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  • A nanoparticle-based formulation consisting of polymeric micelles (PMs), made with poly(N-vinylpyrrolidone)-block-poly(D,L-lactide) (PVP-b-PDLLA) block polymers, encapsulating the taxane docetaxel, a semi-synthetic analogue of paclitaxel, with potential antineoplastic activity. Upon intravenous administration of the docetaxel PMs, the nanoparticles are able to accumulate at the tumor site due to the unique characteristics of the tumor\'s vasculature, while avoiding normal, healthy tissue. In turn, docetaxel is released locally at the target tumor site where it binds specifically to the beta-tubulin subunit of the microtubule, thereby stabilizing tubulin and inhibiting microtubule disassembly. This results in cell-cycle arrest at the G2/M phase, thereby preventing cell proliferation. This agent also inhibits pro-angiogenic factors such as vascular endothelial growth factor (VEGF) and induces various mediators of the inflammatory response. Compared to docetaxel alone, this formulation may enhance stability and improve delivery, thereby increasing docetaxel\'s efficacy while avoiding systemic exposure, which minimizes its toxicity.
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