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Current Pharmaceutical Design

Editor-in-Chief

ISSN (Print): 1381-6128
ISSN (Online): 1873-4286

General Research Article

Functional Characterization of a Novel Hybrid Peptide with High Potency against Gram-negative Bacteria

Author(s): Yara Al Tall*, Baha’a Al-Rawashdeh, Ahmad Abualhaijaa, Ammar Almaaytah, Majed Masadeh and Karem H. Alzoubi

Volume 26 , Issue 3 , 2020

Page: [376 - 385] Pages: 10

DOI: 10.2174/1381612826666200128090700

Price: $65

Abstract

Background: Multi-drug resistant infections are a growing worldwide health concern. There is an urgent need to produce alternative antimicrobial agents.

Objective: The study aimed to design a new hybrid antimicrobial peptide, and to evaluate its antimicrobial activity alone and in combination with traditional antibiotics.

Methods: Herein, we designed a novel hybrid peptide (BMR-1) using the primary sequences of the parent peptides Frog Esculentin-1a and Monkey Rhesus cathelicidin (RL-37). The positive net charge was increased, and other physicochemical parameters were optimized. The antimicrobial activities of BMR-1 were tested against control and multi-drug resistant gram-negative bacteria.

Results: BMR-1 adopted a bactericidal behavior with MIC values of 25-30 µM. These values reduced by over 75% upon combination with conventional antibiotics (levofloxacin, chloramphenicol, ampicillin, and rifampicin). The combination showed strong synergistic activities in most cases and particularly against multi-drug resistance P. aeruginosa and E. coli. BMR-1 showed similar potency against all tested strains regardless of their resistant mechanisms. BMR-1 exhibited no hemolytic effect on human red blood cells with the effective MIC values against the tested strains.

Conclusion: BMR-1 hybrid peptide is a promising candidate to treat resistant infectious diseases caused by gramnegative bacteria.

Keywords: Antimicrobial peptides, hybridization, resistance, antibiotic adjuvant, synergism, BMR-1.

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