Article Text

PDF

The characteristics and clinical significance of mucin levels in bronchoalveolar lavage fluid of patients with interstitial lung disease
  1. Li Wei1,2,
  2. Jing Zhao1,3,
  3. Jing Bao1,
  4. Yanliang Ma1,
  5. Ying Shang1,
  6. Zhancheng Gao1
  1. 1 Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
  2. 2 Department of Respiratory Medicine, Affiliated Hospital of Taishan Medical University, Taian, Shandong, China
  3. 3 Department of Respiratory Medicine, Dushanzi People’s Hospital, Karamay, Xinjiang, China
  1. Correspondence to Dr Yanliang Ma, Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing 100044, China; helloyl1979{at}126.com

Abstract

To investigate the expression and clinical significance of secretory mucins in patients with interstitial lung disease (ILD). The bronchoalveolar lavage fluid (BALF) concentrations of mucins (MUCs) from 27 patients with ILD, 6 patients with lung cancer, 8 patients with pleural effusion and 9 patients with bronchiectasis were determined by ELISA. The concentration of MUC5AC was significantly increased in patients with ILD (12.84±15.02 ng/mL) compared with patients with pleural effusion (4.33±2.51 ng/mL), lung cancer (8.02±5.57 ng/mL) or bronchiectasis (6.08±2.40 ng/mL) (p<0.01). The MUC2 level (10.23±9.27 ng/mL) was significantly elevated in patients with ILD than in those with pleural effusion (6.21±3.28 ng/mL) or bronchiectasis (5.73±1.51 ng/mL) (both p<0.05). Patients with ILD (104.64±61.61 ng/mL), lung cancer (148.45±169.24 ng/mL) or bronchiectasis (123.68±63.28 ng/mL) had significantly greater IL-8 levels than in those with pleural effusion (76.46±2.16 ng/mL) (p<0.05). A significant positive correlation was detected between the MUC5AC concentration and the lymphocyte percentage in BALF of patients with ILD (r=0.504, p=0.007). Lung function tests of patients with ILD exhibited various degrees of restrictive ventilation dysfunction and reduced diffusing capacity. The MUC5AC levels in BALF were negatively correlated with forced expiratory volume in 1 second (FEV1)/forced vital capacity (r=−0.761, p=0.000), FEV1 predicted value (FEV1/pred) (r=−0.668, p=0.002), and diffusing capacity (r=−0.606, p=0.006). Secretory mucins MUC5AC, MUC2 and IL-8 were highly expressed in ILD. MUC5AC level was closely correlated with the amount of inflammatory cells in BALF and the lung function parameters.

  • mucins
  • lung diseases, interstitial

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, an indication of whether changes were made, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

Statistics from Altmetric.com

Footnotes

  • LW and JZ contributed equally.

  • Funding This work was supported by the Chronic Respiratory Disease (RDC) funds of the Chinese Medical Association (Grant No. RDC2009-16) and the Beijing Higher Education Young Elite Teacher Project.

  • Competing interests None declared.

  • Ethics approval The study protocol was approved by the institutional review board at People’s hospital, Peking University.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Not required.

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.