title: The effect of poloxamer 188 on nanoparticle morphology, size, cancer cell uptake, and cytotoxicity.
abstract: The aim of this work was to investigate the effect of triblock copolymer poloxamer 188 on nanoparticle morphology, size, cancer cell uptake, and cytotoxicity. Docetaxel-loaded nanoparticles were prepared by oil-in-water emulsion/solvent evaporation technique using biodegradable poly(lactic-co-glycolic acid) (PLGA) with or without addition of poloxamer 188, respectively. The resulting nanoparticles were found to be spherical with a rough and porous surface. The nanoparticles had an average size of around 200 nm with a narrow size distribution. The in vitro drug-release profile of both nanoparticle formulations showed a biphasic release pattern. An increased level of uptake of PLGA/poloxamer 188 nanoparticles in the docetaxel-resistant MCF-7 TAX30 human breast cancer cell line could be found in comparison with that of PLGA nanoparticles. In addition, the docetaxel-loaded PLGA/poloxamer 188 nanoparticles achieved a significantly higher level of cytotoxicity than that of docetaxel-loaded PLGA nanoparticles and Taxotere (P < .05). In conclusion, the results showed advantages of docetaxel-loaded PLGA nanoparticles incorporated with poloxamer 188 compared with the nanoparticles without incorporation of poloxamer 188 in terms of sustainable release and efficacy in breast cancer chemotherapy.
  
  
  BACKGROUND
  The effects of poloxamer 188, a triblock copolymer were studied on nanoparticle morphology, size, cancer cell uptake and cytotoxicity. An increased level of uptake of PLGA/poloxamer 188 nanoparticles in resistant human breast cancer cell line was demonstrated, resulting in a significantly higher level of cytotoxicity.
authors.affiliation: The Shenzhen Key Laboratory of Gene and Antibody Therapy, Center for Biotech and Bio-Medicine and Division of Life Sciences, Graduate School at Shenzhen, Tsinghua University, Shenzhen, People's Republic of China.
authors.forename: Fei
authors.initials: F
authors.lastname: Yan
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Yi
authors.initials: Y
authors.lastname: Zheng
authors.forename: Lin
authors.initials: L
authors.lastname: Mei
authors.forename: Lina
authors.initials: L
authors.lastname: Tang
authors.forename: Cunxian
authors.initials: C
authors.lastname: Song
authors.forename: Hongfan
authors.initials: H
authors.lastname: Sun
authors.forename: Laiqiang
authors.initials: L
authors.lastname: Huang
mesh_terms: D002152:Calorimetry, Differential Scanning; D016923:Cell Death / Q000187:drug effects; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003374:Coumarins / Q000378:metabolism; D000077143:Docetaxel; D006801:Humans; D020128:Inhibitory Concentration 50; D019344:Lactic Acid / Q000737:chemistry; D018613:Microscopy, Confocal; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009369:Neoplasms / Q000378:metabolism* / Q000473:pathology*; D010316:Particle Size; D020442:Poloxamer / Q000633:toxicity*; D011100:Polyglycolic Acid / Q000737:chemistry; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D017550:Spectroscopy, Fourier Transform Infrared; D043823:Taxoids / Q000494:pharmacology
chemical_list: D003374:Coumarins; D043823:Taxoids; D020442:Poloxamer; D000077143:Docetaxel; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid