Inside mitochondria, the HOGA1 gene’s protein splits a small intermediate into pyruvate and glyoxylate. Pyruvate can feed into everyday energy metabolism, while glyoxylate moves into other normal processing steps.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These changes are common and help create normal human diversity, such as differences in appearance, metabolism, or 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 situations, though, a variant can change how a gene functions more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the HOGA1 gene can make the enzyme fold poorly, become unstable, or lose much of its activity, so cells process a protein building block called hydroxyproline less effectively. This can push more of a byproduct called glyoxylate toward oxalate, which helps explain how HOGA1 gene variants affect primary hyperoxaluria type 3. Milder variants may leave some enzyme function, while more severe variants can remove it almost completely and are often linked to earlier or noticeable kidney stone symptoms.
How variants are linked to conditions
Pathogenic variants in the HOGA1 gene cause primary hyperoxaluria type 3, an inherited condition most often linked to repeated kidney stones, especially in childhood. HOGA1 gene variants linked to primary hyperoxaluria type 3 can also be associated with high oxalate in the urine and, less often, calcium deposits in the kidneys. Severity varies widely, and some people have milder symptoms than others.
A variant is not necessarily a diagnosis
Variants in genes are a routine feature of human biology and occur widely across the population. Most do not directly affect health and instead represent normal human variation. For many genes, having a variant associated with a condition points to a possible link rather than a confirmed diagnosis, particularly when several genes and environmental influences contribute. In other situations, a single well understood variant in a particular gene is enough to establish a diagnosis.
Are there things that can increase or change my risk?
For HOGA1, risk is mainly shaped by genetics: primary hyperoxaluria type 3 usually happens when someone inherits changes in both copies of the HOGA1 gene. There is not broad, well-confirmed evidence that specific lifestyle or environmental factors meaningfully change the chance of having this gene-related condition, though dehydration can make kidney stone problems worse in people already living with it.
Inheritance of HOGA1 variants
The HOGA1 inheritance pattern for primary hyperoxaluria type 3 is autosomal recessive. This means a person usually inherits one HOGA1 variant from each parent. Parents who each carry one variant are often unaffected themselves, but with each pregnancy there is a 25% chance their child will inherit both variants and have the condition, a 50% chance the child will be a carrier, and a 25% chance the child will inherit neither variant. This pattern affects sons and daughters equally.
What does my HOGA1 result mean for my family?
Changes in the HOGA1 gene are linked to a kidney stone condition that usually runs in families in a recessive way. For family members, this often means brothers and sisters may also have the condition or be carriers, and parents are usually carriers without having symptoms. Other relatives may also carry the changed gene, especially on the same side of the family.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for HOGA1 variants usually uses a blood or saliva sample, often as part of testing for recurrent kidney stones or primary hyperoxaluria type 3. A lab reads the HOGA1 gene and may also look for missing or extra pieces. Results can confirm a diagnosis, show carrier status, or find no relevant change.
When should I consider getting a genetic test?
Consider HOGA1 genetic testing if someone has repeated kidney stones, especially starting in childhood, high oxalate in the urine, or a family history of the same problem. Testing can help confirm an inherited condition called primary hyperoxaluria type 3.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, but how much it explains varies with the condition and the kind of variant. How your body functions over time is also shaped by many other factors, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is most meaningful when considered alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas such as medication response, genetic results can also help put individual experiences into 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 through the bloodstream, or responds to it at its target. This helps explain why the same treatment may work well for one person, work less well for another, or cause more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medications. It looks at gene and drug patterns to help explain why the same treatment may work differently from one person to another. For many medicines, genes affect both how the body processes a drug and how strong its effects are. This information can support treatment decisions that are more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the HOGA1 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 used, so questions about treatment, side effects, or new symptoms are best discussed with your doctor.
History
Primary hyperoxaluria type 3 was recognized clinically before its genetic cause was clear. In recent decades, awareness of this gene’s role has grown. In 2010, researchers identified variants in the HOGA1 gene as the cause of this form of inherited stone disease, helping separate it from other types of primary hyperoxaluria. Building on this early work, scientists uncovered more about the gene and confirmed that different HOGA1 variants can lead to a similar pattern of illness in affected families. These findings gave doctors a more precise way to classify the condition and improved genetic diagnosis for people with recurrent kidney stones beginning in childhood.