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Although eicosanoids are involved in lung carcinogenesis they were poorly investigated in exhaled breath condensate (EBC) and bronchoalveolar lavage fluid (BALf) in patients with primary lung cancer. In this study 17 patients with diagnosed non-small cell lung cancer, 10 healthy smokers and 12 healthy nonsmokers were included. The levels of cys-LTs, 8-isoprostane, LTB4 and PGE2 were measured before any treatment in the EBC of all patients and in BALf of patients with lung cancer by enzyme linked immunosorbent assay. 8-isoprostane, LTB4, cys-LTs and PGE2 were detectable in the EBC and BALf. There were no significant differences between healthy smokers and nonsmokers in concentrations of all measured mediators. Compared with both healthy controls, patients with diagnosed lung cancer displayed higher concentrations of cys-LTs ( p &lt; 0.05) and LTB4 ( p &lt; 0.05) in EBC. In patients with lung cancer, the mean concentrations of all measured mediators were significantly higher in BALf compared with EBC and there was a significant, positive correlation between concentration of cys-LTs, LTB 4 and 8-isoprostane in BALf and their concentrations in the EBC ( r = 0.64, p &lt; 0.05, r = 0.59, p &lt; 0.05, r = 0.53, p &lt; 0.05 respectively). Since cys-LT, LTB4 and 8-isoprostane concentrations in EBC from patients with lung cancer reflect their concentrations in BALf, they may serve as a possible non-invasive method to monitor the disease and to assess the effectiveness of therapy.

Eicosanoids in Exhaled Breath Condensate and Bronchoalveolar Lavage Fluid of Patients with Primary Lung Cancer