Azido carbonyl compounds as DNA cleaving agents

Area of Science:

• Photochemistry
• Molecular Biology
• Organic Chemistry

Background:

• Azido carbonyl compounds are known photoactive molecules.
• Understanding DNA cleavage mechanisms is crucial for therapeutic applications.
• UV-induced radical generation can impact biological molecules.

Purpose of the Study:

• To investigate the DNA cleavage potential of azido carbonyl compounds upon UV irradiation.
• To explore the influence of compound structure and concentration on DNA cleavage.
• To synthesize and evaluate novel naphthalene-based azido carbonyl compounds for DNA interaction.

Main Methods:

• Irradiation of azido carbonyl compounds with UV light (≥310 nm and ≥350 nm).
• Assessing single-strand DNA cleavage efficiency at pH 7.0.
• Studying the effect of compound concentration and aromatic ring substituents.
• Conducting DNA binding studies using a weak intercalation mode analysis.

Main Results:

• UV irradiation (≥310 nm) of azido carbonyl compounds produced triplet alkyl nitrenes and aroyl radicals.
• Efficient single-strand DNA cleavage was observed at pH 7.0.
• DNA cleavage ability correlated with compound concentration and aromatic ring substituents.
• Naphthalene-based compounds demonstrated DNA cleavage at longer UV wavelengths (≥350 nm).
• Binding studies indicated weak intercalation of these compounds with ct-DNA.

Conclusions:

• Azido carbonyl compounds are effective agents for UV-induced single-strand DNA cleavage.
• Structural modifications, particularly naphthalene incorporation, enhance DNA cleavage at longer UV wavelengths.
• The observed weak intercalation suggests a potential mechanism for DNA interaction and cleavage.