title: Production and characterization of human monoclonal antibody recognizing the N-terminal residues of Pseudomonas aeruginosa exotoxin A.
abstract: Human cell lines producing monoclonal antibodies (MAbs) against Pseudomonas aeruginosa exotoxin A were established by EBV transformation followed by cell fusion. Monoclonal antibody FK-001, IgM (mu, kappa), was demonstrated to be specifically reactive with exotoxin A in ELISA and immunoblotting, by recognizing N-terminal 16 amino acid residues of exotoxin A as an epitope. This epitope region belongs to domain I which is required for the binding of exotoxin A to the receptor on target cells. FK-001 showed a partial neutralizing activity for cell toxicity caused by exotoxin A and appeared to be effective against exotoxin A-producing P. aeruginosa infection in mice. A line of evidence suggests that monoclonal antibody FK-001 neutralizes exotoxin A-induced cell toxicity by the interference of accessibility and/or binding of exotoxin A to animal cell receptors.
authors.affiliation: Laboratory of Biotechnology, Takarazuka Research Center, Sumitomo Chemical Co., Ltd., Hyogo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ohtsuka
authors.forename: K
authors.initials: K
authors.lastname: Horigome
authors.forename: H
authors.initials: H
authors.lastname: Ochi
authors.forename: T
authors.initials: T
authors.lastname: Nishimoto
authors.forename: T
authors.initials: T
authors.lastname: Kozuki
authors.forename: M
authors.initials: M
authors.lastname: Kato
authors.forename: T
authors.initials: T
authors.lastname: Okuda
authors.forename: H
authors.initials: H
authors.lastname: Noguchi
mesh_terms: D036002:ADP Ribose Transferases; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000302:isolation & purification / Q000627:therapeutic use; D001427:Bacterial Toxins; D002459:Cell Fusion; D002461:Cell Line, Transformed; D005098:Exotoxins / Q000276:immunology*; D004854:Herpesvirus 4, Human; D006801:Humans; D007116:Immunization, Passive; D051379:Mice; D008807:Mice, Inbred BALB C; D009500:Neutralization Tests; D011552:Pseudomonas Infections / Q000517:prevention & control; D011550:Pseudomonas aeruginosa / Q000276:immunology*; D011817:Rabbits; D037521:Virulence Factors; D000097668:Pseudomonas aeruginosa Exotoxin A
chemical_list: D036002:ADP Ribose Transferases; D000911:Antibodies, Monoclonal; D001427:Bacterial Toxins; D005098:Exotoxins; D037521:Virulence Factors; D000097668:Pseudomonas aeruginosa Exotoxin A