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Hollow silica–polyelectrolyte composite nanoparticles for controlled drug delivery

  • Qingsong Yang
  • Li Li
  • Fang Zhao
  • Haoya Han
  • Weihua Wang
  • Yuchuan Tian
  • Yunwei Wang
  • Zhishuang Ye
  • Xuhong Guo
Materials for life sciences

Abstract

The stimulus-responsive drug delivery system has attracted increasing attention due to its ability to enhance therapeutic efficacy and reduce side effects. Herein, a pH and glutathione (GSH) dually responsive drug carrier, hollow silica–-polyelectrolyte composite nanoparticle, was successfully prepared by using a template of spherical polyelectrolyte brush (SPB) which consists of a polystyrene (PS) core and a densely grafted linear poly(acrylic acid) (PAA) shell. The existence of PAA chains and introduction of disulfide bonds in silica framework endow the composite nanoparticles with pH and GSH dually responsive properties which were confirmed by dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS). With doxorubicin hydrochloride (DOX) as the model drug, the loading content and encapsulation efficiency could reach up to 43% and 96%, respectively. The drug release behavior was investigated under various environments, showing that the drug release rate increased with the decrease in pH value and the increase in GSH concentration. The prepared hollow SiO2–PAA composite nanoparticles possess a great potential as carriers for controlled drug delivery.

Notes

Acknowledgements

We gratefully thank the financial support by the NSFC Grants (5171101370, 51773061 and 21476143) and 111 Project Grant (B08021). We also thank Shanghai Synchrotron Radiation Facility for its experimental support.

Compliance with ethical standards

Conflicts of interest

The authors declare no competing financial interest.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghaiPeople’s Republic of China
  2. 2.The Alle Chemical CompanyQingdaoPeople’s Republic of China
  3. 3.Engineering Research Center of Materials Chemical Engineering of Xinjiang BingtuanShihezi UniversityXinjiangPeople’s Republic of China

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