Passive protection against anthrax by using a high-affinity antitoxin antibody fragment lacking an Fc region

Robert Mabry, Mridula Rani, Robert Geiger, Gene B. Hubbard, Ricardo Carrion, Kathleen Brasky, Jean L. Patterson, George Georgiou, B. L. Iverson

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

Passive immunization has been successfully employed for protection against bacterial and viral infections For over 100 years. Immunoglobulin Fc regions play a critical role in the clearance of bacterial pathogens by mediating antibody-dependent and complement-dependent cytotoxicity. Here we show that antibody fragments engineered to recognize the protective antigen component of the B. anthracis exotoxin with high affinity and conjugated to polyethylene glycol (PEG) for prolonged circulation half-life confer significant protection against inhalation anthrax despite their lack of Fc regions. The speed and lower manufacturing cost of bacterially expressed PEGylated antibody fragments could provide decisive advantages for anthrax prophylaxis. Importantly, our results suggest that PEGylated antibody fragments may represent a unique approach for mounting a rapid therapeutic response to emerging pathogen infections.

Original languageEnglish (US)
Pages (from-to)8362-8368
Number of pages7
JournalInfection and immunity
Volume73
Issue number12
DOIs
StatePublished - Dec 1 2005

ASJC Scopus subject areas

  • Parasitology
  • Microbiology
  • Immunology
  • Infectious Diseases

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    Mabry, R., Rani, M., Geiger, R., Hubbard, G. B., Carrion, R., Brasky, K., Patterson, J. L., Georgiou, G., & Iverson, B. L. (2005). Passive protection against anthrax by using a high-affinity antitoxin antibody fragment lacking an Fc region. Infection and immunity, 73(12), 8362-8368. https://doi.org/10.1128/IAI.73.12.8362-8368.2005