What question did this study set out to answer?

To evaluate the effect of NaCl concentration on the binding mode of poly-L-lysine to DNA and assess the structural and functional properties of the resulting condensed complexes.

September 1, 2001Journal of Biological ChemistryOpen Access

Biological Properties of Poly-l-lysine-DNA Complexes Generated by Cooperative Binding of the Polycation

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Authors

GLGe LiuShenzhen University MMMaria MolasUniversitat Autònoma de Barcelona GGGregory A. GrossmannUniversity School

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Implication

In vitro study reveals that cooperative poly-l-lysine binding condenses DNA into nanospheres for targeted uptake in hepatoma cells, indicating the importance of particle shape in gene delivery.

Key Points

To evaluate the effect of NaCl concentration on the binding mode of poly-L-lysine to DNA and assess the structural and functional properties of the resulting condensed complexes.
Analyzed poly-L-lysine-DNA interactions across varying NaCl concentrations using DNA precipitation assays, DNase I digestion resistance, and electron microscopy.
Assayed receptor-mediated transfection efficiency in HuH-7 human hepatoma cells using galactosylated poly-L-lysine-DNA complexes in the presence and absence of asialofetuin competition.
Cooperative binding occurred within a narrow, polycation-length-dependent NaCl range, producing spherical condensed particles 15–30 nm in diameter that conferred DNase I resistance.
At low NaCl concentrations, poly-L-lysine bound noncooperatively and randomly across the DNA population.
Targeted gene transfer in HuH-7 cells required spherical 15–30 nm particles and was inhibited by up to 90% with asialofetuin.

Cite This Study

Liu et al. (2001) studied this question.

synapsesocial.com/papers/6a8580e1fc70cb81dc202cf6 https://doi.org/10.1074/jbc.m105250200

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Implication

In vitro study reveals that cooperative poly-l-lysine binding condenses DNA into nanospheres for targeted uptake in hepatoma cells, indicating the importance of particle shape in gene delivery.

Biological Properties of Poly-l-lysine-DNA Complexes Generated by Cooperative Binding of the Polycation

Discussion

Member takes

Implication

Key Points

Cite This Study

Biological Properties of Poly-l-lysine-DNA Complexes Generated by Cooperative Binding of the Polycation

Discussion

Member takes

Implication

Key Points

Cite This Study

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