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Pflumm D, Seidel A, Klein F, Groß R, Krutzke L, Kochanek S, Kroschel J, Münch J, Stifter K, Schirmbeck R. Heterologous DNA-prime/protein-boost immunization with a monomeric SARS-CoV-2 spike antigen redundantizes the trimeric receptor-binding domain structure to induce neutralizing antibodies in old mice. Front Immunol 2023; 14:1231274. [PMID: 37753087 PMCID: PMC10518615 DOI: 10.3389/fimmu.2023.1231274] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 08/09/2023] [Indexed: 09/28/2023] Open
Abstract
A multitude of alterations in the old immune system impair its functional integrity. Closely related, older individuals show, for example, a reduced responsiveness to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) vaccines. However, systematic strategies to specifically improve the efficacy of vaccines in the old are missing or limited to simple approaches like increasing the antigen concentration or injection frequencies. We here asked whether the intrinsic, trimeric structure of the SARS-CoV-2 spike (S) antigen and/or a DNA- or protein-based antigen delivery platform affects priming of functional antibody responses particularly in old mice. The used S-antigens were primarily defined by the presence/absence of the membrane-anchoring TM domain and the closely interlinked formation/non-formation of a trimeric structure of the receptor binding domain (S-RBD). Among others, we generated vectors expressing prefusion-stabilized, cell-associated (TM+) trimeric "S2-P" or secreted (TM-) monomeric "S6-PΔTM" antigens. These proteins were produced from vector-transfected HEK-293T cells under mild conditions by Strep-tag purification, revealing that cell-associated but not secreted S proteins tightly bound Hsp73 and Grp78 chaperones. We showed that both, TM-deficient S6-PΔTM and full-length S2-P antigens elicited very similar S-RBD-specific antibody titers and pseudovirus neutralization activities in young (2-3 months) mice through homologous DNA-prime/DNA-boost or protein-prime/protein-boost vaccination. The trimeric S2-P antigen induced high S-RBD-specific antibody responses in old (23-24 months) mice through DNA-prime/DNA-boost vaccination. Unexpectedly, the monomeric S6-PΔTM antigen induced very low S-RBD-specific antibody titers in old mice through homologous DNA-prime/DNA-boost or protein-prime/protein-boost vaccination. However, old mice efficiently elicited an S-RBD-specific antibody response after heterologous DNA-prime/protein-boost immunization with the S6-PΔTM antigen, and antibody titers even reached similar levels and neutralizing activities as in young mice and also cross-reacted with different S-variants of concern. The old immune system thus distinguished between trimeric and monomeric S protein conformations: it remained antigen responsive to the trimeric S2-P antigen, and a simple change in the vaccine delivery regimen was sufficient to unleash its reactivity to the monomeric S6-PΔTM antigen. This clearly shows that both the antigen structure and the delivery platform are crucial to efficiently prime humoral immune responses in old mice and might be relevant for designing "age-adapted" vaccine strategies.
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Affiliation(s)
- Dominik Pflumm
- Department of Internal Medicine I, University Hospital of Ulm, Ulm, Germany
| | - Alina Seidel
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Fabrice Klein
- Department of Gene Therapy, University Hospital of Ulm, Ulm, Germany
| | - Rüdiger Groß
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Lea Krutzke
- Department of Gene Therapy, University Hospital of Ulm, Ulm, Germany
| | - Stefan Kochanek
- Department of Gene Therapy, University Hospital of Ulm, Ulm, Germany
| | - Joris Kroschel
- Institute of Clinical Chemistry, Ulm University Medical Center, Ulm, Germany
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Katja Stifter
- Department of Internal Medicine I, University Hospital of Ulm, Ulm, Germany
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Hentschel V, Horsch C, Mayer B, Thies A, Qian W, Kroschel J, Seufferlein T, Perkhofer L, Müller M. A Systematic Evaluation of the SARS-CoV-2 Vaccine-Induced Anti-S-RBD-Ig Response in a Population of Health Care Workers. Vaccines (Basel) 2023; 11:1467. [PMID: 37766143 PMCID: PMC10537165 DOI: 10.3390/vaccines11091467] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/02/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
In the wake of the COVID-19 pandemic, the novel class of mRNA vaccines has been granted first-time approval for active immunization against SARS-CoV-2 alongside the already established viral vector-based vaccines. In this prospective single-center study, we set out to determine the vaccine-induced humoral immune response in a population of 1512 health care employees after the second and third vaccination, respectively. Anti-SARS-CoV-2 receptor-binding domain (RBD) and nucleocapsid antigen antibody concentrations were assessed using commercially available immunoassays. We could show that, in particular, young study subjects aged below 30 years, as well as those with a prior SARS-CoV-2 infection, developed significantly higher antibody concentrations. Our data further suggest that being in physically close contact with formerly SARS-CoV-2-positive people positively affects the post-vaccination response. Surprisingly, study subjects with a BMI > 30 produced the highest anti-S-RBD Ig antibody levels if they had recently received their third vaccination. Also, heterologous dual vaccine regimens consisting of a BNT162b2 and ChAdOx1 n-CoV-19, a homologous triple combination of BNT162b2, and an application of mRNA-1273 as the third vaccine, were most efficient at eliciting a humoral immune response. Our study substantiates existing evidence, but beyond that, scrutinizes the impact of vaccine agents and their respective combinations, as well as different time intervals on humoral immunogenicity.
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Affiliation(s)
- Viktoria Hentschel
- Department of Internal Medicine I, Ulm University Hospital, 89081 Ulm, Germany; (V.H.); (A.T.); (W.Q.); (T.S.); (L.P.)
| | - Cornelia Horsch
- Institute for Epidemiology and Medical Biometry, Ulm University, 89075 Ulm, Germany; (C.H.); (B.M.)
| | - Benjamin Mayer
- Institute for Epidemiology and Medical Biometry, Ulm University, 89075 Ulm, Germany; (C.H.); (B.M.)
| | - Annsophie Thies
- Department of Internal Medicine I, Ulm University Hospital, 89081 Ulm, Germany; (V.H.); (A.T.); (W.Q.); (T.S.); (L.P.)
| | - Will Qian
- Department of Internal Medicine I, Ulm University Hospital, 89081 Ulm, Germany; (V.H.); (A.T.); (W.Q.); (T.S.); (L.P.)
| | - Joris Kroschel
- Central Department of Clinical Chemistry, Ulm University Hospital, 89081 Ulm, Germany;
| | - Thomas Seufferlein
- Department of Internal Medicine I, Ulm University Hospital, 89081 Ulm, Germany; (V.H.); (A.T.); (W.Q.); (T.S.); (L.P.)
| | - Lukas Perkhofer
- Department of Internal Medicine I, Ulm University Hospital, 89081 Ulm, Germany; (V.H.); (A.T.); (W.Q.); (T.S.); (L.P.)
- Institute of Molecular Oncology and Stem Cell Biology, Ulm University Hospital, 89081 Ulm, Germany
| | - Martin Müller
- Department of Internal Medicine I, Ulm University Hospital, 89081 Ulm, Germany; (V.H.); (A.T.); (W.Q.); (T.S.); (L.P.)
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Seidel A, Zanoni M, Groß R, Krnavek D, Erdemci-Evin S, von Maltitz P, Albers DPJ, Conzelmann C, Liu S, Weil T, Mayer B, Hoffmann M, Pöhlmann S, Beil A, Kroschel J, Kirchhoff F, Münch J, Müller JA. BNT162b2 booster after heterologous prime-boost vaccination induces potent neutralizing antibodies and T cell reactivity against SARS-CoV-2 Omicron BA.1 in young adults. Front Immunol 2022; 13:882918. [PMID: 35958601 PMCID: PMC9357986 DOI: 10.3389/fimmu.2022.882918] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/28/2022] [Indexed: 01/14/2023] Open
Abstract
In light of the decreasing immune protection against symptomatic SARS-CoV-2 infection after initial vaccinations and the now dominant immune-evasive Omicron variants, 'booster' vaccinations are regularly performed to restore immune responses. Many individuals have received a primary heterologous prime-boost vaccination with long intervals between vaccinations, but the resulting long-term immunity and the effects of a subsequent 'booster', particularly against Omicron BA.1, have not been defined. We followed a cohort of 23 young adults, who received a primary heterologous ChAdOx1 nCoV-19 BNT162b2 prime-boost vaccination, over a 7-month period and analysed how they responded to a BNT162b2 'booster'. We show that already after the primary heterologous vaccination, neutralization titers against Omicron BA.1 are recognizable but that humoral and cellular immunity wanes over the course of half a year. Residual responsive memory T cells recognized spike epitopes of the early SARS-CoV-2 B.1 strain as well as the Delta and BA.1 variants of concern (VOCs). However, the remaining antibody titers hardly neutralized these VOCs. The 'booster' vaccination was well tolerated and elicited both high antibody titers and increased memory T cell responses against SARS-CoV-2 including BA.1. Strikingly, in this young heterologously vaccinated cohort the neutralizing activity after the 'booster' was almost as potent against BA.1 as against the early B.1 strain. Our results suggest that a 'booster' after heterologous vaccination results in effective immune maturation and potent protection against the Omicron BA.1 variant in young adults.
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Affiliation(s)
- Alina Seidel
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Michelle Zanoni
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Rüdiger Groß
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Daniela Krnavek
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | | | - Pascal von Maltitz
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Dan P. J. Albers
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Carina Conzelmann
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Sichen Liu
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Tatjana Weil
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Benjamin Mayer
- Institute for Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
| | - Markus Hoffmann
- Infection Biology Unit, German Primate Center – Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, Georg-August-University Göttingen, Göttingen, Germany
| | - Stefan Pöhlmann
- Infection Biology Unit, German Primate Center – Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, Georg-August-University Göttingen, Göttingen, Germany
| | - Alexandra Beil
- Central Department for Clinical Chemistry, University Hospital Ulm, Ulm, Germany
| | - Joris Kroschel
- Central Department for Clinical Chemistry, University Hospital Ulm, Ulm, Germany
| | - Frank Kirchhoff
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
- Core Facility Functional Peptidomics, Ulm University Medical Center, Ulm, Germany
| | - Janis A. Müller
- Institute of Molecular Virology, Ulm University Medical Center, Ulm, Germany
- Institute of Virology, Philipps University of Marburg, Marburg, Germany
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Perkhofer L, Nägele J, Kroschel J, Mayer B, Müller* M, Seufferlein* T. Acute Reactions After Vaccination Against COVID-19 and Long-Term Antibody Levels. Dtsch Arztebl Int 2022; 119:484-485. [PMID: 36342091 PMCID: PMC9664982 DOI: 10.3238/arztebl.m2022.0195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 01/28/2022] [Accepted: 04/06/2022] [Indexed: 01/04/2023]
Affiliation(s)
- Lukas Perkhofer
- Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Jana Nägele
- Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Joris Kroschel
- Central Department for Clinical Chemistry, Ulm University Hospital, Ulm, Germany
| | - Benjamin Mayer
- Institute for Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
| | - Martin Müller*
- *The authors share joint last authorship.,Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
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Groß R, Zanoni M, Seidel A, Conzelmann C, Gilg A, Krnavek D, Erdemci-Evin S, Mayer B, Hoffmann M, Pöhlmann S, Liu W, Hahn BH, Beil A, Kroschel J, Jahrsdörfer B, Schrezenmeier H, Kirchhoff F, Münch J, Müller JA. Heterologous ChAdOx1 nCoV-19 and BNT162b2 prime-boost vaccination elicits potent neutralizing antibody responses and T cell reactivity against prevalent SARS-CoV-2 variants. EBioMedicine 2021; 75:103761. [PMID: 34929493 PMCID: PMC8682749 DOI: 10.1016/j.ebiom.2021.103761] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/27/2021] [Accepted: 12/02/2021] [Indexed: 11/03/2022] Open
Abstract
Background Heterologous COVID-19 vaccination regimens combining vector- and mRNA-based vaccines are already administered, but data on solicited adverse reactions, immunological responses and elicited protection are limited. Methods To evaluate the reactogenicity and humoral as well as cellular immune responses towards most prevalent SARS-CoV-2 variants after a heterologous ChAdOx1 nCoV-19 BNT162b2 prime-boost vaccination, we analysed a cohort of 26 clinic employees aged 25-46 (median 30.5) years who received a ChAdOx1 nCoV-19 prime followed by a BNT162b2 boost after an 8-week interval. Serological data were compared to a cohort which received homologous BNT162b2 vaccination with a 3-week interval (14 individuals aged 25-65, median 42). Findings Self-reported solicited symptoms after ChAdOx1 nCoV-19 prime were in line with previous reports and more severe than after the BNT162b2 boost. Antibody titres increased significantly over time resulting in strong neutralization titres two weeks after the BNT162b2 boost and subsequently slightly decreased over the course of 17 weeks. At the latest time point measured, all analysed sera retained neutralizing activity against the currently dominant Delta (B.1.617.2) variant. Two weeks post boost, neutralizing activity against the Alpha (B.1.1.7) and immune-evading Beta (B.1.351) variant was ∼4-fold higher than in individuals receiving homologous BNT162b2 vaccination. No difference was observed in neutralization of Kappa (B.1.617.1). In addition, heterologous vaccination induced CD4+ and CD8+ T cells reactive to SARS-CoV-2 spike peptides of all analysed variants; Wuhan-Hu-1, Alpha, Beta, Gamma (P.1), and Delta. Interpretation In conclusion, heterologous ChAdOx1 nCoV-19 / BNT162b2 prime-boost vaccination is not associated with serious adverse events and induces potent humoral and cellular immune responses. The Alpha, Beta, Delta, and Kappa variants of spike are potently neutralized by sera from all participants and reactive T cells recognize spike peptides of all tested variants. These results suggest that this heterologous vaccination regimen is at least as immunogenic and protective as homologous vaccinations and also offers protection against current variants of concern. Funding This project has received funding from the European Union's Horizon 2020 research and innovation programme, the German Research Foundation, the BMBF, the Robert Koch Institute (RKI), the Baden-Württemberg Stiftung, the county of Lower Saxony, the Ministry for Science, Research and the Arts of Baden-Württemberg, Germany, and the National Institutes of Health.
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Affiliation(s)
- Rüdiger Groß
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Michelle Zanoni
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Alina Seidel
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Carina Conzelmann
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Andrea Gilg
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Daniela Krnavek
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Sümeyye Erdemci-Evin
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Benjamin Mayer
- Institute for Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
| | - Markus Hoffmann
- Infection Biology Unit, German Primate Center - Leibniz Institute for Primate Research, Göttingen, Germany; Faculty of Biology and Psychology, Georg-August-University Göttingen, Göttingen, Germany
| | - Stefan Pöhlmann
- Infection Biology Unit, German Primate Center - Leibniz Institute for Primate Research, Göttingen, Germany; Faculty of Biology and Psychology, Georg-August-University Göttingen, Göttingen, Germany
| | - Weimin Liu
- Department of Microbiology and Department of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Beatrice H Hahn
- Department of Microbiology and Department of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Alexandra Beil
- Central Department for Clinical Chemistry, University Hospital Ulm, 89081, Ulm, Germany
| | - Joris Kroschel
- Central Department for Clinical Chemistry, University Hospital Ulm, 89081, Ulm, Germany
| | - Bernd Jahrsdörfer
- Institute for Transfusion Medicine, Ulm University, 89081, Ulm, Germany; Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, German Red Cross Blood Services Baden-Württemberg-Hessen and University Hospital Ulm, 89081, Ulm, Germany
| | - Hubert Schrezenmeier
- Institute for Transfusion Medicine, Ulm University, 89081, Ulm, Germany; Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, German Red Cross Blood Services Baden-Württemberg-Hessen and University Hospital Ulm, 89081, Ulm, Germany
| | - Frank Kirchhoff
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany
| | - Jan Münch
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany; Core Facility Functional Peptidomics, Ulm University Medical Center, 89081, Ulm, Germany
| | - Janis A Müller
- Institute of Molecular Virology, Ulm University Medical Center, 89081, Ulm, Germany.
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Perkhofer L, Grünke P, Gashi-Ymeri E, Grünke T, Kroschel J, Michel D, Pensel E, Rost A, Denkinger M, Dallmeier D, Seufferlein T. [COVID-19 pandemic-related burden and SARS-CoV-2 prevalence in care facilities]. Z Gerontol Geriatr 2021; 54:463-470. [PMID: 34259902 PMCID: PMC8278814 DOI: 10.1007/s00391-021-01931-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/02/2021] [Indexed: 11/23/2022]
Abstract
Hintergrund Pflegeeinrichtungen sind Belastungen der COVID-19-Pandemie gegenüber besonders exponiert, sowohl in personellen wie strukturellen Bereichen. Ziel der Arbeit Prospektive Querschnittsstudie zum punktuellen Infektionsgeschehen, zu psychosozialen Belastungen und zum Umgang der Einrichtungen mit der COVID-19-Pandemie. Material und Methoden Systematische Datenerhebung zwischen dem 27.07.2020 und dem 25.08.2020 in 7 Pflegeeinrichtungen in Baden-Württemberg. Dies beinhaltete für Bewohner/Mitarbeiter einen Fragebogen, eine SARS-CoV-2-PCR und Antikörpertestung. Die Einrichtungen wurden auf Umgang und Präventionsmaßnahmen befragt. Ergebnisse Von insgesamt 829 SARS-CoV-2-PCR-Tests waren 100 % negativ. 2 Probanden hatten SARS-CoV-2-Antikörper, allerdings ohne positive Anamnese. Keiner der Probanden mit positiver PCR in der Anamnese (n = 6) hatte nachweisbare Antikörper. Mitarbeiter hatten Angst, Mitmenschen, v. a. Heimbewohner, (54,4 %) anzustecken, weniger sich selbst (27,2 %). Als pandemieassoziierte Belastungen wurden in 17,1 % Erschöpfung, 16 % finanzielle Ängste und 13,1 % Schlafstörungen angegeben. Die Bewältigungsstrategien umfassten einen moderaten Anstieg schädlichen Konsumverhaltens (+3,3 % Alkohol, +4,3 % Nikotin). Wesentlich kritischer war dies bei unter 35-Jährigen (+13 % Alkohol, +12,7 % Nikotin). Frauen gaben eine Zunahme des Medikamentengebrauchs um 2,4 % an. 49,8 % der Befragten reduzierten ihre Sozialkontakte, 76,8 % veränderten ihr Hygieneverhalten. Die Einrichtungen waren eingeschränkt auf die COVID-19-Pandemie vorbereitet. Diskussion Trotz der niedrigen Punktprävalenz zum Zeitpunkt der Erhebung belastete die COVID-19-Pandemie die Pflegeeinrichtungen in vielfachen Aspekten. Aus den entstandenen Belastungen bei Mitarbeitern müssen Bewältigungs- und Präventionskonzepte resultieren. Zusatzmaterial online Zusätzliche Informationen sind in der Online-Version dieses Artikels (10.1007/s00391-021-01931-6) enthalten.
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Affiliation(s)
- Lukas Perkhofer
- Klinik für Innere Medizin 1, Universitätsklinikum Ulm, Ulm, Deutschland
| | - Peter Grünke
- Klinik für Innere Medizin 1, Universitätsklinikum Ulm, Ulm, Deutschland
| | | | - Teresa Grünke
- Klinik für Innere Medizin 1, Universitätsklinikum Ulm, Ulm, Deutschland
| | - Joris Kroschel
- Zentrale Einrichtung Klinische Chemie, Universitätsklinikum Ulm, Ulm, Deutschland
| | - Detlef Michel
- Institut für Virologie, Universitätsklinikum Ulm, Ulm, Deutschland
| | - Elke Pensel
- Institut für Klinische Transfusionsmedizin und Immungenetik Ulm, Deutsches Rotes Kreuz Blutspendedienst Baden-Württemberg-Hessen und Universitätsklinikum Ulm, Ulm, Deutschland
| | - Andreas Rost
- Kreis-Katastrophenschutz & Notfalldienst Alb-Donau Kreis, Ulm, Deutschland
| | - Michael Denkinger
- Institut für Geriatrische Forschung, Universitätsklinikum Ulm, Ulm, Deutschland.,AGAPLESION Bethesda Klinik Ulm, Ulm, Deutschland.,Geriatrisches Zentrum Ulm/Alb-Donau, Ulm, Deutschland
| | - Dhayana Dallmeier
- AGAPLESION Bethesda Klinik Ulm, Ulm, Deutschland.,Geriatrisches Zentrum Ulm/Alb-Donau, Ulm, Deutschland.,Department of Epidemiology, Boston University School of Public Health, Boston, USA
| | - Thomas Seufferlein
- Klinik für Innere Medizin 1, Universitätsklinikum Ulm, Ulm, Deutschland.
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7
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Jahrsdörfer B, Kroschel J, Ludwig C, Corman VM, Schwarz T, Körper S, Rojewski M, Lotfi R, Weinstock C, Drosten C, Seifried E, Stamminger T, Groß HJ, Schrezenmeier H. Independent Side-by-Side Validation and Comparison of 4 Serological Platforms for SARS-CoV-2 Antibody Testing. J Infect Dis 2021; 223:796-801. [PMID: 33064789 PMCID: PMC7665624 DOI: 10.1093/infdis/jiaa656] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/14/2020] [Indexed: 01/09/2023] Open
Abstract
Highly sensitive and specific platforms for the detection of anti-SARS-CoV-2 antibodies are becoming increasingly important for (1) evaluating potential SARS-CoV-2 convalescent plasma donors, (2) studying the spread of SARS-CoV-2 infections and (3) identifying individuals with seroconversion. This study provides a comparative validation of four anti-SARS-CoV-2 platforms. Unique feature of this study is the use of a representative cohort of COVID-19-convalescent patients with mild-to-moderate disease course. All platforms showed significant correlations with a SARS-CoV-2 plaque-reduction-neutralization test, with highest sensitivities for the Euroimmun and the Roche platforms, suggesting their preferential use for screening of persons at increased risk of SARS-CoV-2 infections.
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Affiliation(s)
- Bernd Jahrsdörfer
- Department of Transfusion Medicine, Ulm University, Ulm, Germany.,Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen and University Hospital Ulm, Ulm, Germany
| | - Joris Kroschel
- Institute of Clinical Chemistry, Ulm University, Ulm, Germany
| | - Carolin Ludwig
- Department of Transfusion Medicine, Ulm University, Ulm, Germany
| | - Victor Max Corman
- Institute of Virology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Tatjana Schwarz
- Institute of Virology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Sixten Körper
- Department of Transfusion Medicine, Ulm University, Ulm, Germany.,Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen and University Hospital Ulm, Ulm, Germany
| | - Markus Rojewski
- Department of Transfusion Medicine, Ulm University, Ulm, Germany.,Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen and University Hospital Ulm, Ulm, Germany
| | - Ramin Lotfi
- Department of Transfusion Medicine, Ulm University, Ulm, Germany.,Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen and University Hospital Ulm, Ulm, Germany
| | - Christof Weinstock
- Department of Transfusion Medicine, Ulm University, Ulm, Germany.,Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen and University Hospital Ulm, Ulm, Germany
| | - Christian Drosten
- Institute of Virology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Erhard Seifried
- Institute of Transfusion Medicine and Immunohematology, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen, Frankfurt, Germany
| | | | | | - Hubert Schrezenmeier
- Department of Transfusion Medicine, Ulm University, Ulm, Germany.,Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg-Hessen and University Hospital Ulm, Ulm, Germany
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8
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Nirenberg HI, O'Donnell K, Kroschel J, Andrianaivo AP, Frank JM, Mubatanhema W. Two new species ofFusarium: Fusarium brevicatenulatumfrom the noxious weedStriga asiaticain Madagascar andFusarium pseudoanthophilumfromZea maysin Zimbabwe. Mycologia 2018. [DOI: 10.1080/00275514.1998.12026930] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Helgard I. Nirenberg
- Biologische Bundesanstalt für Land- und Forstwirtschaft, Institut für Mikrobiologie, Königin-Luise-Straβe 19, D-14195 Berlin, Germany
| | - Kerry O'Donnell
- Microbial Properties Research, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, Peoria, Illinois 61604 USA
| | - J. Kroschel
- Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) GmbH, University of Hohenheim (380), D-70593 Stuttgart, Germany
| | - A. P. Andrianaivo
- Centre National de la Recherche Appliquée au Developpement Rural, Division de Recherches Agronomiques, Division de Pathologie Vegetale, P.O. Box 1444 FOFIFA/Ambatobe - Antananarivo 101, Madagascar
| | - J. Mick Frank
- University of Surrey, Guildford, Surrey, GU2 5XH, England
| | - Wellington Mubatanhema
- University of Zimbabwe, Institute of Food, Nutrition and Family Sciences, P. O. Box MP 167, Mount Pleasant, Harare, Zimbabwe
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Khadioli N, Tonnang ZEH, Muchugu E, Ong'amo G, Achia T, Kipchirchir I, Kroschel J, Le Ru B. Effect of temperature on the phenology of Chilo partellus (Swinhoe) (Lepidoptera, Crambidae); simulation and visualization of the potential future distribution of C. partellus in Africa under warmer temperatures through the development of life-table parameters. Bull Entomol Res 2014; 104:809-822. [PMID: 25229840 DOI: 10.1017/s0007485314000601] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Maize (Zea mays) is a major staple food in Africa. However, maize production is severely reduced by damage caused by feeding lepidopteran pests. In East and Southern Africa, Chilo partellus is one of the most damaging cereal stem borers mainly found in the warmer lowland areas. In this study, it was hypothesized that the future distribution and abundance of C. partellus may be affected greatly by the current global warming. The temperature-dependent population growth potential of C. partellus was studied on artificial diet under laboratory conditions at six constant temperatures (15, 18, 20, 25, 28, 30, 32 and 35 °C), relative humidity of 75±5% and a photoperiod of L12:L12 h. Several non-linear models were fitted to the data to model development time, mortality and reproduction of the insect species. Cohort updating algorithm and rate summation approach were stochastically used for simulating age and stage structure populations and generate life-table parameters. For spatial analysis of the pest risk, three generic risk indices (index of establishment, generation number and activity index) were visualized in the geographical information system component of the advanced Insect Life Cycle modeling (ILCYM) software. To predict the future distribution of C. partellus we used the climate change scenario A1B obtained from WorldClim and CCAFS databases. The maps were compared with available data on the current distribution of C. partellus in Kenya. The results show that the development times of the different stages decreased with increasing temperatures ranging from 18 to 35 °C; at the extreme temperatures, 15 and 38 °C, no egg could hatch and no larvae completed development. The study concludes that C. partellus may potentially expands its range into higher altitude areas, highland tropics and moist transitional regions, with the highest maize potential where the species has not been recorded yet. This has serious implication in terms of food security since these areas produce approximately 80% of the total maize in East Africa.
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Affiliation(s)
- N Khadioli
- Icipe - African Insect Science for Food and Health,P.O. Box 30772-00100, Nairobi,Kenya
| | - Z E H Tonnang
- Icipe - African Insect Science for Food and Health,P.O. Box 30772-00100, Nairobi,Kenya
| | - E Muchugu
- Icipe - African Insect Science for Food and Health,P.O. Box 30772-00100, Nairobi,Kenya
| | - G Ong'amo
- Icipe - African Insect Science for Food and Health,P.O. Box 30772-00100, Nairobi,Kenya
| | - T Achia
- School of Mathematics,University of Nairobi,P.O. Box 30197-00100, Nairobi,Kenya
| | - I Kipchirchir
- School of Mathematics,University of Nairobi,P.O. Box 30197-00100, Nairobi,Kenya
| | - J Kroschel
- International Potato Center,Apartado 1558, Lima 12,Peru
| | - B Le Ru
- Unité de Recherche IRD 072,Icipe - African Insect Science for Food and Health,P.O. Box 30772, Nairobi,KenyaorUniversité Paris-Sud 11,91405 Orsay cedex,France
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Nirenberg HI, O'Donnell K, Kroschel J, Andrianaivo AP, Frank JM, Mubatanhema W. Two New Species of Fusarium: Fusarium brevicatenulatum from the Noxious Weed Striga asiatica in Madagascar and Fusarium pseudoanthophilum from Zea mays in Zimbabwe. Mycologia 1998. [DOI: 10.2307/3761404] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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