Investigation of simple BODIPY dyes as G-quadruplex recognizing ligands

Area of Science:

• Supramolecular Chemistry
• Biophysical Chemistry
• Organic Dyes

Background:

• BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) dyes are crucial fluorescent probes for biomolecule interactions.
• Understanding their interactions with various DNA structures is vital for developing new diagnostic and therapeutic tools.
• This research focuses on specific BODIPY derivatives with modifications at the meso position.

Purpose of the Study:

• To investigate the optical properties and DNA binding interactions of novel BODIPY dyes.
• To evaluate the selectivity of these dyes towards different DNA secondary structures, including tetraplexes.
• To assess the biological activity of the synthesized BODIPY derivatives.

Main Methods:

• Biophysical techniques were employed to study interactions with various DNA forms (i-motif, G4s, dsDNA, ssDNA).
• Spectroscopic methods were used to analyze optical properties.
• MTT assay was utilized to evaluate cytotoxicity and biological activity.

Main Results:

• BODIPY derivatives showed preferential binding to DNA tetraplexes over other DNA forms.
• Specific ligands (1 and 3) demonstrated a tendency to destabilize the parallel c-MYC G-quadruplex.
• End-stacking was identified as the primary interaction mode between BODIPY ligands and parallel G-quadruplex, confirmed by DNAzyme experiments.

Conclusions:

• The studied BODIPY dyes exhibit selective binding towards DNA tetraplexes, particularly G-quadruplex structures.
• The findings suggest potential applications of these BODIPY derivatives as selective DNA-binding agents and in G-quadruplex targeting.
• Further investigation into their biological activity and mechanism of action is warranted.