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Tani N, Ikematsu H, Watanabe H, Goto T, Yanagihara Y, Kurata Y, Harada Y, Horiuchi T, Akashi K, Shimono N, Chong Y. Reduction of adverse reactions and correlation between post-vaccination fever and specific antibody response across successive SARS-CoV-2 mRNA vaccinations. Vaccine X 2024; 18:100489. [PMID: 38699157 PMCID: PMC11063515 DOI: 10.1016/j.jvacx.2024.100489] [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: 02/28/2024] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 05/05/2024] Open
Abstract
Background SARS-CoV-2 mRNA vaccination, recognized for high immunogenicity, frequently induces adverse reactions, especially fever. We previously reported a correlation between post-vaccination fever and specific antibody responses to the primary series and first booster. We herein report changes in adverse reactions and the correlation between post-vaccination fever and antibody responses across successive vaccinations, from monovalent to bivalent mRNA vaccines. Methods This cohort study was conducted at a Japanese hospital to investigate adverse reactions to the monovalent primary, first booster, and BA.4/5 bivalent BNT162b2 vaccinations. Local and systemic reactions were reported through a self-reporting diary after each dose. The spike-specific IgG titers were measured following each vaccination. Results Across 727 vaccinations in the vaccine series, the bivalent booster induced fewer adverse reactions than earlier doses. Fever ≥ 38.0 °C was significantly less frequent in the bivalent booster (12.3 %) compared to the primary series and monovalent booster (22.0 %, 26.2 %, p < 0.001). Reaction severity was also reduced in the bivalent booster. In the analysis of 70 participants with complete data for all doses, post-vaccination fever ≥ 38.0 °C exhibited the highest relative risk (RR) among all solicited reactions throughout the vaccine series (RR: 5.24 [95 % CI: 2.40-11.42] for monovalent and 6.24 [95 % CI: 2.14-18.15] for bivalent). The frequency of fever ≥ 38.0 °C after all doses was 8.6 % (6/70), with no fever ≥ 39.0 °C across all vaccinations. A high-grade post-vaccination fever was correlated with higher IgG titers, with multivariate analyses confirming this correlation as independent for each dose and unaffected by previous post-vaccination fever. Conclusions The bivalent mRNA vaccine booster showed fewer and milder adverse reactions than the monovalent doses. Although vaccinees with a history of post-vaccination fever were more likely to experience fever after a subsequent dose, such recurrences were infrequent. A correlation between post-vaccination fever and increased IgG titers was identified for each vaccination, irrespective of post-vaccination fever history.
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Affiliation(s)
- Naoki Tani
- Department of Infectious Diseases, Fukuoka City Hospital, Fukuoka, Japan
| | | | - Haruka Watanabe
- Department of Clinical Immunology, Rheumatology, and Infectious Disease, Kyushu University Hospital, Fukuoka, Japan
| | - Takeyuki Goto
- Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | | | | | - Yukiko Harada
- Department of Infectious Diseases, Fukuoka City Hospital, Fukuoka, Japan
| | | | - Koichi Akashi
- Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Nobuyuki Shimono
- Center for the Study of Global Infection, Kyushu University Hospital, Fukuoka, Japan
| | - Yong Chong
- Department of Clinical Immunology, Rheumatology, and Infectious Disease, Kyushu University Hospital, Fukuoka, Japan
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Guo H, Ha S, Botten JW, Xu K, Zhang N, An Z, Strohl WR, Shiver JW, Fu TM. SARS-CoV-2 Omicron: Viral Evolution, Immune Evasion, and Alternative Durable Therapeutic Strategies. Viruses 2024; 16:697. [PMID: 38793580 PMCID: PMC11125895 DOI: 10.3390/v16050697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 04/22/2024] [Accepted: 04/24/2024] [Indexed: 05/26/2024] Open
Abstract
Since the SARS-CoV-2 Omicron virus has gained dominance worldwide, its continual evolution with unpredictable mutations and patterns has revoked all authorized immunotherapeutics. Rapid viral evolution has also necessitated several rounds of vaccine updates in order to provide adequate immune protection. It remains imperative to understand how Omicron evolves into different subvariants and causes immune escape as this could help reevaluate the current intervention strategies mostly implemented in the clinics as emergency measures to counter the pandemic and, importantly, develop new solutions. Here, we provide a review focusing on the major events of Omicron viral evolution, including the features of spike mutation that lead to immune evasion against monoclonal antibody (mAb) therapy and vaccination, and suggest alternative durable options such as the ACE2-based experimental therapies superior to mAbs to address this unprecedented evolution of Omicron virus. In addition, this type of unique ACE2-based virus-trapping molecules can counter all zoonotic SARS coronaviruses, either from unknown animal hosts or from established wild-life reservoirs of SARS-CoV-2, and even seasonal alpha coronavirus NL63 that depends on human ACE2 for infection.
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Affiliation(s)
- Hailong Guo
- IGM Biosciences, Mountain View, CA 94043, USA
| | - Sha Ha
- IGM Biosciences, Mountain View, CA 94043, USA
| | - Jason W. Botten
- Department of Medicine, Division of Pulmonary Disease and Critical Care Medicine, Robert Larner, M.D. College of Medicine, University of Vermont, Burlington, VT 05405, USA
- Department of Microbiology and Molecular Genetics, Robert Larner, M.D. College of Medicine, University of Vermont, Burlington, VT 05405, USA
| | - Kai Xu
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Ningyan Zhang
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Zhiqiang An
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
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3
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Thümmler L, Beckmann N, Sehl C, Soddemann M, Braß P, Bormann M, Brochhagen L, Elsner C, Hoertel N, Cougoule C, Ciesek S, Widera M, Dittmer U, Lindemann M, Horn PA, Witzke O, Kadow S, Kamler M, Gulbins E, Becker KA, Krawczyk A. Fluoxetine and Sertraline Potently Neutralize the Replication of Distinct SARS-CoV-2 Variants. Viruses 2024; 16:545. [PMID: 38675888 PMCID: PMC11053511 DOI: 10.3390/v16040545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/28/2024] Open
Abstract
The pandemic caused by SARS-CoV-2 is still a major health problem. Newly emerging variants and long-COVID-19 represent a challenge for the global health system. In particular, individuals in developing countries with insufficient health care need easily accessible, affordable and effective treatments of COVID-19. Previous studies have demonstrated the efficacy of functional inhibitors of acid sphingomyelinase against infections with various viruses, including early variants of SARS-CoV-2. This work investigated whether the acid sphingomyelinase inhibitors fluoxetine and sertraline, usually used as antidepressant molecules in clinical practice, can inhibit the replication of the former and recently emerged SARS-CoV-2 variants in vitro. Fluoxetine and sertraline potently inhibited the infection with pseudotyped virus-like particles and SARS-CoV-2 variants D614G, alpha, delta, omicron BA.1 and omicron BA.5. These results highlight fluoxetine and sertraline as priority candidates for large-scale phase 3 clinical trials at different stages of SARS-CoV-2 infections, either alone or in combination with other medications.
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Affiliation(s)
- Laura Thümmler
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Medicine Essen, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (L.T.); (P.B.); (M.B.); (L.B.); (O.W.)
- Institute for Transfusion Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (M.L.); (P.A.H.)
| | - Nadine Beckmann
- Institute of Molecular Biology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany (C.S.); (M.S.); (S.K.); (E.G.); (K.A.B.)
| | - Carolin Sehl
- Institute of Molecular Biology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany (C.S.); (M.S.); (S.K.); (E.G.); (K.A.B.)
| | - Matthias Soddemann
- Institute of Molecular Biology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany (C.S.); (M.S.); (S.K.); (E.G.); (K.A.B.)
| | - Peer Braß
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Medicine Essen, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (L.T.); (P.B.); (M.B.); (L.B.); (O.W.)
| | - Maren Bormann
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Medicine Essen, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (L.T.); (P.B.); (M.B.); (L.B.); (O.W.)
| | - Leonie Brochhagen
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Medicine Essen, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (L.T.); (P.B.); (M.B.); (L.B.); (O.W.)
| | - Carina Elsner
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (C.E.); (U.D.)
| | - Nicolas Hoertel
- Institute Psychiatry and Neuroscience de Paris, INSERM U1266, Paris Cité University, 75014 Paris, France;
- Psychiatry and Addiction Department Corentin-Celton Hospital (AP-HP), 92130 Paris, France
| | - Céline Cougoule
- Institute of Pharmacology and Structural Biology (IPBS), CNRS, University of Toulouse, UPS, 31000 Toulouse, France;
| | - Sandra Ciesek
- Institute of Medical Virology, University Hospital Frankfurt, 60590 Frankfurt am Main, Germany; (S.C.); (M.W.)
- Institute of Pharmaceutical Biology, Goethe-University, 60323 Frankfurt am Main, Germany
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Branch Translational Medicine and Pharmacology, 60311 Frankfurt am Main, Germany
| | - Marek Widera
- Institute of Medical Virology, University Hospital Frankfurt, 60590 Frankfurt am Main, Germany; (S.C.); (M.W.)
| | - Ulf Dittmer
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (C.E.); (U.D.)
| | - Monika Lindemann
- Institute for Transfusion Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (M.L.); (P.A.H.)
| | - Peter A. Horn
- Institute for Transfusion Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (M.L.); (P.A.H.)
| | - Oliver Witzke
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Medicine Essen, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (L.T.); (P.B.); (M.B.); (L.B.); (O.W.)
| | - Stephanie Kadow
- Institute of Molecular Biology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany (C.S.); (M.S.); (S.K.); (E.G.); (K.A.B.)
| | - Markus Kamler
- Department of Thoracic and Cardiovascular Surgery, West German Heart Center, University Hospital Essen, 45147 Essen, Germany;
| | - Erich Gulbins
- Institute of Molecular Biology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany (C.S.); (M.S.); (S.K.); (E.G.); (K.A.B.)
| | - Katrin Anne Becker
- Institute of Molecular Biology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany (C.S.); (M.S.); (S.K.); (E.G.); (K.A.B.)
| | - Adalbert Krawczyk
- Department of Infectious Diseases, West German Centre of Infectious Diseases, University Medicine Essen, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (L.T.); (P.B.); (M.B.); (L.B.); (O.W.)
- Institute for Virology, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (C.E.); (U.D.)
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Gan M, Cao J, Zhang Y, Fu H, Lin X, Ouyang Q, Xu X, Yuan Y, Fan X. Landscape of T cell epitopes displays hot mutations of SARS-CoV-2 variant spikes evading cellular immunity. J Med Virol 2024; 96:e29452. [PMID: 38314852 DOI: 10.1002/jmv.29452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 01/17/2024] [Accepted: 01/23/2024] [Indexed: 02/07/2024]
Abstract
The continuous evolution of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been accompanied by the emergence of viral mutations that pose a great challenge to existing vaccine strategies. It is not fully understood with regard to the role of mutations on the SARS-CoV-2 spike protein from emerging viral variants in T cell immunity. In the current study, recombinant eukaryotic plasmids were constructed as DNA vaccines to express the spike protein from multiple SARS-CoV-2 strains. These DNA vaccines were used to immunize BALB/c mice, and cross-T cell responses to the spike protein from these viral strains were quantitated using interferon-γ (IFN-γ) Elispot. Peptides covering the full-length spike protein from different viral strains were used to detect epitope-specific IFN-γ+ CD4+ and CD8+ T cell responses by fluorescence-activated cell sorting. SARS-CoV-2 Delta and Omicron BA.1 strains were found to have broad T cell cross-reactivity, followed by the Beta strain. The landscapes of T cell epitopes on the spike protein demonstrated that at least 30 mutations emerging from Alpha to Omicron BA.5 can mediate the escape of T cell immunity. Omicron and its sublineages have 19 out of these 30 mutations, most of which are new, and a few are inherited from ancient circulating variants of concerns. The cross-T cell immunity between SARS-CoV-2 prototype strain and Omicron strains can be attributed to the T cell epitopes located in the N-terminal domain (181-246 aa [amino acids], 271-318 aa) and C-terminal domain (1171-1273 aa) of the spike protein. These findings provide in vivo evidence for optimizing vaccine manufacturing and immunization strategies for current or future viral variants.
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Affiliation(s)
- Mengze Gan
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Jinge Cao
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Yandi Zhang
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Fu
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaosong Lin
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Qi Ouyang
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Xinyue Xu
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
| | - Yin Yuan
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xionglin Fan
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, Wuhan, China
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5
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Li L, Xie Z, Li Y, Luo M, Zhang L, Feng C, Tang G, Huang H, Hou R, Xu Y, Jia S, Shi J, Fan Q, Gan Q, Yu N, Hu F, Li Y, Lan Y, Tang X, Li F, Deng X. Immune response and severity of Omicron BA.5 reinfection among individuals previously infected with different SARS-CoV-2 variants. Front Cell Infect Microbiol 2023; 13:1277880. [PMID: 38188634 PMCID: PMC10766752 DOI: 10.3389/fcimb.2023.1277880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/28/2023] [Indexed: 01/09/2024] Open
Abstract
Introduction COVID-19 continues to spread worldwide, with an increasing number of individuals experiencing reinfection after recovering from their primary infection. However, the nature and progression of this infection remain poorly understood. We aimed to investigate the immune response, severity and outcomes of Omicron BA.5 reinfection among individuals previously infected with different SARS-CoV-2 variants. Methods We enrolled 432 COVID-19 cases who had experienced prior infection with the ancestral SARS-CoV-2 virus, Delta variant or Omicron BA.2 variant between January 2020 and May 2022 in Guangzhou, China. All cases underwent follow-up from March to April, 2023 through telephone questionnaires and clinical visits. Nasal lavage fluid and peripheral blood were collected to assess anti-RBD IgA, anti-RBD IgG and virus-specific IFN-γ secreting T cells. Results Our study shows that 73.1%, 56.7% and 12.5% of individuals with a prior infection of the ancestral virus, Delta or Omicron BA.2 variant experienced reinfection with the BA.5 variant, respectively. Fever, cough and sore throat were the most common symptoms of BA.5 reinfection, with most improving within one week and none progressing to a critical condition. Compared with individuals without reinfection, reinfected patients with a prior Delta infection exhibited elevated levels of nasal anti-RBD IgA, serum anti-RBD IgG and IFN-γ secreting T cells, whereas there was no noticeable change in reinfected individuals with a prior BA.2 infection. Conclusion These results suggest that BA.5 reinfection is common but severe outcomes are relatively rare. Reinfection with a novel SARS-CoV-2 variant different from the prior infection may induce a more robust immune protection, which should be taken into account during vaccine development.
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Affiliation(s)
- Lu Li
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Zhiwei Xie
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Youxia Li
- Department of Critical Care Medicine, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Minhan Luo
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Lieguang Zhang
- Department of Radiology, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Chengqian Feng
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Guofang Tang
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Huang Huang
- Department of Critical Care Medicine, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Ruitian Hou
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yujuan Xu
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Shijie Jia
- Department of Traditional Chinese Medicine, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jingrong Shi
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Qinghong Fan
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Qingxin Gan
- Department of Radiology, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Na Yu
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Fengyu Hu
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Laboratory, Bio-Island, Guangzhou, China
| | - Yueping Li
- Department of Infectious Critical Care Medicine, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yun Lan
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
| | - Xiaoping Tang
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Laboratory, Bio-Island, Guangzhou, China
| | - Feng Li
- Institute of Infectious Diseases, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
- Guangzhou Laboratory, Bio-Island, Guangzhou, China
| | - Xilong Deng
- Department of Critical Care Medicine, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, China
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6
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Ko GY, Lee J, Bae H, Ryu JH, Park HS, Kang H, Jung J, Choi AR, Lee R, Lee DG, Oh EJ. Longitudinal Analysis of SARS-CoV-2-Specific Cellular and Humoral Immune Responses and Breakthrough Infection following BNT162b2/BNT162b2/BNT162b2 and ChAdOx1/ChAdOx1/BNT162b2 Vaccination: A Prospective Cohort in Naive Healthcare Workers. Vaccines (Basel) 2023; 11:1613. [PMID: 37897015 PMCID: PMC10610978 DOI: 10.3390/vaccines11101613] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/02/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Assessing immune responses post-SARS-CoV-2 vaccination is crucial for optimizing vaccine strategies. This prospective study aims to evaluate immune responses and breakthrough infection in 235 infection-naïve healthcare workers up to 13-15 months after initial vaccination in two vaccine groups (108 BNT/BNT/BNT and 127 ChAd/ChAd/BNT). Immune responses were assessed using the interferon-gamma enzyme-linked immunospot (ELISPOT) assay, total immunoglobulin, and neutralizing activity through surrogate virus neutralization test at nine different time points. Both groups exhibited peak responses one to two months after the second or third dose, followed by gradual declines over six months. Notably, the ChAd group exhibited a gradual increase in ELISPOT results, but their antibody levels declined more rapidly after reaching peak response compared to the BNT group. Six months after the third dose, both groups had substantial cellular responses, with superior humoral responses in the BNT group (p < 0.05). As many as 55 breakthrough infection participants displayed higher neutralization activities against Omicron variants, but similar cellular responses compared to 127 infection-naïve individuals, suggesting cross-immunity. Distinct neutralization classifications (<30%, >80% inhibition) correlated with different ELISPOT results. Our study reveals diverse immune response patterns based on vaccine strategies and breakthrough infections, emphasizing the importance of understanding these dynamics for optimized vaccination decisions.
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Affiliation(s)
- Geon Young Ko
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea; (G.Y.K.); (J.L.); (H.B.)
| | - Jihyun Lee
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea; (G.Y.K.); (J.L.); (H.B.)
| | - Hyunjoo Bae
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Republic of Korea; (G.Y.K.); (J.L.); (H.B.)
| | - Ji Hyeong Ryu
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.H.R.); (H.-S.P.); (H.K.); (J.J.); (A.-R.C.)
| | - Hye-Sun Park
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.H.R.); (H.-S.P.); (H.K.); (J.J.); (A.-R.C.)
| | - Hyunhye Kang
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.H.R.); (H.-S.P.); (H.K.); (J.J.); (A.-R.C.)
- Resesarch and Development Institute for In Vitro Diagnostic Medical Devices, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jin Jung
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.H.R.); (H.-S.P.); (H.K.); (J.J.); (A.-R.C.)
- Resesarch and Development Institute for In Vitro Diagnostic Medical Devices, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Ae-Ran Choi
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.H.R.); (H.-S.P.); (H.K.); (J.J.); (A.-R.C.)
| | - Raeseok Lee
- Division of Infectious Diseases, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (R.L.); (D.-G.L.)
- Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul 06591, 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 06591, Republic of Korea; (R.L.); (D.-G.L.)
- Vaccine Bio Research Institute, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Eun-Jee Oh
- Department of Laboratory Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; (J.H.R.); (H.-S.P.); (H.K.); (J.J.); (A.-R.C.)
- Resesarch and Development Institute for In Vitro Diagnostic Medical Devices, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
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