Tumor Microenvironment Stimuli-Responsive Polymeric Prodrug Micelles for Improved Cancer Therapy.

Abstract:

PURPOSE:The discovery of nano drug delivery system has rendered a great hope for improving cancer therapy. However, there are some inevitable obstacles that constrain its development, such as the physical and biological barriers, the toxicity of carrier materials and the physiological toxicity of drugs. Here, we report a polymeric prodrug micelle (PPM) with pH/redox dual-sensitivity, which was prepared using methoxy poly (ethylene glycol) (mPEG) with favorable biosafety to improve cancer therapy. METHOD:The tumor microenvironment stimuli-responsive PPMs were prepared and characterized in vitro and in vivo. RESULTS:Our data displayed that the PPMs with excellent biocompatibility exhibited the stimuli-responsive drug release behavior under the microenvironment of cancer cells, superior cellular internalization and lower cytotoxicity. A new method to control drug release behavior was proposed by comparing the release behavior of PPMs formed by PEG of different molecular weight. Furthermore, the fabricated PPMs exhibited the "oral-like" blood concentration curve, improved biodistribution, reduced tissue toxicity and excellent antitumor efficiency in vivo. Consistently, these results indicated that PPMs improved chemotherapeutic efficiency and reduced side effects of the model drug doxorubicin (DOX). CONCLUSION:The prepared pH/redox dual-sensitive PPM enhanced the chemotherapy effect on the tumor site while reducing the physiological toxicity of DOX. Graphical Abstract.

journal_name

Pharm Res

journal_title

Pharmaceutical research

authors

Zhang Z,Yu M,An T,Yang J,Zou M,Zhai Y,Sun W,Cheng G

doi

10.1007/s11095-019-2709-1

subject

Has Abstract

pub_date

2019-12-10 00:00:00

pages

4

issue

1

eissn

0724-8741

issn

1573-904X

pii

10.1007/s11095-019-2709-1

journal_volume

37

pub_type

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