Daptomycin Exerts Bactericidal Activity without Lysis of Staphylococcus aureus

Author:

Cotroneo Nicole1,Harris Robert2,Perlmutter Nancy3,Beveridge Terry24,Silverman Jared A.1

Affiliation:

1. Cubist Pharmaceuticals, Inc., 65 Hayden Avenue, Lexington, Massachusetts 02421

2. University of Guelph, Guelph, Ontario, Canada N1G 2W1

3. Howard M. Shapiro, M.D., P.C., West Newton, Massachusetts

4. MicroTEM, Inc., Elora, Ontario, Canada N0B 1S0

Abstract

ABSTRACT The ability of daptomycin to produce bactericidal activity against Staphylococcus aureus while causing negligible cell lysis has been demonstrated using electron microscopy and the membrane integrity probes calcein and ToPro3. The formation of aberrant septa on the cell wall, suggestive of impairment of the cell division machinery, was also observed.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Pharmacology (medical),Pharmacology

Reference13 articles.

1. Benson, C. A., F. Beaudette, and G. Trenholm. 1987. Comparitive in vitro activity of LY146032 a new peptolide, with vancomycin and eight other agents against Gram-positive organisms. J. Antimicrob. Chemother.20:191-196.

2. Abstr. Pediatric Academic Societies' Annual Meeting Washington DC. abstr. 507. 2005

3. Prevention of Brain Injury by the Nonbacteriolytic Antibiotic Daptomycin in Experimental Pneumococcal Meningitis

4. King, A., and I. Phillips. 2001. The in vitro activity of daptomycin against 514 Gram-positive aerobic clinical isolates. J. Antimicrob. Chemother.48:219-223.

5. Lakey, J. H., and M. Ptak. 1988. Fluorescence indicates a calcium-dependent interaction between the lipopeptide antibiotic LY146032 and phospholipid membranes. Biochemistry27:4639-4645.

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