title: Intratumoral delivery of paclitaxel-loaded poly(lactic-co-glycolic acid) microspheres for Hep-2 laryngeal squamous cell carcinoma xenografts.
abstract: The introduction of induction chemotherapy provides an expectation of laryngeal function preservation without reduction in survival for patients with advanced laryngeal squamous cell carcinoma. The antitumor activity of conventional intravenous chemotherapy, however, is limited by systemic toxicity. The polymeric drug system delivered locally provides a novel modality of increasing therapeutic concentrations of drug for a prolonged period while decreasing systemic levels. In the current study, paclitaxel-loaded sustained-release microspheres were developed using poly(lactic-co-glycolic acid) as a drug carrier. Intratumoral administration of paclitaxel in the formulation of polymer showed enhanced efficacy against laryngeal squamous cell carcinoma in nude mice compared with conventional paclitaxel injection via the intratumoral or intraperitoneal route. No significant toxic reactions were observed in the experiment. Immunohistochemical findings indicated that paclitaxel exhibited antiangiogenic activity by inhibiting the expression of basic fibroblast growth factor and vascular endothelial growth factor within the tumor. Moreover, this effect could be better exploited via localized delivery of polymeric paclitaxel. In conclusion, direct administration of polymeric drug system at the tumor sites proved to be promising for the treatment of laryngeal carcinoma.
authors.affiliation: Department of Otolaryngology, Eye and ENT Hospital, FuDan University, Shanghai, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Xie
authors.forename: Liang
authors.initials: L
authors.lastname: Zhou
authors.forename: Tao
authors.initials: T
authors.lastname: Hu
authors.forename: Ming
authors.initials: M
authors.lastname: Yao
mesh_terms: D020533:Angiogenesis Inhibitors / Q000494:pharmacology; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000627:therapeutic use*; D002196:Capillaries / Q000187:drug effects; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy* / Q000473:pathology; D045744:Cell Line, Tumor; D002851:Chromatography, High Pressure Liquid; D004337:Drug Carriers; D004339:Drug Compounding; D016222:Fibroblast Growth Factor 2 / Q000378:metabolism; D007150:Immunohistochemistry; D019344:Lactic Acid; D007822:Laryngeal Neoplasms / Q000188:drug therapy* / Q000473:pathology; D051379:Mice; D008863:Microspheres; D009368:Neoplasm Transplantation; D017239:Paclitaxel / Q000008:administration & dosage / Q000627:therapeutic use*; D010316:Particle Size; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers; D014183:Transplantation, Heterologous; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism
chemical_list: D020533:Angiogenesis Inhibitors; D000972:Antineoplastic Agents, Phytogenic; D004337:Drug Carriers; D011108:Polymers; D042461:Vascular Endothelial Growth Factor A; D016222:Fibroblast Growth Factor 2; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D017239:Paclitaxel