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Factor XIII in bronchoalveolar lavage fluid from children with chronic bronchoalveolar inflammation

Factor XIII in bronchoalveolar lavage fluid from children with chronic bronchoalveolar inflammation

Journal of Thrombosis and Haemostasis 3(7): 1407-1413

Extravascular activation of the coagulation system and consequent fibrin deposition is involved in the pathomechanism of chronic bronchoalveolar inflammatory diseases. The turnover of extravascular fibrin is attenuated by its cross-linking with activated factor XIII (FXIII). Determination of cellular and plasmatic forms of FXIII and their correlation with D-dimer level in the bronchoalveolar lavage fluid (BALF) from healthy children and from children with bronchoalveolar inflammation. Highly sensitive immunoassays were used for the quantitation of cellular and plasma FXIII and D-dimer in the BALF of children with recurrent wheezy bronchitis and fibrosing alveolitis. BALF was investigated for FXIII-containing cells by flow cytometry. In the BALF of controls a low amount of the cellular form of FXIII (FXIII A2) and D-dimer were measured, while plasma FXIII (FXIII A2B2) was absent. Alveolar macrophages represented the single cell population in BALF that contained FXIII. In the BALF of both patients' groups the concentration and the total amount of FXIII A2 was significantly elevated, and plasma FXIII also appeared in the BALF of most patients. The D-dimer concentration was also elevated in the patients' groups and it correlated both with plasma FXIII and neutrophil count. These findings suggest that FXIII A2 is released from activated or injured alveolar macrophages into the bronchoalveolar lining fluid and in bronchoalveolar inflammatory diseases, FXIII A2B2 also leaks out from the capillaries. By cross-linking fibrin and inhibitors of fibrinolysis to fibrin, FXIII might be a key regulator of fibrin turnover in the extravascular compartment.

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Accession: 049057769

Download citation: RISBibTeXText

PMID: 15892856

DOI: 10.1111/j.1538-7836.2005.01353.x

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