Marine Natural Products with Anti-biofilm and Anti-virulence Activity

A special issue of Marine Drugs (ISSN 1660-3397).

Deadline for manuscript submissions: closed (25 June 2021) | Viewed by 10987

Special Issue Editors


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Guest Editor
Department of Food Science and Technology, Pukyong National University, Busan, Republic of Korea
Interests: antibiofilm drugs; antivirulence drugs; secondary metabolites; microbial pathogenesis; synthesis of nanocomposites; natural antimicrobial products
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Guest Editor
Ocean and Fisheries Development International Cooperation Institute, Pukyong National University, Busan, Republic of Korea
Interests: probiotics; bacteria; food biochemistry; biofilm; natural and synthetic compound; antimicrobial; antibiofilm; nanomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A high incidence of antimicrobial resistance in pathogenic microorganisms causing a major threat to human survival has been emerging over the last few decades. The major reason for this resistance was found to be the formation of biofilms by these pathogenic microbes, although they display multiple resistance mechanisms. Biofilms are a self-assemblage of the bacterial population encased by a self-produced extracellular polymeric substances such as exopolysaccharides, eDNA, and extracellular proteins. These pathogenic microorganisms also produce several toxins and virulence factors that contribute towards pathogenesis. In response to combating the infections caused by these microbes, several recent and past studies have developed alternative strategies. These strategies include the application of biologically derived or chemically synthesized active compounds as antibiofilm and antivirulence agents. Furthermore, these compounds have also been employed in different formulations, such as through conjugation, immobilization, or their encapsulation in polymeric biocompatible materials. Considering the continuous emergence of new antibiotic-resistant microbial strains, there is a high demand to screen antibiofilm and antivirulence drugs. The antibiofilm drugs derived from marine organisms are considered as potential drugs due to their negligible cytotoxicity and high biocompatibility properties. In addition, marine-derived polymeric substances, including fucoidan, carrageenan, alginate, and chitosan, have also been exploited as a carrier for the pre-existing antibiofilm or antivirulence drugs whose instability and hydrophobicity have precluded their successful delivery.

As Guest Editors for this Special Issue, we invite all researchers to submit their findings related to antibiofilm and antivirulence drugs derived from marine organisms for the upcoming Special Issue “Marine Natural Products with Antibiofilm and Antivirulence Activity”.

Prof. Dr. Young-mog Kim
Dr. Fazlurrahman Khan
Guest Editors

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. Marine Drugs 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

  • antibiofilm
  • antivirulence
  • bioactive molecules
  • conjugation
  • drug delivery
  • drug discovery
  • encapsulation
  • marine products
  • marine organisms
  • nanocomposites
  • pathogens
  • secondary metabolites

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Related Special Issue

Published Papers (3 papers)

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Research

24 pages, 8615 KiB  
Article
Phloroglucinol-Gold and -Zinc Oxide Nanoparticles: Antibiofilm and Antivirulence Activities towards Pseudomonas aeruginosa PAO1
by Fazlurrahman Khan, Min-Gyun Kang, Du-Min Jo, Pathum Chandika, Won-Kyo Jung, Hyun Wook Kang and Young-Mog Kim
Mar. Drugs 2021, 19(11), 601; https://doi.org/10.3390/md19110601 - 22 Oct 2021
Cited by 32 | Viewed by 3730
Abstract
With the advancement of nanotechnology, several nanoparticles have been synthesized as antimicrobial agents by utilizing biologically derived materials. In most cases, the materials used for the synthesis of nanoparticles from natural sources are extracts. Natural extracts contain a wide range of bioactive components, [...] Read more.
With the advancement of nanotechnology, several nanoparticles have been synthesized as antimicrobial agents by utilizing biologically derived materials. In most cases, the materials used for the synthesis of nanoparticles from natural sources are extracts. Natural extracts contain a wide range of bioactive components, making it difficult to pinpoint the exact component responsible for nanoparticle synthesis. Furthermore, the bioactive component present in the extract changes according to numerous environmental factors. As a result, the current work intended to synthesize gold (AuNPs) and zinc oxide (ZnONPs) nanoparticles using pure phloroglucinol (PG). The synthesized PG-AuNPs and PG-ZnONPs were characterized using a UV–Vis absorption spectrophotometer, FTIR, DLS, FE-TEM, zeta potential, EDS, and energy-dispersive X-ray diffraction. The characterized PG-AuNPs and PG-ZnONPs have been employed to combat the pathogenesis of Pseudomonas aeruginosa. P. aeruginosa is recognized as one of the most prevalent pathogens responsible for the common cause of nosocomial infection in humans. Antimicrobial resistance in P. aeruginosa has been linked to the development of recalcitrant phenotypic characteristics, such as biofilm, which has been identified as one of the major obstacles to antimicrobial therapy. Furthermore, P. aeruginosa generates various virulence factors that are a major cause of chronic infection. These PG-AuNPs and PG-ZnONPs significantly inhibit early stage biofilm and eradicate mature biofilm. Furthermore, these NPs reduce P. aeruginosa virulence factors such as pyoverdine, pyocyanin, protease, rhamnolipid, and hemolytic capabilities. In addition, these NPs significantly reduce P. aeruginosa swarming, swimming, and twitching motility. PG-AuNPs and PG-ZnONPs can be used as control agents for infections caused by the biofilm-forming human pathogenic bacterium P. aeruginosa. Full article
(This article belongs to the Special Issue Marine Natural Products with Anti-biofilm and Anti-virulence Activity)
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9 pages, 2838 KiB  
Article
Antibiofilm Activity of Phorbaketals from the Marine Sponge Phorbas sp. against Staphylococcus aureus
by Yong-Guy Kim, Jin-Hyung Lee, Sangbum Lee, Young-Kyung Lee, Buyng Su Hwang and Jintae Lee
Mar. Drugs 2021, 19(6), 301; https://doi.org/10.3390/md19060301 - 24 May 2021
Cited by 9 | Viewed by 2461
Abstract
Biofilm formation by Staphylococcus aureus plays a critical role in the persistence of chronic infections due to its tolerance against antimicrobial agents. Here, we investigated the antibiofilm efficacy of six phorbaketals: phorbaketal A (1), phorbaketal A acetate (2), phorbaketal [...] Read more.
Biofilm formation by Staphylococcus aureus plays a critical role in the persistence of chronic infections due to its tolerance against antimicrobial agents. Here, we investigated the antibiofilm efficacy of six phorbaketals: phorbaketal A (1), phorbaketal A acetate (2), phorbaketal B (3), phorbaketal B acetate (4), phorbaketal C (5), and phorbaketal C acetate (6), isolated from the Korean marine sponge Phorbas sp. Of these six compounds, 3 and 5 were found to be effective inhibitors of biofilm formation by two S. aureus strains, which included a methicillin-resistant S. aureus. In addition, 3 also inhibited the production of staphyloxanthin, which protects microbes from reactive oxygen species generated by neutrophils and macrophages. Transcriptional analyses showed that 3 and 5 inhibited the expression of the biofilm-related hemolysin gene hla and the nuclease gene nuc1. Full article
(This article belongs to the Special Issue Marine Natural Products with Anti-biofilm and Anti-virulence Activity)
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9 pages, 846 KiB  
Article
Inhibition of Biofilm Formation by Modified Oxylipins from the Shipworm Symbiont Teredinibacter turnerae
by Noel M. Lacerna II, Cydee Marie V. Ramones, Jose Miguel D. Robes, Myra Ruth D. Picart, Jortan O. Tun, Bailey W. Miller, Margo G. Haygood, Eric W. Schmidt, Lilibeth A. Salvador-Reyes and Gisela P. Concepcion
Mar. Drugs 2020, 18(12), 656; https://doi.org/10.3390/md18120656 - 20 Dec 2020
Cited by 7 | Viewed by 3844
Abstract
The bioactivity-guided purification of the culture broth of the shipworm endosymbiont Teredinibacter turnerae strain 991H.S.0a.06 yielded a new fatty acid, turneroic acid (1), and two previously described oxylipins (23). Turneroic acid (1) is an 18-carbon [...] Read more.
The bioactivity-guided purification of the culture broth of the shipworm endosymbiont Teredinibacter turnerae strain 991H.S.0a.06 yielded a new fatty acid, turneroic acid (1), and two previously described oxylipins (23). Turneroic acid (1) is an 18-carbon fatty acid decorated by a hydroxy group and an epoxide ring. Compounds 13 inhibited bacterial biofilm formation in Staphylococcus epidermidis, while only 3 showed antimicrobial activity against planktonic S. epidermidis. Comparison of the bioactivity of 13 with structurally related compounds indicated the importance of the epoxide moiety for selective and potent biofilm inhibition. Full article
(This article belongs to the Special Issue Marine Natural Products with Anti-biofilm and Anti-virulence Activity)
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