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Hypothyroidism and anti-endothelial cell antibodies
A G Wangel1, S Kontiainen, L Melamies
1Department of Bacteriology and Immunology, University of Helsinki, Finland.
Summary
Anti-endothelial cell antibodies (AECA) are more prevalent in patients with abnormal thyroid function, particularly those with hypothyroidism. A significant correlation exists between AECA levels and thyroid-stimulating hormone (TSH).
Area of Science:
- Endocrinology
- Immunology
- Vascular Biology
Background:
- Previous studies identified anti-endothelial cell antibodies (AECA) in insulin-dependent diabetes mellitus and linked them to thyroid disease.
- Endothelial cell dysfunction is implicated in various autoimmune and metabolic disorders.
Purpose of the Study:
- To investigate the prevalence of AECA in patients with suspected thyroid dysfunction.
- To determine the association between AECA and thyroid function parameters, specifically TSH and free thyroxine (fT4).
Main Methods:
- Enzyme immunoassay (EIA) was employed to detect AECA.
- Human umbilical vein endothelial cells served as the substrate for the immunoassay.
- Patient cohorts included those with normal and abnormal thyroid function.
Main Results:
- AECA were detected in 4.2% of patients with normal thyroid function and 15.4% with abnormal function.
- A significant association was found between AECA presence and elevated TSH levels.
- AECA prevalence was significantly higher in patients with hypothyroidism (high TSH) compared to those with low or normal TSH.
Conclusions:
- A strong correlation exists between AECA levels and TSH, suggesting a potential role in thyroid dysfunction pathogenesis.
- AECA are significantly more common in patients with hypothyroidism.
- The study highlights a link between endothelial cell autoimmunity and thyroid disease, warranting further investigation.