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Preparation, Administration, and Assessment of In Vivo Tissue-Specific Cellular Uptake of Fluorescent Dye-Labeled Liposomes
Published on: July 30, 2020
Size-dependant cellular uptake of dendritic polyglycerol
Stephanie Reichert1, Pia Welker, Marcelo Calderón
1Department of Biology, Chemistry, and Pharmacy, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany.
Small (Weinheim an Der Bergstrasse, Germany)
|February 22, 2011
Summary
Higher-molecular-weight hyperbranched polyglycerols (HPGs) show enhanced cytoplasmic accumulation in cancer and endothelial cells compared to lower-molecular-weight versions. This finding has implications for targeted drug delivery systems.
Area of Science:
- Polymer Chemistry
- Nanotechnology
- Cell Biology
Background:
- Hyperbranched polyglycerols (HPGs) are versatile polymers with potential biomedical applications.
- Understanding cellular internalization mechanisms is crucial for developing effective drug delivery systems.
Purpose of the Study:
- To design and synthesize amino-bearing HPGs of varying molecular masses.
- To investigate the cellular uptake mechanism and intracellular localization of HPGs in different cell lines.
Main Methods:
- Synthesis and fluorescent labeling of HPGs with indocarbocyanine dye (ICC-mal).
- Characterization using UV-vis spectroscopy, fluorescence, zeta potential, and dynamic light scattering.
- Cellular uptake studies via fluorescence-activated cell sorting (FACS), fluorescence spectroscopy, and confocal microscopy in A549, A431, and HUVEC cells.
Main Results:
- HPGs were successfully synthesized, labeled, and characterized.
- Higher-molecular-weight HPGs (40-870 kDa) demonstrated significantly better cytoplasmic accumulation than low-molecular-weight HPGs (2-20 kDa).
- Differential uptake was observed across human lung cancer (A549), epidermoid carcinoma (A431), and endothelial (HUVEC) cells.
Conclusions:
- Molecular weight is a critical factor influencing the intracellular fate of HPG nanocarriers.
- Higher-molecular-weight HPGs exhibit enhanced cytoplasmic accumulation, suggesting potential for improved drug delivery.
- These HPG nanocarriers hold promise for targeted therapeutic applications in oncology and vascular medicine.
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