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Roxithromycin antagonism with essential and trace elements.

M Saeed Arayne1, Najma Sultana, Rizwana Sabri

  • 1Department of Chemistry, University of Karachi, Pakistan.

Pakistan Journal of Pharmaceutical Sciences
|January 18, 2006
PubMed
Summary
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Roxithromycin metal complexes were studied for antibacterial activity. Most complexes showed no change in activity compared to roxithromycin, with some exhibiting antagonistic effects against specific bacteria.

Area of Science:

  • Pharmacology
  • Medicinal Chemistry
  • Microbiology

Background:

  • Macrolide antibiotics, like roxithromycin, are crucial in treating bacterial infections.
  • Understanding the impact of metal complexation on antibiotic efficacy is vital for drug development.

Purpose of the Study:

  • To investigate the antibacterial activity of roxithromycin metal complexes.
  • To compare the synergistic or antagonistic effects of these complexes with the parent drug.

Main Methods:

  • Synthesized roxithromycin complexes with various essential and trace elements (Mg, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd).
  • Evaluated antibacterial activity using minimum inhibitory concentration (MIC) and zone of inhibition assays.
  • Tested against Gram-negative (E. coli, S. typhi, P. vulgaris, S. dysentery, K. pneumoniae) and Gram-positive (S. aureus, E. faecalis, S. epidermidis) bacteria.

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Main Results:

  • Most roxithromycin metal complexes exhibited no significant change in antibacterial activity compared to roxithromycin.
  • Antagonistic effects (increased MIC) were observed for some complexes against specific microorganisms.
  • No broad synergistic enhancement of antibacterial activity was noted.

Conclusions:

  • Complexation with most essential and trace elements does not significantly alter roxithromycin's antibacterial profile.
  • Metal complexation can lead to antagonistic effects, necessitating careful consideration in drug design.
  • Further research is needed to explore specific metal-antibiotic interactions and their clinical implications.