NANO versus BIO: Nanophysical Bactericidal Methods in Microbiology and Their Prospective Applications

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Microbial Biotechnology".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 3498

Special Issue Editors


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Guest Editor

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Guest Editor
N.F. Gamaleya Federal Research Institute of Epidemiology and Microbiology, Moscow, Russia
Interests: biofilms; antifouling; nanomaterials; bactericidal greases

Special Issue Information

Dear Colleagues,

Pathogenic bacteria and viruses appear to build into our environment, making our resistance to their expansion and occupation a crucial “to be or not to be” question (life or death). Fortunately, to date, we are able to put our smart biotechnological achievements against the blind probabilistic play of bacterial reproduction, permanently overcoming our control via genetically acquired resistance. This way, advances and breakthroughs in the invention of novel bactericidal nanomaterials, biophotonic procedures, or their combined action keep a favorable balance in the everlasting struggle.

This Special issue is focused on delivering a state-of-art collection of review and featured research papers on advanced nanophysical and biophotonic modalities in their synergistic counterfeiting antibiotic-resistant pathogenic bacteria, self-organized into biofilms on critical surfaces in biomedicine, cosmetology, the food industry, etc.

Prof. Dr. Sergey Kudryashov
Dr. Eteri Tolordava
Guest Editors

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Keywords

  • biofilms
  • antifouling
  • antibacterial nanomaterials
  • laser nanoplaster
  • biophotonics
  • “smart light” and “smart heat”
  • bactericidal greases

Published Papers (2 papers)

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Research

19 pages, 3927 KiB  
Article
Hydrogel-Containing Biogenic Silver Nanoparticles: Antibacterial Action, Evaluation of Wound Healing, and Bioaccumulation in Wistar Rats
by Sara Scandorieiro, Angela Hitomi Kimura, Larissa Ciappina de Camargo, Marcelly Chue Gonçalves, João Vinícius Honório da Silva, Wagner Ezequiel Risso, Fábio Goulart de Andrade, Cássia Thaïs Bussamra Vieira Zaia, Audrey Alesandra Stinghen Garcia Lonni, Claudia Bueno dos Reis Martinez, Nelson Durán, Gerson Nakazato and Renata Katsuko Takayama Kobayashi
Microorganisms 2023, 11(7), 1815; https://doi.org/10.3390/microorganisms11071815 - 15 Jul 2023
Cited by 1 | Viewed by 1119
Abstract
Wound infections are feared complications due to their potential to increase healthcare costs and cause mortality since multidrug-resistant bacteria reduce treatment options. This study reports the development of a carbomer hydrogel containing biogenic silver nanoparticles (bioAgNPs) and its effectiveness in wound treatment. This [...] Read more.
Wound infections are feared complications due to their potential to increase healthcare costs and cause mortality since multidrug-resistant bacteria reduce treatment options. This study reports the development of a carbomer hydrogel containing biogenic silver nanoparticles (bioAgNPs) and its effectiveness in wound treatment. This hydrogel showed in vitro bactericidal activity after 2 h, according to the time–kill assay. It also reduced bacterial contamination in rat wounds without impairing their healing since the hydrogel hydrophilic groups provided hydration for the injured skin. The high number of inflammatory cells in the first days of the skin lesion and the greater degree of neovascularization one week after wound onset showed that the healing process occurred normally. Furthermore, the hydrogel-containing bioAgNPs did not cause toxic silver accumulation in the organs and blood of the rats. This study developed a bioAgNP hydrogel for the treatment of wounds; it has a potent antimicrobial action without interfering with cicatrization or causing silver bioaccumulation. This formulation is effective against bacteria that commonly cause wound infections, such as Pseudomonas aeruginosa and Staphylococcus aureus, and for which new antimicrobials are urgently needed, according to the World Health Organization’s warning. Full article
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13 pages, 1935 KiB  
Article
Eugenia uniflora L. Silver and Gold Nanoparticle Synthesis, Characterization, and Evaluation of the Photoreduction Process in Antimicrobial Activities
by Marcia Regina Franzolin, Daniella dos Santos Courrol, Susana de Souza Barreto and Lilia Coronato Courrol
Microorganisms 2022, 10(5), 999; https://doi.org/10.3390/microorganisms10050999 - 10 May 2022
Cited by 9 | Viewed by 1796
Abstract
Eugenia uniflora linnaeus, known as Brazilian cherry, is widely distributed in Brazil, Argentina, Uruguay, and Paraguay. E. uniflora L. extracts contain phenolic compounds, such as flavonoids, tannins, triterpenes, and sesquiterpenes. The antimicrobial action of essential oils has been attributed to their compositions [...] Read more.
Eugenia uniflora linnaeus, known as Brazilian cherry, is widely distributed in Brazil, Argentina, Uruguay, and Paraguay. E. uniflora L. extracts contain phenolic compounds, such as flavonoids, tannins, triterpenes, and sesquiterpenes. The antimicrobial action of essential oils has been attributed to their compositions of bioactive compounds, such as sesquiterpenes. In this paper, the fruit extract of E. uniflora was used to synthesize silver and gold nanoparticles. The nanoparticles were characterized by UV–Vis, transmission electron microscopy, elemental analysis, FTIR, and Zeta potential measurement. The silver and gold nanoparticles prepared with fruit extracts presented sizes of ~32 nm and 11 nm (diameter), respectively, and Zeta potentials of −22 mV and −14 mV. The antimicrobial tests were performed with Gram-negative and Gram-positive bacteria and Candida albicans. The growth inhibition of EuAgNPs prepared with and without photoreduction showed the important functional groups in the antimicrobial activity. Full article
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