Poly(amine-co-ester) nanoparticles for effective Nogo-B knockdown in the liver

Area of Science:

• Biomaterials Science
• Nanomedicine
• Gene Therapy

Background:

• Degradable poly(amine-co-ester) (PACE) terpolymers are promising for siRNA delivery due to efficient encapsulation and low toxicity.
• PACE nanoparticles (NPs) demonstrate effective protein knockdown in various cell types, including HEK293 and primary HUVECs.

Purpose of the Study:

• To evaluate the in vivo efficacy of PACE nanoparticles for siRNA delivery to the liver.
• To investigate the biodistribution and cellular uptake of PACE NPs in the liver after systemic administration.
• To assess the potential of PACE:siRNA NPs in targeting Nogo-B for liver disease treatment.

Main Methods:

• Formulation of PACE nanoparticles (NPs) with varying monomer content.
• In vitro protein knockdown assessment in HEK293 and HUVEC cell lines.
• Intravenous administration of NPs in vivo and subsequent biodistribution analysis.
• siRNA loading into NPs and in vivo Nogo-B protein knockdown measurement in the liver.

Main Results:

• PACE NPs showed substantial protein knockdown in vitro.
• After intravenous administration, NPs accumulated in the liver, with uptake by macrophages, hepatic stellate cells, and liver sinusoidal endothelial cells.
• Systemic administration of sPACE:siRNA NPs resulted in up to 60% Nogo-B protein suppression in the liver.

Conclusions:

• Degradable PACE NPs are effective siRNA delivery vehicles for in vivo gene silencing in the liver.
• PACE NPs demonstrate potential for therapeutic applications in liver diseases such as alcoholic liver disease and fibrosis.
• The study highlights the potential of PACE NPs to deliver siRNA to diverse liver cell populations.