Chronic granulomatous disease due to granulocytes with abnormal NADPH
oxidase activity and deficient cytochrome-b
RA Seger, L Tiefenauer, T Matsunaga, A Wildfeuer and PE Newburger
A patient with an X-linked genetic disease resembling chronic granulomatous
disease (CGD) but differing in several aspects from previously studied
cases is described. The oxidase enzyme of the patient's granulocytes was
normally activated, but had reduced activity as shown by an increased
Michaelis constant and decreased maximum velocity of NADPH-dependent
superoxide production. Cytochrome-b was undetectable in dithionite
difference spectra. This CGD-like disease further implicates cytochrome-b
as an important component of the microbicidal NADPH oxidase system and
provides insight into its role in the enzyme complex.
Volume 61,
Issue 3,
pp. 423-428,
03/01/1983
Copyright © 1983 by The American Society of Hematology