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Eur Respir J 1999; 13: 810-813
Copyright © ERS Journals Ltd 1999

Original Articles

Soluble intercellular adhesion molecule-1 in the bronchoalveolar lavage fluid of normal children exposed to parental cigarette smoke

J Grigg, J Riedler, and CF Robertson

This study sought to test the hypothesis that normal children exposed to parental cigarette smoke have increased bronchoalveolar lavage (BAL) fluid levels of soluble intercellular adhesion molecule (sICAM)-1. Cells and solutes from the lower airway of normal children were obtained by nonbronchoscopic BAL using three aliquots of 1 mL x kg body weight(-1) normal saline, prior to elective orthopaedic surgery. Children with evidence of recent or ongoing infection, atopic disease, previous history of wheeze, and chronic respiratory symptoms were excluded. Twelve children with parents who smoked (group 1) were paired with 12 age- and weight-matched controls with self-reported nonsmoking parents (group 2). There was no significant difference (group 1 versus 2) in the volume of BAL fluid recovered (median 29.0 versus 28.7 mL), the percentage of alveolar macrophages (92.5 versus 91.8%), neutrophils (1.1 versus 2.1%), lymphocytes (5.3 versus 5.6%) and eosinophils (0 versus 0%), and the total BAL fluid leukocyte concentration (80 versus 61 x 10(3) cells x mL(-1)). BAL fluid albumin concentration was similar between the two groups (0.033 versus 0.020 mg x mL(-1)). sICAM-1 was detected in all BAL fluid samples, and was significantly increased in group 1 (39.2 versus 22.5 ng x mL(-1), p<0.01). It was concluded that exposure of children to parental cigarette smoke is associated with increased soluble intercellular adhesion molecule-1 concentrations in the bronchoalveolar lavage fluid and this may reflect an altered activation of pulmonary immune cells.


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