Exhaled 8-isoprostane in sarcoidosis: relation to superoxide anion production by bronchoalveolar lavage cells.Inflamm Res. 2010 Dec; 59(12):1027-32.IR
This study was designed to examine the mutual relationship between 8-isoprostane in exhaled breath condensate (EBC) and superoxide anion generation by bronchoalveolar lavage fluid (BALF) cells in patients with sarcoidosis.
About 29 patients with sarcoidosis, 34 healthy never smokers (control group for EBC) and 15 healthy never smokers (control group for BAL) were examined. EBC was collected directly before bronchoscopy. 8-Isoprostane was measured by ELISA, and superoxide anion by colorimetry.
Exhaled breath condensate 8-isoprostane is increased in sarcoidosis (median, 25-75 percentile): 2.50; 2.50-3.90 versus 6.20; 2.50-16.95 pg/ml, p ≤ 0.05). Spontaneous superoxide anion release from BALF cells was significantly elevated only in patients with a high percentage of lymphocytes in BALF (6.42 ± 1.24 vs. 23.52 ± 4.30 nmol/10(6) cells, p ≤ 0.01). There were no correlations between 8-isoprostane and spontaneous or stimulated superoxide anion release.
We confirmed higher concentrations of EBC 8-isoprostane in sarcoidosis and higher spontaneous release of superoxide anion from BALF cells in patients with sarcoidosis. The increase of EBC 8-isoprostane is not directly related to superoxide anion released from BALF cells.