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Antimicrob Agents Chemother
2002 Jan 01;461:101-4. doi: 10.1128/AAC.46.1.101-104.2002.
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Single-dose intraperitoneal magainins improve survival in a gram-negative-pathogen septic shock rat model.
Cirioni O
,
Giacometti A
,
Ghiselli R
,
Mocchegiani F
,
Fineo A
,
Orlando F
,
Del Prete MS
,
Rocchi M
,
Saba V
,
Scalise G
.
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The therapeutic efficacies of three polycationic peptides selected among the class of the magainins (magainin I, magainin II, and magainin II amide), alone and combined with piperacillin, were investigated in a rat model of septic shock. Rats were given an intraperitoneal injection of 2 x 10(10) CFU of Escherichia coli and randomized to receive intraperitoneally isotonic sodium chloride solution, 60 mg of piperacillin per kg of body weight, and 1 mg of each magainin per kg alone and combined with 60 mg of piperacillin per kg. The main outcome measures were bacterial growth in abdominal exudate and plasma, endotoxin and tumor necrosis factor alpha (TNF-alpha) concentrations in plasma, and lethality. Treatments with the magainins achieved significant reductions of bacterial growth and plasma endotoxin and TNF-alpha concentrations. In general, treatments with the combinations of magainins and piperacillin demonstrated the highest efficacies.
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