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Related Concept Videos

Production of Antibiotics01:27

Production of Antibiotics

Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
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CAPRRESI: Chimera Assembly by Plasmid Recovery and Restriction Enzyme Site Insertion
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Published on: June 25, 2017

Structure aided design of chimeric antibiotics.

Tomislav Karoli1, Sreeman K Mamidyala, Johannes Zuegg

  • 1Institute for Molecular Bioscience, University of Queensland, St Lucia, Queensland 4072, Australia.

Bioorganic & Medicinal Chemistry Letters
|March 13, 2012
PubMed
Summary

New chimeric drugs combine trimethoprim and ciprofloxacin to combat antibiotic resistance. These novel molecules show broad-spectrum activity against resistant bacteria without cytotoxicity.

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Area of Science:

  • Medicinal Chemistry
  • Antimicrobial Resistance
  • Drug Discovery

Background:

  • Antibiotic resistance is a significant clinical challenge.
  • Co-administering antibiotics can be complex due to pharmacokinetic variability.
  • Existing hybrid drugs often suffer from poor bioavailability.

Purpose of the Study:

  • To develop novel antimicrobial agents by combining drug pharmacophores into a single molecule.
  • To overcome limitations of traditional co-administration and hybrid drug approaches.
  • To create smaller, more drug-like molecules with enhanced therapeutic potential.

Main Methods:

  • Utilized a chimeric approach with click chemistry to link drug pharmacophores.
  • Employed in silico structural docking for compound design and selection.
  • Synthesized and tested novel triazole-containing compounds.

Main Results:

  • Developed compounds targeting both trimethoprim (dihydrofolate reductase) and ciprofloxacin (DNA gyrase/topoisomerase IV).
  • Achieved modest, broad-spectrum activity against Gram-negative and Gram-positive bacteria, including resistant strains.
  • Observed no significant cytotoxicity in the tested compounds.

Conclusions:

  • The chimeric approach offers a promising strategy for developing new antibiotics.
  • These novel molecules demonstrate potential for combating drug-sensitive and drug-resistant bacterial infections.
  • Further development could lead to improved treatments for challenging bacterial pathogens.