BACKGROUND: Neutrophil gelatinase-associated lipocalin (NGAL) is an antimicrobial peptide that could be involved in the pathogenesis of COPD. This study aimed to measure the plasma levels of NGAL in a large cohort of patients with COPD and control subjects and examine the levels of NGAL by COPD characteristics. METHODS: The study included 402 patients with COPD and 229 control subjects aged 40 to 76 years from the Bergen COPD Cohort Study. All patients with COPD had an FEV(1)/FVC ratio of < 0.7, an FEV(1) < 80% predicted, and a smoking history of ≥ 10 pack-years. Plasma levels of NGAL were determined by enzyme immunoassay. Linear regression models were fitted with NGAL as the outcome variable. Confounders examined were sex, age, smoking, Charlson comorbidity score, use of inhaled steroids, neutrophil cell count, plasma creatinine and ferritin, and C-reactive protein. RESULTS: Mean ± SD plasma concentrations of NGAL were 75.1 ± 31.8 ng/mL in patients with COPD and 56.5 ± 22.0 ng/mL in control subjects (P < .01). NGAL levels were bivariately associated with age, smoking, body composition, Charlson comorbidity score, neutrophil blood count, creatinine, and C-reactive protein but were significantly elevated in patients with COPD, even after adjustment for confounders. Frequent exacerbations and hypoxemia was associated with higher levels of NGAL, whereas increasing Global Initiative for Chronic Obstructive Lung Disease stage was associated with lower levels of NGAL among patients with COPD. CONCLUSIONS: Plasma levels of NGAL were significantly higher in patients with COPD compared with control subjects. NGAL was related to important COPD characteristics.
BACKGROUND:Neutrophil gelatinase-associated lipocalin (NGAL) is an antimicrobial peptide that could be involved in the pathogenesis of COPD. This study aimed to measure the plasma levels of NGAL in a large cohort of patients with COPD and control subjects and examine the levels of NGAL by COPD characteristics. METHODS: The study included 402 patients with COPD and 229 control subjects aged 40 to 76 years from the Bergen COPD Cohort Study. All patients with COPD had an FEV(1)/FVC ratio of < 0.7, an FEV(1) < 80% predicted, and a smoking history of ≥ 10 pack-years. Plasma levels of NGAL were determined by enzyme immunoassay. Linear regression models were fitted with NGAL as the outcome variable. Confounders examined were sex, age, smoking, Charlson comorbidity score, use of inhaled steroids, neutrophil cell count, plasma creatinine and ferritin, and C-reactive protein. RESULTS: Mean ± SD plasma concentrations of NGAL were 75.1 ± 31.8 ng/mL in patients with COPD and 56.5 ± 22.0 ng/mL in control subjects (P < .01). NGAL levels were bivariately associated with age, smoking, body composition, Charlson comorbidity score, neutrophil blood count, creatinine, and C-reactive protein but were significantly elevated in patients with COPD, even after adjustment for confounders. Frequent exacerbations and hypoxemia was associated with higher levels of NGAL, whereas increasing Global Initiative for Chronic Obstructive Lung Disease stage was associated with lower levels of NGAL among patients with COPD. CONCLUSIONS: Plasma levels of NGAL were significantly higher in patients with COPD compared with control subjects. NGAL was related to important COPD characteristics.
Authors: Evelyn Tsantikos; Maverick Lau; Cassandra Mn Castelino; Mhairi J Maxwell; Samantha L Passey; Michelle J Hansen; Narelle E McGregor; Natalie A Sims; Daniel P Steinfort; Louis B Irving; Gary P Anderson; Margaret L Hibbs Journal: J Clin Invest Date: 2018-04-30 Impact factor: 14.808
Authors: Maria A Pabón; Edwin Patino; Divya Bhatia; Joselyn Rojas-Quintero; Kevin C Ma; Eli J Finkelsztein; Juan C Osorio; Faryal Malick; Francesca Polverino; Caroline A Owen; Stefan W Ryter; Augustine Mk Choi; Suzanne M Cloonan; Mary E Choi Journal: JCI Insight Date: 2018-09-20
Authors: K A Oikonomou; A N Kapsoritakis; C Theodoridou; D Karangelis; A Germenis; I Stefanidis; S P Potamianos Journal: J Gastroenterol Date: 2011-12-27 Impact factor: 7.527