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Iontophoretic delivery of oligonucleotide derivatives into mouse tumor
V V Vlassov1, M V Nechaeva, V N Karamyshev
1Institute of Bioorganic Chemistry, Siberian Division of Russian Academy of Sciences, Novosibirsk.
Abstract:
Oligodeoxyribonucleotides (22-mers) were delivered through the skin of C3H mice in the region of a mammary gland tumor by means of iontophoresis. It was shown that the oligonucleotides enter the tumor, cross it, and reach all mouse organs. Electrophoretic analysis of the oligonucleotide extracted from tumor showed that the compounds were delivered in the tissue in the intact state.
Insights
Oligodeoxyribonucleotides were effectively delivered through the skin to mammary tumors in mice using iontophoresis. These intact compounds reached the tumor and all other organs, demonstrating successful transdermal delivery.
Area of Science:
- Pharmacology
- Biotechnology
- Oncology
Background:
- Oligodeoxyribonucleotides show therapeutic potential but effective delivery remains a challenge.
- Transdermal drug delivery offers a non-invasive route for systemic and localized treatment.
- Targeted delivery to tumors is crucial for maximizing efficacy and minimizing side effects.
Purpose of the Study:
- To investigate the efficacy of iontophoresis for transdermal delivery of oligodeoxyribonucleotides.
- To assess the biodistribution and integrity of oligodeoxyribonucleotides delivered to a mammary gland tumor in mice.
- To evaluate the potential of iontophoresis as a method for delivering nucleic acid-based therapeutics.
Main Methods:
- Oligodeoxyribonucleotides (22-mers) were administered via iontophoresis to the skin overlying mammary gland tumors in C3H mice.
- Tissue samples, including the tumor and various organs, were collected after administration.
- Oligonucleotides were extracted and analyzed using electrophoresis to determine their presence and integrity.
Main Results:
- Iontophoresis successfully facilitated the skin penetration of oligodeoxyribonucleotides.
- The delivered oligodeoxyribonucleotides were found within the tumor, indicating successful tumor targeting.
- The compounds were detected in all examined mouse organs, suggesting systemic distribution.
- Electrophoretic analysis confirmed that the oligodeoxyribonucleotides remained intact after delivery to the tumor tissue.
Conclusions:
- Iontophoresis is an effective method for transdermal delivery of oligodeoxyribonucleotides.
- This technique allows for the intact delivery of oligodeoxyribonucleotides to mammary tumors and systemic circulation.
- The findings support the potential of iontophoresis for delivering nucleic acid therapeutics in cancer treatment.