1
|
Sarrigeorgiou I, Moschandreou D, Dimitriadis A, Tsinti G, Sotiropoulou E, Ntoukaki E, Eliadis P, Backovic M, Labropoulou S, Escriou N, Pouliakis A, Giannopoulou G, Gaitanarou E, Lazaridis K, Mentis A, Mamalaki A, Grouzi E, Lymberi P. Combined monitoring of IgG and IgA anti-Spike and anti-Receptor binding domain long term responses following BNT162b2 mRNA vaccination in Greek healthcare workers. PLoS One 2022; 17:e0277827. [PMID: 36409702 PMCID: PMC9678302 DOI: 10.1371/journal.pone.0277827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 11/04/2022] [Indexed: 11/22/2022] Open
Abstract
Studies on the humoral response to homologous BNT162b2 mRNA-vaccination focus mainly on IgG antibody dynamics, while long-term IgA kinetics are understudied. Herein, kinetics of IgG and IgA levels against trimeric-Spike (S) and Receptor-Binding-Domain (RBD) were evaluated by in-house ELISAs in 146 two-dose vaccinated Greek healthcare workers (HCWs) in a 9-month period at six time points (up to 270 days after the first dose). The effect of a homologous booster third dose was also studied and evaluated. The peak of immune response was observed 21 days after the second dose; 100% seroconversion rate for anti-S and anti-RBD IgG, and 99.7% and 96.3% respectively for IgA. IgG antibody levels displayed higher increase compared to IgA. Declining but persistent anti-SARS-CoV-2 antibody levels were detected 9 months after vaccination; IgG and IgA anti-S levels approached those after the first dose, while a more rapid reduction rate for anti-RBD antibodies led to significantly lower levels for both classes, supporting the need for a booster dose. Indeed, a homologous booster third dose resulted in enhanced levels of anti-S of both classes, whereas anti-RBD didn't exceed the peak levels after the second dose. Previous SARS-CoV-2 infection, flu vaccination, BMI<35 and the occurrence of an adverse event upon vaccination, were associated with higher IgG antibody levels over time, which however were negatively affected by age increase and the presence of chronic diseases. Overall, after concurrently using the S and RBD target-antigens in in-house ELISAs, we report in addition to IgG, long-term persistence of IgA antibodies. Regarding antibody levels, homologous mRNA vaccination gives rise to an effective anti-viral protection up to 9 months negatively correlated to age. Considering that COVID-19 is still a matter of public concern, booster vaccine doses remain critical to vulnerable individuals.
Collapse
Affiliation(s)
- Ioannis Sarrigeorgiou
- Immunology Laboratory, Immunology Department, Hellenic Pasteur Institute (HPI), Athens, Greece
| | - Dimitra Moschandreou
- Department of Transfusion Service and Clinical Hemostasis, "Saint Savvas" Oncology Hospital, Athens, Greece
| | | | - Gerasimina Tsinti
- Immunology Laboratory, Immunology Department, Hellenic Pasteur Institute (HPI), Athens, Greece
| | | | - Eleni Ntoukaki
- Immunology Laboratory, Immunology Department, Hellenic Pasteur Institute (HPI), Athens, Greece
| | - Petros Eliadis
- Biotechnology Unit, HPI, Athens, Greece
- Laboratory of Molecular Biology and Immunobiotechnology, HPI, Athens, Greece
| | - Marija Backovic
- Structural Virology Unit, Department of Virology, Institut Pasteur, Paris, 75015, France
| | | | - Nicolas Escriou
- Innovation Lab, Vaccines, Department of Virology, Institut Pasteur, Paris, 75015, France
| | - Abraham Pouliakis
- Second Department of Pathology, National and Kapodistrian University of Athens, "ATTIKON" University Hospital, Athens, Greece
| | - Georgia Giannopoulou
- Department of Transfusion Service and Clinical Hemostasis, "Saint Savvas" Oncology Hospital, Athens, Greece
| | - Eleni Gaitanarou
- Department of Transfusion Service and Clinical Hemostasis, "Saint Savvas" Oncology Hospital, Athens, Greece
| | - Konstantinos Lazaridis
- Immunology Laboratory, Immunology Department, Hellenic Pasteur Institute (HPI), Athens, Greece
| | | | - Avgi Mamalaki
- Biotechnology Unit, HPI, Athens, Greece
- Laboratory of Molecular Biology and Immunobiotechnology, HPI, Athens, Greece
| | - Elisavet Grouzi
- Department of Transfusion Service and Clinical Hemostasis, "Saint Savvas" Oncology Hospital, Athens, Greece
| | - Peggy Lymberi
- Immunology Laboratory, Immunology Department, Hellenic Pasteur Institute (HPI), Athens, Greece
- * E-mail:
| |
Collapse
|
2
|
Seroprevalence of SARS-CoV-2 on health professionals via Bayesian estimation: a Brazilian case study before and after vaccines. Acta Trop 2022; 233:106551. [PMID: 35691330 PMCID: PMC9181309 DOI: 10.1016/j.actatropica.2022.106551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/01/2022] [Accepted: 06/03/2022] [Indexed: 11/20/2022]
Abstract
The increasing number of COVID-19 infections brought by the current pandemic has encouraged the scientific community to analyze the seroprevalence in populations to support health policies. In this context, accurate estimations of SARS-CoV-2 antibodies based on antibody tests metrics (e.g., specificity and sensitivity) and the study of population characteristics are essential. Here, we propose a Bayesian analysis using IgA and IgG antibody levels through multiple scenarios regarding data availability from different information sources to estimate the seroprevalence of health professionals in a Northeastern Brazilian city: no data available, data only related to the test performance, data from other regions. The study population comprises 432 subjects with more than 620 collections analyzed via IgA/IgG ELISA tests. We conducted the study in pre- and post-vaccination campaigns started in Brazil. We discuss the importance of aggregating available data from various sources to create informative prior knowledge. Considering prior information from the USA and Europe, the pre-vaccine seroprevalence means are 8.04% and 10.09% for IgG and 7.40% and 9.11% for IgA. For the post-vaccination campaign and considering local informative prior, the median is 84.83% for IgG, which confirms a sharp increase in the seroprevalence after vaccination. Additionally, stratification considering differences in sex, age (younger than 30 years, between 30 and 49 years, and older than 49 years), and presence of comorbidities are provided for all scenarios.
Collapse
|