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Journal Article
Research Support, Non-U.S. Gov't
Retargeting Polyomavirus-Like Particles to Cancer Cells by Chemical Modification of Capsid Surface.
Bioconjugate Chemistry 2017 Februrary 16
Virus-like particles based on polyomaviruses (PVLPs) are promising delivery devices for various cargoes, including nucleic acids, imaging probes, and therapeutic agents. In biological environments, the major coat protein VP1 interacts with ubiquitously distributed sialic acid residues, and therefore PVLPs show a broad tropism. For selective targeting, appropriate engineering of the PVLP surface is needed. Here, we describe a chemical approach to retarget PVLPs to cancer cells displaying abnormally high levels of transferrin receptor. We created an array of transferrin molecules on the surface of PVLPs by combining a high-yielding bioconjugation approach with specific point modification of transferrin. This artificial surface protein architecture enables (i) suppression of natural VP1-specific interactions by blocking the surface conformational epitope on the VP1 protein, (ii) unusually high cellular uptake efficiency, and (iii) selective retargeting of PVLPs to osteosarcoma (U2OS) and lymphoblastoid leukemia (CCRF-CEM) cells.
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