The DGAT2 gene helps cells make triglycerides, the main form of stored fat. This gene plays an important role in storing energy safely and supporting normal fat tissue, liver function, and skin health. If it does not work properly, the body may struggle to handle fat normally, which can lead to changes in body fat, skin problems, and other metabolic changes.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or regulate processes in the body. Some genes carry the information needed to produce proteins, which are the parts of cells that do the work. Others mainly help direct when certain processes happen, where they take place, and how strongly they run. Taken together, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. For a more detailed look at this topic, you can find additional information in the LearnHub.
Overview
DGAT2Gene function
What if the gene works
The DGAT2 gene helps cells make triglycerides, the main form of stored fat.
This supports energy storage and also contributes to normal skin oils and the skin barrier.
Risk
What if the gene does not work
If the DGAT2 gene does not work well, cells may struggle to make triglycerides, a main stored fat. Milder and more severe variants can reduce this step to different degrees, changing fat droplet storage and some skin lipid production.
Treatment
What does that mean for your treatment
For people with a pathogenic or loss-of-function variant in the DGAT2 gene, no treatment or drug choice approach tied to the DGAT2 gene is currently established in clinical guidelines. The DGAT2 gene is being studied as a drug target in fatty liver and other metabolic conditions.
Conditions associated with DGAT2
Gene function
What if the gene works
Your cells need a steady way to turn extra fat into a form they can safely store and later use. The DGAT2 gene supports that process by helping make triglycerides, the main fat stored in the body. When it works normally, cells can package fat into small droplets and manage energy more smoothly.
The DGAT2 gene helps cells complete the last step of making triglycerides, the body’s main storage fat. It joins smaller fat building blocks into a form that can be stored efficiently.
Once triglycerides are made, this gene helps cells place them into tiny fat droplets. That allows fat to be stored in an organized way instead of floating freely inside the cell.
By helping make triglycerides and store fat in cells, the DGAT2 gene contributes to a steady energy reserve. This gives tissues a practical way to save extra fuel for times when the body needs it.
What is a variant?
A genetic variant is a slight change in the DNA sequence of a gene. These changes are common and help account for normal differences among people, such as appearance, metabolism, or how the body responds to environmental influences. Many variants have no 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
Descriptions of how variants in the DGAT2 gene affect protein function usually focus on reduced enzyme activity or an unstable protein. Some variants change the enzyme’s shape, weaken its attachment to cell membranes, or make it break down sooner, so cells make less triglyceride. Milder single-letter changes may leave some activity, while more disruptive variants that shorten the protein or scramble its instructions can greatly reduce the protein or stop it from being made.
How variants are linked to conditions
At this point, the DGAT2 gene does not have a broadly confirmed link to one specific health condition, although research on DGAT2 gene variants and health conditions is still developing. Anyone with a confirmed DGAT2-related diagnosis should follow advice from their doctor or genetic counselor rather than general summaries online.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widespread in the general population. Most do not have a direct effect on health and simply reflect natural variation among people. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors play a role. 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 is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the DGAT2 gene. For families with a known DGAT2 change, personal risk is mainly shaped by the exact variant and whether it is inherited from one or both parents.
Inheritance of DGAT2 variants
DGAT2-related conditions are inherited in an autosomal recessive pattern. In practical terms, how DGAT2 variants are inherited usually means a person has to receive one altered copy of the DGAT2 gene from each parent to have the condition. Parents who each carry one variant are often healthy themselves, and with each pregnancy there is a 25% chance the child will inherit both variants, a 50% chance the child will be a carrier, and a 25% chance the child will inherit neither variant. This inheritance pattern applies equally to boys and girls.
What does my DGAT2 result mean for my family?
For DGAT2, family meaning is usually discussed in the setting of a rare inherited condition passed down in a recessive pattern. This often means parents are healthy carriers, brothers and sisters may also be affected or be carriers, and other relatives may carry the same gene change without knowing it. Children of someone with a DGAT2-related condition will usually be carriers unless the other parent also carries a DGAT2 change.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the DGAT2 gene, doctors use DGAT2 genetic testing on a blood or saliva sample. The lab reads the gene’s DNA code and compares it with the usual sequence to find changes, which may be reported as benign, uncertain, or linked to a condition related to the DGAT2 gene.
When should I consider getting a genetic test?
Testing for changes in the DGAT2 gene may be considered when a baby or child has very dry, thick, scaly skin from birth, especially if others in the family are affected or the parents are blood relatives. A DGAT2 test can help show whether this rare inherited skin condition is the cause.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but what it can tell you 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. In some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is most useful when viewed alongside other parts of care. In other situations, a genetic result may offer a clear answer. In areas like 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. Some people break down a drug more slowly or more quickly, while others may be more or less sensitive to its effects. This helps explain why the same treatment can work well for one person, seem less effective for another, or cause more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape the way people respond to medications. It looks at connections between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes can affect both how much effect a drug has and how the body handles it. This information can help guide more informed and individualized treatment decisions. To explore this topic in greater detail, you can learn more in the LearnHub.
Drugs influenced by the DGAT2 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so questions about side effects, new symptoms, or whether a treatment is right for you are best discussed with your doctor.
History
The DGAT2 gene entered the scientific literature in the early 2000s, when researchers were trying to map the enzymes involved in fat storage. Its discovery was an important step because scientists had already identified DGAT1 and realized a second, distinct gene was also part of the picture. From these first observations, research expanded steadily. Studies in animals soon showed that DGAT2 had a unique biological role, which helped separate its place in metabolism from that of DGAT1. Interest in the DGAT2 gene later grew further when variants in this gene were linked to rare inherited conditions affecting skin and body fat. Over time, descriptions became more precise as genetic research connected earlier laboratory findings with patient care.