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Related Concept Videos

siRNA - Small Interfering RNAs02:30

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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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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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Liposomes as siRNA delivery vectors.

Sabrina Bochicchio, Annalisa Dalmoro, Anna Angela Barba

  • 1Dipartimento di Farmacia, Universita degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA) - Italy. aabarba@unisa.it.

Current Drug Metabolism
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Summary

Nucleic Acid Based Drugs (NABDs), like short interfering RNAs (siRNAs), show therapeutic promise but face delivery challenges. Liposomes offer a potential solution as drug delivery systems (DDSs) to improve siRNA stability and permeability.

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Area of Science:

  • Biotechnology
  • Nanomedicine
  • Pharmacology

Background:

  • Nucleic Acid Based Drugs (NABDs) are emerging therapeutics with potential against diseases like cancer.
  • Short interfering RNAs (siRNAs) are potent NABDs but suffer from poor stability and membrane permeability.
  • Liposomes are versatile drug delivery systems (DDSs) with tunable properties for enhanced drug delivery.

Purpose of the Study:

  • To review the current advancements in siRNA therapeutics.
  • To explore the role of liposomes as drug delivery systems for siRNAs.
  • To summarize the integration of siRNAs and liposomes for improved therapeutic outcomes.

Main Methods:

  • Literature review of nucleic acid-based drugs and liposome technology.
  • Analysis of siRNA stability and permeability challenges.
  • Evaluation of liposome characteristics for drug loading and transfection efficiency.

Main Results:

  • siRNAs demonstrate high efficacy in vitro but face significant in vivo delivery hurdles.
  • Liposomes can be engineered to protect siRNAs and facilitate their cellular uptake.
  • Tailored liposomes can optimize siRNA loading, vesicle size, and transfection yield.

Conclusions:

  • Combining siRNAs with liposomes offers a promising strategy to overcome delivery limitations.
  • Liposome-based drug delivery systems can enhance the therapeutic potential of siRNAs.
  • Further research into optimized liposome formulations is crucial for clinical translation.