Enzyme and voltage stimuli-responsive controlled release system based on β-cyclodextrin-capped mesoporous silica nanoparticles

Dalton Trans. 2015 Mar 7;44(9):4355-61. doi: 10.1039/c4dt03758h.

Abstract

Enzyme and voltage stimuli are more biologically compatible in the field of stimuli-responsive systems and release systems based on β-cyclodextrin (CD) and ferrocene (Fc) have attracted much attention. Herein, mesoporous silica nanoparticles (MSNs) have been functionalized with the ferrocenyl moiety (Fc) which interacts with β-cyclodextrin (β-CD) to form an inclusion complex on the opening of the pores. The size of the inclusion complex results in a barrier to the opening of the pores. Based on these characteristics, MSNs with nanovalves have been developed as a release system. The release system shows a clear response to heme protein (horseradish peroxidase or hemoglobin) and H2O2, glucose oxidase (GOD) with horseradish peroxidase (HRP) and glucose, or +1.5 V based on an oxidation stimulus mechanism. Modulating the amount of enzyme or the discretion of the voltage makes the release system a controlled one.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Delayed-Action Preparations / chemistry
  • Drug Delivery Systems*
  • Drug Liberation
  • Electric Stimulation
  • Ferrous Compounds / chemistry*
  • Glucose / chemistry
  • Glucose Oxidase / chemistry
  • Hemoglobins / chemistry
  • Horseradish Peroxidase / chemistry
  • Hydrogen Peroxide / chemistry
  • Metallocenes
  • Nanoparticles / chemistry*
  • Porosity
  • Silicon Dioxide / chemistry*
  • beta-Cyclodextrins / chemistry*

Substances

  • Delayed-Action Preparations
  • Ferrous Compounds
  • Hemoglobins
  • Metallocenes
  • beta-Cyclodextrins
  • Silicon Dioxide
  • Hydrogen Peroxide
  • Glucose Oxidase
  • Horseradish Peroxidase
  • Glucose
  • betadex
  • ferrocene