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del Pino Molina L, Bravo Gallego LY, Nozal P, Soto-Serrano Y, Martínez-Feito A, Reche-Yebra K, González-Torbay A, Cuesta-Martín de la Cámara R, Gianelli C, Cámara C, González-García J, González-Muñoz M, Rodríguez-Pena R, López Granados E. Detection of specific RBD + IgG + memory B cells by flow cytometry in healthcare workers and patients with inborn errors of immunity after BNT162b2 m RNA COVID-19 vaccination. Front Immunol 2023; 14:1136308. [PMID: 37215146 PMCID: PMC10192857 DOI: 10.3389/fimmu.2023.1136308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 04/13/2023] [Indexed: 05/24/2023] Open
Abstract
Introduction Inborn errors of immunity (IEI) are a heterogeneous group of diseases caused by intrinsic defects of the immune system. Estimating the immune competence of immunocompromised patients for an infection risk assessment or after SARS-CoV-2 vaccination constituted a challenge. Methods The aim of this study was to determine the humoral responses of patients with IEI through a comprehensive analysis of specific receptor-binding domain-positive (RBD+) IgG+ memory B cells (MBCs) by flow cytometry, together with routine S-specific IgG antibodies and QuantiFERON SARS-CoV-2 (T-cell response), before the vaccine and 3 weeks after a second dose. Results and discussion We first analyzed the percentage of specific RBD+ IgG+ MBCs in healthy healthcare workers. Within the control group, there was an increase in the percentage of specific IgG+ RBD+ MBCs 21 days after the second dose, which was consistent with S-specific IgG antibodies.Thirty-one patients with IEI were included for the pre- and post-vaccination study; IgG+ RBD+ MBCs were not evaluated in 6 patients due to an absence of B cells in peripheral blood. We detected various patterns among the patients with IEI with circulating B cells (25, 81%): an adequate humoral response was observed in 12/25, consider by the detection of positive S-specific IgG antibodies and the presence of specific IgG+ RBD+ MBCs, presenting a positive T-cell response; in 4/25, very low S-specific IgG antibody counts correlated with undetectable events in the IgG+ RBD+ MBC compartment but with positive cellular response. Despite the presence of S-specific IgG antibodies, we were unable to detect a relevant percentage of IgG+ RBD+ MBCs in 5/25; however, all presented positive T-cell response. Lastly, we observed a profound failure of B and T-cell response in 3 (10%) patients with IEI, with no assessment of S-specific IgG antibodies, IgG+ RBD+ MBCs, and negative cellular response. The identification of specific IgG+ RBD+ MBCs by flow cytometry provides information on different humoral immune response outcomes in patients with IEI and aids the assessment of immune competence status after SARS-CoV-2 mRNA vaccine (BNT162b2), together with S-specific IgG antibodies and T-cell responses.
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Affiliation(s)
- Lucía del Pino Molina
- Center for Biomedical Network Research on Rare Diseases (CIBERER U767), ISCIII, Madrid, Spain
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | - Luz Yadira Bravo Gallego
- Center for Biomedical Network Research on Rare Diseases (CIBERER U767), ISCIII, Madrid, Spain
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | - Pilar Nozal
- Clinical Immunology Department, La Paz University Hospital, Madrid, Spain
- Center for Biomedical Network Research on Rare Diseases (CIBERER U754), ISCIII, Madrid, Spain
- Complement Research Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | - Yolanda Soto-Serrano
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | - Ana Martínez-Feito
- Clinical Immunology Department, La Paz University Hospital, Madrid, Spain
- Immuno-Rheumatology Research Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | - Keren Reche-Yebra
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | | | | | - Carla Gianelli
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
- Clinical Immunology Department, La Paz University Hospital, Madrid, Spain
| | - Carmen Cámara
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
- Clinical Immunology Department, La Paz University Hospital, Madrid, Spain
| | - J. González-García
- HIV Unit, Internal Medicine Department, La Paz University Hospital, AIDS and Infectious Diseases Group, Center for Biomedical Network Research on Infectious Diseases (CIBERINFEC CB21/13/00039), La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | | | - Rebeca Rodríguez-Pena
- Center for Biomedical Network Research on Rare Diseases (CIBERER U767), ISCIII, Madrid, Spain
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
- Clinical Immunology Department, La Paz University Hospital, Madrid, Spain
| | - Eduardo López Granados
- Center for Biomedical Network Research on Rare Diseases (CIBERER U767), ISCIII, Madrid, Spain
- Lymphocyte Pathophysiology in Immunodeficiencies Group, La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
- Clinical Immunology Department, La Paz University Hospital, Madrid, Spain
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