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Author Spotlight: Characterizing DNA G-Quadruplex by Bis-3-Chloropiperidine Based Chemical Mapping

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Published on: May 12, 2023

Tailoring a lead-like compound targeting multiple G-quadruplex structures.

Jussara Amato¹, Chiara Platella², Sara Iachettini³

¹Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy.

European Journal of Medicinal Chemistry

|December 12, 2018

Summary

This summary is machine-generated.

Researchers developed novel G-quadruplex (G4) DNA ligands with improved potency and selectivity. Compound S4-5 demonstrated significant antiproliferative effects on tumor cells while sparing normal cells, offering a promising therapeutic candidate.

Keywords:

Affinity chromatography-based screenings Biophysical characterization G-quadruplex ligands In vitro biological assays Molecular docking

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Area of Science:

Medicinal Chemistry
Chemical Biology
Molecular Biology

Background:

G-quadruplex (G4) DNA structures are increasingly recognized as therapeutic targets.
Developing selective G4 ligands is crucial for targeted cancer therapies.
Compound 4, a furobenzoxazine naphthoquinone, served as a lead compound for G4 targeting.

Purpose of the Study:

To synthesize and evaluate a focused library of G4 ligand analogs.
To enhance the potency, selectivity, and therapeutic profile of G4 targeting compounds.
To identify a lead compound with improved G4 vs. duplex DNA discrimination and reduced cytotoxicity.

Main Methods:

Synthesis of furobenzoxazine naphthoquinone analogs with varied pendant groups.
G4-CPG assay for screening G4 ligand affinity and selectivity.
Biological assays to assess DNA damage and antiproliferative effects.
Biophysical characterization (e.g., NMR) and molecular docking studies.

Main Results:

All synthesized analogs bound to various G4 structures, acting as multi-target ligands.
Two analogs demonstrated complete discrimination between G4 and duplex DNA.
Compounds induced DNA damage and exhibited antiproliferative activity against tumor cells in the low μM range.
Compound S4-5 showed higher G4 affinity, improved G4 vs. duplex DNA selectivity, and lower cytotoxicity to normal cells compared to compound 4.

Conclusions:

The furobenzoxazine naphthoquinone scaffold can be optimized for potent and selective G4 targeting.
Compound S4-5 represents a promising G4 ligand with a favorable therapeutic window.
Further investigation into S4-5's mechanism of action and in vivo efficacy is warranted.