Suppressing ROS Production of AIE Nanoprobes by Simple Matrices Optimization for CNS Cell Observation and Minimized Influence of Cytoskeleton Morphology.

Chem Biomed Imaging

Institute of Engineering Medicine, School of Medical Technology, Beijing Key Laboratory for Separation and Analysis in Biomedicine and Pharmaceuticals, Beijing Institute of Technology, Beijing, 100081 P. R. China.

Published: November 2024

AI Article Synopsis

  • * By encapsulating DTF with various amphiphilic matrices to create AIE nanoprobes, they found that BSA@DTF nanoparticles provided greater brightness while significantly reducing ROS generation to just 2.4% of other probes.
  • * BSA@DTF NPs demonstrated the ability to maintain normal cellular function during live cell imaging, proving to be effective for long-term fluorescent imaging of CNS cells without damaging neuronal and microglial cells.

Article Abstract

The visualization of the central nervous system (CNS) has proposed stringent criteria for fluorescent probes, as the inevitable production of reactive oxygen species (ROS) or heat generated from most photoluminescent probes upon excitation can disturb the normal status of relatively delicate CNS cells. In this work, a red-emitting fluorogen with aggregation-induced emission (AIE) characteristics, known as DTF, was chosen as the model fluorogen to investigate whether the side effects of ROS and heat could be suppressed through easy-to-operate processes. Specifically, DTF was encapsulated with different amphiphilic matrices to yield AIE nanoprobes, and their photoluminescent properties, ROS production, and photothermal conversion rates were examined. BSA@DTF NPs possessed 1.3-fold brightness compared to that of DSPE-PEG@DTF NPs and F127@DTF NPs but its ROS generation efficiency is markedly decreased to only 2.4% of that produced by F127@DTF NPs. Meanwhile, BSA@DTF NPs showed a negligible photothermal effect. These features make BSA@DTF NPs favorable for long-term live cell imaging, particularly for fluorescent imaging of CNS cells. BSA@DTF NPs were able to sustain the normal state of HT-22 neuronal cells with continuous illumination for at least 25 min, and they also preserved the cytoskeleton of microglia BV-2 cells as the untreated control group. This work represents a successful but easy-to-operate process to suppress the ROS generation of red-emissive AIEgen, and it highlights the importance of minimizing the ROS generation of the fluorescent probes, particularly in the application of long-term imaging of CNS cells.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11600148PMC
http://dx.doi.org/10.1021/cbmi.4c00061DOI Listing

Publication Analysis

Top Keywords

bsa@dtf nps
16
cns cells
12
ros generation
12
ros production
8
aie nanoprobes
8
fluorescent probes
8
ros heat
8
f127@dtf nps
8
imaging cns
8
nps
7

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!