title: [Experimental study of cisplatin microspheres incorporated in polylactic acid and polyethylene glycol acid on peritoneal carcinomatosis in rats].
abstract: Cisplatin incorporated into polylactic acid/polyethylene glycol acid blend polymeric microspheres was prepared as a dosage (CDDP-MS) by solvent evaporation method in oil-in-oil emulsion system. CDDP-MS and CDDP aqueous solutions (CDDP-SOL) were intraperitoneally administered to compare the tissue distribution of CDDP in 72 rats each. On 0.5, 1, 7, 14, 21 and 30 days, the omentum, lung, liver and kidney were removed, and the CDDP concentration was measured. The CDDP concentration of CDDP-MS group was maintained at a high level in the omentum for a long time. On the other hand, the CDDP level of the CDDP-MS group was low in the lung, liver and kidney, compared with the CDDP-SOL group. Additionally, acute toxicity of anticancer drug in CDDP-MS group was reduced, compared with CDDP-SOL. The effects of CDDP-MS, CDDP-SOL, empty-MS and non-therapy group on survival time were compared using intraperitoneally administered Yoshida sarcoma. The survival time in CDDP-MS, CDDP-SOL, non-therapy and empty-MS group were 43 +/- 24, 11.7 +/- 4.7, 9.8 +/- 1.1, and 7.8 +/- 1.1 days each. Consequently, it was suggested that CDDP-MS is useful as a tool in loco-regional chemotherapy using drug delivery system.
authors.affiliation: First Dept. of Surgery, Kagoshima University, School of Medicine.
authors.forename: K
authors.initials: K
authors.lastname: Tokuda
authors.forename: S
authors.initials: S
authors.lastname: Natsugoe
authors.forename: M
authors.initials: M
authors.lastname: Shimada
authors.forename: T
authors.initials: T
authors.lastname: Kumanohoso
authors.forename: H
authors.initials: H
authors.lastname: Yoshizawa
authors.forename: Y
authors.initials: Y
authors.lastname: Uemura
authors.forename: Y
authors.initials: Y
authors.lastname: Hatate
authors.forename: K
authors.initials: K
authors.lastname: Nakamura
authors.forename: K
authors.initials: K
authors.lastname: Yamada
authors.forename: M
authors.initials: M
authors.lastname: Nedachi
authors.forename: T
authors.initials: T
authors.lastname: Aiko
mesh_terms: D000818:Animals; D002945:Cisplatin / Q000008:administration & dosage* / Q000493:pharmacokinetics; D003692:Delayed-Action Preparations; D016503:Drug Delivery Systems; D004655:Emulsions; D019344:Lactic Acid; D008863:Microspheres; D010534:Peritoneal Neoplasms / Q000188:drug therapy*; D011091:Polyesters; D011092:Polyethylene Glycols; D011108:Polymers; D051381:Rats; D012517:Sarcoma, Yoshida / Q000188:drug therapy
chemical_list: D003692:Delayed-Action Preparations; D004655:Emulsions; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; D011092:Polyethylene Glycols; C033616:poly(lactide); D002945:Cisplatin