Also known as: α1-antitrypsin Serpin family A member 1 Alpha1 proteinase inhibitor A1PI A1AT
Human alpha1-proteinase inhibitor is understood to be the primary anti-protease in the lower respiratory tract, where it inhibits neutrophil elastase (NE). Normal healthy individuals produce sufficient alpha1-proteinase inhibitor to control the NE produced by activated neutrophils and are thus able to prevent inappropriate proteolysis of lung tissue by NE.
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