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Severe acute respiratory syndrome coronavirus 2 mRNA vaccination has reduced effectiveness in certain immunocompromised individuals. However, the cellular mechanisms underlying these defects, as well as the contribution of disease-induced cellular abnormalities, remain largely unexplored. In this study, we conducted a comprehensive serological and cellular analysis of patients with autoimmune systemic lupus erythematosus (SLE) who received the Wuhan-Hu-1 monovalent mRNA coronavirus disease 2019 vaccine. Our findings revealed that patients with SLE exhibited reduced avidity of anti-receptor-binding domain antibodies, leading to decreased neutralization potency and breadth. We also observed a sustained anti-spike response in IgD - CD27 - 'double-negative (DN)' DN2/DN3 B cell populations persisting during memory responses and with greater representation in the SLE cohort. Additionally, patients with SLE displayed compromised anti-spike T cell immunity. Notably, low vaccine efficacy strongly correlated with higher values of a newly developed extrafollicular B and T cell score, supporting the importance of distinct B cell endotypes. Finally, we found that anti-BAFF blockade through belimumab treatment was associated with poor vaccine immunogenicity due to inhibition of naive B cell priming and an unexpected impact on circulating T follicular helper cells., Competing Interests: Competing interests: F.E.-H.L. is the founder of MicroB-plex, Inc., and has research grants with Genentech. I.S. has research grants with Glaxo Smith Kline. The other authors declare no competing interests., (© 2024. The Author(s).)

Background: Biologic therapies inhibiting the IL-4 or IL-5 pathways are very effective in the treatment of asthma and other related conditions. However, the cytokines IL-4 and IL-5 also play a role in the generation of adaptive immune responses. Although these biologics do not cause overt immunosuppression, their effect in primary severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) immunization has not been studied completely., Objective: Our aim was to evaluate the antibody and cellular immunity after SARS-CoV-2 mRNA vaccination in patients on biologics (PoBs)., Methods: Patients with severe asthma or atopic dermatitis who were taking benralizumab, dupilumab, or mepolizumab and had received the initial dose of the 2-dose adult SARS-CoV-2 mRNA vaccine were enrolled in a prospective, observational study. As our control group, we used a cohort of immunologically healthy subjects (with no significant immunosuppression) who were not taking biologics (NBs). We used a multiplexed immunoassay to measure antibody levels, neutralization assays to assess antibody function, and flow cytometry to quantitate Spike-specific lymphocytes., Results: We analyzed blood from 57 patients in the PoB group and 46 control subjects from the NB group. The patients in the PoB group had lower levels of SARS-CoV-2 antibodies, pseudovirus neutralization, live virus neutralization, and frequencies of Spike-specific B and CD8 T cells at 6 months after vaccination. In subgroup analyses, patients with asthma who were taking biologics had significantly lower pseudovirus neutralization than did subjects with asthma who were not taking biologics., Conclusion: The patients in the PoB group had reduced SARS-CoV-2-specific antibody titers, neutralizing activity, and virus-specific B- and CD8 T-cell counts. These results have implications when considering development of a more individualized immunization strategy in patients who receive biologic medications blocking IL-4 or IL-5 pathways., Competing Interests: Disclosure statement Supported by the National Institutes of Health (NIH)/National Institute of Allergy and Infectious Diseases (NIAID) (grants NIH/NHLBI T32HL116271 [to M.C.R., P.A.L., and N.S.]; the National Center for Advancing Translational Sciences of the NIH (UL1TR002378 [to N.S.]; P01AI125180 [to I.S. and F.E.L.]; U54CA260563 [to I.S. and F.E.L.]; R01AI121252 [to F.E.L.]; R01AI172254 [to F.E.L.]; U01AI141993 [to F.E.L.]; and NIH P51OD011132, 1U54CA260563, and the NIH/NIAID Centers of Excellence for Influenza Research and Response (under contract 75N93021C00017 to Emory University). This work does not necessarily represent the views of the US government or Department of Veterans Affairs. Disclosure of potential conflict of interest: N. S. Haddad is employed by MicroB-plex, Inc, but did not receive any payments for this article. C. Swenson receives compensation and consulting fees from Insmed, Inc, that are unrelated to this article. F. Holguin is a member of the adjudication committee of the ASPEN (A Study to Assess the Efficacy, Safety, and Tolerability of Brensocatib in Participants With Non-Cystic Fibrosis Bronchiectasis) trial at Insmed, Inc. J. D. Roback received funding from an NIH grant in the past 36 months. I. Sanz receives royalties from BLI INC for plasma cell survival media; consulting fees from GSK, Pfizer, Kayverna, Johnson & Johnson, Celgene, Bristol-Myer Squibb, and Visterra; and honoraria for presentations from Yale and Harvard Universities. In addition, I. Sanz has a patent on plasma cell survival media. F. Eun-Hyung Lee receives or has received research grants from Genentech and the Gates Foundation; royalties from BLI INC for plasma cell survival media; consulting fees from Be Bio Pharma; honoraria for presentations at the University of Pennsylvania, the University of Cincinnati, and the Gerontological Advanced Practice Nurses Association; has patents on plasma cell survival media and media of elaborated newly synthesized antibodies (MENSA); and is the founder and owner of MicroB-plex, Inc. The rest of the authors declare that they have no relevant conflicts of interest., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)

Post-acute sequelae of SARS-CoV-2 (SARS2) infection (PASC) is a heterogeneous condition, but the main viral drivers are unknown. Here, we use MENSA, Media Enriched with Newly Synthesized Antibodies, secreted exclusively from circulating human plasmablasts, to provide an immune snapshot that defines the underlying viral triggers. We provide proof-of-concept testing that the MENSA technology can capture the new host immune response to accurately diagnose acute primary and breakthrough infections when known SARS2 virus or proteins are present. It is also positive after vaccination when spike proteins elicit an acute immune response. Applying the same principles for long-COVID patients, MENSA is positive for SARS2 in 40% of PASC vs none of the COVID recovered (CR) patients without any sequelae demonstrating ongoing SARS2 viral inflammation only in PASC. Additionally, in PASC patients, MENSAs are also positive for Epstein-Barr Virus (EBV) in 37%, Human Cytomegalovirus (CMV) in 23%, and herpes simplex virus 2 (HSV2) in 15% compared to 17%, 4%, and 4% in CR controls respectively. Combined, a total of 60% of PASC patients have a positive MENSA for SARS2, EBV, CMV, and/or HSV2. MENSA offers a unique antibody snapshot to reveal the underlying viral drivers in long-COVID thus demonstrating the persistence of SARS2 and reactivation of viral herpes in 60% of PASC patients., Competing Interests: Declaration of Potential Conflicts of Interest FEL is the founder of MicroB-plex, Inc. and serves on the scientific board of Be Biopharma, is a recipient of grants from the BMGF and Genentech, Inc., and has served as a consultant for Astra Zeneca. NSH and AMP were scientists at MicroB-plex, Inc., Atlanta, GA and JLD is a scientist at MicroB-plex, Inc., Atlanta, GA. IS has consulted for GSK, Pfizer, Kayverna, Johnson & Johnson, Celgene, Bristol Myer Squibb, and Visterra. FEL, DN, and IS are inventors of the patents concerning the plasma cell survival media related to this work (issued 9/21/21, US 11,124766 B2 PCT/US2016/036650; and issued 9/21/21, US 11,125757 B2). FEL & JLD are inventors of MENSA patent U.S. Patent No. 10,247,729. April 2, 2019. FEL, NSH, JLD, & IS are inventors of the MENSA PASC diagnostic provisional patent, March 28, 2024. All other authors have declared that no conflict of interest exists.

Novel mRNA vaccines have resulted in a reduced number of SARS-CoV-2 infections and hospitalizations. Yet, there is a paucity of studies regarding their effectiveness on immunocompromised autoimmune subjects. In this study, we enrolled subjects naïve to SARS-CoV-2 infections from two cohorts of healthy donors (HD, n=56) and systemic lupus erythematosus (SLE, n=69). Serological assessments of their circulating antibodies revealed a significant reduction of potency and breadth of neutralization in the SLE group, only partially rescued by a 3 rd booster dose. Immunological memory responses in the SLE cohort were characterized by a reduced magnitude of spike-reactive B and T cell responses that were strongly associated with poor seroconversion. Vaccinated SLE subjects were defined by a distinct expansion and persistence of a DN2 spike-reactive memory B cell pool and a contraction of spike-specific memory cTfh cells, contrasting with the sustained germinal center (GC)-driven activity mediated by mRNA vaccination in the healthy population. Among the SLE-associated factors that dampened the vaccine responses, treatment with the monoclonal antibody anti-BAFF/Belimumab (a lupus FDA-approved B cell targeting agent) profoundly affected the vaccine responsiveness by restricting the de novo B cell responses and promoting stronger extra-follicular (EF)-mediated responses that were associated with poor immunogenicity and impaired immunological memory. In summary, this study interrogates antigen-specific responses and characterized the immune cell landscape associated with mRNA vaccination in SLE. The identification of factors associated with reduced vaccine efficacy illustrates the impact of SLE B cell biology on mRNA vaccine responses and provides guidance for the management of boosters and recall vaccinations in SLE patients according to their disease endotype and modality of treatment., Competing Interests: Competing interests F.E.L. is the founder of MicroB-plex, Inc., and has research grants with Genentech.