Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID), National Institutes of Health/National Cancer Institute (NIH/NCI)
Primary Citation of Related Structures: 9MSN, 9MSO, 9MSP
PubMed Abstract:
The 2022 mpox outbreak highlighted the serious threat of monkeypox virus (MPXV), yet effective treatments are lacking. From an mpox-convalescent individual, we identified three high-affinity human monoclonal antibodies (mAbs) (named EV35-2, EV35-6, and EV35-7) that target the A35 protein in MPXV. These antibodies block viral spread in vitro and protect mice against lethal MPXV and vaccinia virus infection via both Fc-dependent and independent mechanisms. Levels of serum antibodies targeting the same epitopes are increased in mpox-convalescent humans, and higher levels of these antibodies in the sera are linked to shorter symptom duration and no hospitalization. Systems-level multivariate analysis indicated that mpox-convalescent serum antibodies targeting the same epitopic region as these three mAbs may function cooperatively, with additive associations to clinical protection. Two of the antibodies use a conserved IGHD2-21-encoded CxGGDCx motif in their CDRH3 region to bind a highly conserved poxvirus epitope. These findings establish A35 as a critical therapeutic target and highlight A35-specific mAbs as promising candidates for next-generation orthopoxvirus treatments.
Organizational Affiliation:
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Center for Vaccine Research and Pandemic Preparedness, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; The Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; The Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pharmaceutics, Ghent University, Ghent, Belgium.
Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA.
Recombinant Antibody and Antigen Development Unit, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Section of Infectious Diseases, Department of Medicine, Yale School of Medicine, New Haven, CT, USA; Yale Institute for Global Health, Yale University, New Haven, CT, USA.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Center for Vaccine Research and Pandemic Preparedness, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA; Yale Institute for Global Health, Yale University, New Haven, CT, USA; Department of Pediatrics, Section of Infectious Diseases and Global Health, Yale School of Medicine, New Haven, CT, USA; Center for Infection and Immunity, Yale University, New Haven, CT, USA.
Peter O'Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Center for Vaccine Research and Pandemic Preparedness, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Ignaz Semmelweis Institute, Interuniversity Institute for Infection Research, Medical University of Vienna, Vienna, Austria.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Center for Vaccine Research and Pandemic Preparedness, Icahn School of Medicine at Mount Sinai, New York, NY, USA; The Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA. Electronic address: viviana.simon@mssm.edu.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; The Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Precision Immunology Institute (PrIISM), Icahn School of Medicine at Mount Sinai, New York, NY, USA; Icahn Genomics Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA. Electronic address: michael.schotsaert@mssm.edu.
Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA. Electronic address: carolina.lucas@yale.edu.
Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, USA; The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA, USA. Electronic address: wilson@scripps.edu.
Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA. Electronic address: bmoss@niaid.nih.gov.
Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Center for Vaccine Research and Pandemic Preparedness, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Precision Immunology Institute (PrIISM), Icahn School of Medicine at Mount Sinai, New York, NY, USA. Electronic address: camila.coelho@mssm.edu.
Download Mendeley
