Inhaled 'Muco‐Trapping' Monoclonal Antibody Effectively Treats Established Respiratory Syncytial Virus (RSV) Infections

Autor: Morgan D. McSweeney, Sarhad Alnajjar, Alison M. Schaefer, Zach Richardson, Whitney Wolf, Ian Stewart, Pun Sriboonyapirat, Justin McCallen, Ellen Farmer, Bernadette Nzati, Sam Lord, Brian Farrer, Thomas R. Moench, Priya A. Kumar, Harendra Arora, Raymond J. Pickles, Anthony J. Hickey, Mark Ackermann, Samuel K. Lai
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Advanced Science, Vol 11, Iss 12, Pp n/a-n/a (2024)
Druh dokumentu: article
ISSN: 2198-3844
20230672
DOI: 10.1002/advs.202306729
Popis: Abstract Respiratory syncytial virus (RSV) causes substantial morbidity and mortality in infants, the immunocompromised, and the elderly. RSV infects the airway epithelium via the apical membrane and almost exclusively sheds progeny virions back into the airway mucus (AM), making RSV difficult to target by systemically administered therapies. An inhalable “muco‐trapping” variant of motavizumab (Mota‐MT), a potent neutralizing mAb against RSV F is engineered. Mota‐MT traps RSV in AM via polyvalent Fc‐mucin bonds, reducing the fraction of fast‐moving RSV particles in both fresh pediatric and adult AM by ≈20–30‐fold in a Fc‐glycan dependent manner, and facilitates clearance from the airways of mice within minutes. Intranasal dosing of Mota‐MT eliminated viral load in cotton rats within 2 days. Daily nebulized delivery of Mota‐MT to RSV‐infected neonatal lambs, beginning 3 days after infection when viral load is at its maximum, led to a 10 000‐fold and 100 000‐fold reduction in viral load in bronchoalveolar lavage and lung tissues relative to placebo control, respectively. Mota‐MT‐treated lambs exhibited reduced bronchiolitis, neutrophil infiltration, and airway remodeling than lambs receiving placebo or intramuscular palivizumab. The findings underscore inhaled delivery of muco‐trapping mAbs as a promising strategy for the treatment of RSV and other acute respiratory infections.
Databáze: Directory of Open Access Journals
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