The number of antibiotic-resistant microbial infections is dramatically increasing, while the discovery of new antibiotics is significantly declining. Furthermore, the activity of antibiotics is negatively influenced by the ability of bacteria to form sessile communities, called biofilms, and by the microenvironment of the infection, characterized by an acidic pH, especially in the lungs of patients suffering from cystic fibrosis (CF). Antimicrobial peptides represent interesting alternatives to conventional antibiotics, and with expanding properties. Here, we explored the effects of an acidic pH on the antimicrobial and antibiofilm activities of the AMP Esc(1-21) and we found that it slightly lost activity (from 2- to 4-fold) against the planktonic form of a panel of Gram-negative bacteria, with respect to a ≥ 32-fold of traditional antibiotics. Furthermore, it retained its activity against the sessile form of these bacteria grown in media with a neutral pH, and showed similar or higher effectiveness against the biofilm form of bacteria grown in acidic media, simulating a CF-like acidic microenvironment, compared to physiological conditions.

The pH-Insensitive antimicrobial and atibiofilm activities of the frog skin derived peptide Esc(1-21): promising features for novel anti-infective drugs / Loffredo, Maria Rosa; Cappiello, Floriana; Cappella, Giacomo; Capuozzo, Elisabetta; Torrini, Luisa; Diaco, Fabiana; Di, Yuanpu Peter; Mangoni, Maria Luisa; Casciaro, Bruno. - In: ANTIBIOTICS. - ISSN 2079-6382. - 13:8(2024), pp. 1-15. [10.3390/antibiotics13080701]

The pH-Insensitive antimicrobial and atibiofilm activities of the frog skin derived peptide Esc(1-21): promising features for novel anti-infective drugs

Loffredo, Maria Rosa;Cappiello, Floriana;Cappella, Giacomo;Capuozzo, Elisabetta;Torrini, Luisa;Diaco, Fabiana;Mangoni, Maria Luisa
;
Casciaro, Bruno
2024

Abstract

The number of antibiotic-resistant microbial infections is dramatically increasing, while the discovery of new antibiotics is significantly declining. Furthermore, the activity of antibiotics is negatively influenced by the ability of bacteria to form sessile communities, called biofilms, and by the microenvironment of the infection, characterized by an acidic pH, especially in the lungs of patients suffering from cystic fibrosis (CF). Antimicrobial peptides represent interesting alternatives to conventional antibiotics, and with expanding properties. Here, we explored the effects of an acidic pH on the antimicrobial and antibiofilm activities of the AMP Esc(1-21) and we found that it slightly lost activity (from 2- to 4-fold) against the planktonic form of a panel of Gram-negative bacteria, with respect to a ≥ 32-fold of traditional antibiotics. Furthermore, it retained its activity against the sessile form of these bacteria grown in media with a neutral pH, and showed similar or higher effectiveness against the biofilm form of bacteria grown in acidic media, simulating a CF-like acidic microenvironment, compared to physiological conditions.
2024
Gram-negative bacteria; acidic pH; antibiotics; antimicrobial peptides; biofilm; cystic fibrosis; infections
01 Pubblicazione su rivista::01a Articolo in rivista
The pH-Insensitive antimicrobial and atibiofilm activities of the frog skin derived peptide Esc(1-21): promising features for novel anti-infective drugs / Loffredo, Maria Rosa; Cappiello, Floriana; Cappella, Giacomo; Capuozzo, Elisabetta; Torrini, Luisa; Diaco, Fabiana; Di, Yuanpu Peter; Mangoni, Maria Luisa; Casciaro, Bruno. - In: ANTIBIOTICS. - ISSN 2079-6382. - 13:8(2024), pp. 1-15. [10.3390/antibiotics13080701]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1718351
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