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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Encapsulating Active Pharmaceutical Ingredients in Self-Assembling Adamantanes with Short DNA Zippers.
ChemMedChem 2017 November 9
Formulating pharmaceutically active ingredients for drug delivery is a challenge. There is a need for new drug delivery systems that take up therapeutic molecules and release them into biological systems. We propose a novel mode of encapsulation that involves matrices formed through co-assembly of drugs with adamantane hybrids that feature four CG dimers as sticky ends. Such adamantanes are accessible via inexpensive solution-phase syntheses, and the resulting materials show attractive properties for controlled release. This is demonstrated for two different hybrids and a series of drugs, including anticancer drugs, antibiotics, and cyclosporin. Up to 20 molar equivalents of active pharmaceutical ingredients (APIs) are encapsulated in hybrid materials. Encapsulation is demonstrated for DNA-binding and several non-DNA binding compounds. Nanoparticles were detected that range in size from 114-835 nm average diameter, and ζ potentials were found to be between -29 and +28 mV. Release of doxorubicin into serum at near-constant rates for 10 days was shown, demonstrating the potential for slow release. The encapsulation and release in self-assembling matrices of dinucleotide-bearing adamantanes appears to be broadly applicable and may thus lead to new drug delivery systems for APIs.
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