Serum levels of IGF-I, HGF, TGFbeta1, bFGF and VEGF in thyroid gland tumors.
IGF-I, HGF, TGFbeta1, bFGF and VEGF are involved in the pathogenesis of thyroid gland tumors and their growth. We decided to find whether changes in the production of these cytokines by thyroid tumor cells are reflected by changes of their peripheral blood. Using ELISA kits, we measured the concentrations of growth factors in the peripheral blood serum in 28 patients with thyroid gland tumors (14 adenomas, 14 papillary carcinomas) and compared these concentrations with those in healthy people. We found significantly lower serum levels of IGF-I in patients with thyroid adenoma compared to the healthy population. Serum levels of HGF and bFGF were significantly higher in patients with thyroid adenoma and papillary carcinoma compared with those in healthy subjects. Serum concentrations of TGFbeta1 and VEGF were not significantly different in any groups of investigated subjects. Changes in the production of these cytokines by thyroid gland tumor cells are reflected in their peripheral blood levels, but these levels also depend on a number of other physiological and pathological processes in the organism. However, significant differences of HGF and bFGF serum levels can be explained by their very high production by thyroid tumor cells and by their strong effect on the follicular and endothelial cell proliferation.
Department of Otorhinolaryngology, Head and Neck Surgery, First Medical Faculty, Charles University, University Hospital Motol, Prague, Czech Republic. david_vesely@hotmail.com
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D000236:Adenoma / Q000097:blood*; D014408:Biomarkers, Tumor / Q000097:blood; D002291:Carcinoma, Papillary / Q000097:blood*; D005260:Female; D016222:Fibroblast Growth Factor 2 / Q000097:blood; D006133:Growth Substances / Q000097:blood*; D017228:Hepatocyte Growth Factor / Q000097:blood; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000378:metabolism; D008297:Male; D009389:Neovascularization, Pathologic / Q000097:blood; D013964:Thyroid Neoplasms / Q000097:blood*; D016212:Transforming Growth Factor beta / Q000097:blood; D053773:Transforming Growth Factor beta1; D042461:Vascular Endothelial Growth Factor A / Q000097:blood
D014408:Biomarkers, Tumor; D006133:Growth Substances; C508960:TGFB1 protein, human; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D042461:Vascular Endothelial Growth Factor A; D016222:Fibroblast Growth Factor 2; D017228:Hepatocyte Growth Factor; D007334:Insulin-Like Growth Factor I