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International Journal of Endocrinology and Metabolism

Research Institute for Endocrine Sciences

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Vascular Cell Adhesion Molecule-l (VCAM-l) in Graves' Disease: Its Association to Thyroid Status and Thyroid Receptor Stimulating Antibodies

Author(s):
Wan Nazaimoon WMWan Nazaimoon WM1,*, Ismail ISIsmail IS2, Tan HJTan HJ3, Kamaruddin NAKamaruddin NA3, Khalid AKKhalid AK3
1Institute for Medical Research, [email protected], Malaysia
2University Malaya Medical Center, Malaysia
3Faculty of Medicine, Universiti Kebangsaan, Malaysia
International Journal of Endocrinology and Metabolism:Vol. 2, issue 2; 66-73
Published online:Jan 01, 2004
Article type:Research Article
How to Cite:Nazaimoon WM W, IS I, HJ T, NA K, AK K. Vascular Cell Adhesion Molecule-l (VCAM-l) in Graves' Disease: Its Association to Thyroid Status and Thyroid Receptor Stimulating Antibodies. Int J Endocrinol Metab. 2004;2(2):. doi:

Abstract

Materials and Methods:

Patients were given fixed daily dose of 20 mg carbimazole for 3 months and blood samples were collected at baseline and end of the study. Thirty-eight patients were recruited from the Endocrine Clinic, Hospital Universiti Kebangsaan Malaysia, consisting of 26 females and 12 males, age ranging from 16 to 65 years. Blood samples collected before and at end of study were analysed for TSH, Free TJ, Free T4J thyroid receptor stimulating antibodies (TRAb), sVCAM-1, sICAM-1 and lL-6.

Results:

TRAb level of ?10 to U/L was taken to be negative, while TRAb level of >10 U/L was considered as positive. Twenty-six patients (68%) were TRAb positive (TRAb+) and 12 patients (30%) were TRAb negative (TRAb-). Median TRAb in TRAb+ patients was 23 UIL at baseline, declining to 16.7 U/L (p<0.00l) in the third 3 month. Sexum sVCAM-1 levels were significantly elevated in TRAb+ patients compared to TRAb-(860 versus 499 nglmL, p<0.00l). The level decreased significantly to 537 nglmL with treatment but remained higher than in TRAb-patients (p=0.003). Irrespective of TRAb status, all but one patient had elevated serum sICAM-l levels that remained unaffected by carbimazole therapy. In contrast, IL-6 levels of hyperthyroid patients were within the reference range of 1.+14.1 pglmL. Baseline and post-treatment sVCAM-l, and not TRAb levels, were significantly correlated to thyroid hormones.

Conclusion:

Compared to other inflammatory markers, sVCAM-l showed significant correlation to thyrOid stimulating antibodies and was most sensitive to changes in thyroid status. The significance of these findings in relation to Graves' disease warrants further investigation.

Keywords
VCAM-1
Graves
disease
TRAb
Inflammation

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