Tetraplex DNA specific ligands based on the fluorenone-carboxamide scaffold

Area of Science:

• Medicinal Chemistry
• Molecular Biology
• Biophysics

Background:

• DNA G-quadruplexes are non-canonical DNA structures implicated in various cellular processes.
• Targeting G-quadruplexes offers a promising strategy for novel therapeutic interventions.
• Fluorenone-carboxamide derivatives are explored for their potential biological activities.

Purpose of the Study:

• To investigate the DNA binding properties of novel fluorenone-carboxamide compounds.
• To identify compounds with high affinity and specificity for DNA G-quadruplex structures.
• To propose a model for rational drug design of G-quadruplex-binding agents.

Main Methods:

• UV spectroscopy was employed to analyze compound-DNA interactions.
• Competition dialysis was used to assess binding affinity and specificity.
• Comparative molecular modeling provided insights into binding mechanisms.

Main Results:

• A series of fluorenone-carboxamide compounds were synthesized and evaluated.
• Morpholino derivative 10 exhibited significant affinity and specificity for DNA G-quadruplexes.
• Molecular modeling results were consistent with experimental data.

Conclusions:

• Compound 10 demonstrates potential as a selective DNA G-quadruplex binder.
• The study provides a foundation for designing potent and specific G-quadruplex-targeting agents.
• Further development of these compounds could lead to new therapeutic strategies.