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Updated: Jul 8, 2026
08:36
Chitosan/Interfering RNA Nanoparticle Mediated Gene Silencing in Disease Vector Mosquito Larvae
Published on: March 25, 2015
RNA interference in vitro and in vivo using a novel chitosan/siRNA nanoparticle system
Kenneth A Howard1, Ulrik L Rahbek, Xiudong Liu
1Interdisciplinary Nanoscience Center (iNANO), University of Aarhus, 8000 Aarhus C, Denmark.
Summary
This study presents a novel chitosan nanoparticle system for delivering small interfering RNA (siRNA) to effectively silence genes in cells and living organisms, paving the way for new RNA interference therapies.
Area of Science:
- Biotechnology
- Nanotechnology
- Molecular Biology
Background:
- RNA interference (RNAi) is a powerful gene silencing tool.
- Efficient and safe delivery of small interfering RNA (siRNA) remains a challenge for therapeutic applications.
Purpose of the Study:
- To develop and characterize a novel chitosan-based nanoparticle system for siRNA delivery.
- To evaluate the in vitro and in vivo efficacy of this system for gene silencing.
Main Methods:
- Formation of chitosan/siRNA nanoparticles characterized by atomic force microscopy and photon correlation spectroscopy.
- In vitro gene silencing assessed in H1299 lung carcinoma cells and murine macrophages using enhanced green fluorescent protein (EGFP) as a reporter.
- In vivo gene silencing evaluated in transgenic EGFP mice via nasal administration.
Main Results:
- Chitosan/siRNA nanoparticles were successfully formed, with sizes ranging from 40 to 600 nm.
- Rapid cellular uptake and significant knockdown of EGFP (up to 89.3%) and BCR/ABL-1 (approx. 90%) were observed in vitro.
- Effective in vivo RNA interference was achieved in mouse bronchiole epithelial cells.
Conclusions:
- The developed chitosan-based siRNA nanoparticles demonstrate efficient gene silencing in vitro and in vivo.
- This system holds significant potential for RNA-mediated therapy of various diseases.
- Further development could lead to novel treatments for systemic and mucosal conditions.
Related Concept Videos
01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
01:23RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
02:30siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
02:15Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
02:30Small interfering RNAs (siRNA)
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...