Abstract
To evaluate the anti-tumor effect of ceramide or trimethylphytosphingosine-iodide (TMP-I) containing solid lipid nanoparticles (SLNs) prepared using trymyristin, phosphatidylcholine (PC), and Pluronic P85 (P85) for intravenous delivery of docetaxel. Docetaxel-loaded SLNs using ceramide or TMP-I at 3.22% (w/w) with a mean diameter of 89-137 nm were successfully prepared by high pressure homogenization. The prepared nanoparticles were characterized by particle size, zeta potential, drug content, and TEM analysis. Cellular uptake and cytotoxicity were studied using adriamycin-resistant breast cancer (MCF-7/ADR) cells. The optimized formulation's dissolution profile, pharmacokinetics, and antitumor effect in mice tumor model were compared with that of control (Taxotere(®)). The drug release rate of docetaxel from SLNs was lower than that of control (Taxotere(®)). The prepared SLNs showed higher cellular uptake of docetaxel compared to that of Taxotere(®) in MCF-7/ADR cell lines, which was further confirmed by the confocal laser scanning microscopy (CLSM) study using coumarin 6 (C6). Prepared SLNs exhibited significantly increased antitumor efficacy, compared to Taxotere(®), in MCF-7/ADR cells. In vivo pharmacokinetic study in rats ...Continue Reading
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