Temperature and pH dually-responsive poly(β-amino ester) nanoparticles for drug delivery

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• 作者：Xiao-ju Lu 卢小菊 ; Xiang-yu Yang ; Yuan Meng…
• 关键词：Temperature ; sensitive ; pH ; sensitive ; Nanoparticles ; Drug delivery
• 刊名：Chinese Journal of Polymer Science
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：35
• 期：4
• 页码：534-546
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials; Condensed Matter Physics;
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS
• ISSN：1439-6203
• 卷排序：35

文摘

Stimuli-responsive polymers have undoubtedly been of great interest in the past decades due to a variety of their potential applications in biomedical territory. However, their non-degradability limits their in vivo applications. Herein, we report a novel pH and temperature dual-stimuli responsive-poly(β-amino ester). The pH/temperature sensitivities are interrelated and can be easily tuned by changing PEG-diacrylate chain length and the percentage of biamines in the feed ratio. These dual-responsive polymers are very useful in drug delivery. Reaction of methyl ether poly(ethylene glycol) (MPEG) and poly(β-amino ester) resulted in an amphiphilic MPEG-PBAE block copolymer which could form nanoparticles by self-assembly. A hydrophobic drug (DOX) was loaded in the self-assembled nanoparticles at low temperature without using organic solvents. The loaded drug was released very slowly and steadily at 37 °C under physiological conditions (pH 7.4), but rapidly released from the micelles in weakly acidic environments (pH 6.4 and 5.0) for intracellular drug release. Thus, these poly(β-amino ester) polymers constitute ideal drug carriers since their thermal sensitivity allows the drug loadings without using organic solvent and their pH sensitivity permits fast intracellular drug release.