Causes and Risk Factors for Autoimmune Hepatitis
Autoimmune hepatitis is a long-lasting (chronic) liver disease caused by the body’s immune system attacking healthy liver cells. Normally, the immune system helps fight virus, bacteria, and other causes of disease. With autoimmune hepatitis, the immune system mistakenly identifies healthy liver cells as harmful invaders and attacks them. These attacks damage the liver and may potentially progress to impaired liver function or liver failure.
The exact cause of autoimmune hepatitis is still not fully understood by experts. In some cases, people with autommune hepatitis also have other autoimmune conditions. Examples of other autoimmune conditions include rheumatoid arthritis, ulcerative colitis, and celiac disease. However, research suggests that a combination of factors may contribute to the development of this condition.
Here are some key points to consider:
- Genetic Predisposition: Certain genes may make some individuals more susceptible to developing autoimmune diseases, including autoimmune hepatitis. These genes can increase the likelihood of an abnormal immune system response.
- Environmental Triggers: Factors in the environment may act as triggers for an autoimmune reaction in individuals with genetic predisposition. These triggers can prompt the immune system to mistakenly attack the liver cells. Some potential environmental triggers being studied include certain viruses and medications.
- Medications: In some cases, certain medications can cause liver injury that resembles autoimmune hepatitis. However, once the medication is stopped, the liver injury typically resolves.
Autoimmune hepatitis can occur at any age. Non-modifiable risk factors include:
- Sex assigned at birth: Although autoimmune hepatitis can affect people of any sex, it is more commonly diagnosed in females.
- Genetics: Genetic factors play a role in the development of autoimmune hepatitis. Having a family history of the condition increases the risk.
- Other autoimmune conditions: People who have an autoimmune disease such as celiac disease, rheumatoid arthritis, type 1 diabetes, lupus, and certain types of hyperthyroidism have a higher risk of developing autoimmune hepatitis.
- Biliary tract conditions: People with primary biliary cholangitis or primary sclerosing cholangitis may have a higher risk of developing autoimmune hepatitis.
There are few known modifiable risk factors for autoimmune hepatitis. Certain environmental factors may trigger autoimmune hepatitis in individuals who are genetically predisposed to the condition. These triggers can include
- Viral infections
- Exposure to toxins or chemicals
- Medications: Examples of medications that may increase risk of autoimmune hepatitis include certain antibiotics, blood pressure medicines, and cholesterol-lowering medicines.
It is always recommended to consult with a healthcare provider for personalized advice and guidance on managing risk factors for autoimmune hepatitis or any other health condition.
There currently are no specific recommended actions that people can take to reduce their risk for autoimmune hepatitis since there are few modifiable risk factors.
- Get tested for autoimmune hepatitis: People at higher risk for autoimmune hepatitis, such as people with a family history or other autoimmune conditions, should work with their healthcare professionals to monitor for signs or symptoms of autoimmune hepatitis. This can help identify the condition and allow for the initiation of a long-term treatment plan if necessary.
- Discuss preventive measures with a healthcare professional who specializes in autoimmune diseases, including autoimmune hepatitis. They can advise about ways to avoid or reduce exposure to environmental factors that may trigger autoimmune hepatitis, such as viral infections, chemicals or medications, based upon individual factors and circumstances.