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- W2031269904 abstract "We studied the generation and metabolism of lipoxygenase products in peripheral granulocytes from children suffering from cystic fibrosis (CF). Peripheral granulocytes were stimulated at different times (days) before and during anti-infectious treatment with the Ca ionophore (7.5 microM, 5 and 20 min), opsonized zymosan (2 mg) and arachidonic acid (50 microM); the amount of lipoxygenase products in the cell supernatants was determined by high performance liquid chromatography. Granulocytes from patients with CF, compared to an age-matched control group, showed an increased omega-oxidation of the synthesized leukotriene (LTB4) into 20-OH- and 20-COOH-LTB4 after stimulation with the Ca ionophore (ratio of LTB4 versus omega-oxidated products in patients with CF: 0.77 +/- 0.07, mean +/- SEM, n = 11; control group: 1.07 +/- 0.1, n = 11, p less than 0.01) whereas the combined amounts of LTB4 and its omega-oxidated products did not differ significantly. A comparable profile was observed with opsonized zymosan. Stimulation of the cells with the Ca ionophore combined with arachidonic acid led to a significantly increased formation of lipoxygenase products in the patient group, whereas only a slight enhancement was observed in the control group. During the 14-day anti-infectious treatment a normalization of the altered pattern was observed. 12-Hydroxyeicosatetraenoic acid (12-HETE) production from platelets within the granulocyte fraction was significantly depressed in the CF group compared to the controls (38.5 +/- 12.5 versus 339 +/- 93 ng/5 +/- 10(6) cells, p less than 0.005). Within the CF group a strong correlation between the release of LTB4 and its metabolites, the production of 12-HETE and clinical (e.g. pO2, FEV1) and laboratory findings (e.g. IgE and IgG levels, C-reactive protein) was established. Our data suggest that the inflammatory process in patients with CF is associated with an alteration of the lipoxygenase pathway of granulocytes which correlates with the clinical signs of inflammation." @default.
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- W2031269904 date "1990-01-01" @default.
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- W2031269904 title "Generation and Metabolism of Leukotrienes in Granulocytes of Patients with Cystic Fibrosis" @default.
- W2031269904 doi "https://doi.org/10.1159/000235306" @default.
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