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Chest. 1993 Feb;103(2):496-9.

Surfactant protein-A concentration in bronchoalveolar lavage fluids of patients with pulmonary alveolar proteinosis.

Author information

1
Department of Internal Medicine, Sapporo Medical College, Japan.

Abstract

Pulmonary alveolar proteinosis (PAP) is characterized by accumulation of large quantities of lipoproteinaceous materials in alveoli. Surfactant protein A (SP-A) is the predominant phospholipid-associated glycoprotein in pulmonary surfactant and is specific to the lung. The contents of SP-A in bronchoalveolar lavage (BAL) fluids of patients with PAP were measured with an enzyme-linked immunosorbent assay using two monoclonal antibodies to human SP-A to evaluate its usefulness for diagnosis. Concentration of SP-A in BAL fluid in PAP was significantly increased in comparison with that of normal volunteers. The ratio of SP-A to protein in BAL fluid of PAP was at almost the same level as in normal subjects, while the ratio of SP-A to phospholipid in PAP was significantly higher. These results indicate that measurement of BAL fluid SP-A is of clinical value for diagnosis of PAP and should be used as a biochemical diagnostic tool in the clinical laboratory.

PMID:
8432143
DOI:
10.1378/chest.103.2.496
[Indexed for MEDLINE]

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