ALPHA-1-ANTITRYPSIN (AAT)

Alpha-1-antitrypsin (AAT) is a protein produced by the liver that protects tissues from enzymes released by inflammatory cells. The AAT test measures the level of this protein in the blood and is used to diagnose and monitor AAT deficiency, a genetic disorder that can lead to lung and liver diseases. Low levels of AAT can result in conditions such as chronic obstructive pulmonary disease (COPD), emphysema, and liver cirrhosis. This test is essential for identifying individuals with AAT deficiency and guiding appropriate treatment to prevent or manage associated health complications.