2003
DOI: 10.1038/nbt891
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Human antibodies from immunized donors are protective against anthrax toxin in vivo

Abstract: A panel of Fabs that neutralize anthrax toxin in vitro was selected from libraries generated from human donors vaccinated against anthrax. At least two of these antibodies protect rats from anthrax intoxication in vivo. Fabs 83K7C and 63L1D bind with subnanomolar affinity to protective antigen (PA) 63, and Fab 63L1D neutralizes toxin substoichiometrically, inhibits lethal factor (LF) interaction with PA63 and binds to a conformational epitope formed by PA63.

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Cited by 91 publications
(85 citation statements)
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“…In the past, the major roadblock to the adoption of this approach for the treatment of humans has been access to high affinity, anthrax toxin-specific antibodies that are non-toxic to humans, possess a significantly long half-life, and that can be produced on a commercial scale. To address these issues, researchers have been attempting to develop humanized or fully human PA-specific toxin neutralizing monoclonal antibodies [15,16].…”
Section: Discussionmentioning
confidence: 99%
“…In the past, the major roadblock to the adoption of this approach for the treatment of humans has been access to high affinity, anthrax toxin-specific antibodies that are non-toxic to humans, possess a significantly long half-life, and that can be produced on a commercial scale. To address these issues, researchers have been attempting to develop humanized or fully human PA-specific toxin neutralizing monoclonal antibodies [15,16].…”
Section: Discussionmentioning
confidence: 99%
“…First strand cDNA was synthesized using SuperScript First-Strand Synthesis System for RT-PCR (Invitrogen Life Technologies), according to the manufacturer's protocol. Second strand cDNA synthesis and single primer PCR were performed, as previously described (24), with modifications for mouse primers and oligonucleotides. Amplified products were purified using PCR purification columns (Qiagen), digested with appropriate restriction endonucleases, and cloned into an IgG1 Fab expression vector.…”
Section: Phage Display Library Constructionmentioning
confidence: 99%
“…Les Ac recombinants sont généralement obtenus en deux étapes : obtention d'un fragment d'Ac qui se fixe à l'agent devant être neutralisé, puis synthèse d'une IgG entière à partir de ce fragment. Des fragments d'Ac recombinants se fixant sur l'une des sous-unités de la toxine létale du charbon, appelée antigène protecteur, ont été obtenus par plusieurs équipes dont la nôtre [5][6][7][8][9][10][11]. Ils pourraient prévenir ou traiter cette maladie plus efficacement que les antibiotiques seuls.…”
Section: Stratégies D'obtention Et D'optimisation Des Anticorps Recomunclassified
“…Toutefois, cette stratégie est plus efficace lorsqu'elle débute en utilisant des lymphocytes B de donneurs humains immunisés contre l'agent d'intérêt. De telles cellules sont disponibles aux États-Unis dans le cas du charbon [8] puisque la prévention de cette maladie est obtenue chez les militaires par une vaccination qui repose sur l'utilisation de l'antigène protecteur (AP) 3 comme immunogène. Dans d'autres cas, comme le botulisme, des essais de vaccination ont permis d'obtenir de tels lymphocytes [21].…”
unclassified