Function of nanoparticles in transdermal and transmucosal drug delivery systems / 中国中药杂志

Nanoparticles had received much attention in the development of new kind of pharmaceutical formation because of the special nano-effectivity. Recently, some studies discovered the special functions of the nanoparticles in transdermal and transmucosal drug delivery systems. Even though the acting mechanism of the nanoparticles in these drug delivery systems are not known, these discoveries of the special function of the nanoparticles provide new developing prospect to the drug delivery systems. This paper mainly reviews the present studying results about the nanoparticles used in the transdermal and transmucosal drug delivery systems, including the lipid nanopaticles, natural polymer and the synthesized polymer nanoparticles.

Studies on paclitaxel-loaded nanoparticles of amphiphilic block copolymer / 药学学报

<p><b>AIM</b>To investigate the paclitaxel-loaded nanoparticles of poly(ethylene glycol)-b-poly(D,L-lactic acid) amphiphilic diblock copolymer (PMT).</p><p><b>METHODS</b>PMT was prepared by solid dispersion technique. The average size and size distribution were determined by dynamic light scattering (DLS). The morphology was characterized by transmission electron microscopy (TEM) and 1HNMR. The influences of the copolymer molecular weight and the paclitaxel-fed amount on PMT were studied. Therapeutic effect of PMT was studied on Kunming mice liver cancer H22.</p><p><b>RESULTS</b>PMT showed nanometer size and spherical morphology with core and shell. The sizes of PMT increased with increasing the molecular weight of the hydrophobic segment in PEDLLA or increasing the drug-loaded amount. The tumour inhibiting effect of PMT was similar with that of Taxol.</p><p><b>CONCLUSION</b>It will provide an experiment basis for the development of new kind of intravenous administration of paclitaxel.</p>