title: In-vitro evaluation of paclitaxel-loaded MPEG-PLGA nanoparticles on laryngeal cancer cells.
abstract: Induction chemotherapy or concurrent chemotherapy with radiotherapy can preserve laryngeal function without a detrimental effect on survival in patients with advanced laryngeal cancer. However, systemic chemotherapy with traditional injection often causes side effects. In this study, methoxy poly(ethylene glycol)-poly(lactide-co-glycolide) (MPEG-PLGA) nanoparticles (NPs) were developed as a carrier for paclitaxel, a potent cytotoxic agent. The NPs were prepared by an emulsification-solvent evaporation method with the particle size and zeta potential around 153.3+/-41.7 nm and -5.36 mV. Transmission electron microscopy showed that the NPs were homogeneous and spherical in shape. Differential scanning calorimetry and X-ray powder diffractometry did not detect any crystalline drug in the NP samples. High-performance liquid chromatography was used to measure the drug loading, encapsulation efficiency, and in-vitro drug release. The drug loading efficiency was (5.35+/-0.75)% and encapsulation efficiency was (75.56+/-2.61)%. In the in-vitro drug release study, paclitaxel was released from the NPs in a slow but time-dependent manner. In-vitro cytotoxicity of the paclitaxel-loaded NPs was investigated by using human laryngeal cancer Hep-2 cells. The anticancer activity of paclitaxel-loaded NPs was comparable with the free paclitaxel. No significant cytotoxicity was observed in blank MPEG-PLGA NPs. Laser scanning confocal microscopy was used to observe the uptake of fluorescent coumarin-6-loaded NPs by Hep-2 cells. We conclude that the formulation of NPs inhibits Hep-2 cell growth to a similar extent as free paclitaxel injection. These results suggest that MPEG-PLGA NPs may have potential as an alternative delivery system for paclitaxel.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Eye and ENT Hospital, School of Pharmacy, FuDan University, Shanghai, China.
authors.forename: Chunli
authors.initials: C
authors.lastname: Gao
authors.forename: Jun
authors.initials: J
authors.lastname: Pan
authors.forename: Weiyue
authors.initials: W
authors.lastname: Lu
authors.forename: Ming
authors.initials: M
authors.lastname: Zhang
authors.forename: Liang
authors.initials: L
authors.lastname: Zhou
authors.forename: Jie
authors.initials: J
authors.lastname: Tian
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage* / Q000493:pharmacokinetics; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004337:Drug Carriers / Q000138:chemical synthesis*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D019344:Lactic Acid / Q000008:administration & dosage*; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D017239:Paclitaxel / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D010316:Particle Size; D011092:Polyethylene Glycols / Q000008:administration & dosage*; D011100:Polyglycolic Acid / Q000008:administration & dosage*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004337:Drug Carriers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D011092:Polyethylene Glycols; C028210:monomethoxypolyethylene glycol; D017239:Paclitaxel