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Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry

Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry

Published on: March 1, 2013

Self-assembled triangular DNA nanoparticles are an efficient system for gene delivery.

Yingming Wang¹, Zaichun You¹, Juan Du¹

¹Institute of Respiratory Diseases, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China.

Journal of Controlled Release : Official Journal of the Controlled Release Society

|May 19, 2016

Summary

Researchers developed novel triangular DNA nanoparticles (ssRNA-TNP) for efficient gene delivery. These RNA/DNA hybrid nanoparticles show enhanced stability and mTOR gene silencing, offering a promising nonviral delivery system.

Keywords:

DNA nanostructures Endocytosis Gene delivery Self-assembled Single-stranded siRNA

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Area of Science:

Biotechnology
Nanomedicine
Molecular Biology

Background:

Advanced nucleic acid drug delivery is crucial for effective gene therapy.
Self-assembled nucleic acid nanoparticles offer a versatile platform for drug and nucleic acid delivery.

Purpose of the Study:

To develop an efficient, stable, and nonviral gene delivery system using self-assembled nucleic acid nanoparticles.
To investigate the transfection efficiency and mechanism of novel triangular DNA nanoparticles loaded with single-stranded siRNA targeting mTOR.

Main Methods:

Construction of three-stranded, RNA/DNA hybrid triangular self-assembled nanoparticles (ssRNA-TNP) loaded with single-stranded siRNA targeting mTOR.
Assessment of ssRNA-TNP stability in complete medium compared to standard duplex siRNA.
Evaluation of ssRNA-TNP transfection efficiency in NCI-H292 cells in a dose- and time-dependent manner.
Investigation of cellular uptake pathways, including macropinocytosis and clathrin-mediated endocytosis.

Main Results:

ssRNA-TNP demonstrated superior stability in complete medium compared to standard duplex siRNA.
Efficient dose- and time-dependent transfection of ssRNA-TNP into NCI-H292 cells was observed.
Cellular uptake of ssRNA-TNP was found to be dependent on macropinocytosis and clathrin-mediated endocytosis.
ssRNA-TNP exhibited enhanced efficiency in inhibiting mTOR gene expression.

Conclusions:

The developed ssRNA-TNP presents a simpler structure, improved stability, and higher transfection efficiency for gene delivery.
This novel nonviral nanosystem holds significant potential for therapeutic gene delivery applications, particularly for targeting mTOR.
Further research into ssRNA-TNP could advance the field of nucleic acid-based therapeutics.