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Ghoula M, Deyawe Kongmeneck A, Eid R, Camproux AC, Moroy G. Comparative Study of the Mutations Observed in the SARS-CoV-2 RBD Variants of Concern and Their Impact on the Interaction with the ACE2 Protein. J Phys Chem B 2023; 127:8586-8602. [PMID: 37775095 PMCID: PMC10578311 DOI: 10.1021/acs.jpcb.3c01467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/20/2023] [Indexed: 10/01/2023]
Abstract
SARS-CoV-2 strains have made an appearance across the globe, causing over 757 million cases and over 6.85 million deaths at the time of writing. The emergence of these variants shows the amplitude of genetic variation to which the wild-type strains have been subjected. The rise of the different SARS-CoV-2 variants resulting from such genetic modification has significantly affected COVD-19's major impact on proliferation, virulence, and clinics. With the emergence of the variants of concern, the spike protein has been identified as a possible therapeutic target due to its critical role in binding to human cells and pathogenesis. These mutations could be linked to functional heterogeneity and use a different infection strategy. For example, the Omicron variant's multiple mutations should be carefully examined, as they represent one of the most widely spread strains and hint to us that there may be more genetic changes in the virus. As a result, we applied a common protocol where we reconstructed SARS-CoV-2 variants of concern and performed molecular dynamics simulations to study the stability of the ACE2-RBD complex in each variant. We also carried out free energy calculations to compare the binding and biophysical properties of the different SARS-CoV-2 variants when they interact with ACE2. Therefore, we were able to obtain consistent results and uncover new crucial residues that were essential for preserving a balance between maintaining a high affinity for ACE2 and the capacity to evade RBD-targeted antibodies. Our detailed structural analysis showed that SARS-CoV-2 variants of concern show a higher affinity for ACE2 compared to the Wuhan strain. Additionally, residues K417N and E484K/A might play a crucial role in antibody evasion, whereas Q498R and N501Y are specifically mutated to strengthen RBD affinity to ACE2 and, thereby, increase the viral effect of the COVID-19 virus.
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Affiliation(s)
- Mariem Ghoula
- Université de Paris, CNRS,
INSERM, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
| | - Audrey Deyawe Kongmeneck
- Université de Paris, CNRS,
INSERM, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
| | - Rita Eid
- Université de Paris, CNRS,
INSERM, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
| | - Anne-Claude Camproux
- Université de Paris, CNRS,
INSERM, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
| | - Gautier Moroy
- Université de Paris, CNRS,
INSERM, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
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2
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Kim E, Khan MS, Ferrari A, Huang S, Sammartino JC, Percivalle E, Kenniston TW, Cassaniti I, Baldanti F, Gambotto A. SARS-CoV-2 S1 Subunit Booster Vaccination Elicits Robust Humoral Immune Responses in Aged Mice. Microbiol Spectr 2023; 11:e0436322. [PMID: 37162333 PMCID: PMC10269910 DOI: 10.1128/spectrum.04363-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 04/16/2023] [Indexed: 05/11/2023] Open
Abstract
The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants has raised concerns about reduced vaccine effectiveness and the increased risk of infection, and while repeated homologous booster shots are recommended for elderly and immunocompromised individuals, they cannot completely protect against breakthrough infections. In our previous study, we assessed the immunogenicity of an adenovirus-based vaccine expressing SARS-CoV-2 S1 (Ad5.S1) in mice, which induced robust humoral and cellular immune responses (E. Kim, F. J. Weisel, S. C. Balmert, M. S. Khan, et al., Eur J Immunol 51:1774-1784, 2021, https://doi.org/10.1002/eji.202149167). In this follow-up study, we found that the mice had high titers of anti-S1 antibodies 1 year after vaccination, and one booster dose of the nonadjuvanted rS1Beta (recombinant S1 protein of SARS-CoV-2 Beta [B.1.351]) subunit vaccine was effective at stimulating strong long-lived S1-specific immune responses and inducing significantly high neutralizing antibodies against Wuhan, Beta, and Delta strains, with 3.6- to 19.5-fold increases. Importantly, the booster dose also elicited cross-reactive antibodies, resulting in angiotensin-converting enzyme 2 (ACE2) binding inhibition against spikes of SARS-CoV-2, including Omicron variants, persisting for >28 weeks after booster vaccination. Interestingly, the levels of neutralizing antibodies were correlated not only with the level of S1 binding IgG but also with ACE2 inhibition. Our findings suggest that the rS1Beta subunit vaccine candidate as a booster has the potential to offer cross-neutralization against broad variants and has important implications for the vaccine control of newly emerging breakthrough SARS-CoV-2 variants in elderly individuals primed with adenovirus-based vaccines like AZD1222 and Ad26.COV2.S. IMPORTANCE Vaccines have significantly reduced the incidences of severe coronavirus disease 2019 (COVID-19) cases and deaths. However, the emergence of SARS-CoV-2 variants has raised concerns about their increased transmissibility and ability to evade neutralizing antibodies, especially among elderly individuals who are at higher risks of mortality and reductions of vaccine effectiveness. To address this, a heterologous booster vaccination strategy has been considered as a solution to protect the elderly population against breakthrough infections caused by emerging variants. This study evaluated the booster effect of an S1 subunit vaccine in aged mice that had been previously primed with adenoviral vaccines, providing valuable preclinical evidence for elderly people vaccinated with the currently approved COVID-19 vaccines. This study confirms the potential for using the S1 subunit vaccine as a booster to enhance cross-neutralizing antibodies against emerging variants of concern.
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Affiliation(s)
- Eun Kim
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Muhammad S Khan
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Infectious Diseases and Microbiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA
| | - Alessandro Ferrari
- Molecular Virology Unit, Microbiology and Virology Department, IRCCS Policlinico San Matteo, Pavia, Italy
| | - Shaohua Huang
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Josè C Sammartino
- Molecular Virology Unit, Microbiology and Virology Department, IRCCS Policlinico San Matteo, Pavia, Italy
| | - Elena Percivalle
- Molecular Virology Unit, Microbiology and Virology Department, IRCCS Policlinico San Matteo, Pavia, Italy
| | - Thomas W Kenniston
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Irene Cassaniti
- Molecular Virology Unit, Microbiology and Virology Department, IRCCS Policlinico San Matteo, Pavia, Italy
| | - Fausto Baldanti
- Molecular Virology Unit, Microbiology and Virology Department, IRCCS Policlinico San Matteo, Pavia, Italy
- Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Andrea Gambotto
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Infectious Diseases and Microbiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA
- UPMC Hillman Cancer Center, Pittsburgh, Pennsylvania, USA
- Department of Medicine, Division of Infectious Disease, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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3
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Development of SARS-CoV-2 neutralizing antibody detection assay by using recombinant plant-produced proteins. BIOTECHNOLOGY REPORTS 2023; 38:e00796. [PMID: 37056791 PMCID: PMC10077816 DOI: 10.1016/j.btre.2023.e00796] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/26/2023] [Accepted: 03/30/2023] [Indexed: 04/08/2023]
Abstract
Detecting immunity against SARS-CoV-2 is vital for evaluating vaccine response and natural infection, but conventional virus neutralization test (cVNT) requires BSL3 and live viruses, and pseudo-virus neutralization test (pVNT) needs specialized equipment and trained professionals in BSL2. The surrogate virus neutralization test (sVNT) was developed to overcome these limitations. This study explored the use of angiotensin converting enzyme (ACE2) produced from Nicotiana benthamiana for the development of an affordable neutralizing antibodies detection assay. The results showed that the plant-produced ACE2-His can bind to the receptor binding domain (RBD) of the SARS-CoV-2, and was used to develop sVNT with plant-produced RBD protein. The sVNT developed using plant-produced proteins showed high sensitivity and specificity when validated with a group of 30 RBD-Fc vaccinated mice sera and the results were correlated with cVNT titer. This preliminary finding suggests that the plants could offer a cost-effective platform for producing diagnostic reagents.
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Khan MS, Kim E, Huang S, Kenniston TW, Gambotto A. Trivalent SARS-CoV-2 S1 Subunit Protein Vaccination Induces Broad Humoral Responses in BALB/c Mice. Vaccines (Basel) 2023; 11:314. [PMID: 36851191 PMCID: PMC9967783 DOI: 10.3390/vaccines11020314] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/18/2023] [Accepted: 01/28/2023] [Indexed: 02/04/2023] Open
Abstract
This paper presents a novel approach for improving the efficacy of COVID-19 vaccines against emergent SARS-CoV-2 variants. We have evaluated the immunogenicity of unadjuvanted wild-type (WU S1-RS09cg) and variant-specific (Delta S1-RS09cg and OM S1-RS09cg) S1 subunit protein vaccines delivered either as a monovalent or a trivalent antigen in BALB/c mice. Our results show that a trivalent approach induced a broader humoral response with more coverage against antigenically distinct variants, especially when compared to monovalent Omicron-specific S1. This trivalent approach was also found to have increased or equivalent ACE2 binding inhibition, and increased S1 IgG endpoint titer at early timepoints, against SARS-CoV-2 spike variants when compared monovalent Wuhan, Delta, or Omicron S1. Our results demonstrate the utility of protein subunit vaccines against COVID-19 and provide insights into the impact of variant-specific COVID-19 vaccine approaches on the immune response in the current SARS-CoV-2 variant landscape. Particularly, our study provides insight into effects of further increasing valency of currently approved SARS-CoV-2 vaccines, a promising approach for improving protection to curtail emerging viral variants.
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Affiliation(s)
- Muhammad S. Khan
- Department of Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Infectious Diseases and Microbiology, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Eun Kim
- Department of Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Shaohua Huang
- Department of Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Thomas W. Kenniston
- Department of Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Andrea Gambotto
- Department of Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Infectious Diseases and Microbiology, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
- UPMC Hillman Cancer Center, Pittsburgh, PA 15232, USA
- Department of Medicine, Division of Infectious Disease, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
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5
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Lee J, Lee DG, Jung J, Ryu JH, Shin S, Cho SY, Lee R, Oh EJ. Comprehensive assessment of SARS-CoV-2 antibodies against various antigenic epitopes after naive COVID-19 infection and vaccination (BNT162b2 or ChAdOx1 nCoV-19). Front Immunol 2022; 13:1038712. [PMID: 36578491 PMCID: PMC9791030 DOI: 10.3389/fimmu.2022.1038712] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022] Open
Abstract
Comprehensive assessment of SARS-CoV-2 antibodies against antigenic epitopes and cross-neutralization on variants is essential to monitor after infection or vaccination. From 32 COVID-19 patients and 40 vaccinated individuals [20 Oxford-AstraZeneca (AZ) and 20 Pfizer-BioNTech (BNT)], 348 serial sera are collected until 40 days after infection and 3 months after homologous booster vaccination. Antibody levels were monitored using a multiplex-bead assay including variant spike antigens, Roche (S1/RBD total) and a surrogate virus neutralization test (GenScript). Anti-S/S1/RBD levels were higher than anti-S2/N levels from 2 weeks after infection and were higher in severe infection (P < 0.05). Vaccination showed highest antibody levels after 1-month booster and had consistently high levels in the order of anti-full S, anti-RBD, anti-S1 and anti-S2. Infection induced higher anti-S2/N levels than prime vaccination (P < 0.05). Three months after BNT/BNT vaccination, antibody levels against S1/RBD and 23 variant antigens were higher than post-infection or AZ groups (P < 0.05). Regarding intraindividual changes from post-prime to post-boost vaccination, boost induced a 1.1- to 3.9-fold increase on multiplex-bead assay, 22.8- to 24.2-fold on Roche assay and 22.8- to 24.2-fold on GenScript assay. Post-prime levels by multiplex-bead assay predicted post-boost levels, but Roche and GenScript results were not predictive in the AZ group. The kinetics of SARS-CoV-2 antibody levels vary depending on the antigenic epitopes, assay kit, disease severity or vaccine type. Assessing seroconversion using multiplex-bead assays may contribute to monitoring the disease course, adjusting vaccination strategies, and accelerating vaccination efficacy.
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Affiliation(s)
- Jihyun Lee
- Department of Biomedicine and Health Sciences, Graduate School, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong-Gun Lee
- Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea,Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jin Jung
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea,Resesarch and Development Institute for In Vitro Diagnostic Medical Devices of Catholic University of Korea, Seoul, Republic of Korea
| | - Ji Hyeong Ryu
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Soyoung Shin
- Resesarch and Development Institute for In Vitro Diagnostic Medical Devices of Catholic University of Korea, Seoul, Republic of Korea,Department of Laboratory Medicine, Daejeon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sung-Yeon Cho
- Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea,Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Raeseok Lee
- Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea,Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Eun-Jee Oh
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea,Resesarch and Development Institute for In Vitro Diagnostic Medical Devices of Catholic University of Korea, Seoul, Republic of Korea,*Correspondence: Eun-Jee Oh,
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6
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Zhou S, Kaul R, Lynch KL, Wu AH, Walker RP. Transient expression of antinuclear RNP-A antibodies in patients with acute COVID-19 infection. J Transl Autoimmun 2022; 5:100175. [PMCID: PMC9686057 DOI: 10.1016/j.jtauto.2022.100175] [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: 09/16/2022] [Accepted: 11/23/2022] [Indexed: 11/27/2022] Open
Abstract
Introduction Viral infections have been implicated in the initiation of the autoimmune diseases. Recent reports suggest that a proportion of patients with COVID-19 develop severe disease with multiple organ injuries. We evaluated the relationship between COVID-19 severity, prevalence and persistence of antinuclear and other systemic and organ specific autoantibodies as well as SARS-CoV2 infection specific anti-nucleocapsid (N) IgG antibodies and protective neutralizing antibody (Nab) levels. Methods Samples from 119 COVID-19 patients categorized based on their level of care and 284 healthy subjects were tested for the presence and persistence of antinuclear and other systemic and organ specific autoantibodies as well as SARS-CoV2 and neutralizing antibody levels. Results The data shows significantly increased levels of anti RNP-A, anti-nucleocapsid and neutralizing antibody among patients receiving ICU care compared to non-ICU care. Furthermore, subjects receiving ICU care demonstrated significantly higher nucleocapsid IgG levels among the RNP-A positive cohort compared to RNP-A negative cohort. Notably, the expression of anti RNP-A antibodies is transient that reverts to non-reactive status between 20 and 60 days post symptom onset. Conclusions COVID-19 patients in ICU care exhibit significantly higher levels of transient RNP-A autoantibodies, anti-nucleocapsid, and SARS-CoV2 neutralizing antibodies compared to patients in non-ICU care.
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Key Words
- sars-cov-2
- covid-19
- antinuclear antibody
- rnp-a
- neutralizing antibody
- nucleocapsid protein
- sars-cov-2, severe acute respiratory syndrome coronavirus 2
- covid-19, coronavirus disease 2019
- ace2, angiotensin-converting enzyme 2
- ana, antinuclear antibody
- svnt, surrogate viral neutralization test
- nab, neutralizing antibody
- rnp-a, ribonucleoprotein a
- mctd, mixed connective tissue disease
- icu, intensive care unit
- pso, post symptom onset
- n, sars-cov-2 nucleocapsid protein
- ifa, immunofluorescence assay
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Affiliation(s)
- Shuxia Zhou
- Bio-Rad Laboratories, Hercules, CA, USA,Corresponding author. 5500 East Second Street, Benicia, CA, 94510, USA
| | - Ravi Kaul
- Bio-Rad Laboratories, Hercules, CA, USA
| | - Kara L. Lynch
- Department of Laboratory Medicine, University of California, San Francisco, USA
| | - Alan H.B. Wu
- Department of Laboratory Medicine, University of California, San Francisco, USA
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7
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Bonifacio MA, Laterza R, Vinella A, Schirinzi A, Defilippis M, Di Serio F, Ostuni A, Fasanella A, Mariggiò MA. Correlation between In Vitro Neutralization Assay and Serological Tests for Protective Antibodies Detection. Int J Mol Sci 2022; 23:ijms23179566. [PMID: 36076960 PMCID: PMC9455156 DOI: 10.3390/ijms23179566] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/20/2022] [Accepted: 08/21/2022] [Indexed: 11/21/2022] Open
Abstract
Serological assays are useful in investigating the development of humoral immunity against SARS-CoV-2 in the context of epidemiological studies focusing on the spread of protective immunity. The plaque reduction neutralization test (PRNT) is the gold standard method to assess the titer of protective antibodies in serum samples. However, to provide a result, the PRNT requires several days, skilled operators, and biosafety level 3 laboratories. Therefore, alternative methods are being assessed to establish a relationship between their outcomes and PRNT results. In this work, four different immunoassays (Roche Elecsys® Anti SARS-CoV-2 S, Snibe MAGLUMI® SARS-CoV-2 S-RBD IgG, Snibe MAGLUMI® 2019-nCoV IgG, and EUROIMMUN® SARS-CoV-2 NeutraLISA assays, respectively) have been performed on individuals healed after SARS-CoV-2 infection. The correlation between each assay and the reference method has been explored through linear regression modeling, as well as through the calculation of Pearson’s and Spearman’s coefficients. Furthermore, the ability of serological tests to discriminate samples with high titers of neutralizing antibodies (>160) has been assessed by ROC curve analyses, Cohen’s Kappa coefficient, and positive predictive agreement. The EUROIMMUN® NeutraLISA assay displayed the best correlation with PRNT results (Pearson and Spearman coefficients equal to 0.660 and 0.784, respectively), as well as the ROC curve with the highest accuracy, sensitivity, and specificity (0.857, 0.889, and 0.829, respectively).
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Affiliation(s)
- Maria Addolorata Bonifacio
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro Medical School, 70124 Bari, Italy
| | - Riccardo Laterza
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro Medical School, 70124 Bari, Italy
| | - Angela Vinella
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro Medical School, 70124 Bari, Italy
| | - Annalisa Schirinzi
- Clinical Pathology Unit, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Mariangela Defilippis
- Immunohematology and Transfusion Medicine Service, Azienda Ospedaliero-Universitaria Consorziale Policlinico di Bari, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Francesca Di Serio
- Clinical Pathology Unit, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Angelo Ostuni
- Immunohematology and Transfusion Medicine Service, Azienda Ospedaliero-Universitaria Consorziale Policlinico di Bari, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Antonio Fasanella
- Istituto Istituto Zooprofilattico Sperimentale della Puglia e della Basilicata, 71121 Foggia, Italy
| | - Maria Addolorata Mariggiò
- Department of Biomedical Sciences and Human Oncology, University of Bari Aldo Moro Medical School, 70124 Bari, Italy
- Correspondence:
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8
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Wu AHB, Lynch KL. Increased Serum IgG Antibody, Avidity, and Surrogate Virus Neutralization Response after a Third Dose for the BNT162b2 mRNA Vaccine to SARS-CoV-2. J Appl Lab Med 2022; 7:995-997. [PMID: 35661895 PMCID: PMC9384200 DOI: 10.1093/jalm/jfac018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Alan H B Wu
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
| | - Kara L Lynch
- Department of Laboratory Medicine, University of California, San Francisco, CA, USA
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9
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Watanabe Y, Matsuba I, Watanabe K, Kunishima T, Takechi Y, Takuma T, Araki Y, Hirotsu N, Sakai H, Oikawa R, Danno H, Fukuda M, Futagami S, Wada K, Yamamoto H, Itoh F, Oda I, Hatori Y, Degawa H. Heterogeneity assessment of vaccine-induced effects using point-of-care surrogate neutralization test for severe acute respiratory syndrome coronavirus 2. J Clin Lab Anal 2022; 36:e24545. [PMID: 35678628 PMCID: PMC9279978 DOI: 10.1002/jcla.24545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/27/2022] [Accepted: 05/24/2022] [Indexed: 11/07/2022] Open
Abstract
Introduction Coronavirus disease (COVID‐19) caused by severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) has become a global pandemic even after vaccination. We aimed to identify immunological heterogeneity over time in vaccinated healthcare workers using neutralization antibodies and neutralizing activity tests. Methods Serum samples were collected from 214 healthcare workers before vaccination (pre) and on days 22, 90, and 180 after receiving the first dose of BNT162b2 vaccine (day 0). Neutralization antibody (NAb, SARS‐CoV‐2 S‐RBD IgM/IgG) titers and two kinds of surrogate virus neutralization tests (sVNTs) were analyzed (UMIN000043851). Results The NAb (SARS‐CoV‐2 S‐RBD IgG) titer peaked on day 90 after vaccination (30,808.0 μg/ml ± 35,211; p < 0.0001) and declined on day 180 (11,678.0 μg/ml ± 33,770.0; p < 0.0001). The neutralizing activity also peaked on day 90 and declined with larger individual differences than those of IgG titer on day 180 (88.9% ± 15.0%, 64.8% ± 23.7%, p < 0.0001). We also found that the results of POCT‐sVNT (immunochromatography) were highly correlated with those of conventional sVNT (ELISA). Conclusions Neutralizing activity is the gold standard for vaccine efficacy evaluation. Our results using conventional sVNT showed large individual differences in neutralizing activity reduction on day 180 (64.8% ± 23.7%), suggesting an association with the difference in vaccine efficacy. POCT‐sVNT is rapid and user‐friendly; it might be used for triage in homes, isolation facilities, and event venues without restrictions on the medical testing environment.
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Affiliation(s)
- Yoshiyuki Watanabe
- Kawasaki Physicians AssociationKawasakiJapan
- Department of Internal MedicineKawasaki Rinko General HospitalKawasakiJapan
- Department of Internal Medicine, Division of GastroenterologySt. Marianna University School of MedicineKawasakiJapan
- Department of Internal Medicine, Division of GastroenterologyNippon Medical SchoolTokyoJapan
- Department of OtorhinolaryngologyToho University Omori Medical CenterJapan
| | | | - Karin Watanabe
- Department of Internal MedicineKawasaki Rinko General HospitalKawasakiJapan
| | | | | | | | | | | | | | - Ritsuko Oikawa
- Department of Internal Medicine, Division of GastroenterologySt. Marianna University School of MedicineKawasakiJapan
| | | | | | - Seiji Futagami
- Department of Internal Medicine, Division of GastroenterologyNippon Medical SchoolTokyoJapan
| | - Kota Wada
- Department of OtorhinolaryngologyToho University Omori Medical CenterJapan
| | - Hiroyuki Yamamoto
- Department of BioinformaticsSt. Marianna University Graduate School of MedicineKanagawaJapan
| | - Fumio Itoh
- Department of Internal Medicine, Division of GastroenterologySt. Marianna University School of MedicineKawasakiJapan
| | - Ichiro Oda
- Department of Internal MedicineKawasaki Rinko General HospitalKawasakiJapan
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