Soluble intracellular adhesion molecules (sICAM-1, sVCAM-1) in peripheral blood of patients with thyroid cancer.

The growth of a neoplasm and its ability to form metastases is a multistep process dependent on angiogenesis and immunological reactions of the organism. In this process adhesive factors are also involved. The aim of this work was estimation of the concentration of soluble intercellular adhesion molecules (sICAM-1) and vascular cellular adhesion molecules (sVCAM-1) in the serum of peripheral blood of patients with thyroid cancer before operation. The study comprised 48 patients ( 38 women and 10 men) aged from 18 to 87 years, in whom thin needle aspiration biopsy revealed cancer of the thyroid. Postoperative histopathological examination showed papillary cancer in 35 patients, oxyphilic cancer in 5 patients, anaplastic cancer in 4 and medullary cancer in 4 patients. In those patients, using the immunoenzymatic method ELISA, the concentration of sICAM-1 and sVCAM-1 in the serum of peripheral blood was determined. The control group comprised 26 healthy persons. We found statistically significant increase of sICAM-1 concentration in serum in all forms of cancer, in comparison with the control group. Mean concentrations of sICAM-1 were as follows: in papillary cancer patients 455.23+/-28.66 vs. 299.62+/-11.54 ng/ml, p<0.05; in oxyphilic cancer 455.60+/-95.21 vs. 299.62+/-11.54 ng/ml, p<0.05; in anaplastic cancer 570.00+/-170.89 vs. 299.62+/-11.54 ng/ml, p<0.05; and in medullary cancer 512.00+/-11.46 vs. 299.62+/-11.54 ng/ml, p<0.05. The mean concentration of sVCAM-1 in serum was statistically significantly higher than in the control group only in case of anaplastic cancer (1033.75+/-86.30 vs. 644.58+/-27.30 ng/ml; p<0.05). We evaluated the correlation coefficient between the concentration of sICAM-1 and sVCAM-1 in the serum of patients with thyroid cancer. Positive correlation was observed between the concentration of sICAM-1 and sVCAM-1. The obtained results confirm essential role of the investigated adhesive factors in the process of thyroid cancer growth.