Past, present, and future of circRNAs

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Exonic circular RNAs (circRNAs) are formed via back-splicing.
• They are abundant, conserved, and tissue-specific in eukaryotes.
• circRNAs are stable and accumulate with age, particularly in neural tissues.

Purpose of the Study:

• To review current knowledge on animal circRNAs.
• To summarize new insights into circRNA functions.
• To discuss circRNA origins and future research avenues.

Main Methods:

• Literature review of recent studies on circRNAs.
• Synthesis of current data on circRNA biogenesis and function.
• Analysis of evolutionary conservation and tissue-specific expression patterns.

Main Results:

• circRNA biogenesis can regulate linear RNA production in cis.
• circRNAs exhibit diverse functions, including microRNA sponging and translation.
• circRNAs are implicated in regulating immune responses and behavior.

Conclusions:

• circRNAs represent a significant class of regulatory molecules in animals.
• Further research is needed to fully elucidate their roles and therapeutic potential.
• Understanding circRNA origins and functions opens new avenues in molecular biology.