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Related Concept Videos

siRNA - Small Interfering RNAs02:30

siRNA - Small Interfering RNAs

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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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Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also...
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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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Related Experiment Video

Updated: Apr 4, 2026

Porous Silicon Microparticles for Delivery of siRNA Therapeutics
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Published on: January 15, 2015

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Stimuli-Responsive Nanoparticles for siRNA Delivery.

Josimar O Eloy, Raquel Petrilli, Renata F V Lopez

  • 1College of Pharmacy, The Ohio State University, Columbus, 500 W 12th Ave, Columbus, OH 43210, USA. lee.1339@osu.edu.

Current Pharmaceutical Design
|September 2, 2015
PubMed
Summary

Smart nanoparticles offer controlled siRNA delivery for cancer treatment. These responsive materials release therapeutic agents on demand, improving outcomes and reducing side effects, though clinical use is pending.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Oncology

Background:

  • Nanoparticles are widely used for drug delivery, especially siRNA for cancer therapy.
  • Developing "smart" nanoparticles for triggered siRNA release is a key research area.
  • Stimuli-responsive nanoparticles offer potential for targeted and controlled drug delivery.

Purpose of the Study:

  • To review different classes of stimuli-responsive nanoparticles for siRNA delivery.
  • To highlight the applications and recent advancements in this field.
  • To discuss the potential of these nanoparticles in cancer treatment.

Main Methods:

  • Review of various nanoparticle types including polyplexes, lipoplexes, liposomes, micelles, and inorganic nanoparticles.
  • Analysis of stimuli-responsive mechanisms (pH, redox, light, temperature, etc.) for triggered siRNA release.
  • Discussion of in vitro and in vivo delivery studies.

Main Results:

  • Various stimuli can trigger siRNA release from designed nanoparticles.
  • Stimuli-responsive nanoparticles facilitate "on-demand" drug delivery.
  • These systems show promise for enhanced therapeutic outcomes and reduced side effects.

Conclusions:

  • Stimuli-responsive nanoparticles represent a promising platform for advanced siRNA therapeutics.
  • Further research and development are needed to translate these smart nanoparticles into clinical applications.
  • These nanoparticles offer a pathway to more effective and safer cancer treatments.