Interactions of selected gold(III) complexes with DNA G quadruplexes

Area of Science:

• Bioinorganic Chemistry
• Medicinal Chemistry
• Molecular Biology

Background:

• Gold(III) complexes are explored for therapeutic potential.
• Human telomeric DNA and its structures (like G-quadruplexes) are targets for drug discovery.

Purpose of the Study:

• To investigate the interactions of gold(III) complexes with human telomeric DNA.
• To identify specific binding profiles and structural effects of these complexes.

Main Methods:

• Biophysical techniques including DNA melting, circular dichroism (CD), surface plasmon resonance (SPR), and electrospray ionization mass spectrometry (ESI-MS).

Main Results:

• All tested gold(III) complexes exhibited interactions with human telomeric DNA, but with distinct binding profiles.
• The dinuclear gold(III) complex Auoxo6 demonstrated high binding affinity for G-quadruplex DNA.
• Auoxo6 was effective in inducing non-canonical secondary DNA structures.

Conclusions:

• Gold(III) complexes interact with human telomeric DNA, offering diverse binding characteristics.
• Auoxo6 shows promise as a G-quadruplex binder and structure inducer.
• These findings suggest potential for novel biological and pharmacological applications of gold(III) compounds.