Related Experiment Video
Updated: Oct 6, 2025
09:02
Author Spotlight: Innovative Cancer Therapies with Iron Oxide Nanoparticles for Glioblastoma Treatment
Published on: September 27, 2024
2.8K
Self-Tracking Multifunctional Nanotheranostics for Sensitive miRNA Imaging Guided Photodynamic Therapy
Xiangnan Wang1, Yueyan Yuan1, Zhenkun Wu1
1State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
ACS Applied Bio Materials
|January 13, 2022
Summary
This study introduces a novel nanotherapeutic system using graphitic carbon nitride (g-C3N4) nanosheets for sensitive miRNA detection and photodynamic therapy. The system enables self-tracking and amplified biomarker detection in living cells.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Molecular Imaging
Background:
- Theranostic systems are crucial for monitoring drug delivery and detecting low-abundance biomarkers in bioimaging and biomedicine.
- Sensitive detection of microRNAs (miRNAs) is vital for early disease diagnosis and targeted therapies.
- Existing methods often face challenges with signal amplification and monitoring delivery efficiency.
Purpose of the Study:
- To develop a self-tracking, multifunctional nanotherapeutic system for miRNA-guided photodynamic therapy.
- To utilize graphitic carbon nitride (g-C3N4) nanosheets as both a nanocarrier and a photosensitizer.
- To achieve sensitive miRNA imaging and monitor transfection efficiency in living cells.
Main Methods:
- Fabrication of graphitic carbon nitride (g-C3N4) nanosheet-based nanotheranostics (g-C3N4@H1/H2).
- Utilizing an intracellular hybridization chain reaction for amplified miRNA imaging.
- Employing g-C3N4 nanosheets as photosensitizers for photodynamic therapy.
- Assessing transfection efficiency using fluorescent g-C3N4 nanosheets.
- Conducting in vitro and live cell studies to evaluate imaging and therapeutic efficacy.
Main Results:
- The g-C3N4 nanosheet system demonstrated high signal amplification efficiency for miRNA detection.
- Live cell studies showed successful differentiation of miRNA expression levels between tumor and normal cells.
- The nanotheranostics exhibited effective photodynamic therapy, confirmed by cell viability assays.
- Fluorescent g-C3N4 nanosheets enabled reliable monitoring of transfection efficiency, reducing false negatives.
Conclusions:
- The developed self-tracking multifunctional nanotheranostics offer a promising platform for sensitive biomarker detection.
- This system holds significant potential for imaging-guided photodynamic therapy in living cells.
- The combined capabilities of imaging, therapy, and self-tracking represent a significant advancement in theranostic nanomedicine.
