Abstract
Elevated hydrogen sulfide (H 2 S) level is closely associated with various diseases. So the sensing of H 2 S is noteworthy for divulging its role in diagnosing these diseases. Herein, we proposed poly(acrylic acid)-modified upconversion nanoparticles assembled with cationic near-infrared cyanine chromophores (Cy7-Cl) as the nanoprobe (Cy7-UCNPs) for monitoring H 2 S based on thiolation reactions. The presence of H 2 S resulted into about five-fold enhancement in the luminescence intensity of Cy7-UCNPs and the nanoprobe showed a good linearity (R 2 =0.9952) over the range of 1.0 − 90 μM. Furthermore, Cy7-UCNPs were successfully employed in sensing and imaging of exogenous and endogenous H 2 S in live cells and zebrafish. The system shows great potential in the field of nanobiomedicine because of the many excellent properties including high sensitivity, good selectivity, and low cytotoxicity.
| Original language | English |
|---|---|
| Pages (from-to) | 96-101 |
| Number of pages | 6 |
| Journal | Biosensors and Bioelectronics |
| Volume | 126 |
| DOIs | |
| State | Published - 1 Feb 2019 |
Keywords
- Bioimaging
- Chromophore
- Hydrogen sulfide (H S)
- Turn-on fluorescent probe
- Upconversion nanoparticles