Paclitaxel-loaded Pluronic nanoparticles formed by a temperature-induced phase transition for cancer therapy

Keun Sang Oh, Ji Yung Song, Sun Hang Cho, Bum Suk Lee, Sang Yoon Kim, Kwangmeyung Kim, Hyesung Jeon, Ick Chan Kwon, Soon Hong Yuk

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)


We prepared nanoparticles by a temperature-induced phase transition in a mixture of Pluronic F-68 and liquid PEG (polyethylene glycol, molecular weight: 400) containing paclitaxel (PTX) with a fast, simple, continuous and solvent-free process. The liquid PEG is used as solubilizer of PTX and the polymer for the encapsulation of PTX is composed of Pluronic F-68. At the phase transition temperature, the polymer mixture was changed to the liquid phase, and stirring the liquid polymer mixture formed emulsions composed of PEG containing PTX and liquidized Pluronic F-68. On the nanometer scale, PEG containing PTX was encapsulated by Pluronic F-68 by cooling to 0 °C to form Pluronic nanoparticles. The morphology and size distribution of the prepared Pluronic nanoparticles were observed using FE-SEM and TEM, and a particle size analyzer and cryo-TEM were used to observe the shape of paclitaxel-loaded Pluronic nanoparticles in an aqueous state. To apply Pluronic nanoparticles as a delivery system for cancer therapy, the release pattern of PTX, a model anti-cancer drug, was observed and the tumor growth was monitored by injecting the PTX-loaded Pluronic nanoparticles into the tail veins of tumor-bearing mice. We also evaluated the time-dependent excretion profile, in vivo biodistribution, circulation time, and tumor targeting ability of PTX-loaded Pluronic nanoparticles using non-invasive live animal imaging technology. In the early stage within 7 h of release, the loaded PTX was rapidly released and the sustained release was observed for up to 48 h. In vivo studies, PTX-loaded Pluronic nanoparticles were observed with higher anti-tumor efficacy compared with PTX formulated in Cremophor EL.

Original languageEnglish
Pages (from-to)344-350
Number of pages7
JournalJournal of Controlled Release
Issue number3
Publication statusPublished - 2010 Dec 20
Externally publishedYes

Bibliographical note

Funding Information:
This work was financially supported by the Ministry of Science and Technology ( 2009K001600 , 2009K001602 , and 2009K001593 ) and by a grant from the fundamental R&D program for core technology of materials funded by the Ministry of Knowledge Economy ( K00060-282 ), Republic of Korea.


  • Anti-tumor efficacy
  • Cancer therapy
  • Non-invasive animal imaging
  • Pluronic nanoparticles
  • Temperature-induced phase transition

ASJC Scopus subject areas

  • Pharmaceutical Science


Dive into the research topics of 'Paclitaxel-loaded Pluronic nanoparticles formed by a temperature-induced phase transition for cancer therapy'. Together they form a unique fingerprint.

Cite this