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[Serum concentrations of soluble adhesion molecules sICAM-1 and sVCAM-1 in patients with malignant ENT tumors].

BACKGROUND
Adhesion molecules are implicated in various stages of tumor progression and metastasis. Soluble forms of intercellular adhesion molecule-1 (sICAM-1) and vascular cell adhesion molecule-1 (sVCAM-1) were recently described. The aim of this study was to determine a differences in concentration of these molecules in patients with head and neck squamous cell carcinoma (HNSCC) compared to healthy controls.


PATIENTS AND METHODS
We investigated the circulating levels of sICAM-1 and sVCAM-1 in sera from patients with various head and neck squamous cell carcinomas (n = 52) as well as from normal, healthy controls (n = 35). Serum concentrations were determined as serum immunoreactivity by using a quantitative sandwich enzyme immunoassay technique. For statistical analysis, the Student's t-test was performed.


RESULTS
The majority of the patients with HNSCC were found to have high concentrations of sICAM-1 and sVCAM-1. The mean level of sICAM-1 in patients was 313 ng/ml and in the control group 237 ng/ml (p = 0.0005). The mean level of sVCAM-1 in patients was 624 ng/ml and in the control group 435 ng/ml (p = 0.009). The concentrations of sICAM-1 and sVCAM-1 were significantly higher in HNSCC patients.


CONCLUSIONS
These results show the difference in expression of these adhesion molecules in patients with HNSCC compared to healthy controls. Endothelial adhesion molecule determination may find clinical applications in the follow-up of cancer therapy. For this reason, studies incorporating the longitudinal follow-up of patients are required.