Mechanisms of Antimicrobial Peptides on Pathogens, 2nd Edition

A special issue of Antibiotics (ISSN 2079-6382). This special issue belongs to the section "Antimicrobial Peptides".

Deadline for manuscript submissions: 31 October 2024 | Viewed by 1597

Special Issue Editor


E-Mail
Guest Editor
Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Gdansk, Poland
Interests: antimicrobial peptides; peptide synthesis; peptide drug formulation;combination antibiotic therapy; bacterial biofilm; microbial resistance
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Antimicrobial peptides (AMPs) are considered to be a promising alternative for conventional antimicrobials. They are widely distributed in nature as developmental components of the innate immunity of living organisms. The majority of AMPs are cationic, amphipathic molecules that exhibit a strong activity against a broad spectrum of pathogens, including multi-drug resistant strains. Their ability to eliminate and prevent biofilm structures has been proven in in vitro and in vivo studies.

The most common mode of action of AMPs is the disruption of cell membranes, which leads to microbial lysis. Due to their unique mechanisms of action based on interactions with the microbial cell membrane, AMPs can act on slow-growing or even non-growing bacteria and are active against biofilms. This mode also has a lower risk of acquired resistance or cross-resistance with other agents compared to other modes of action, which makes it an attractive template for the design of new antimicrobials for specific applications. Several mechanisms of membrane perturbation are discussed on a molecular level (e.g., toroidal pore formation, the carpet model, void formation, clustering of lipids, and membrane curvature). However, as of now, numerous AMPs with non-conventional modes of action have also been described. The determination and understanding of the modes of action of AMPs are crucial for the rational design of improved antimicrobial compounds.

 The aim of this Special Issue is to extend the scientific knowledge of AMPs in order to examine their modes of action, understand possible mechanisms of microbial resistance, explore potential clinical applications, and present the latest achievements in this field of research.

Dr. Malgorzata Paduszynska
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Antibiotics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Antimicrobial peptides
  • mechanisms of antimicrobial activities
  • interactions with bacterial membrane
  • microbial resistance
  • inhibition of biofilm formation
  • biofilm eradication

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

16 pages, 20026 KiB  
Article
Lipid Microenvironment Modulates the Pore-Forming Ability of Polymyxin B
by Anastasiia A. Zakharova, Svetlana S. Efimova and Olga S. Ostroumova
Antibiotics 2022, 11(10), 1445; https://doi.org/10.3390/antibiotics11101445 - 20 Oct 2022
Cited by 3 | Viewed by 1310
Abstract
The ability of polymyxin B, an antibiotic used to treat infections caused by multidrug-resistant Gram-negative bacteria as a last-line therapeutic option, to form ion pores in model membranes composed of various phospholipids and lipopolysaccharides was studied. Our data demonstrate that polymyxin B predominantly [...] Read more.
The ability of polymyxin B, an antibiotic used to treat infections caused by multidrug-resistant Gram-negative bacteria as a last-line therapeutic option, to form ion pores in model membranes composed of various phospholipids and lipopolysaccharides was studied. Our data demonstrate that polymyxin B predominantly interacts with negatively charged lipids. Susceptibility decreases as follows: Kdo2-Lipid A >> DOPG ≈ DOPS >> DPhPG ≈ TOCL ≈ Lipid A. The dimer and hexamer of polymyxin B are involved in the pore formation in DOPG(DOPS)- and Kdo2-Lipid A-enriched bilayers, respectively. The pore-forming ability of polymyxin B significantly depends on the shape of membrane lipids, which indicates that the antibiotic produces toroidal lipopeptide-lipid pores. Small amphiphilic molecules diminishing the membrane dipole potential and inducing positive curvature stress were shown to be agonists of pore formation by polymyxin B and might be used to develop innovative lipopeptide-based formulations. Full article
(This article belongs to the Special Issue Mechanisms of Antimicrobial Peptides on Pathogens, 2nd Edition)
Show Figures

Figure 1

Back to TopTop