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Related Concept Videos

Experimental RNAi02:15

Experimental 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...
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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.
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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.
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Small interfering RNAs (siRNA)02:30

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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.
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Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes
10:33

Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes

Published on: July 23, 2016

Peptide mediated siRNA delivery.

Mousa Jafari1, P Chen

  • 1Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada.

Current Topics in Medicinal Chemistry
|October 29, 2009
PubMed
Summary
This summary is machine-generated.

RNA interference (RNAi) gene therapy faces challenges with naked small interfering RNA (siRNA) delivery. Cationic peptides offer a promising solution for enhanced stability and cell membrane translocation, improving gene silencing efficiency.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Gene Therapy

Background:

  • RNA interference (RNAi) is a powerful gene silencing tool with therapeutic potential.
  • Naked small interfering RNA (siRNA) exhibits poor stability and cellular uptake, hindering its application.
  • Effective delivery systems are crucial for advancing siRNA-based gene therapies.

Purpose of the Study:

  • To review various peptide-based delivery systems for small interfering RNA (siRNA).
  • To introduce a novel class of cationic peptides for efficient and safe siRNA delivery.
  • To highlight peptides with high transfection efficiency and low cytotoxicity for gene therapy.

Main Methods:

  • Literature review of existing peptide-based siRNA delivery strategies.
  • Analysis of peptide characteristics, including structure, function, biocompatibility, and targeting capabilities.
  • Introduction and discussion of a newly identified class of siRNA delivery peptides.

Main Results:

  • Cationic peptides demonstrate versatility, biocompatibility, and cell-targeting potential for siRNA delivery.
  • Several classes of peptides have been explored for their efficacy in delivering siRNA.
  • A new class of peptides exhibits high transfection efficiency and low cytotoxicity.

Conclusions:

  • Peptide-based delivery systems are essential for overcoming the limitations of naked siRNA.
  • The reviewed peptides offer improved stability and cellular translocation for gene therapy applications.
  • The newly introduced peptide class represents a significant advancement in developing safe and effective siRNA delivery vehicles.