alexa Transferrin-containing, cyclodextrin polymer-based particles for tumor-targeted gene delivery.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Bellocq NC, Pun SH, Jensen GS, Davis ME

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Abstract Transferrin is a well-studied ligand for tumor targeting due to upregulation of transferrin receptors in numerous cancer cell types. Here, we report the development of a transferrin-modified, cyclodextrin polymer-based gene delivery system. The delivery system is comprised of a nanoparticle (formed by condensation of a cyclodextrin polycation with nucleic acid) that is surface-modified to display poly(ethylene glycol) (PEG) for increasing stability in biological fluids and transferrin for targeting of cancer cells that express transferrin receptor. A transferrin-PEG-adamantane conjugate is synthesized for nanoparticle modification. The transferrin conjugate retains high receptor binding and self-assembles with the nanoparticles by adamantane (host) and particle surface cyclodextrin (guest) inclusion complex formation. At low transferrin modification, the particles remain stable in physiologic salt concentrations and transfect K562 leukemia cells with increased efficiency over untargeted particles. The increase in transfection is eliminated when transfections are conducted in the presence of excess free transferrin. The transferrin-modified nanoparticles are appropriate for use in the systemic delivery of nucleic acid therapeutics for metastatic cancer applications. This article was published in Bioconjug Chem and referenced in Journal of Cancer Science & Therapy

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