Di-K19Hc, an antimicrobial peptide as new ototopical agent for treatment of otitis media.

Abstract:

CONCLUSION:Di-K19Hc is a promising new ototopical antibiotic for treatment of middle ear infections associated with antibiotic-resistant bacteria. OBJECTIVES:Di-K19Hc was previously shown to exert profound antimicrobial activity against a variety of antibiotic-resistant bacteria and fungi. In this study, we evaluated the potential use of di-K19Hc as a topical agent for the treatment of otitis media (OM) caused by a variety of microbial pathogens including bacteria resistant to conventional antibiotics. METHODS:Antimicrobial activity of di-K19Hc was measured by colony count assay. Hearing threshold was determined by measurement of auditory brainstem response in mice treated with di-K19Hc. Mice treated with gentamicin were used as a control. RESULTS:Di-K19Hc showed much stronger antimicrobial activity against methicillin-resistant Staphylococcus aureus and multidrug-resistant Pseudomonas aeruginosa associated with human OM than did ofloxacin. Also, it was shown that the peptide exhibited substantial dose-dependent antimicrobial activity against microbes from middle ear fluid of patients with OM. Topically applied di-K19Hc caused neither a decrease of hearing level nor loss of hair cells.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Lee YS,Kim YJ,Choi SH,Shin KH,Jang WS,Lee IH,Chung JW

doi

10.3109/00016480903536036

subject

Has Abstract

pub_date

2010-08-01 00:00:00

pages

897-903

issue

8

eissn

0001-6489

issn

1651-2251

journal_volume

130

pub_type

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