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| Pàgina inicial > Articles > Articles publicats > In Vivo Evaluation of ECP Peptide Analogues for the Treatment of Acinetobacter baumannii Infection |
| Data: | 2022 |
| Resum: | Antimicrobial peptides (AMPs) are alternative therapeutics to traditional antibiotics against bacterial resistance. Our previous work identified an antimicrobial region at the N-terminus of the eosinophil cationic protein (ECP). Following structure-based analysis, a 30mer peptide (ECPep-L) was designed that combines antimicrobial action against Gram-negative species with lipopolysaccharides (LPS) binding and endotoxin-neutralization activities. Next, analogues that contain non-natural amino acids were designed to increase serum stability. Here, two analogues were selected for in vivo assays: the all-D version (ECPep-D) and the Arg to Orn version that incorporates a D-amino acid at position 2 (ECPep-2D-Orn). The peptide analogues retained high LPS-binding and anti-endotoxin activities. The peptides efficacy was tested in a murine acute infection model of Acinetobacter baumannii. Results highlighted a survival rate above 70% following a 3-day supervision with a single administration of ECPep-D. Moreover, in both ECPep-D and ECPep-2D-Orn peptide-treated groups, clinical symptoms improved significantly and the tissue infection was reduced to equivalent levels to mice treated with colistin, used as a last resort in the clinics. Moreover, treatment drastically reduced serum levels of TNF-α inflammation marker within the first 8 h. The present results support ECP-derived peptides as alternative candidates for the treatment of acute infections caused by Gram-negative bacteria. |
| Ajuts: | Fundació la Marató de TV3 201803-10 Agencia Estatal de Investigación PID2019-106123GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2016PROD00060 Agència de Gestió d'Ajuts Universitaris i de Recerca 2019LLAV00002 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | ECP ; AMPs ; Infection ; Murine model ; Gram-negative bacteria ; LPS |
| Publicat a: | Biomedicines, Vol. 10 Núm. 2 (february 2022) , p. 386, ISSN 2227-9059 |
20 p, 14.1 MB |