About Alpha-1 Antitrypsin
Alpha1-antitrypsin (Alpha-1) is a protein that is produced mostly in the liver. Its primary function is to protect the lungs from neutrophil elastase. Neutrophil elastase is an enzyme that normally serves a useful purpose in lung tissue—it digests damaged or aging cells and bacteria to promote healing. However, if left unchecked, it will also attack healthy lung tissue. Alpha1-antitrypsin, in sufficient amounts, will trap and destroy neutrophil elastase before it has a chance to begin damaging the delicate lung tissue. Consequently, if an individual doesn’t have enough Alpha1-antitrypsin, the enzyme goes unchecked and attacks the lung.
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From left to right: Robert Lefebvre, John Walsh,
Dennis Jackman and Dr. Steven Nathan |
Most people have two normal copies of the Alpha1-antitrypsin gene. People with Alpha-1 may have one normal copy and one damaged copy, or two damaged copies. Most Alphas with at least one normal gene can produce enough Alpha1-antitrypsin to stay healthy, especially if they don’t smoke.
However, people with two damaged copies of the gene can’t produce enough Alpha1-antitrypsin, which can cause several conditions. They are often diagnosed with emphysema as their primary disease. Other common diagnoses include COPD (chronic obstructive pulmonary disease), asthma, chronic bronchitis, and bronchiectasis. Alphas are usually quite susceptible to lung infections. In the Alpha-1 patient, any of these conditions can cause further damage if they aren't treated right away.
Another disease that some Alpha patients develop is cirrhosis of the liver. This scarring of healthy liver tissue affects Alpha-1 infants, as well as 12 to 15 percent of adult Alphas. Unfortunately, there is no cure for cirrhosis of the liver, regardless of its cause. Cirrhosis can be managed as a chronic condition if caught early and protective steps are taken. Still, a liver transplant is currently the only option available for advanced disease.
More rarely, Alphas may also have a disease known as panniculitis. Panniculitis is an inflammation in the fatty tissue under the skin. It can occur in both children and adults.
Alphas and physicians regularly speak of a patient’s “primary disease.” This means the principal way the deficiency is manifested in a given patient, whether in the lungs, the liver or the skin. |