Developing Push-Pull Hydroxylphenylpolyenylpyridinium Chromophores as Ratiometric Two-Photon Fluorescent Probes for Cellular and Intravital Imaging of Mitochondrial NQO1.
Anal Chem
; 93(4): 2385-2393, 2021 02 02.
Article
in En
| MEDLINE
| ID: mdl-33439630
ABSTRACT
This work highlights the use of push-pull hydroxylphenylpolyenylpyridinium fluorophores coupled with trimethyl lock quinone to engineer the ratiometric two-photon probes for cellular and intravital imaging of mitochondrial NAD(P)Hquinone oxidoreductase 1 (NQO1), a critical antioxidant enzyme responsible for detoxifying quinones. As a typical representative, QBMP showed favorable binding with NQO1 with a Michaelis constant of 12.74 µM and exhibited a suite of superior properties, including rapid response (4 min), large Stokes shift (162 nm), ultralow detection limit (0.9 nM), favorable two-photon cross section for the released fluorophore (70.5 GM), and deep tissue penetration (225 µm) in fixed brain tissues. More importantly, this probe was successfully applied for distinguishing different NQO1-expressing cancer and normal cells, revealing decreased NQO1 activity in a cellular Parkinson's disease model, screening NQO1 inducers as neuroprotective agents, and imaging of NQO1 in live mouse brain.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pyridinium Compounds
/
NAD(P)H Dehydrogenase (Quinone)
/
Fluorescent Dyes
/
Mitochondria
Type of study:
Diagnostic_studies
Limits:
Animals
/
Humans
Language:
En
Journal:
Anal Chem
Year:
2021
Document type:
Article