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Related Concept Videos

RNA Interference01:23

RNA Interference

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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.
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...
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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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Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
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RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
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Transient Expression of Proteins by Hydrodynamic Gene Delivery in Mice
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Hepatic RNA Interference: Delivery by Synthetic Vectors.

Matthew Haynes1, Leaf Huang1

  • 1The Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill NC 27599, USA.

Drug Delivery and Translational Research
|March 29, 2014
PubMed
Summary

RNA interference (RNAi) therapeutics show promise for genetic diseases. Synthetic vectors enhance RNA drug delivery to the liver, improving treatment efficacy and long-term prospects for RNA-based therapies.

Keywords:
hepaticin vivolivernanoparticlesiRNAtherapy

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Drug Delivery

Background:

  • RNA interference (RNAi) technology, despite initial hype, shows renewed clinical promise for genetic disorders.
  • Current RNA therapeutics require improved strategies for targeted delivery and development.
  • Hepatic targeting is crucial for effective RNA-based treatments.

Purpose of the Study:

  • To review advancements in synthetic vectors for hepatic targeting of RNA therapeutics.
  • To discuss how organ and cellular physiology influence the design of RNA delivery systems.
  • To highlight the synergy between synthetic formulation and oligonucleotide development.

Main Methods:

  • Review of current literature on synthetic vectors for RNA delivery.
  • Analysis of physiological factors impacting conjugate structure and particle morphology.
  • Examination of active targeting strategies for hepatic cells.

Main Results:

  • Synthetic vectors demonstrate significant improvements in RNA drug delivery and efficacy.
  • Formulation strategies are critical for overcoming biological barriers in hepatic targeting.
  • Successful application in various disease models, including amyloidosis and muscular dystrophy.

Conclusions:

  • Synthetic vector technology is vital for the success of RNA therapeutics.
  • Enhanced hepatic delivery via synthetic formulations stabilizes the future of RNA drug development.
  • Continued innovation in RNAi delivery systems is essential for treating genetic diseases.