Targeting promoter G-quadruplex DNAs by indenopyrimidine-based ligands

Area of Science:

• Medicinal Chemistry
• Molecular Biology
• Biochemistry

Background:

• G-quadruplex DNA structures play crucial roles in regulating gene expression and telomere maintenance.
• Stabilizing G-quadruplexes with small molecules is a potential anticancer therapeutic strategy.
• Achieving selectivity for G-quadruplexes over duplex DNA and specific topologies remains a challenge.

Purpose of the Study:

• To synthesize novel indenopyrimidine derivatives with drug-like properties.
• To investigate the binding interactions of these derivatives with various DNA structures, including oncogenic promoters (c-myc, c-kit) and telomeric G-quadruplexes.
• To evaluate the potential of these compounds as targeted anticancer agents.

Main Methods:

• Chemical synthesis of indenopyrimidine derivatives.
• DNA binding studies using various DNA sequences (promoter, telomeric, duplex).
• Spectroscopic and biophysical techniques to assess stabilization.
• Molecular modeling to elucidate binding modes.

Main Results:

• Indenopyrimidine derivatives demonstrated specific stabilization of promoter G-quadruplexes over telomeric G-quadruplexes and duplex DNA.
• The compounds exhibited drug-like properties suitable for therapeutic development.
• Molecular modeling revealed a dual binding mode within the G-quadruplex structure.

Conclusions:

• The indenopyrimidine scaffold is a promising platform for developing selective G-quadruplex stabilizers.
• These compounds show potential for targeted anticancer therapy by modulating oncogene expression and telomerase activity.
• The study highlights the importance of specific G-quadruplex topology targeting for drug efficacy.