title: [Selected markers of endothelial dysfunction in patients with subclinical and overt hyperthyroidism].
abstract: BACKGROUND
  There are many factors causing endothelial dysfunction. The aim was to observe chosen markers of endothelial function in patients with subclinical and overt hyperthyroidism.
  
  
  METHODS
  We studied 97 patients with hyperthyroidism: 51 with subclinical (44 F/7 M; mean age 49.3 +/- 15.9 y) and 46 patients with overt (39 F/7 M, mean age 50.4 +/- 13.2 y). The control comprised of 39 healthy volunteers (26 F/13 M, mean age 47.5 +/- 11.8 y). Concentration of TSH, FT3, FT4 were measured by MEIA, TPO Ab, TG Ab, E-selectin, interleukin 6, VCAM-1, ICAM-1 by ELISA.
  
  
  RESULTS
  The goiter was found in 71 persons 63F/8M, mean age 49.9 +/- 15.3 y, (42-subclinical, 29-overt). Morbus Graves-Basedow was diagnosed in 26 persons, 20 F/6 M, mean age 49.5 +/- 12.8 y (9-subclinical, 17-overt). There were no significant differences serum concentration of E-selectin, IL-6, ICAM-1 in patients with subclinical and overt hyperthyroidism compared to the control. Statistically significant differences were shown between concentration of IL-6 in patients with Graves-Basedow compared with the control (p < 0.05). Significance of VCAM-1 values were found in the patients with subclinical and overt hyperthyroidism compared to the control (p < 0.001; p < 0.001, respectively).
  
  
  CONCLUSIONS
  Among persons with overt and subclinical hyperthyroidism occurs endothelial dysfunction which doesn't depends on exciting cause of thyrotoxicosis but on degree of hyperthyroidism. Elevated concentrations of endothelial markers may confirm that persons with thyroid disorders are extremely exposed to the occurrence of the cardiovascular diseases.
authors.affiliation: Department of Endocrinology, Diabetology and Internal Medicine, Medical University, Białystok. abalbi@op.pl
authors.forename: Anna
authors.initials: A
authors.lastname: Modzelewska
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Szelachowska
authors.forename: Anna
authors.initials: A
authors.lastname: Zonenberg
authors.forename: Saeid
authors.initials: S
authors.lastname: Abdelrazek
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Nikołajuk
authors.forename: Maria
authors.initials: M
authors.lastname: Górska
mesh_terms: D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000378:metabolism; D002318:Cardiovascular Diseases / Q000453:epidemiology*; D015815:Cell Adhesion Molecules / Q000097:blood; D015897:Comorbidity; D042783:Endothelial Cells / Q000378:metabolism*; D004730:Endothelium, Vascular / Q000378:metabolism / Q000503:physiopathology*; D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000097:blood / Q000453:epidemiology* / Q000503:physiopathology*; D015850:Interleukin-6 / Q000097:blood; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D013960:Thyroid Function Tests; D019010:Vascular Cell Adhesion Molecule-1 / Q000097:blood
chemical_list: D015415:Biomarkers; D015815:Cell Adhesion Molecules; D015850:Interleukin-6; D019010:Vascular Cell Adhesion Molecule-1