Does pulmonary airway inflammation relate to intercellular adhesion molecule (ICAM-1) in bronchoalveolar lavage
Insights
Intercellular adhesion molecule-1 (ICAM-1) in bronchoalveolar lavage (BAL) fluid correlates with patient illness severity. This finding suggests BAL ICAM-1 may indicate pulmonary disease processes.
Area of Science:
- Pulmonary Medicine
- Immunology
- Biomarker Research
Background:
- Intercellular adhesion molecule-1 (ICAM-1) is a cell surface glycoprotein involved in immune responses.
- Assessing ICAM-1 levels in bronchoalveolar lavage (BAL) fluid may offer insights into pulmonary conditions.
Purpose of the Study:
- To evaluate the clinical significance of ICAM-1 concentrations in BAL fluid.
- To determine potential correlations between BAL ICAM-1 levels and patient illness severity, smoking status, and specific infections.
Main Methods:
- Bronchoalveolar lavage (BAL) samples were collected from 44 patients undergoing diagnostic bronchoscopy.
- BAL fluid ICAM-1 concentrations were quantified using enzyme immunoassay.
- Patient illness severity was assessed using modified APACHE II scores.
Main Results:
- A significant positive correlation was observed between BAL ICAM-1 levels and modified APACHE II scores (p=0.026).
- No significant association was found between ICAM-1 levels and cigarette use or Pneumocystis carinii infection.
- Elevated BAL ICAM-1 (10-fold) was noted in a subset of smokers with pulmonary infections.
Conclusions:
- BAL ICAM-1 levels may be associated with the underlying pulmonary pathogenic process, as indicated by the correlation with illness severity scores.
- The study did not establish a significant relationship between BAL ICAM-1 and specific pulmonary diagnoses or common risk factors like smoking or P. carinii infection in this cohort.
Background:
The objective of this study was to assess the value of intercellular adhesion molecule-1 (ICAM-1) levels in bronchoalveolar lavage (BAL) specimens.
Methods:
BALs from 44 unselected patients undergoing routine diagnostic bronchoscopy with bronchoalveolar lavage were studied. Cell-free supernatants of the BAL specimens were frozen at -70 degrees C until tested. BAL ICAM-1 concentration was measured using enzyme immunoassay and degree of patient illness assessed by modified APACHE II scores.
Results:
ICAM-1 in BAL fluid was positively correlated to the patient illness score (modified APACHE II) at a p value of 0.026. No such association was found between ICAM-1 levels and cigarette use or infection with pneumocystis carinii, although a few individuals in the smoker's group with pulmonary infection had 10-fold elevations of BAL ICAM-1.
Conclusions:
BAL ICAM-1 may relate to the pulmonary pathogenic process as supported by the association between modified APACHE II scores and ICAM-1 values. Specific pulmonary-related diagnosis and BAL ICAM-1 did not produce significant relationships in this study.
