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Anticancer Metal Complexes: Synthesis and Cytotoxicity Evaluation by the MTT Assay

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Fluorinated N-Heterocyclic Carbene Silver(I) Complexes with High Cancer Cell Selectivity.

Oliver S King¹, Benjamin J Hofmann¹, Aran E Boakye-Smith¹

¹School of Chemistry, Pharmacy and Pharmacology, University of East Anglia, Norwich, Norfolk NR1 1GE, United Kingdom.

Organometallics

|November 1, 2024

Summary

Researchers developed new silver complexes with N-heterocyclic carbene ligands for breast cancer treatment. The binuclear benzimidazole complex showed high selectivity against cancer cells, indicating potential for late-stage breast cancer therapy.

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Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay

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Published on: February 9, 2021

Area of Science:

Coordination Chemistry
Medicinal Chemistry
Materials Science

Background:

N-heterocyclic carbenes (NHCs) are versatile ligands in coordination chemistry.
Silver(I) complexes have demonstrated significant biological activities.
Developing novel anticancer agents with improved selectivity is a critical need.

Purpose of the Study:

Synthesize and characterize novel functionalized (benz)imidazolium NHC ligands and their silver(I) complexes.
Evaluate the anticancer activity and selectivity of these compounds against breast cancer cell lines.
Investigate the mechanism of action, including cellular uptake and DNA interaction.

Main Methods:

Synthesis of five new NHC ligands and four Ag(I)-NHC complexes.
Full characterization including single crystal X-ray diffraction.
In vitro screening against breast and noncancerous cell lines, ICP-MS for silver uptake, DNA interaction studies, molecular docking, and ROS evaluation.

Main Results:

The mononuclear benzimidazole complex exhibited the highest cytotoxicity.
The binuclear benzimidazole complex demonstrated superior cancer cell selectivity.
A strong correlation was observed between cellular silver uptake and cytotoxicity.
The binuclear complex showed promising activity against MDA-MD-231 breast cancer cells.

Conclusions:

The synthesized Ag(I)-NHC complexes show potential as anticancer agents.
The binuclear benzimidazole complex is a highly selective candidate for treating late-stage breast cancer.
Further development could lead to novel therapeutic strategies for breast cancer treatment.