TY - JOUR AU - Hong, Ji Young AU - Park, So Yeong AU - Kim, Youngmi AU - Lee, Chang Youl AU - Lee, Myung Goo PY - 2018 TI - Calpain and spectrin breakdown products as potential biomarkers in tuberculous pleural effusion JF - Journal of Thoracic Disease; Vol 10, No 5 (May 31, 2018): Journal of Thoracic Disease Y2 - 2018 KW - N2 - Background: Early diagnosis of tuberculous pleural effusion (TPE) remains difficult. Calpain is a family of calcium-dependent endopeptidase that plays an important role in extracellular matrix (ECM) remodeling and collagen synthesis. The aim of this study was to explore the diagnostic value of pleural fluid angiotensin-converting enzyme (ACE), calpain-1, spectrin breakdown products (SBDP), and matrix metalloproteinase-1 (MMP-1) in TPE and malignant pleural effusion (MPE). Methods: The study included 47 patients with TPE, 28 patients with MPE, and 10 patients with transudate of non-tuberculous and non-malignant origin as controls. Calpain-1, ACE, SBDP, and MMP-1 levels in pleural fluid were measured by the ELISA method. Results: ACE, calpain-1, SBDP, and MMP-1 levels were higher in TPE than MPE and transudate (all, P Conclusions: Our results suggest that the overproduction of calpain-1 and SBDP is associated with pleural fibrosis in tuberculous pleurisy. While ADA is a conventional marker for diagnostic TPE, the simultaneous measurement of calpain-1 and SBDP l in pleural fluid may improve the diagnostic efficacy. UR - https://jtd.amegroups.org/article/view/21037