Molecular design of biodegradable polymeric micelles for temperature-responsive drug release

Masamichi Nakayama, Teruo Okano*, Takanari Miyazaki, Fukashi Kohori, Kiyotaka Sakai, Masayuki Yokoyama


研究成果: Article査読

320 被引用数 (Scopus)


We designed thermo-responsive and biodegradable polymeric micelles for an ideal drug delivery system whose target sites are where external stimuli selectively release drugs from the polymeric micelles. The thermo-responsive micelles formed from block copolymers that were composed both of a hydrophobic block and a thermo-responsive block. Poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide) showing a lower critical solution temperature (LCST) around 40 °C was synthesized for the thermo-responsive block, while biodegradable poly(d,l-lactide), poly(ε-caprolactone), or poly(d,l-lactide-co-ε-caprolactone) was used for the hydrophobic block. By changing both the block lengths of the poly(d,l-lactide)-containing block copolymers, physical parameters such as micelle diameter and critical micelle concentration were varied. On the other hand, the choice of the hydrophobic block was revealed to be critical in relation to both on the thermo-responsive release of the incorporated anti-cancer drug, doxorubicin, and the temperature-dependent change of the hydrophobicity of the micelles' inner core. One polymeric micelle composition successfully exhibited rapid and thermo-responsive drug release while possessing a biodegradable character.

ジャーナルJournal of Controlled Release
出版ステータスPublished - 2006 9月 28

ASJC Scopus subject areas

  • 薬科学


「Molecular design of biodegradable polymeric micelles for temperature-responsive drug release」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。