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Related Concept Videos

Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

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The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
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Zygomycota, previously classified as a distinct fungal group, are primarily terrestrial, saprophytic molds that play a crucial role as decomposers. Recent phylogenetic studies have revealed that these fungi are now divided into two major clades — Mucoromycota, which includes many symbiotic species, and Zoopagomycota, which primarily consists of parasitic and pathogenic fungi. These groups exhibit distinct ecological roles and reproductive strategies while sharing key structural and...
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Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
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New Generation Modified Azole Antifungals against Multidrug-Resistant Candida auris.

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  • 1Institute of Pharmaceutical Science, King's College London, 150 Stamford Street, London SE1 9NH, United Kingdom.

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New azole-based compounds show potent activity against drug-resistant Candida auris and other fungi. These novel antifungals are effective against resistant strains and demonstrate low toxicity in vivo, offering hope for new treatments.

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Area of Science:

  • Medicinal Chemistry
  • Antimicrobial Resistance
  • Mycology

Background:

  • Antifungal resistance and limited treatment options necessitate the development of new drug classes.
  • Candida auris poses a significant global health threat due to its limited therapeutic options.

Purpose of the Study:

  • To develop novel azole-based compounds with potent antifungal activity.
  • To evaluate the efficacy of these compounds against multidrug-resistant fungal pathogens, including Candida auris.

Main Methods:

  • Synthesis of novel azole-based compounds featuring cyclic heteroaliphatic linkers.
  • Antifungal susceptibility testing (MIC determination) against various Candida species, including azole-resistant strains.
  • In vitro assays for CYP51 inhibition, biofilm eradication, and intracellular accumulation.
  • In vivo efficacy and toxicity studies in Galleria mellonella and Drosophila melanogaster models.

Main Results:

  • Several novel azole compounds exhibited potent activity against Candida auris (MICs 0.016–4 μg/mL), including azole-resistant strains.
  • Compounds demonstrated broad-spectrum activity against other Candida species (MICs < 1 μg/mL).
  • Compounds 7, 18, and 21 outperformed fluconazole; compound 7 inhibited CYP51, eradicated biofilms, and showed enhanced intracellular accumulation.
  • In vivo studies showed efficacy at 5 mg/kg with no observed toxicity up to 50 mg/kg.

Conclusions:

  • Novel azole-based compounds are effective against multidrug-resistant Candida auris and other pathogenic fungi.
  • Compound 7 exhibits promising characteristics, including CYP51 inhibition and biofilm eradication.
  • The developed scaffold warrants further investigation for treating serious fungal infections.