Related Experiment Video

Updated: May 9, 2026

Synthesis and Characterization of mRNA-Loaded Poly(Beta Aminoesters) Nanoparticles for Vaccination Purposes
08:27

Synthesis and Characterization of mRNA-Loaded Poly(Beta Aminoesters) Nanoparticles for Vaccination Purposes

Published on: August 13, 2021

Polymer-based delivery of RNA-based therapeutics in ovarian cancer

Ulrike Weirauch1, Daniela Gutsch, Sabrina Höbel

  • 1Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology University of Leipzig, Leipzig, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|August 6, 2013
PubMed

Insights

This study details using polyethylenimine (PEI) nanoparticles for delivering small interfering RNAs (siRNAs) and microRNAs (miRNAs) to enable therapeutic gene silencing and miRNA replacement therapy.

Area of Science:

  • Molecular Biology
  • Gene Therapy
  • Nanotechnology

Background:

  • RNA interference (RNAi) is a natural gene silencing process utilizing small interfering RNAs (siRNAs).
  • MicroRNAs (miRNAs) regulate gene expression by blocking mRNA translation; some are downregulated in cancer.
  • Effective delivery of therapeutic siRNAs/miRNAs via non-viral formulations is crucial.

Purpose of the Study:

  • To provide protocols for therapeutic gene silencing using siRNAs.
  • To offer methods for miRNA replacement therapy using miRNAs.
  • To utilize polyethylenimine (PEI) complexes in polymeric nanoparticles for efficient delivery.

Main Methods:

  • Complexation of siRNAs/miRNAs in PEI-based polymeric nanoparticles.
  • Development of protocols for in vitro and in vivo applications.
  • Ensuring nanoparticle-mediated protection, delivery, cellular uptake, and intracellular release.

Main Results:

  • PEI nanoparticles protect siRNAs/miRNAs from degradation.
  • Nanoparticles facilitate targeted delivery and cellular uptake.
  • Intracellular release mechanisms are optimized for therapeutic efficacy.

Conclusions:

  • PEI-complexed nanoparticles are effective non-viral vectors for RNAi-based therapies.
  • Protocols are established for both gene silencing and miRNA replacement in vitro and in vivo.
  • This approach holds promise for cancer therapy and other diseases involving gene dysregulation.

More Related Videos

Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?14:20

Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?

Published on: June 13, 2014

Preparation of Neutrally-charged, pH-responsive Polymeric Nanoparticles for Cytosolic siRNA Delivery09:09

Preparation of Neutrally-charged, pH-responsive Polymeric Nanoparticles for Cytosolic siRNA Delivery

Published on: May 2, 2019

Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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...
RNA Interference01:23

RNA 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...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...