title: The antitumor effect of a thermosensitive polymeric hydrogel containing paclitaxel in a peritoneal carcinomatosis model.
abstract: The prognosis of peritoneal carcinomatosis is regarded as poor because safe, effective therapeutic modalities are lacking. Intraperitoneal chemotherapy is one treatment option, involving the delivery of a high concentration of chemotherapeutic drugs into the abdominal cavity, but the severe side effects associated with such treatment are a major obstacle in clinical application. We evaluated the anti-cancer effects of intraperitoneal delivery of a thermosensitive polymeric hydrogel containing chemotherapeutics in an animal model of carcinomatosis. The progress of peritoneal carcinomatosis, introduced by injecting a luciferase-transfected human gastric cancer cell line (HSC44Luc) into the peritoneal cavity of nude mice, was quantitatively evaluated by in vivo bioluminescence imaging. Three days after intraperitoneal (IP) injection of HSC44Luc cells, treatment solutions were injected into the peritoneal cavity. Mice were categorized into four groups depending on treatment method; these were (1) a control PBS group (n = 5), (2) a hydrogel-only group (n = 5), (3) a paclitaxel solution (30 mg/kg) group (n = 3), and (4) a hydrogel-with-paclitaxel (15 mg/kg) group (n = 5). Quantitative photon counting was performed weekly in each animal. Mice were sacrificed on the 5th or 28th day after treatment, for pathologic evaluation. In vivo bioluminescence imaging showed that photon counts in the hydrogel-with-paclitaxel and paclitaxel solution groups were significantly lower than in the PBS group over the entire experimental period. Although neither group of responding mice showed any peritoneal nodules on the 28th day after treatment, only the paclitaxel solution group exhibited dilated edematous changes in the intestine; these side effects were absent in animals treated with hydrogel-with-paclitaxel group. In conclusion, a thermosensitive hydrogel containing paclitaxel may be a safe and effective treatment option for peritoneal carcinomatosis.
authors.affiliation: Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Jieun
authors.initials: J
authors.lastname: Yu
authors.forename: Hyuk-Joon
authors.initials: HJ
authors.lastname: Lee
authors.forename: Keun
authors.initials: K
authors.lastname: Hur
authors.forename: Mi Kyung
authors.initials: MK
authors.lastname: Kwak
authors.forename: Tae Su
authors.initials: TS
authors.lastname: Han
authors.forename: Woo Ho
authors.initials: WH
authors.lastname: Kim
authors.forename: Soo-Chang
authors.initials: SC
authors.lastname: Song
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Yanagihara
authors.forename: Han-Kwang
authors.initials: HK
authors.lastname: Yang
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology*; D002277:Carcinoma / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism / Q000556:secondary; D045744:Cell Line, Tumor; D002626:Chemistry, Pharmaceutical; D004337:Drug Carriers; D005260:Female; D006801:Humans; D020100:Hydrogels; D049409:Luciferases, Firefly / Q000096:biosynthesis / Q000235:genetics; D008163:Luminescent Measurements; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D017239:Paclitaxel / Q000008:administration & dosage / Q000737:chemistry / Q000494:pharmacology*; D010534:Peritoneal Neoplasms / Q000235:genetics / Q000378:metabolism / Q000517:prevention & control* / Q000556:secondary; D011108:Polymers / Q000737:chemistry*; D013274:Stomach Neoplasms / Q000188:drug therapy* / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D013696:Temperature; D013997:Time Factors; D014162:Transfection; D023041:Xenograft Model Antitumor Assays
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004337:Drug Carriers; D020100:Hydrogels; D011108:Polymers; D049409:Luciferases, Firefly; D017239:Paclitaxel