title: Elevated Plasma Neutrophil Gelatinase-Associated Lipocalin Level as a Risk Factor for Anemia in Patients with Systemic Inflammation.
abstract: Studies on neutrophil gelatinase-associated lipocalin (NGAL) as an iron-regulatory protein are limited. This study investigated the relationships between plasma NGAL levels and indices of anemia in 187 patients with systemic inflammation. Plasma NGAL levels were significantly higher in patients with anemia versus in patients without anemia (185 ng/mL versus 98 ng/mL;P< 0.001). Serum iron levels were lower in patients with NGAL > 156 ng/mL than in those with NGAL ≤ 156 ng/mL (27.4 ± 25.3µg/dL versus 58.1 ± 43.5µg/dL;P< 0.001). In a receiver operating characteristic curve, the diagnostic ability of NGAL to identify anemia was superior to that of high-sensitivity C-reactive protein [0.712 (95% CI, 0.618-0.787) versus 0.649 (95% CI, 0.573-0.744);P< 0.01]. In a multivariate logistic regression analysis, the elevated NGAL level was significantly associated with the presence of anemia after adjusting for potential confounders [odds ratio, 1.30 (95% CI, 1.07-2.58);P= 0.010]. In conclusion, enhanced NGAL production may contribute to the development of anemia in patients with systemic inflammation.
authors.affiliation: Department of Laboratory Medicine, College of Medicine, Inha University, Incheon 22332, Republic of Korea.
authors.forename: Jong Weon
authors.identifier: 0000-0002-3775-6237
authors.initials: JW
authors.lastname: Choi
authors.affiliation: School of Medicine, University of Tsukuba, Ibaraki 305-8577, Japan.
authors.forename: Tatsuyoshi
authors.initials: T
authors.lastname: Fujii
authors.affiliation: Department of Electrical Engineering and Bioscience, Waseda University, Tokyo 169-8050, Japan.
authors.forename: Noriyoshi
authors.initials: N
authors.lastname: Fujii
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000740:Anemia / Q000097:blood* / Q000175:diagnosis* / Q000378:metabolism; D015415:Biomarkers / Q000097:blood; D002097:C-Reactive Protein / Q000378:metabolism; D005260:Female; D006801:Humans; D007249:Inflammation / Q000097:blood* / Q000000981:diagnostic imaging* / Q000378:metabolism; D007501:Iron / Q000097:blood; D000071068:Lipocalin-2 / Q000097:blood*; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D055815:Young Adult
chemical_list: D015415:Biomarkers; C489506:LCN2 protein, human; D000071068:Lipocalin-2; D002097:C-Reactive Protein; D007501:Iron