Fluorescently labeled branched polymers and thermal responsive nanoparticles for live cell imaging
Di Zhou1, Yujie Ma, André A Poot
1Department of Polymer Chemistry and Biomaterials, MIRA Institute for Biomedical Technology and Technical Medicine, Faculty of Science and Technology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands.
Macromolecular Bioscience
|April 13, 2012
Summary
Novel fluorescent polymers were developed using RAFT polymerization. These biocompatible polymers form nanoparticles at body temperature, enabling efficient in vitro and in vivo bioimaging applications.
Area of Science:
- Polymer Chemistry
- Biomaterials Science
- Nanotechnology
Background:
- Development of advanced fluorescent probes is crucial for biological imaging.
- Thermoresponsive polymers offer unique opportunities for targeted delivery and imaging.
- RAFT polymerization provides precise control over polymer architecture.
Purpose of the Study:
- To synthesize and characterize novel fluorescently labeled polymers.
- To investigate the self-assembly of these polymers into nanoparticles.
- To evaluate their potential as biocompatible bioprobes for in vitro and in vivo imaging.
Main Methods:
- Synthesis of branched poly(methoxy-PEG acrylate) and block copolymers via RAFT polymerization.
- Fluorescent labeling of polymers using N-(5-fluoresceinyl)maleimide.
- Dynamic Light Scattering (DLS) for nanoparticle size analysis.
- In vitro imaging of Human Umbilical Vein Endothelial Cells (HUVECs).
- In vivo imaging using chick embryo Chorioallantoic Membrane (CAM) model.
Main Results:
- Successful synthesis of fluorescently labeled poly(methoxy-PEG acrylate) and block copolymers.
- Demonstrated temperature-dependent nanoparticle formation of the block copolymer at 37 °C.
- Effective bioimaging of HUVECs in vitro and CAM in vivo using the labeled materials.
- Confirmed biocompatibility of both the labeled polymer and its nanoparticle form.
Conclusions:
- Fluorescently labeled, thermoresponsive block copolymers can self-assemble into biocompatible nanoparticles.
- These nanoparticles serve as efficient fluorescent bioprobes for both in vitro and in vivo imaging.
- The developed materials hold promise for advanced biomedical imaging applications.
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