Immunogenicity, safety, and antiphospholipid antibodies after SARS-CoV-2 vaccine in patients with primary antiphospholipid syndrome

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Signorelli, Flavio ; Balbi, Gustavo Guimaraes Moreira ; Aikawa, Nadia E. ; Silva, Clovis A. ; Kupa, Leonard de Vinci Kanda ; Medeiros-Ribeiro, Ana C. ; Yuki, Emily F. N. ; Pasoto, Sandra G. ; Saad, Carla G. S. ; Borba, Eduardo F. ; Seguro, Luciana Parente Costa ; Pedrosa, Tatiana ; Oliveira, Vitor Antonio de Angeli ; Costa, Ana Luisa Cerqueira de Sant'Ana ; Ribeiro, Carolina T. ; Santos, Roseli Eliana Beseggio ; Andrade, Danieli Castro Oliveira ; Bonfa, Eloisa

• Document type: Journal article
• Source: Lupus; v. 31, n. 8, p. 11-pg., 2022-05-20.

Abstract

Objective Coronavirus disease 19 (COVID-19) has an increased risk of coagulopathy with high frequency of antiphospholipid antibodies (aPL). Recent reports of thrombosis associated with adenovirus-based vaccines raised concern that SARS-CoV-2 immunization in primary antiphospholipid syndrome (PAPS) patients may trigger clotting complications. Our objectives were to assess immunogenicity, safety, and aPL production in PAPS patients, after vaccinating with Sinovac-CoronaVac, an inactivated virus vaccine against COVID-19. Methods This prospective controlled phase-4 study of PAPS patients and a control group (CG) consisted of a two-dose Sinovac-CoronaVac (D0/D28) and blood collection before vaccination (D0), at D28 and 6 weeks after second dose (D69) for immunogenicity/aPL levels. Outcomes were seroconversion (SC) rates of anti-SARS-CoV-2 S1/S2 IgG and/or neutralizing antibodies (NAb) at D28/D69 in naive participants. Safety and aPL production were also assessed. Results We included 44 PAPS patients (31 naive) and 132 CG (108 naive) with comparable age (p=0.982) and sex (p>0.999). At D69, both groups had high and comparable SC (83.9% vs. 93.5%, p=0.092), as well as NAb positivity (77.4% vs. 78.7%, p=0.440), and NAb-activity (64.3% vs. 60.9%, p=0.689). Thrombotic events up to 6 months or other moderate/severe side effects were not observed. PAPS patients remained with stable aPL levels throughout the study at D0 vs. D28 vs. D69: anticardiolipin (aCL) IgG (p=0.058) and IgM (p=0.091); anti-beta-2 glycoprotein I (a beta 2GPI) IgG (p=0.513) and IgM (p=0.468). Conclusion We provided novel evidence that Sinovac-CoronaVac has high immunogenicity and safety profile in PAPS. Furthermore, Sinovac-CoronaVac did not trigger thrombosis nor induced changes in aPL production. (AU)

• FAPESP's process: 19/17272-0 - Relevance of monitoring blood levels compared to salivar levels of drugs used in rheumatic autoimmune diseases: adherence and understanding the possible underlying mechanisms involved in effectiveness and in adverse effects
• Grantee: Leonard de Vinci Kanda Kupa
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 15/03756-4 - Assessment of relevance of blood levels of drugs in the monitoring rheumatic autoimmune diseases: safety, effectiveness and adherence to therapy
• Grantee: Eloisa Silva Dutra de Oliveira Bonfá
• Support Opportunities: Research Projects - Thematic Grants