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      The need for smart bimetallic nanoparticles in the battle against pathogenic multi-drug resistant bacteria: a brief communication

      Discover Bacteria
      Springer Science and Business Media LLC

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          Abstract

          The expanding threat presented by developing pathogenic multidrug-resistant (MDR) bacteria calls for an urgent need for research, particularly given the growing concern for global public health. Bimetallic nanoparticles (NPs) have the potential to be utilized for a broad variety of pharmacological and biological applications because to their outstanding antibacterial activity at low concentrations and continuous phase stability. This is especially true when it comes to preventing MDR pathogenic bacteria from invading. Several biological synthetic methods for producing bimetallic NPs and the range of analytical methods (used to characterize them) are covered in this brief communication paper. Additionally, I tried to highlight the literature review on the antimicrobial capabilities of several synthesized bimetallic NPs. The final section of this brief communication discussed the structure and mechanism of action of the synthesized bimetallic NPs against pathogenic bacteria. Electrostatic interaction, damage to cell membranes, change of enzymes and proteins, oxidative stress and the production of reactive oxygen species (ROS), binding to proteins that disturbs the electron transport chain and disturbs homeostasis, signal transduction suppression, and genotoxicity are some possible associations with the phenomenon being studied.

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          Investigation into the antibacterial behaviour of suspensions of ZnO nanoparticles (ZnO nanofluids)

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            Therapeutic efficacy of nanoparticles and routes of administration

            In modern-day medicine, nanotechnology and nanoparticles are some of the indispensable tools in disease monitoring and therapy. The term “nanomaterials” describes materials with nanoscale dimensions (< 100 nm) and are broadly classified into natural and synthetic nanomaterials. However, “engineered” nanomaterials have received significant attention due to their versatility. Although enormous strides have been made in research and development in the field of nanotechnology, it is often confusing for beginners to make an informed choice regarding the nanocarrier system and its potential applications. Hence, in this review, we have endeavored to briefly explain the most commonly used nanomaterials, their core properties and how surface functionalization would facilitate competent delivery of drugs or therapeutic molecules. Similarly, the suitability of carbon-based nanomaterials like CNT and QD has been discussed for targeted drug delivery and siRNA therapy. One of the biggest challenges in the formulation of drug delivery systems is fulfilling targeted/specific drug delivery, controlling drug release and preventing opsonization. Thus, a different mechanism of drug targeting, the role of suitable drug-laden nanocarrier fabrication and methods to augment drug solubility and bioavailability are discussed. Additionally, different routes of nanocarrier administration are discussed to provide greater understanding of the biological and other barriers and their impact on drug transport. The overall aim of this article is to facilitate straightforward perception of nanocarrier design, routes of various nanoparticle administration and the challenges associated with each drug delivery method.
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              Nano-Strategies to Fight Multidrug Resistant Bacteria—“A Battle of the Titans”

              Infectious diseases remain one of the leading causes of morbidity and mortality worldwide. The WHO and CDC have expressed serious concern regarding the continued increase in the development of multidrug resistance among bacteria. Therefore, the antibiotic resistance crisis is one of the most pressing issues in global public health. Associated with the rise in antibiotic resistance is the lack of new antimicrobials. This has triggered initiatives worldwide to develop novel and more effective antimicrobial compounds as well as to develop novel delivery and targeting strategies. Bacteria have developed many ways by which they become resistant to antimicrobials. Among those are enzyme inactivation, decreased cell permeability, target protection, target overproduction, altered target site/enzyme, increased efflux due to over-expression of efflux pumps, among others. Other more complex phenotypes, such as biofilm formation and quorum sensing do not appear as a result of the exposure of bacteria to antibiotics although, it is known that biofilm formation can be induced by antibiotics. These phenotypes are related to tolerance to antibiotics in bacteria. Different strategies, such as the use of nanostructured materials, are being developed to overcome these and other types of resistance. Nanostructured materials can be used to convey antimicrobials, to assist in the delivery of novel drugs or ultimately, possess antimicrobial activity by themselves. Additionally, nanoparticles (e.g., metallic, organic, carbon nanotubes, etc.) may circumvent drug resistance mechanisms in bacteria and, associated with their antimicrobial potential, inhibit biofilm formation or other important processes. Other strategies, including the combined use of plant-based antimicrobials and nanoparticles to overcome toxicity issues, are also being investigated. Coupling nanoparticles and natural-based antimicrobials (or other repurposed compounds) to inhibit the activity of bacterial efflux pumps; formation of biofilms; interference of quorum sensing; and possibly plasmid curing, are just some of the strategies to combat multidrug resistant bacteria. However, the use of nanoparticles still presents a challenge to therapy and much more research is needed in order to overcome this. In this review, we will summarize the current research on nanoparticles and other nanomaterials and how these are or can be applied in the future to fight multidrug resistant bacteria.
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                Author and article information

                Journal
                Discover Bacteria
                Discov Bact
                Springer Science and Business Media LLC
                3004-9768
                December 2024
                August 13 2024
                : 1
                : 1
                Article
                10.1007/s44351-024-00002-6
                632f8a58-6c7a-4bb7-8ea6-9664e54aea4a
                © 2024

                https://creativecommons.org/licenses/by/4.0

                https://creativecommons.org/licenses/by/4.0

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