title: In vitro characterization of methotrexate loaded poly(lactic-co-glycolic) acid microspheres and antitumor efficacy in Sarcoma-180 mice bearing tumor.
abstract: Methotrexate (MTX) loaded poly (lactic-co-glycolic) acid (PLGA) microspheres were prepared by emulsion solvent evaporation technique. The mean diameter of the microspheres was affected by the type of emulsion stabilizer, polymer concentration, aqueous and organic phase volume and stirring speed. The in vitro release was triphasic and was dependent on copolymer composition and molecular weight of the polymer. Antitumor efficacy in Sarcoma-180 tumor bearing mice exhibited increased volume doubling time (18 +/- 2.7 days) compared to plain subcutaneous injection of methotrexate (8 +/- 0.7 days). Preliminary pharmacokinetic studies following subcutaneous administration of MTX loaded PLGA microspheres illustrated the controlled release of the drug. The studies demonstrated the feasibility of employing PLGA as an effective carrier for antineoplastic drug like methotrexate.
authors.affiliation: Department of Pharmaceutics, College of Pharmaceutical Sciences, Kasturba Medical College, Manipal, India.
authors.forename: U V
authors.initials: UV
authors.lastname: Singh
authors.forename: N
authors.initials: N
authors.lastname: Udupa
mesh_terms: D000818:Animals; D000964:Antimetabolites, Antineoplastic / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D002214:Capsules; D004337:Drug Carriers; D004339:Drug Compounding; D004354:Drug Screening Assays, Antitumor; D019344:Lactic Acid; D008727:Methotrexate / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D010316:Particle Size; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers; D012510:Sarcoma 180 / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D013499:Surface Properties
chemical_list: D000964:Antimetabolites, Antineoplastic; D002214:Capsules; D004337:Drug Carriers; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D008727:Methotrexate