Comparative functional RNA editomes of neural differentiation from human PSCs

Area of Science:

• Molecular Biology
• Genetics
• Developmental Biology

Background:

• RNA editing, particularly A-to-G conversions catalyzed by ADAR1 and ADAR2, is crucial for epitranscriptomic complexity.
• Understanding RNA editing's role in stem cell differentiation is vital for developmental biology and regenerative medicine.

Purpose of the Study:

• To investigate the regulatory role of RNA editing in the directed differentiation of human embryonic stem cells (hESCs) into neural progenitor cells (NPCs).
• To profile genome-wide A-to-G editing landscapes during neural differentiation and in various cell lineages.
• To identify specific functional RNA editing events impacting NPC differentiation.

Main Methods:

• CRISPR/Cas9 gene editing to knockout ADAR1/2 in hESCs.
• Genome-wide RNA editing landscape profiling.
• Bioinformatic analysis to identify functional editing events, including miRNA targeting.

Main Results:

• RNA editing plays a significant regulatory role in hESC differentiation toward NPCs.
• Comprehensive RNA editing landscapes were generated for hESCs and derivative cell lineages.
• A potential functional A-to-G editing event in ZYG11B 3'UTR was identified, potentially regulating NPC differentiation via miR6089 targeting.

Conclusions:

• A-to-G RNA editing is functionally important for neural lineage differentiation.
• The study provides insights into RNA editing dynamics during hESC differentiation.
• Identified editing events offer new molecular targets for understanding neural development.