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Updated: Apr 14, 2026

Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes
Published on: July 23, 2016
Therapeutic applications of spherical nucleic acids
Stacey N Barnaby1, Timothy L Sita, Sarah Hurst Petrosko
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
Spherical nucleic acids (SNAs) are novel nanoparticle therapeutics. These SNA nanoparticles offer improved cellular entry, stability, and barrier penetration for potential cancer therapy and drug delivery applications.
Area of Science:
- Nanotechnology
- Biotechnology
- Therapeutics
Background:
- Spherical nucleic acids (SNAs) are an emerging class of nanoparticle-based therapeutics.
- SNAs feature densely functionalized oligonucleotides on inorganic or hollow nanoparticles.
- Their unique spherical structure offers advantages over traditional nucleic acid delivery.
Purpose of the Study:
- To explore the applications of SNAs in cancer therapy.
- To discuss multimodal SNAs for advanced drug delivery and imaging.
Main Methods:
- Focus on the structural characteristics of SNAs.
- Review SNA capabilities in cellular entry and biological barrier penetration.
- Summarize demonstrated efficacy in preclinical disease models.
Main Results:
- SNAs achieve cell entry independent of transfection agents.
- SNAs exhibit resistance to nuclease degradation.
- SNAs effectively penetrate biological barriers like the blood-brain and blood-tumor barriers.
- SNAs show therapeutic efficacy in murine models with minimal side effects.
Conclusions:
- SNAs represent a promising platform for cancer therapy and drug delivery.
- Multimodal SNAs offer potential for combined therapeutic and diagnostic applications.
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