Addressing the Challenge of Antibiotic Resistance with Existing Antibiotics

A special issue of Antibiotics (ISSN 2079-6382). This special issue belongs to the section "Mechanism and Evolution of Antibiotic Resistance".

Deadline for manuscript submissions: 5 October 2025 | Viewed by 991

Special Issue Editor


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Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, China
Interests: metabolic reprogramming; metabolic mechanisms; metabolic reversing
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Special Issue Information

Dear Colleagues,

Antibiotic resistance poses a big challenge to human health and animal feeding. Since the pipeline of new antibiotic discoveries is becoming more limited, restoring and increasing existing antibacterials that are already subject to resistance is an alternative approach.

The Special Issue aims to highlight the use of a range of effective strategies for synergizing antibacterial agents with drugs or adjuvants against antibiotic-resistant pathogens. It includes, but is not limited to, the following research:

  1. Clinical epidemiology and characteristic analysis of antibiotic-resistant bacteria.
  2. The synergistic effect of antibacterial agents and metabolites against antibiotic-resistant bacteria.
  3. The synergistic effect of antibacterial agents and chemicals against antibiotic-resistant bacteria.
  4. The synergistic effect of antibacterial agents and other antibacterial agents against antibiotic-resistant bacteria.
  5. The synergistic effect of antibacterial agents and non-antibacterial agents against antibiotic-resistant bacteria.

Prof. Dr. Xuanxian Peng
Guest Editor

Manuscript Submission Information

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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

  • antibiotic resistance
  • antibacterial agents
  • metabolites
  • antibiotic-resistant bacteria

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Published Papers (1 paper)

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Research

17 pages, 5365 KiB  
Article
What Is the Impact of Antibiotic Resistance Determinants on the Bacterial Death Rate?
by Bruno T. S. Luz, João S. Rebelo, Francisca Monteiro and Francisco Dionisio
Antibiotics 2025, 14(2), 201; https://doi.org/10.3390/antibiotics14020201 - 14 Feb 2025
Viewed by 674
Abstract
Objectives: Antibiotic-resistant bacteria are widespread, with resistance arising from chromosomal mutations and resistance genes located in the chromosome or in mobile genetic elements. While resistance determinants often reduce bacterial growth rates, their influence on bacterial death under bactericidal antibiotics remains poorly understood. When [...] Read more.
Objectives: Antibiotic-resistant bacteria are widespread, with resistance arising from chromosomal mutations and resistance genes located in the chromosome or in mobile genetic elements. While resistance determinants often reduce bacterial growth rates, their influence on bacterial death under bactericidal antibiotics remains poorly understood. When bacteria are exposed to bactericidal antibiotics to which they are susceptible, they typically undergo a two-phase decline: a fast initial exponentially decaying phase, followed by a persistent slow-decaying phase. This study examined how resistance determinants affect death rates during both phases. Methods: We analyzed the death rates of ampicillin-exposed Escherichia coli populations of strains sensitive to ampicillin but resistant to nalidixic acid, rifampicin, or both, and bacteria carrying the conjugative plasmids RN3 or R702. Results: Single mutants resistant to nalidixic acid or rifampicin decayed faster than sensitive cells during the early phase, whereas the double-resistant mutant exhibited prolonged survival. These contrasting impacts suggest epistatic interactions between both chromosomal mutations. Persistent-phase death rates for chromosomal mutants did not differ significantly from wild-type cells. In contrast, plasmid-carrying bacteria displayed distinct dynamics: R702 plasmid-bearing cells showed higher persistent-phase death rates than plasmid-free cells, while RN3 plasmid-bearing cells exhibited lower rates. Conclusions: Bactericidal antibiotics may kill bacteria resistant to other antibiotics more effectively than wild-type cells. Moreover, epistasis may occur when different resistance determinants occur in the same cell, impacting the bactericidal potential of the antibiotic of choice. These results have significant implications for optimizing bacterial eradication protocols in clinical settings, as well as in animal health and industrial food safety management. Full article
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