Drug release from functionalized oligodeoxynucleotide by photo-induced electron transfer

Area of Science:

• Biochemistry
• Molecular Biology
• Photochemistry

Background:

• Oligodeoxynucleotides (ODNs) are short DNA sequences with diverse applications.
• Photoreactive molecules can be triggered by light for controlled release.
• Targeted drug delivery remains a challenge in medicine.

Purpose of the Study:

• To synthesize and characterize a novel photoreactive oligodeoxynucleotide (P-ODN).
• To investigate the light-induced drug release mechanism of the P-ODN system.
• To assess the efficiency and specificity of drug release.

Main Methods:

• Synthesis of a hairpin-type oligodeoxynucleotide (P-ODN) incorporating an o-nitrobenzyl chromophore and a 1-aminonaphthalene triplet quencher.
• Formation of a hybrid structure between P-ODN and complementary DNA.
• Photoirradiation experiments to induce drug release.
• Comparative analysis of drug release with and without complementary DNA.

Main Results:

• The synthesized P-ODN effectively released an associated drug upon photoirradiation.
• Drug release was significantly enhanced when the P-ODN formed a hybrid with complementary DNA.
• In the absence of complementary DNA, photo-induced drug release was substantially suppressed.

Conclusions:

• The developed P-ODN system enables efficient and light-controlled drug release.
• The presence of complementary DNA is crucial for the effective functioning of this drug delivery system.
• This technology holds promise for targeted drug delivery applications.