Chimeric Peptides Derived from Bovine Lactoferricin and Buforin II: Antifungal Activity Against Reference Strains and Clinical Isolates of Spp

Overview

Journal Antibiotics (Basel)

Specialty Pharmacology

Date 2022 Nov 11

PMID 36358216

Authors

Katherine Aguirre-Guataqui

Mateo Marquez-Torres

Hector Manuel Pineda-Castaneda

Yerly Vargas-Casanova

Andres Ceballos-Garzon

Zuly Jenny Rivera-Monroy

Javier Eduardo Garcia-Castaneda

Claudia Marcela Parra-Giraldo

Affiliations

Soon will be listed here.

Abstract

Antimicrobial peptides (AMPs) are considered to be a valuable source for the identification and/or design of promising candidates for the development of antifungal treatments, since they have advantages such as lower tendency to induce resistance, ease of production, and high purity and safety. Bovine lactoferricin (LfcinB) and buforin II (BFII) are AMPs to which great antimicrobial potential has been attributed. The minimum motives with antimicrobial activity derived from LfcinB and BFII are RRWQWR and RLLR, respectively. Nine chimeras containing the minimum motives of both peptides were synthesized and their antifungal activity against fluconazole (FLC)-sensitive and resistant , , and strains was evaluated. The results showed that peptides C9: (RRWQWR)K-Ahx-RLLRRRLLR and C6: KKWQWK-Ahx-RLLRRLLR exhibited the greatest antifungal activity against two strains of , a FLC-sensitive reference strain and a FLC-resistant clinical isolate; no medically significant results were observed with the other chimeras evaluated (MIC ~200 µg/mL). The chimera C6 was also active against sensitive and resistant strains of and . The combination of branched polyvalent chimeras together with FLC showed a synergistic effect against In addition to exhibiting antifungal activity against reference strains and clinical isolates of spp., they also showed antibacterial activity against both Gram-positive and Gram-negative bacteria, suggesting that these chimeras exhibit a broad antimicrobial spectrum and can be considered to be promising molecules for therapeutic applications.

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