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Serum Cystatin C as an Inflammatory Marker in Exacerbated and Convalescent COPD Patients

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Abstract

Chronic obstructive pulmonary disease (COPD) is a common chronic inflammatory disease with high morbidity and mortality rates. Cystatin C (Cys C) is a sensitive indicator for various chronic inflammatory diseases. In this study, we aimed to evaluate the role of Cys C in COPD patients comparing with the other well-known inflammatory markers. Ninety patients with acute exacerbated COPD were studied and were reassessed when convalescent. Ninety controls were matched for age, gender, body mass index, smoking index, and comorbidity. Serum Cys C was significantly increased in convalescent COPD patients compared with healthy controls and further increased in COPD patients with an acute exacerbation. Serum Cys C was positively correlated with hsCRP both in the exacerbation and convalescence periods of COPD and negatively correlated with FEV1% predicted and FEV1/FVC in the convalescent COPD patients. In conclusion, serum Cys C is a positive acute-phase reactant in COPD patients and might indicate systemic inflammation during the progression of COPD.

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Acknowledgments

This study was supported by grants from the Fundamental Research Funds for the Central Universities of China (No. xjj2015030 to M. Zhang) and the Youth Funds of the Second Affiliated Hospital of Xi’an Jiaotong University (No. YJ(QN)201410 to M. Zhang).

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Correspondence to Jie Zhang.

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All participants gave informed consent. The study protocol was approved by the Research Committee of Human Investigation of Medical College of Xi’an Jiaotong University.

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The authors declare that they have no competing interests.

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Zhang, M., Li, Y., Yang, X. et al. Serum Cystatin C as an Inflammatory Marker in Exacerbated and Convalescent COPD Patients. Inflammation 39, 625–631 (2016). https://doi.org/10.1007/s10753-015-0287-x

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