Abstract
A multiarm nanomedicine template has been designed following bottom-up approach, which target neuropilin-1 (Nrp-1) receptor of cancer cells. Through this venture, we discovered that cucurbit [6] uril (CB [6]) binds with tubulin close to binding pocket of vinblastine site and perturbs tubulin polymerization. To increase the specificity of gold nanoparticle (GNP) toward Nrp-1-rich cancer cells, we further modified this GNP with Nrp-1 receptor-specific short peptide (CGNKRTR). Remarkably, we found an interesting self-assembly process upon addition of curcumin into the CB [6] and peptide-functionalized GNP, leading to the formation of a spherical nanocapsule (CGNP·Cur). It can deliver and release significantly higher amounts of anticancer drug curcumin in Nrp-1-rich cancer cells. It causes microtubule depolymerization and significant tumor regression in Nrp-1 overexpressed mice melanoma model. These interesting findings show that nanocapsule has high potential to develop a powerful anticancer nanomedicine and help in its preclinical validation.
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