title: Intraperitoneal administration of paclitaxel solubilized with poly(2-methacryloxyethyl phosphorylcholine-co n-butyl methacrylate) for peritoneal dissemination of gastric cancer.
abstract: Intraperitoneal (i.p.) administration of paclitaxel (PTX) is a hopeful therapeutic strategy for peritoneal malignancy. Intravenously (i.v.) injected nanoparticle anticancer drugs are known to be retained in the blood stream for a long time and favorably extravasated from vessels into the interstitium of tumor tissue. In this study, we evaluated the effect of i.p. injection of PTX (PTX-30W), which was prepared by solubulization with water-soluble amphiphilic polymer composed of PMB-30W, a co-polymer of 2-methacryloxyethyl phosphorylcholine and n-butyl methacrylate, for peritoneal dissemination of gastric cancer. In a peritoneal metastasis model with transfer of MKN45P in nude mice, the effect of i.p. administration of PTX-30W was compared with conventional PTX dissolved in Cremophor EL (PTX-Cre). The drug accumulation in peritoneal nodules was evaluated with intratumor PTX concentration and fluorescence microscopic observation. PTX-30W reduced the number of metastatic nodules and tumor volume significantly more than did conventional PTX dissolved in Cremophor EL (PTX-Cre), and prolonged the survival time (P < 0.05). PTX concentration in disseminated tumors measured by HPLC was higher in the PTX-30W than in the PTX-Cre group up to 24 h after i.p. injection. Oregon green-conjugated PTX-30W, i.p. administered, preferentially accumulated in relatively hypovascular areas in the peripheral part of disseminated nodules, which was significantly greater than the accumulation of PTX-Cre. I.p. administration of PTX-30W may be a promising strategy for peritoneal dissemination, due to its superior characteristics to accumulate in peritoneal lesions.
authors: Department of Surgery, Division of Surgical Oncology, School of Engineering, University of Tokyo, Tokyo, Japan.
authors: Daisuke
authors: D
authors: Soma
authors: Joji
authors: J
authors: Kitayama
authors: Tomohiro
authors: T
authors: Konno
authors: Kazuhiko
authors: K
authors: Ishihara
authors: Jun
authors: J
authors: Yamada
authors: Takao
authors: T
authors: Kamei
authors: Hironori
authors: H
authors: Ishigami
authors: Shoichi
authors: S
authors: Kaisaki
authors: Hirokazu
authors: H
authors: Nagawa
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000493:pharmacokinetics; D045744:Cell Line, Tumor; D002851:Chromatography, High Pressure Liquid; D004337:Drug Carriers / Q000008:administration & dosage* / Q000493:pharmacokinetics; D005260:Female; D006801:Humans; D007274:Injections, Intraperitoneal; D008689:Methacrylates / Q000008:administration & dosage* / Q000493:pharmacokinetics; D051379:Mice; D008819:Mice, Nude; D017239:Paclitaxel / Q000008:administration & dosage* / Q000493:pharmacokinetics; D010534:Peritoneal Neoplasms / Q000188:drug therapy* / Q000556:secondary; D010767:Phosphorylcholine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000493:pharmacokinetics; D013274:Stomach Neoplasms / Q000188:drug therapy / Q000473:pathology; D014018:Tissue Distribution; D023041:Xenograft Model Antitumor Assays
chemical_list: D000970:Antineoplastic Agents; D004337:Drug Carriers; D008689:Methacrylates; D010767:Phosphorylcholine; C079200:poly(2-methacryloyloxyethyl phosphorylcholine-co-n-butyl methacrylate); D017239:Paclitaxel