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Eur Respir J 2002; 20:1206-1212
Copyright ©ERS Journals Ltd 2002

CC and C chemokine expression in pulmonary sarcoidosis

M. Petrek1, V. Kolek2, J. Szotkowská1 and R.M. du Bois3

1 Depts of Immunology and 2 Respiratory Medicine, Palacky University and University Hospital, Olomouc, Czech Republic. 3 Interstitial Lung Disease Unit, Royal Brompton Hospital, London, UK

CORRESPONDENCE: M. Petrek, Dept of Immunology, Palacky University, IP Pavlova str. 6, 775 20 Olomouc, Czech Republic. Fax: 420 585415116. E-mail: petrekm@fnol.cz

Keywords: CC chemokine ligand, lung, lymphotactin, monocyte chemoattractant protein-1, RANTES, XC chemokine ligand

Received: October 26, 2001
Accepted June 16, 2002

This study was supported by the Czech Ministries of Health (IGA 3768-3) and of Schools, Education and Physical Training (MSM 151100002).

The chemokines RANTES (regulated on activation, T-cell expressed and secreted; CC chemokine ligand (CCL)-5) and monocyte inflammatory protein (MIP)-1{alpha} (CCL-3) have been implicated in the development of alveolitis in pulmonary sarcoidosis. The novel C chemokine single cysteine motif (SCM)-1{alpha} (XCL-1) and the CC chemokine monocyte chemoattractant protein (MCP)-1 (CCL-2) are also mononuclear-cell attractants and represent alternative candidate mediators of alveolitis. Therefore, the expression of MCP-1 and SCM-1{alpha} was investigated together with the expression of RANTES and MIP-1{alpha} in bronchoalveolar lavage fluid (BALF) from control subjects and patients with sarcoidosis. The relationship between chemokine expression and sarcoidosis clinical course was also explored.

Messenger ribonucleic acid (mRNA) expression for all four chemokines was determined by semiquantitative reverse transcriptase-polymerase chain reaction of RNA extracted from unseparated bronchoalveolar cells (17 patients, 12 controls). RANTES, MIP-1{alpha} and MCP-1 proteins were measured by enzyme-linked immunosobent assay of unconcentrated BALF (60 patients, 17 controls).

MCP-1, and namely RANTES and SCM-1{alpha} mRNA expression was upregulated in sarcoidosis, particularly in patients with more advanced disease. RANTES, and namely MCP-1 concentrations were elevated in BALF samples obtained from patients; MCP-1 levels were most increased in patients with chest radiographic stage 2 disease and also in patients with persistent and recurrent disease.

In conclusion, chemokines monocyte chemotactive protein-1 and single cysteine motif-1{alpha} are, in addition to RANTES, associated with the development of alveolitis in sarcoidosis and their expression parallels the disease course.




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