Intracellular build-up RNAi with single-strand circular RNAs as siRNA precursors

Area of Science:

• Biochemistry
• Molecular Biology
• RNA Therapeutics

Background:

• RNA interference (RNAi) is a powerful gene silencing mechanism.
• Current RNAi delivery methods face challenges with immunogenicity and cellular uptake.
• Development of novel RNA precursors is crucial for effective RNAi therapeutics.

Purpose of the Study:

• To introduce a new "build-up RNAi" strategy using circular RNA precursors.
• To evaluate the advantages of circular RNA formats in RNA interference.
• To assess the impact on immunogenicity and cellular uptake.

Main Methods:

• Design and synthesis of single-strand circular RNAs.
• Incorporation of photocleavable units or disulfide moieties into circular RNAs.
• Testing of circular RNA precursors in an RNA interference context.

Main Results:

• Demonstration of a functional "build-up RNAi" approach.
• Circular RNA precursors showed distinct properties compared to linear counterparts.
• Preliminary data suggest modulation of immunogenicity and improved cellular uptake.

Conclusions:

• The "build-up RNAi" approach offers a promising alternative for RNA interference.
• Circular RNA formats present potential advantages for therapeutic RNA delivery.
• Further investigation is warranted to optimize this novel RNAi strategy.