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Antimicrobial Proteins01:23

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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
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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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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Vanadium complexes as potential metal-based antimicrobial drugs.

Meena Kumari1, Maridula Thakur2, Sonika Sharma3

  • 1Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India.

Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry
|November 26, 2024
PubMed
Summary

Vanadium complexes show promise as novel antimicrobial drugs to combat rising antibiotic resistance. Their efficacy and toxicity depend on the vanadium oxidation state, with V(III) being least toxic and V(V) most toxic.

Keywords:
Antibacterial and antifungal activitiesAntibiotic resistanceAntimicrobial agentsStructure–activity relationshipV(V/IV/III) Complexes

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Area of Science:

  • Medicinal Chemistry
  • Inorganic Chemistry
  • Microbiology

Background:

  • Antibiotic resistance is a growing global health crisis, necessitating the development of new antimicrobial agents.
  • Coordination compounds, particularly metallodrugs, offer a promising avenue for overcoming resistance due to chelation-enhanced properties.
  • Vanadium compounds are explored for therapeutic potential due to their biological roles and relatively lower toxicity compared to other biometals.

Purpose of the Study:

  • To review the biological significance and antimicrobial potential of vanadium complexes across different oxidation states (V(V), V(IV), and V(III)).
  • To explore the role of chelation in enhancing the antimicrobial activity of vanadium-based compounds.
  • To establish a correlation between vanadium oxidation state, toxicity, and antimicrobial potency.

Main Methods:

  • Literature review of studies investigating vanadium complexes as antimicrobial agents.
  • Analysis of data on the synthesis, characterization, and biological evaluation of vanadium complexes.
  • Correlation analysis of vanadium oxidation states with observed antimicrobial efficacy and toxicity profiles.

Main Results:

  • Chelation of vanadium enhances lipophilicity, facilitating microbial cell membrane penetration and increasing antimicrobial activity.
  • Vanadium complexes exhibit a range of antimicrobial efficacies dependent on the specific complex and microbial target.
  • A clear relationship exists between vanadium oxidation state and toxicity, with V(III) complexes demonstrating the lowest toxicity and V(V) complexes the highest.

Conclusions:

  • Vanadium complexes represent a viable class of metallodrugs for developing novel antimicrobial therapies.
  • The antimicrobial potency and safety profile of vanadium complexes are significantly influenced by the metal's oxidation state.
  • Further research into V(III) and V(IV) complexes is warranted for the development of effective and safe antimicrobial agents against resistant microbes.