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Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
Published on: April 3, 2014
Internalization of nucleoside phosphates into live cells by complex formation with different CPPs and JBS-nucleoducin
Franziska Mussbach1, Regina Pietrucha, Buerk Schaefer
1Faculty of Biology and Pharmacy, Friedrich-Schiller-University, Jena, Germany.
Methods in Molecular Biology (Clifton, N.J.)
|November 6, 2010
Summary
Cellular uptake of deoxyuridine triphosphate was achieved using cell-penetrating peptides (CPPs). However, CPPs and nucleotide complexes show cytotoxicity, limiting cargo delivery efficiency.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Nucleoside phosphates are crucial for cellular signaling and translation.
- Efficient intracellular delivery of nucleoside phosphates remains a significant challenge.
- G-protein coupled receptors and GTP-binding proteins are key targets.
Purpose of the Study:
- To investigate the internalization of fluorescently labeled deoxyuridine triphosphate into various cell types.
- To evaluate the efficacy of cell-penetrating peptides (CPPs) and non-covalent complexation for nucleotide delivery.
- To assess the safety and limitations of CPP-mediated delivery systems.
Main Methods:
- Utilized fluorescence microscopy to observe nucleotide internalization.
- Employed fluorescence spectroscopy for quantitative uptake efficiency analysis.
- Assessed cell viability using MTT assays and membrane integrity via bioluminescence tests.
Main Results:
- Successful internalization of deoxyuridine triphosphate was observed in HeLa and other cell lines.
- Different cell-penetrating peptides (CPPs) demonstrated varying efficiencies in facilitating nucleotide uptake.
- Cytotoxicity was observed for both CPPs and nucleotide complexes above specific concentrations, dependent on CPP and cell type.
Conclusions:
- Cell-penetrating peptides (CPPs) can mediate the internalization of deoxyuridine triphosphate into cells.
- Cytotoxicity of CPPs and their complexes with nucleotides presents a critical limitation for intracellular delivery.
- Optimizing CPP concentration and type is essential for safe and effective nucleotide cargo delivery.
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