Polymorphonuclear leukocytes (PMNL) isolated from two patients with chronic granulomatous disease (CGD) were tested for their ability to metabolize arachidonic acid to lipoxygenase products including 5(S),12(R)-dihydroxy-6,14-cis-8,10-trans-eicosatetraenoic acid (LTB4). Analyses of incubations of these PMNL with arachidonic acid and the calcium ionophore A23187 did not differ from simultaneous controls in the production of LTB4, other 5,12-dihydroxy-eicosatetraenoic acids, or monohydroxy-eicosatetraenoic acids. The clinical diagnosis of CGD was confirmed in both cases by determination of PMNL chemiluminescence. Leukocytes from both patients failed to generate active oxygen species in response to either LTB4 or formyl-methionyl-leucyl-phenylalanine. The observation of arachidonic acid oxidation in the absence of superoxide anion precludes a role for the active oxygen species in this metabolic process. These studies clearly dissociate the ionophore-induced leukocyte respiratory burst from the oxidation of arachidonate to the leukotrienes. In addition, the defect of CGD appears to be unrelated to the ability of PMNL to carry out arachidonate oxygenation.
S J Feinmark, A M Udén, J Palmblad, C Malmsten
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