Abstract：
BACKGROUND:Gram-negative infections are a major cause of morbidity and death. Bactericidal permeability-increasing protein (BPI) is an endotoxin-neutralizing protein that also exhibits potent bactericidal activity. This study compared the efficacy of a 23 kd recombinant N-terminal fragment of BPI (rBPI23) with that of antiendotoxin antibody E5 in a model of gram-negative sepsis. METHODS:Sixty Swiss-Webster mice (Carworth farm) received an intratracheal inoculation of Escherichia coli (7 x 10(6) colony-forming units) and were randomized to three groups (20 per group). Starting immediately after inoculation, the groups received either rBPI23 (4 mg/kg intravenously every 2 hours for four doses), E5 (11 mg/kg intravenously every 24 hours for two doses), or an isotype control antibody B55 (11 mg/kg intravenously every 24 hours for two doses) and were followed up for survival. In a second survival study, 40 mice received the same intratracheal inoculation of E. coli and were randomized to two groups. Starting 2 hours after inoculation, the groups received either rBPI23 (4 mg/kg intravenously every 2 hours for four doses) or E5 (8 mg/kg intravenously every 12 hours for four doses) and were followed up for survival. In a third study, mice received an intratracheal inoculation of 3 x 10(6) colony-forming units E. coli, a sublethal dose, and were killed to determine pulmonary and blood clearance of bacteria. RESULTS:rBPI23 conferred significantly greater protection from death than either E5 or B55 when started immediately (95% survival vs 20% and 10%, respectively; p < 0.001) or 2 hours after inoculation (65% survival vs 25% for E5; p < 0.05). Both pulmonary and vascular clearance of bacteria was enhanced significantly by treatment with rBPI23. CONCLUSIONS:rBPI23 may be a novel therapeutic agent in the management of gram-negative sepsis.
journal_name
Surgeryjournal_title
Surgeryauthors
Kelly CJ,Cech AC,Argenteanu M,Gallagher H,Shou J,Minnard E,Daly JMsubject
Has Abstractpub_date
1993-08-01 00:00:00pages
140-6issue
2eissn
0039-6060issn
1532-7361journal_volume
114pub_type
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