Danazol-induced augmentation of serum alpha 1-antitrypsin levels in individuals with marked deficiency of this antiprotease

The Journal of Clinical Investigation
J E GadekR G Crystal

Abstract

Individuals with serum alpha1-antitrypsin levels below 80 mg/dl are clearly at risk for the development of accelerated panacinar emphysema. One possible approach to the therapy of this disorder would be to raise serum levels of this major antiprotease to establish protease-antiprotease homeostasis within the lung parenchyma. Because danazol, an impeded androgen, elevates levels of C1 inhibitor in patients deficient of that serum antiprotease, we hypothesized that this agent might also increase alpha1-antitrypsin levels in patients with alpha1-antitrypsin deficiency. To evaluate this concept, seven patients with severe emphysema associated with alpha1-antitrypsin deficiency (six PiZ and 1 M(Duarte)Z) and one asymptomatic individual (PiSZ) received 600 mg of danazol daily for 30 d. Five of the six PiZ patients responded to danazol therapy with significant increases in serum alpha1-antitrypsin levels (mean increase of 37%; P < 0.03). The two individuals who were heterozygous for the Z protein increased their serum levels by 85% (PiM(Duarte)Z) and 87% (PiSZ), respectively. These increases in serum alpha1-antitrypsin antigen were accompanied by commensurate increases in serum trypsin inhibition. Crossed immunoelectrophoresis showed ...Continue Reading

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