Related Experiment Video
Updated: Mar 26, 2026

Preparation of Neutrally-charged, pH-responsive Polymeric Nanoparticles for Cytosolic siRNA Delivery
Published on: May 2, 2019
Nanoparticle-mediated delivery of small RNA molecules in tumor therapy
Abstract:
In principle, RNA interference (RNAi) allows for the inhibition of any oncogene of choice, thus leading to novel concepts in tumor therapy. For their delivery, the RNAi-inducing small RNA molecules (small interfering RNAs, siRNAs) can be formulated in various nanoparticle systems, prior to testing them in preclinical animal models. The same is true for miRNAs that have more recently been explored in therapeutic miRNA replacement strategies. This puts high demands on the properties of the nanoparticles. This review article discusses various nanoparticulate systems for RNA delivery in vivo and gives an overview of preclinical studies on siRNA- or miRNA-based tumor therapy.
Insights
Nanoparticle delivery systems enable RNA interference (RNAi) therapies, including small interfering RNAs (siRNAs) and microRNAs (miRNAs), for targeted cancer treatment. This review covers nanoparticle properties and preclinical studies for effective RNA-based tumor therapy.
Area of Science:
- Biomedical Engineering
- Molecular Biology
- Oncology
Background:
- RNA interference (RNAi) offers a promising therapeutic strategy for inhibiting oncogenes in cancer.
- Small interfering RNAs (siRNAs) and microRNAs (miRNAs) are key molecules for RNAi-based cancer therapies.
- Effective delivery of these RNA molecules is crucial for successful tumor treatment.
Purpose of the Study:
- To review various nanoparticulate systems for in vivo RNA delivery.
- To provide an overview of preclinical studies utilizing siRNA- or miRNA-based tumor therapy.
- To highlight the importance of nanoparticle properties for therapeutic RNA delivery.
Main Methods:
- Literature review of nanoparticulate systems for RNA delivery.
- Analysis of preclinical studies on siRNA-based tumor therapy.
- Examination of preclinical studies on miRNA-based tumor therapy.
Main Results:
- Various nanoparticle systems are suitable for delivering RNAi molecules in vivo.
- Preclinical studies demonstrate the potential of siRNA and miRNA therapies in animal models.
- Nanoparticle characteristics significantly impact the efficacy of RNA-based cancer treatments.
Conclusions:
- Nanoparticle-formulated RNAi therapeutics hold significant promise for novel cancer treatment strategies.
- Further research into nanoparticle design is essential for optimizing in vivo RNA delivery and therapeutic outcomes.
- Preclinical evidence supports the advancement of siRNA and miRNA-based tumor therapies.
Related Concept Videos
siRNA - Small Interfering RNAs
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
Experimental RNAi
RNA Interference
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...
RNA Interference
Small interfering RNAs (siRNA)
MicroRNAs

