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Phase II, randomized, double-blind, multicenter study comparing the safety and pharmacokinetics of tefibazumab to placebo for treatment of Staphylococcus aureus bacteremia.


ABSTRACT: Tefibazumab (Aurexis), a humanized monoclonal antibody that binds to the surface-expressed adhesion protein clumping factor A, is under development as adjunctive therapy for serious Staphylococcus aureus infections. Sixty patients with documented S. aureus bacteremia (SAB) were randomized and received either tefibazumab at 20 mg/kg of body weight as a single infusion or a placebo in addition to an antibiotic(s). The primary objective of the study was determining safety and pharmacokinetics. An additional objective was to assess activity by a composite clinical end point (CCE). Baseline characteristics were evenly matched between groups. Seventy percent of infections were healthcare associated, and 57% had an SAB-related complication at baseline. There were no differences between the treatment groups in overall adverse clinical events or alterations in laboratory values. Two patients developed serious adverse events that were at least possibly related to tefibazumab; one hypersensitivity reaction was considered definitely related. The tefibazumab plasma half-life was 18 days. Mean plasma levels were <100 microg/ml by day 14. A CCE occurred in six patients (four placebo and two tefibazumab patients) and included five deaths (four placebo and one tefibazumab patient). Progression in the severity of sepsis occurred in four placebo and no tefibazumab patients. Tefibazumab was well tolerated, with a safety profile similar to those of other monoclonal antibodies. Additional trials are warranted to address the dosing range and efficacy of tefibazumab.

SUBMITTER: Weems JJ 

PROVIDER: S-EPMC1538656 | biostudies-literature | 2006 Aug

REPOSITORIES: biostudies-literature

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Phase II, randomized, double-blind, multicenter study comparing the safety and pharmacokinetics of tefibazumab to placebo for treatment of Staphylococcus aureus bacteremia.

Weems J John JJ   Steinberg James P JP   Filler Scott S   Baddley John W JW   Corey G Ralph GR   Sampathkumar Priya P   Winston Lisa L   John Joseph F JF   Kubin Christine J CJ   Talwani Rohit R   Moore Thomas T   Patti Joseph M JM   Hetherington Seth S   Texter Michele M   Wenzel Eric E   Kelley Violet A VA   Fowler Vance G VG  

Antimicrobial agents and chemotherapy 20060801 8


Tefibazumab (Aurexis), a humanized monoclonal antibody that binds to the surface-expressed adhesion protein clumping factor A, is under development as adjunctive therapy for serious Staphylococcus aureus infections. Sixty patients with documented S. aureus bacteremia (SAB) were randomized and received either tefibazumab at 20 mg/kg of body weight as a single infusion or a placebo in addition to an antibiotic(s). The primary objective of the study was determining safety and pharmacokinetics. An a  ...[more]

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