1. Tixagevimab/cilgavimab for the prevention of COVID-19 in vaccine-refractory patients with autoimmune diseases: a prospective cohort study.
- Author
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Minopoulou, Ioanna, Tascilar, Koray, Corte, Giulia, Mutlu, Melek Yalcin, Schmidt, Katja, Bohr, Daniela, Hartmann, Fabian, Manger, Karin, Manger, Bernhard, Korn, Klaus, Kleyer, Arnd, Simon, David, Harrer, Thomas, Schett, Georg, and Fagni, Filippo
- Subjects
SALIVA analysis ,THERAPEUTIC use of monoclonal antibodies ,IMMUNOGLOBULIN analysis ,RISK assessment ,IMMUNIZATION ,RESEARCH funding ,DRUG resistance in microorganisms ,IMMUNOGLOBULINS ,DESCRIPTIVE statistics ,LONGITUDINAL method ,ODDS ratio ,MONOCLONAL antibodies ,AUTOIMMUNE diseases ,CONFIDENCE intervals ,COVID-19 ,IMMUNOLOGIC diseases ,DISEASE incidence ,DISEASE risk factors - Abstract
Objectives To investigate the effects of passive immunization with the anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) monoclonal antibodies tixagevimab/cilgavimab on humoral responses and on coronavirus disease 2019 (COVID-19) outcomes in vaccine-refractory patients with immune-mediated inflammatory diseases (IMIDs) at high risk of severe COVID-19. Methods A prospective cohort study was performed on a cohort of high-risk vaccine-refractory IMID patients treated with a single dose of tixagevimab/cilgavimab (150 mg/150 mg). COVID-19 outcomes as well as serum and salivary anti-SARS-CoV-2 IgG were assessed at baseline and for at least 6 months. Results were compared with an untreated high-risk vaccine-refractory IMID population. Standardized incidence ratios (SIRs) of COVID-19 compared with the general population were calculated for both groups. Results A total of 38 high-risk IMID patients received tixagevimab/cilgavimab and were compared with 114 untreated high-risk IMID controls. Serum anti-spike IgG increased to 6.6 OD (s. d. 0.8) at day 1 and remained positive up to month 6 [6.3 OD (s. d. 1.4)]. Salivary anti-spike IgG peaked at month 2 [1.6 OD (s. d. 1.1)] and decreased from month 3 [0.8 OD (s. d. 0.3)]. No severe or extended infection was observed in the tixagevimab/cilgavimab group. Compared with the general population, the SIR of COVID-19 in treated patients was 0.76 (95% CI 0.24, 1.58) despite the increased risk profile. The SIR of the control group was 1.51 (95% CI 1.07, 2.02), corresponding to a significantly increased incidence. Conclusions Passive immunization with tixagevimab/cilgavimab is safe and effective in inducing anti-SARS-CoV-2 immunity and potentially in preventing COVID-19 in high-risk vaccine-refractory IMID patients. These data provide a proof of concept for the use of monoclonal antibodies as a preventative strategy against SARS-CoV-2 in vulnerable populations. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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