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Ogoti BM, Riitho V, Wildemann J, Mutono N, Tesch J, Rodon J, Harichandran K, Emanuel J, Möncke-Buchner E, Kiambi S, Oyugi J, Mureithi M, Corman VM, Drosten C, Thumbi SM, Müller MA. Biphasic MERS-CoV Incidence in Nomadic Dromedaries with Putative Transmission to Humans, Kenya, 2022-2023. Emerg Infect Dis 2024; 30:581-585. [PMID: 38407189 PMCID: PMC10902546 DOI: 10.3201/eid3003.231488] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024] Open
Abstract
Middle East respiratory syndrome coronavirus (MERS-CoV) is endemic in dromedaries in Africa, but camel-to-human transmission is limited. Sustained 12-month sampling of dromedaries in a Kenya abattoir hub showed biphasic MERS-CoV incidence; peak detections occurred in October 2022 and February 2023. Dromedary-exposed abattoir workers (7/48) had serologic signs of previous MERS-CoV exposure.
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Affiliation(s)
| | | | | | - Nyamai Mutono
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Julia Tesch
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Jordi Rodon
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Kaneemozhe Harichandran
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Jackson Emanuel
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Elisabeth Möncke-Buchner
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Stella Kiambi
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Julius Oyugi
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Marianne Mureithi
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Victor M. Corman
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
| | - Christian Drosten
- University of Nairobi, Nairobi, Kenya (B.M. Ogoti, V. Riitho, N. Mutono, J. Oyugi, M. Mureithi, S.M. Thumbi)
- Queen Mary University of London, London, UK (V. Riitho)
- Charité–Universitätsmedizin Berlin, Berlin, Germany (J. Wildemann, J. Tesch, J. Rodon, K. Harichandran, J. Emanuel, E. Möncke-Buchner, V.M. Corman, C. Drosten, M.A. Müller)
- Washington State University, Pullman, Washington, USA (N. Mutono, S.M. Thumbi)
- Food and Agriculture Organization, Dar es Salaam, Tanzania (S. Kiambi)
- Labor Berlin–Charité Vivantes GmbH, Berlin (V.M. Corman)
- German Center for Infection Research, Berlin (V.M. Corman, C. Drosten, M.A. Müller)
- University of Edinburgh, Edinburgh, Scotland, UK (S.M. Thumbi)
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Van de Walle I, Silence K, Budding K, Van de Ven L, Dijkxhoorn K, de Zeeuw E, Yildiz C, Gabriels S, Percier JM, Wildemann J, Meeldijk J, Simons PJ, Boon L, Cox L, Holgate R, Urbanus R, Otten HG, Leusen JHW, Blanchetot C, de Haard H, Hack CE, Boross P. ARGX-117, a therapeutic complement inhibiting antibody targeting C2. J Allergy Clin Immunol 2020; 147:1420-1429.e7. [PMID: 32926878 PMCID: PMC7485568 DOI: 10.1016/j.jaci.2020.08.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 08/03/2020] [Accepted: 08/11/2020] [Indexed: 02/07/2023]
Abstract
Background Activation of the classical and lectin pathway of complement may contribute to tissue damage and organ dysfunction of antibody-mediated diseases and ischemia-reperfusion conditions. Complement factors are being considered as targets for therapeutic intervention. Objective We sought to characterize ARGX-117, a humanized inhibitory monoclonal antibody against complement C2. Methods The mode-of-action and binding characteristics of ARGX-117 were investigated in detail. Furthermore, its efficacy was analyzed in in vitro complement cytotoxicity assays. Finally, a pharmacokinetic/pharmacodynamic study was conducted in cynomolgus monkeys. Results Through binding to the Sushi-2 domain of C2, ARGX-117 prevents the formation of the C3 proconvertase and inhibits classical and lectin pathway activation upstream of C3 activation. As ARGX-117 does not inhibit the alternative pathway, it is expected not to affect the antimicrobial activity of this complement pathway. ARGX-117 prevents complement-mediated cytotoxicity in in vitro models for autoimmune hemolytic anemia and antibody-mediated rejection of organ transplants. ARGX-117 exhibits pH- and calcium-dependent target binding and is Fc-engineered to increase affinity at acidic pH to the neonatal Fc receptor, and to reduce effector functions. In cynomolgus monkeys, ARGX-117 dose-dependently reduces free C2 levels and classical pathway activity. A 2-dose regimen of 80 and 20 mg/kg separated by a week, resulted in profound reduction of classical pathway activity lasting for at least 7 weeks. Conclusions ARGX-117 is a promising new complement inhibitor that is uniquely positioned to target both the classical and lectin pathways while leaving the alternative pathway intact.
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Affiliation(s)
| | | | - Kevin Budding
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | - Kim Dijkxhoorn
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Elisabeth de Zeeuw
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Cafer Yildiz
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | | | - Johanna Wildemann
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jan Meeldijk
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | | | - Linda Cox
- Bioceros BV, Utrecht, The Netherlands
| | | | - Rolf Urbanus
- Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands; Van Creveldkliniek, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Henny G Otten
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Jeanette H W Leusen
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | | | - C Erik Hack
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands; Prothix BV, Leiden, The Netherlands
| | - Peter Boross
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands; Prothix BV, Leiden, The Netherlands.
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