Journal
ENDOCRINE
Volume 74, Issue 2, Pages 349-354Publisher
SPRINGER
DOI: 10.1007/s12020-021-02769-z
Keywords
Antiphospholipid antibodies; Apolipoproteins; Autoimmune thyroid diseases; Interleukine 6; Graves' orbitopathy
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Funding
- Ministry of Science, Education and Technological Development of the Republic of Serbia [451-03-68/2020-14/200161]
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This study is the first report of the presence of aPL Abs in GO patients. The anti-thyroid Abs were linked to aPL, suggesting larger studies are necessary to confirm potential cause-effect relations.
Purpose Graves' orbitopathy (GO) is an inflammatory autoimmune disorder of the orbit and while the antiphospholipid antibodies (aPL) Abs were associated with the markers of inflammation in the antiphospholipid syndrome (APS), there is no literature that investigate the presence of aPL Abs in GO. We analyzed the prevalence of aPL Abs and the differences between aPL (+) and aPL (-) subgroups of GO patients. Methods Study included consecutive patients with GO (66 with Graves' (GD), 10 with Hashimoto (HD), and 8 were euthyroid). Anticardiolipin (aCL) and anti-beta 2glycoprotein I (a beta 2gpI) Abs were measured by ELISA. Results aPL Abs were present in 9/84 (10.71%) patients. The IgM a beta 2gpI Abs were present in 8/66 and in 1/10 patients with GD and HD. The IgG aCL Abs were present in one GD patient, and IgM aCL were present in 3/66 GD and in 1/10 patients with HD. In GD group, anti-Tg Abs were in positive correlation with a beta 2gpI IgG (p = 0.000) and with anti-TPO Abs (p = 0.016). In HD group, anti-Tg Abs were in positive correlation with IgM aCL (p = 0.042), while anti-TPO Abs were in positive correlation with a beta 2gpI IgM (p = 0.014). Conclusion This study is the first report of the aPL Abs presence in GO patients. The anti-thyroid Abs were linked to aPL suggesting that their presence is not the sole consequence of hyperstimulation of autoreactive B-lymphocytes. Larger studies are necessary to confirm potential cause-effect relations.
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