Author:
Feng Shengchuan,Yang Yuqiong,Wang Fengyan,Shi Weijuan,Xu Jiaxuan,Tang Guoyan,Xie Jiaxing,Zhong Nanshan,Liang Zhenyu,Chen Rongchang
Abstract
Abstract
Rationale
Chronic obstructive pulmonary disease (COPD) is a complicated chronic inflammatory disease. It is important to investigate the characteristics of acute exacerbation of COPD to develop new therapeutic strategies.
Objective
This study aimed to determine the relationship between the human beta-defensin-2 (hBD-2) levels and aggravation of COPD.
Methods
We detected the sputum hBD-2 level of 254 patients from Guangzhou, China, for 2 years. The study participants were categorized into the COPD group (n = 203, GOLD 0–4) and the control group (n = 51, 40–79 years old). At baseline, 12th month, and 24th month, we detected the sputum hBD-2 level and levels of cytokines, such as CXCL10, CXCL11, and IFN.
Results
At baseline, there were no significant differences in the sputum and serum hBD-2 levels between the patients and the controls. However, the sputum hBD-2 levels of patients who had at least one symptom aggravation over the next 2 years were significantly lower than those of patients without any exacerbations (1130.9 ± 858.4 pg/mL vs. 2103.7 ± 1294.2 pg/mL, respectively; p = 0.001). Nevertheless, there were no statistically significant differences in the sputum hBD-2 levels between patients (no aggravation history) and controls (2084.9 ± 1317.6 pg/mL vs. 2152.5 ± 1251.6 pg/mL, respectively; p = 0.626). We used a logistic regression model to assess the relationship between aggravation and sputum hBD-2 levels. Interestingly, we found that low hBD-2 level (< 1000 pg/mL) was significantly associated with exacerbations. Specifically, patients with low hBD-2 levels were more likely to experience exacerbations in the next 12 months (0.333 vs. 0.117; p = 0.001). Moreover, we compared the hBD-2 levels between controls and patients with GOLD 3–4 and found that participants with bacteria (+) and/or viruses (+) had an association between hBD-2 level and disease severity (p = 0.02).
Conclusion
Patients at risk of exacerbations are more likely to have lower sputum hBD-2 levels. These results have important implications for future therapies for COPD.
Funder
Science and Technology Program of Guangzhou
Medical Scientific Research Foundation of Guangdong Province
the National Key Research and Development Program of China
the Sustainable Development Project of Shenzhen Science and Technology Innovation Commission
Publisher
Springer Science and Business Media LLC
Subject
Pulmonary and Respiratory Medicine