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Cell response to dextran-derivatised iron oxide nanoparticles post internalisation.
Catherine Cecilia Berry1, Stephen Wells, Stuart Charles
1Centre for Cell Engineering, University of Glasgow, Joseph Black Building, IBLS University Avenue, Glasgow G12 8QQ, UK. catherine.berry @bio.gla.ac.uk
Biomaterials
|May 8, 2004
Summary
Dextran-coated magnetic nanoparticles, used as MRI contrast agents, alter human fibroblast behavior differently than uncoated particles. Cell response depends on the nanoparticle coating, influencing their in vitro effects.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cell Biology
Background:
- Magnetic nanoparticles are established MRI contrast agents.
- Dextran-coated iron oxide nanoparticles are in clinical use.
- Limited data exists on the in vitro cellular effects of these nanoparticles.
Purpose of the Study:
- To compare the in vitro effects of dextran-derivatized magnetic nanoparticles with uncoated particles.
- To investigate cell-particle interactions using human dermal fibroblasts.
- To determine if particle coating influences cellular response.
Main Methods:
- Synthesis and derivatization of magnetic nanoparticles with dextran.
- In vitro assessment using human dermal fibroblasts.
- Microscopic analysis (light, fluorescence, SEM, TEM) of cell-particle interactions.
Main Results:
- Both uncoated and dextran-derivatized magnetic nanoparticles were internalized by fibroblasts.
- Dextran-derivatized particles induced distinct changes in cell behavior and morphology compared to uncoated particles.
- Cellular response was dependent on the nanoparticle coating.
Conclusions:
- The coating of magnetic nanoparticles significantly influences their interaction with and effects on human dermal fibroblasts in vitro.
- Understanding these coating-dependent cellular responses is crucial for the safe and effective use of magnetic nanoparticles in biomedical applications, particularly as MRI contrast agents.
