Antimicrobial activities of LL-37 and its truncated variants against Burkholderia thailandensis.
Int J Antimicrob Agents
; 36(5): 447-52, 2010 Nov.
Article
en En
| MEDLINE
| ID: mdl-20685090
ABSTRACT
Antimicrobial peptides (AMPs) are essential host defence molecules found in a wide variety of species and are promising antibacterial therapeutic candidates. Focusing on the human cathelicidin peptide LL-37, the aim of the present study was to explore the mechanisms of action and antimicrobial activities of a library of LL-37 fragments using Burkholderia thailandensis E264 as a model. The results revealed that IG-19 was the shortest fragment within LL-37 that exhibited antibacterial activity. LL-31, missing six residues at the C-terminus of LL-37, exhibited the strongest killing effect. Freeze-fracture electron microscopy of bacterial cells treated with either LL-37 or LL-31 revealed irregular bacterial surfaces with bleb projections, indicating that these peptides disrupted the integrity of the membrane. In addition, these peptides induced leakage of cell components, including nucleotides and even proteins. Altogether, the results obtained indicate the potential of using LL-31 as a new AMP to combat Burkholderia spp.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Burkholderia
/
Péptidos Catiónicos Antimicrobianos
/
Proteínas Mutantes
Límite:
Humans
Idioma:
En
Revista:
Int J Antimicrob Agents
Año:
2010
Tipo del documento:
Article
País de afiliación:
Tailandia