Ionizable Lipid with Supramolecular Chemistry Features for RNA Delivery In Vivo

Area of Science:

• Supramolecular chemistry
• Nanotechnology
• RNA therapeutics

Background:

• Lipid nanoparticles (LNPs) and RNA technology are crucial for diagnostics and therapeutics.
• Rational design of novel ionizable lipids is essential for effective systemic administration.

Purpose of the Study:

• To design and characterize a new ionizable lipid, C3-K2-E14, for enhanced RNA delivery.
• To evaluate the stability, safety, and efficacy of C3-K2-E14 based LNPs for potential therapeutic applications.

Main Methods:

• Incorporation of supramolecular chemistry principles into lipid design (C3-K2-E14).
• Optimization of messenger RNA (mRNA) and small interfering RNA (siRNA) formulation conditions.
• Characterization of LNP physicochemical properties (diameter, PDI, encapsulation efficiency) and stability under various storage conditions.
• In vivo evaluation of LNP tolerability, RNA payload delivery, and gene silencing efficacy.

Main Results:

• Optimized LNPs exhibited favorable diameter (<150 nm), PDI (<0.15), and high RNA encapsulation (>90%).
• LNPs demonstrated excellent stability, preserving properties after 2 months of storage at 4°C or 37°C.
• Formulated LNPs were well-tolerated in animals, showing no adverse effects.
• In vivo studies confirmed successful RNA delivery and gene silencing (CSF-1 siRNA) with modulation of leukocyte populations.

Conclusions:

• The novel ionizable lipid C3-K2-E14 enables the creation of stable and effective LNPs for RNA delivery.
• These LNPs show promise for long-term therapeutic applications in chronic diseases.
• The study highlights the utility of rationally designed lipids in advancing RNA-based therapies.