Metallointercalators-DNA Tetrahedron Supramolecular Self-Assemblies with Increased Serum Stability
| Autor: | M. Andrey Joaqui-Joaqui, Zoe Maxwell, Mandapati V. Ramakrishnam Raju, Min Jiang, Kriti Srivastava, Fangwei Shao, Edgar A. Arriaga, Valérie C. Pierre |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | ACS Nano |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | Self-assembly of metallointercalators into DNA nanocages is a rapid and facile approach to synthesizing discrete bioinorganic host:guest structures with a high load of metal complexes. Turberfield’s DNA tetrahedron can accommodate one intercalator for every two base pairs, which corresponds to 48 metallointercalators per DNA tetrahedron. The affinity of the metallointercalator for the DNA tetrahedron is a function of both the structure of the intercalating ligand and the overall charge of the complex, with a trend in affinity [Ru(bpy)(2)(dppz)](2+) > [Tb-DOTAm-Phen](3+) >> Tb-DOTA-Phen. Intercalation of the metal complex stabilizes the DNA tetrahedron resulting in an increase of its melting temperature and, importantly, a significant increase in its stability in the presence of serum. [Ru(bpy)(2)(dppz)](2+), which has a greater affinity for DNA than [Tb-DOTAm-Phen](3+), increases the melting point and decreases degradation in serum to a greater extent than the Tb(III) complex. In the presence of lipofectamine, the metallointercalator@DNA nanocage assemblies substantially increases the cell uptake of their respective metal complex. Altogether, the facile incorporation of a large number of metal complex per assembly, the higher stability in serum, and the increased cell penetration of metallointercalator@DNA make these self-assemblies well-suited as metallodrugs. |
| Databáze: | OpenAIRE |
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