Alpha-1 antitrypsin deficiency is a genetic disease caused by low levels of the alpha-1 antitrypsin (AAT) protein.
AAT is made in the liver and is transported to the lungs. In the lungs, AAT regulates the activity of an enzyme called neutrophil elastase, which is necessary for fighting infections.
People with alpha-1 antitrypsin deficiency produce lower levels of functional AAT and are not able to regulate the activity of neutrophil elastase. When neutrophil elastase is not properly regulated, it can attack and destroy normal lung tissue. Abnormal AAT can also build up in the liver, leading to liver damage.
Take this test to find out if you are at risk, so you can start making changes now to stay healthy.
This test detects genetic variation in the SERPINA1 gene. This gene encodes alpha-1 antitrypsin (AAT). More than 95% of alpha-1 antitrypsin deficiency cases are caused by two variant alleles known as PI*S and PI*Z, which lead to reduced or abnormal AAT.
The wild type form of the SERPIN1 gene is known as the PI*M allele, while the two variant alleles associated with the majority of AAT deficiency cases are known as PI*S and PI*Z. This report details your risk of alpha-1 antitrypsin deficiency based on your SERPIN1 genotype:
- PI*MM, PI*MS or PI*SS – Not at increased risk
- PI*MZ or PI*SZ – Not at increased risk if you are a nonsmoker. Smokers are at increased risk
- PI*ZZ – Increased risk for both nonsmokers and smokers
Understanding your genetic risk for alpha-1 antitrypsin deficiency can encourage early monitoring and symptom management to avoid lung and liver damage.
How It Works
Step 1: Sign up for a free DNA Access account.
Step 2: Upload your DNA markers to DNA Access.
Step 3: Log in to your account to access your results when they are ready.