Open AccessMurine monoclonal antibody elicited with antibiotic-exposed Escherichia coli exerts protective capacity in experimental bacterial infections
Author(s) -
Maria Teresa Lun,
Aldo Amatucci,
Giammarco Raponi,
F Filadoro,
Armando Bartolazzi,
Rocco Fraioli,
Pier Giorgio Natali,
Carlo Mancini
Publication year - 1994
Publication title -
journal of medical microbiology/journal of medical microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 117
eISSN - 1473-5644
pISSN - 0022-2615
DOI - 10.1099/00222615-41-3-179
Subject(s) - escherichia coli , microbiology and biotechnology , monoclonal antibody , heterologous , epitope , biology , enterobacteriaceae , aztreonam , bacteria , antibiotics , isotype , antibody , antibiotic resistance , immunology , biochemistry , gene , imipenem , genetics
Escherichia coli pre-exposed to a sub-minimal inhibitory concentration (sub-MIC) of several antibiotics elicits an enhanced humoral response which is protective against challenges with untreated homologous and heterologous bacteria. To characterise the specificity of this response we produced murine monoclonal antibodies (MAbs) to aztreonam-treated E. coli O6:K-. This resulted in the identification of MAb MT 1F, of isotype IgG1, that recognised a 12-kDa protein component of the untreated bacterial cells. After passive transfer, the MAb displayed protective activity in mice infected with lethal doses of live E. coli O6:K- and E. coli O111:B4. In ELISA experiments the MAb cross-reacted with structures located on whole cells of E. coli O6:K-, E. coli O111:B4, E. coli J5 and Salmonella minnesota Re595 and it also exerted a bactericidal activity against live E. coli O6:K-. The modifications induced by antibiotic treatment may unmask bacterial epitopes that may elicit the production of MAbs endowed with protective capacity.