Poly-sgRNA/siRNA ribonucleoprotein nanoparticles for targeted gene disruption

Area of Science:

• Molecular Biology
• Biotechnology
• Gene Editing Technologies

Background:

• CRISPR-Cas9 is a powerful genome-editing tool for gene disruption and correction.
• Efficient intracellular delivery of CRISPR-Cas9 systems is crucial for biomedical applications.
• Current delivery methods face challenges in achieving optimal efficiency.

Purpose of the Study:

• To develop an improved polymeric CRISPR/Cas9 system for enhanced gene delivery and editing efficiency.
• To create ribonucleoprotein (RNP) nanoparticles for improved intracellular targeting.
• To compare the efficacy of the novel system against traditional monomeric CRISPR/Cas9 complexes.

Main Methods:

• Development of polymeric RNP nanoparticles incorporating single-guide RNA (sgRNA), small interfering RNA (siRNA), and Cas9 endonuclease.
• Utilizing chimeric poly-sgRNA/siRNA sequences within the nanoparticles.
• Delivery of RNP nanoparticles via cationic lipids.
• Dicer-mediated digestion of siRNA components to generate multiple sgRNA-Cas9 RNP complexes.
• Evaluation of target gene disruption in cellular and animal models.

Main Results:

• The polymeric CRISPR/Cas9 system demonstrated improved delivery efficiency compared to monomeric systems.
• Chimeric poly-sgRNA/siRNA nanoparticles generated multiple sgRNA-Cas9 RNP complexes.
• Enhanced disruption of target genes was observed in both cell cultures and animal models.
• The novel RNP nanoparticle system showed superior performance in genome editing applications.

Conclusions:

• The devised polymeric CRISPR/Cas9 system based on RNP nanoparticles significantly enhances gene editing efficiency.
• This innovative approach offers a promising strategy for advancing genome-editing tool delivery in biomedical research and therapeutics.
• The system's ability to generate multiple active complexes contributes to its superior performance.