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Int J Antimicrob Agents. 2010 Sep;36(3):264-6. doi: 10.1016/j.ijantimicag.2010.04.008.

The antimicrobial peptide Ci-MAM-A24 is highly active against multidrug-resistant and anaerobic bacteria pathogenic for humans.

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Zoological Institute, Zoophysiology, University of Kiel, Olshausenstrasse 40, 24098 Kiel, Germany.


Ci-MAM-A24, a synthetic antimicrobial peptide derived from a peptide precursor from immune cells of the marine invertebrate Ciona intestinalis, has been shown to be potently active against representatives of Gram-positive and Gram-negative bacteria by permeabilising their cytoplasmic membrane. In the present study, the activity of Ci-MAM-A24 against different bacterial pathogens frequently causing therapeutic problems was tested. In particular, the killing capacity of Ci-MAM-A24 against clinically important anaerobic bacteria as well as multiresistant aerobic strains such as meticillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci, extended-spectrum beta-lactamase-producers and multiple-resistant Pseudomonas aeruginosa strains was monitored. Virtually all strains proved to be highly susceptible to Ci-MAM-A24 at low concentrations [minimum bactericidal concentration (MBC)<10 microg/mL].

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