Development of Anti-Yersinia pestis Human Antibodies with Features Required for Diagnostic and Therapeutic Applications
Journal Article
·
· ImmunoTargets and Therapy
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Specifica Inc., Santa Fe, NM (United States)
Yersinia pestis is a category A infective agent that causes bubonic, septicemic, and pneumonic plague. Notably, the acquisition of antimicrobial or multidrug resistance through natural or purposed means qualifies Y. pestis as a potential biothreat agent. Therefore, high-quality antibodies designed for accurate and sensitive Y. pestis diagnostics, and therapeutics potentiating or replacing traditional antibiotics are of utmost need for national security and public health preparedness. Here, we describe a set of human monoclonal immunoglobulins (IgG1s) targeting Y. pestis fraction 1 (F1) antigen, previously derived from in vitro evolution of a phage-display library of single-chain antibodies (scFv). We extensively characterized these antibodies and their effect on bacterial and mammalian cells via: ELISA, flow cytometry, mass spectrometry, spectroscopy, and various metabolic assays. Two of our anti-F1 IgG (αF1Ig 2 and αF1Ig 8) stood out for high production yield, specificity, and stability. These two antibodies were additionally attractive in that they displayed picomolar affinity, did not compete when binding Y. pestis, and retained immunoreactivity upon chemical derivatization. Most importantly, these antibodies detected < 1,000 Y. pestis cells in sandwich ELISA, did not harm respiratory epithelial cells, induced Y. pestis agglutination at low concentration (350 nM), and caused apparent reduction in cell growth when radiolabeled at a nonagglutinating concentration (34 nM). These antibodies are amenable to the development of accurate and sensitive diagnostics and immuno/radioimmunotherapeutics.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1755889
- Report Number(s):
- LA-UR--20-30360
- Journal Information:
- ImmunoTargets and Therapy, Journal Name: ImmunoTargets and Therapy Vol. 9; ISSN 2253-1556
- Publisher:
- Dove PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of Phage-Based Single Chain Fv Antibody Reagents for Detection of Yersinia pestis
Lateral flow assay for detection of Yesinia pestis
Journal Article
·
Wed Dec 07 19:00:00 EST 2011
· PLoS ONE
·
OSTI ID:1627484
Lateral flow assay for detection of Yesinia pestis
Technical Report
·
Tue Nov 17 23:00:00 EST 2020
·
OSTI ID:1726123