Tumor Microenvironment-Activatable Phototheranostic: Leveraging Nitric Oxide and Weak Acidity as Dual Biomarkers for Ratiometric Fluorescence, Photoacoustic Imaging, and Photothermal Therapy.
Anal Chem
; 96(21): 8689-8695, 2024 05 28.
Article
in En
| MEDLINE
| ID: mdl-38748889
ABSTRACT
Tumor microenvironment-responsive phototheranostic agents are highly sought after for their ability to improve diagnostic accuracy and treatment specificity. Here, we introduce a novel single-molecule probe, POZ-NO, which is activated by nitric oxide (NO) and weak acidity, enabling dual-mode imaging and photothermal therapy (PTT) of tumors. In acidic environments with elevated NO levels, POZ-NO exhibits a distinctive ratiometric fluorescence signal shift from the red to near-infrared, accompanied by a 700 nm photoacoustic signal. Additionally, POZ-NO demonstrated potent photothermal effects upon NO and acidity activation, achieving an impressive conversion efficiency of 74.3% under 735 nm laser irradiation. In vivo studies confirm POZ-NO's ability to accurately image tumors through ratiometric fluorescence and photoacoustic modes while selectively treating tumors with PTT.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Tumor Microenvironment
/
Photoacoustic Techniques
/
Photothermal Therapy
/
Nitric Oxide
Limits:
Animals
/
Female
/
Humans
Language:
En
Journal:
Anal Chem
Year:
2024
Type:
Article
Affiliation country:
China