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• W3036208326 abstract "Abstract Background Critically ill patients with coronavirus disease 2019 (COVID-19) have a profound hypercoagulable state and often develop coagulopathy which leads to organ failure and death. Because of a prolonged activated partial-thromboplastin time (aPTT), a relationship with anti-phospholipid antibodies (aPL) has been proposed, but results are controversial. Functional assays for aPL (i.e., lupus anticoagulant) can be influenced by concomitant anticoagulation and/or high levels of C reactive protein. The presence of anti-cardiolipin (aCL), anti-beta2-glycoprotein I (anti-β 2 GPI) and anti-phosphatidylserine/prothrombin (aPS/PT) antibodies was not investigated systematically. Epitope specificity of anti-β 2 GPI antibodies was not reported. Objective To evaluate the prevalence and the clinical association of aPL in a large cohort of COVID-19 patients, and to characterize the epitope specificity of anti-β 2 GPI antibodies. Methods ELISA and chemiluminescence assays were used to test 122 sera of patients suffering from severe COVID-19. Of them, 16 displayed major thrombotic events. Results Anti-β 2 GPI IgG/IgA/IgM were the most frequent in 15.6/6.6/9.0% of patients, while aCL IgG/IgM were detected in 5.7/6.6% by ELISA. Comparable values were found by chemiluminescence. aPS/PT IgG/IgM were detectable in 2.5 and 9.8% by ELISA. No association between thrombosis and aPL was found. Reactivity against domain 1 and 4-5 of β 2 GPI was limited to 3/58 (5.2%) tested sera for each domain and did not correlate with aCL/anti-β 2 GPI nor with thrombosis. Conclusions aPL show a low prevalence in COVID-19 patients and are not associated with major thrombotic events. aPL in COVID-19 patients are mainly directed against β 2 GPI but display an epitope specificity different from antibodies in antiphospholipid syndrome." @default.
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• W3036208326 date "2020-06-19" @default.
• W3036208326 modified "2023-10-05" @default.
• W3036208326 title "Anti-phospholipid antibodies in COVID-19 are different from those detectable in the anti-phospholipid syndrome" @default.
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• W3036208326 doi "https://doi.org/10.1101/2020.06.17.20134114" @default.
• W3036208326 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7310661" @default.
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