Friday, March 28, 2014

mPEG-PTMC for treatement of brain cancer

PolySciTech (www.polyscitech.com) provides mPEG-PTMC (methoxy polyethylene glycol-b-poly(trimethylene carbonate) (e.g. Polyvivo AK66). Recent research has shown this material to be an effective carrier for paclitaxel to glioma cells. Read more: Jiang, Xinyi, Hongliang Xin, Xianyi Sha, Jijin Gu, Ye Jiang, Kitki Law, Yanzuo Chen, Liangcen Chen, Xiao Wang, and Xiaoling Fang. "PEGylated poly (trimethylene carbonate) nanoparticles loaded with paclitaxel for the treatment of advanced glioma: in vitro and in vivo evaluation." International journal of pharmaceutics 420, no. 2 (2011): 385-394. http://dx.doi.org/10.1016/j.ijpharm.2011.08.052


“Abstract:  The aim of this study was to investigate the antitumor effect of paclitaxel (PTX)-loaded poly(ethylene glycol)–poly(trimethylene carbonate) (MPEG–PTMC) nanoparticles (NP) against gioblastoma multiforme (GMB). PTX-loaded NP (NP/PTX) were prepared with synthesized MPEG–PTMC by the emulsion/solvent evaporation technique. In vitro physiochemical characterization of those NP/PTX showed satisfactory encapsulation efficiency and loading capacity and size distribution. Cytotoxicity assay revealed that encapsulation in nanoparticles did not compromise the antitumor efficacy of PTX against U87MG cells. Pharmacokinetic study in rats demonstrated that the polymer micellar nanoparticles significantly enhanced the bioavailability of PTX than Taxol. In intracranial xenograft tumor-bearing mice, the accumulation of nanoparticles in tumor tissues increased distinctly after 12 h post i.v. More importantly, in vivo anti-tumor effect exhibited the median survival time of NP/PTX treated mice (27 days) was significantly longer than those of mice treated with Taxol (24 days), physiological saline (21 days) and blank MPEG–PTMC NP (21 days). Therefore, our results suggested that PTX-loaded MPEG–PTMC nanoparticles significantly enhanced the anti-glioblastoma activity of PTX and may be a potential vehicle in the treatment of high-grade glioma.”

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