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Updated: May 19, 2026
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Iridium(III) Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II
Published on: July 7, 2015
Addressing multidrug-resistant bacterial infections with iridium-based theragnostic agents
Rama Karn1, Mahesmita Sahoo2, Sayantani Biswas3
1Centre for Environment, Indian Institute of Technology Guwahati Assam 781039 India.
RSC Medicinal Chemistry
|May 18, 2026
Summary
Researchers developed a novel iridium complex that combats bacterial infections and cancer. This metalloantibiotic targets bacterial membranes, offering a new approach to fighting antimicrobial resistance and enabling selective bacterial imaging.
Area of Science:
- Coordination Chemistry
- Materials Science
- Nanotechnology
Background:
- Antimicrobial resistance (AMR) necessitates novel therapeutic strategies.
- Transition-metal complexes offer unique properties for combating bacterial infections.
- Theranostic agents combine diagnostic and therapeutic capabilities.
Purpose of the Study:
- To develop a novel amphiphilic cyclometalated iridium complex for antibacterial applications.
- To investigate the theragnostic potential of the synthesized iridium complex.
- To explore its utility in fluorescence-based bacterial imaging.
Main Methods:
- Synthesis of an amphiphilic cyclometalated iridium complex (Ir-NH2).
- Formation of positively charged nanoaggregates in aqueous media.
- Evaluation of antibacterial and anticancer activities.
- Mechanistic studies on bacterial membrane disruption.
- Fluorescence imaging using heparin-conjugated complex (HP-Ir-NH2).
Main Results:
- The iridium complex formed nanoaggregates with potent antibacterial and anticancer effects.
- Ir-NH2 demonstrated antibacterial activity by disrupting bacterial membranes, minimizing resistance development against Staphylococcus aureus.
- HP-Ir-NH2 enabled specific targeting and fluorescence imaging of bacterial cells amidst other cell types.
Conclusions:
- The synthesized iridium complex exhibits theragnostic potential, acting as a metalloantibiotic.
- Iridium-based complexes represent a promising new frontier for antibacterial therapies and selective bacterial imaging.
- This approach offers a strategy to overcome antimicrobial resistance through novel coordination chemistry.
