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Title 

Antibiotic activity and synergistic effect of antimicrobial peptide against pathogens from a patient with gallstones

Authors 

Y K ParkS N ParkS C ParkJ Y ParkYong Ha ParkJ S HahmK S Hahm

Publisher 

Elsevier

Issue Date 

2004

Citation 

Biochemical and Biophysical Research Communications, vol. 321, no. 3, pp. 631-637

Keywords 

antibiotic activitycefazolin sodiumcombination studypseudomonas aeruginosaantimicrobial peptide HP [2-20]cefazolinpeptideunclassified drugantimicrobial activitycell surface

Abstract 

HP (2-20) is a peptide derived from the N-terminus of Helicobacter pylori ribosomal protein L1 that has been shown to have antimicrobial activity against various species of bacteria. When we tested the effects of HP (2-20), we found that this peptide displayed strong activity against pathogens from a patient with gallstones, but it did not have hemolytic activity against human erythrocytes. We also found that HP (2-20) had potent activity against cefazolin sodium-resistant bacterial cell lines, and that HP (2-20) and cefazolin sodium had synergistic effects against cell lines resistant to the latter. To investigate the mechanism of action of HP (2-20), we performed fluorescence activated flow cytometry using pathogens from the patient with gallstones. As determined by propidium iodide (PI) staining, pathogenic bacteria treated with HP (2-20) showed higher fluorescence intensity than untreated cells, similar to melittin-treated cells, and that HP (2-20) acted in an energy- and salt-dependent manner. Scanning electron microscopy showed that HP (2-20) caused significant morphological alterations in the cell surface of pathogens from the patient with gallstones. By determining their 16S rDNA sequences, we found that both the pathogens from the patient with gallstones and the cefazolin sodium-resistant cell lines showed 100% homology with sequences from Pseudomonas aeruginosa. Taken together, these results suggest that HP (2-20) has antibiotic activity and that it may be used as a lead drug for the treatment of acquired pathogens from patients with gallstones and antibiotic-resistant cell lines.

ISSN 

0006-291X

Link 

http://dx.doi.org/10.1016/j.bbrc.2004.07.008

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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