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© Research
Publication : Science translational medicine

Human antibody recognizing a quaternary epitope in the Puumala virus glycoprotein provides broad protection against orthohantaviruses.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Science translational medicine - 16 Mar 2022

Mittler E, Wec AZ, Tynell J, Guardado-Calvo P, Wigren-Byström J, Polanco LC, O'Brien CM, Slough MM, Abelson DM, Serris A, Sakharkar M, Pehau-Arnaudet G, Bakken RR, Geoghegan JC, Jangra RK, Keller M, Zeitlin L, Vapalahti O, Ulrich RG, Bornholdt ZA, Ahlm C, Rey FA, Dye JM, Bradfute SB, Strandin T, Herbert AS, Forsell MNE, Walker LM, Chandran K,

Link to Pubmed [PMID] – 35294259

Link to DOI – 10.1126/scitranslmed.abl5399

Sci Transl Med 2022 Mar; 14(636): eabl5399

The rodent-borne hantavirus Puumala virus (PUUV) and related agents cause hemorrhagic fever with renal syndrome (HFRS) in humans. Other hantaviruses, including Andes virus (ANDV) and Sin Nombre virus, cause a distinct zoonotic disease, hantavirus cardiopulmonary syndrome (HCPS). Although these infections are severe and have substantial case fatality rates, no FDA-approved hantavirus countermeasures are available. Recent work suggests that monoclonal antibodies may have therapeutic utility. We describe here the isolation of human neutralizing antibodies (nAbs) against tetrameric Gn/Gc glycoprotein spikes from PUUV-experienced donors. We define a dominant class of nAbs recognizing the “capping loop” of Gn that masks the hydrophobic fusion loops in Gc. A subset of nAbs in this class, including ADI-42898, bound Gn/Gc complexes but not Gn alone, strongly suggesting that they recognize a quaternary epitope encompassing both Gn and Gc. ADI-42898 blocked the cell entry of seven HCPS- and HFRS-associated hantaviruses, and single doses of this nAb could protect Syrian hamsters and bank voles challenged with the highly virulent HCPS-causing ANDV and HFRS-causing PUUV, respectively. ADI-42898 is a promising candidate for clinical development as a countermeasure for both HCPS and HFRS, and its mode of Gn/Gc recognition informs the development of broadly protective hantavirus vaccines.

https://pubmed.ncbi.nlm.nih.gov/35294259