Gold(I/III)-Phosphine Complexes as Potent Antiproliferative Agents

Area of Science:

• Inorganic Chemistry
• Medicinal Chemistry
• Cancer Research

Background:

• Gold complexes are explored for their therapeutic potential.
• Developing novel gold compounds with anticancer activity is crucial.

Purpose of the Study:

• To synthesize and characterize novel gold(I) and gold(III) phosphine complexes.
• To evaluate the in vitro anticancer efficacy and cellular mechanisms of these gold complexes.

Main Methods:

• Synthesis of gold complexes using various gold precursors and phosphine ligands.
• Characterization by NMR, mass spectrometry, X-ray crystallography, and cyclic voltammetry.
• Anticancer activity assessed via IC50 values across multiple cancer cell lines and a healthy cell line.
• Cellular uptake measured by ICP-OES; apoptosis and cell cycle arrest analyzed.

Main Results:

• Novel distorted Au(I) and cyclometalated Au(III) complexes were synthesized.
• Complexes exhibited potent cytotoxicity against K562, H460, and OVCAR8 cancer cells (IC50 ~0.10-2.53 μM).
• Differential cellular uptake and induction of apoptosis were observed; complexes 1 and 3 caused G1 cell cycle arrest.

Conclusions:

• Stable gold-phosphine complexes with variable oxidation states are effective anticancer agents.
• These findings support further development of gold complexes in anticancer drug discovery.
• The study highlights the potential of gold complexes in targeting cancer cells through apoptosis and cell cycle disruption.