title: Adipokine CTRP-5 as a Potential Novel Inflammatory Biomarker in Chronic Obstructive Pulmonary Disease.
abstract: Local and systemic inflammation often present in chronic obstructive pulmonary disease (COPD). Adipokines are secretory protein mediators by adipose tissue, which have been found to involve in inflammatory responses in many chronic inflammatory diseases. Therefore, we performed this preliminary clinical study to investigate the possible association between 2 adipokines, C1q/tumor necrosis factor-related protein-3 and -5 (CTRP-3 and CTRP-5), with lung function and other markers of inflammation in COPD. Serum CTRP-3 and CTRP-5 levels were measured in 73 COPD patients and 54 health controls, together with lung function and levels of adiponectin, CRP, TNF-α, and MPO in both groups. Pearson's partial correlation was used to analyze the correlations between CTRPs and other serum markers or lung function. Serum CTRP-5 was significantly elevated in COPD patients (0.41 ± 0.35 versus 0.29 ± 0.28 μg/ml, P = 0.01) and correlated inversely with FEV1/FVC ratio in all patients (r = -0.31, P = 0.001). In COPD patients, CTRP-5 was also correlated negatively with FEV1% predicted (r = -0.464, P < 0.001) and had a positive association with CRP levels (r = 0.262, P = 0.04). However, serum CTRP-3 levels were not correlated with measures of lung function or systemic inflammation. In conclusion, circulating CTRP-5 was associated with the severity of airflow obstruction and systemic inflammation in patients with COPD, which suggests that it may be used as a potential novel inflammatory biomarker in COPD. Further studies should be performed to clarify the exact role of CTRP-5 on the pathogenesis and outcomes of COPD.
authors.affiliation: From the Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, Sichuan University (DL, YW, PT, XZ, HW, TW, YS, FW); Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University (DL, YW, PT, XZ, HW, TW, YS, FW); and Department of Laboratorial Medicine, West China Hospital of Sichuan University (BY, LW).
authors.forename: Diandian
authors.initials: D
authors.lastname: Li
authors.forename: Yanqiu
authors.initials: Y
authors.lastname: Wu
authors.forename: Panwen
authors.initials: P
authors.lastname: Tian
authors.forename: Xue
authors.initials: X
authors.lastname: Zhang
authors.forename: Hao
authors.initials: H
authors.lastname: Wang
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Binwu
authors.initials: B
authors.lastname: Ying
authors.forename: Lanlan
authors.initials: L
authors.lastname: Wang
authors.forename: Yongchun
authors.initials: Y
authors.lastname: Shen
authors.forename: Fuqiang
authors.initials: F
authors.lastname: Wen
mesh_terms: D052242:Adiponectin / Q000378:metabolism; D000273:Adipose Tissue / Q000378:metabolism; D000368:Aged; D015415:Biomarkers / Q000097:blood; D003094:Collagen / Q000097:blood*; D005260:Female; D006801:Humans; D007249:Inflammation / Q000097:blood*; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000097:blood / Q000503:physiopathology; D012129:Respiratory Function Tests / Q000379:methods; D012720:Severity of Illness Index; D013223:Statistics as Topic; D048069:Tumor Necrosis Factors / Q000097:blood*
chemical_list: D052242:Adiponectin; D015415:Biomarkers; C506069:C1QTNF3 protein, human; C487851:C1QTNF5 protein, human; D048069:Tumor Necrosis Factors; D003094:Collagen