Acid and light stimuli-responsive mesoporous silica nanoparticles for controlled release
Source abstract
Abstract
We constructed a novel stimuli-responsive system, MSNPs 1, based on mechanized silica nanoparticles, in which mesoporous silica nanoparticles (MSNs) acted as nanocontainers to load cargo, and supramolecular switches consisting of hydrazone bond, azobenzene and α-cyclodextrin (α-CD) realized the controlled release of cargo molecules from MSNPs 1. In neutral solution and without UV light irradiation, the azobenzene component on functional stalks was in trans form, and combined with α-CD to block the mesoporous channels and prevent the cargo from escaping. Upon adjusting the solution pH to acid range, the acid-sensitive hydrazone bonds rapidly hydrolyzed, resulting in the disconnection between pseudorotaxanes and MSNs. The encapsulated cargo molecules were released simultaneously from MSNPs 1 due to the removal of supramolecular switches. On the other hand, when the neutral solution was irradiated with UV light at 365 nm, trans-azobenzene converted to cis, disassociating with α-CD to activate the switches and release the cargo. The unique acid- and light-triggered controlled release properties of MSNPs 1 have potential application in various fields. In this manuscript, doxorubicin (DOX) was selected to be stored in MSNPs 1, due to the anticancer property. MCF-7 human breast cancer cells could phagocytose DOX-loaded MSNPs 1 easily, and the released DOX showed the killing effect.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoparticle-Based Drug Delivery · Supramolecular Chemistry and Complexes · Dendrimers and Hyperbranched Polymers
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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