PMID: 9543279May 16, 1998Paper

Soluble complement receptor type 1 (CD35) in bronchoalveolar lavage of inflammatory lung diseases

The European Respiratory Journal
J HamacherL P Nicod

Abstract

Complement receptor type 1 (CR1) (CD35; C3b/C4b receptor) is a transmembrane protein of many haematopoietic cells. Once cleaved, soluble complement receptor type 1 (sCR1) exerts opposite effects as a powerful inhibitor of complement. This study addressed both the question of whether sCR1 was found in bronchoalveolar lavage (BAL) of normals and patients with various inflammatory disease, and its possible origin. In this retrospective study covering specimen and clinical data of 124 patients with acute and chronic inflammatory lung pathologies, BAL supernatants were analysed by enzyme-linked immunosorbent assay technique for sCR1. Correlations were made between the sCR1 levels obtained and the constituents of BAL. Human alveolar macrophages were cultivated in order to determine their secretory capacity of sCR1. Alveolar macrophages from normal subjects were shown to release sCR1 in vitro. In addition, sCR1 was present in BAL of normal controls and was significantly increased in acute inflammatory lung diseases such as acute respiratory distress syndrome (ARDS), bacterial and Pneumocystis carinii pneumonia, as well as in chronic inflammatory diseases such as interstitial lung fibrosis and sarcoidosis. In BAL of ARDS, bacterial, an...Continue Reading

Citations

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