Abstract
Multifunctional stimuli-responsive nanotheranostic systems are highly desirable for realizing simultaneous biomedical imaging and on-demand therapy with minimized adverse effects. Herein, we present the construction of an intelligent X-ray-controlled NO-releasing upconversion nanotheranostic system (termed as PEG-USMSs-SNO) by engineering UCNPs with S-nitrosothiol (R-SNO)-grafted mesoporous silica. The PEG-USMSs-SNO is designed to respond sensitively to X-ray radiation for breaking down the S-N bond of SNO to release NO, which leads to X-ray dose-controlled NO release for on-demand hypoxic radiosensitization besides upconversion luminescent imaging through UCNPs invitro and invivo. Thanks to the high live-body permeability of X-ray, our developed PEG-USMSs-SNO may provide a new technique for achieving depth-independent controlled NO release and positioned radiotherapy enhancement against deep-seated solid tumors.
| Original language | English |
|---|---|
| Pages (from-to) | 14026-14030 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 54 |
| Issue number | 47 |
| DOIs | |
| State | Published - 16 Nov 2015 |
| Externally published | Yes |
Keywords
- NO release
- X-ray radiation
- hypoxic radiosensitization
- luminescent imaging
- on-demand therapy