title: Exhaled 8-isoprostane and prostaglandin E(2) in patients with stable and unstable cystic fibrosis.
abstract: We measured 8-isoprostane, a biomarker of oxidative stress, and prostaglandin (PG) E(2) in exhaled breath condensate in 36 stable and 14 unstable cystic fibrosis (CF) patients, and in 15 healthy age-matched controls. We studied the relationships of these eicosanoids with clinical, radiological, and systemic inflammatory parameters. Compared with controls [15.5 (11.5-17.0) pg/ml] exhaled 8-isoprostane was increased in stable CF patients [30.5 (25.3-36.0) pg/ml, P<0.001]. Unstable CF patients had higher exhaled 8-isoprostane levels [47.5 (44.0-50.0) pg/ml, P<0.001] than stable CF patients. Unlike PGE(2), exhaled 8-isoprostane was negatively correlated with FEV(1) (r=-0.67; P<0.0001; r=-0.63; P<0.02) and Shwachman score (r=-0.43, P=0.012; r=-0.58, P=0.031) and positively correlated with Chrispin-Norman score (r=0.51, P<0.002; r=0.56, P=0.039) in stable and unstable CF patients, respectively. No correlation was observed with C-reactive protein. Compared with controls [41.0 (29.0-50.0) pg/ml], exhaled PGE(2) was also elevated in stable [72.0 (64.3-81.8) pg/ml, P<0.001) and, to a greater extent, in unstable CF patients [83.0 (74.3-91.3) pg/ml, P<0.001). In patients with CF, exhaled 8-isoprostane and PGE(2) could be a useful marker of disease severity.
authors.affiliation: Department of Pediatrics, Cystic Fibrosis Unit, Ospedale Pediatrico Bambino Gesù, Rome, Italy.
authors.forename: Vincenzina
authors.initials: V
authors.lastname: Lucidi
authors.forename: Giovanni
authors.initials: G
authors.lastname: Ciabattoni
authors.forename: Sergio
authors.initials: S
authors.lastname: Bella
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Barnes
authors.forename: Paolo
authors.initials: P
authors.lastname: Montuschi
mesh_terms: D001944:Breath Tests; D002097:C-Reactive Protein / Q000378:metabolism; D002648:Child; D003430:Cross-Sectional Studies; D003550:Cystic Fibrosis / Q000097:blood / Q000378:metabolism* / Q000503:physiopathology; D015237:Dinoprost / Q000031:analogs & derivatives* / Q000378:metabolism; D015232:Dinoprostone / Q000378:metabolism*; D005260:Female; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D012129:Respiratory Function Tests
chemical_list: C075750:8-epi-prostaglandin F2alpha; D002097:C-Reactive Protein; D015237:Dinoprost; D015232:Dinoprostone