Nature子刊：复旦大学杨力团队发现调控结直肠癌发展新型环状RNA

Core Insights - The article discusses the role of circular RNA (circRNA) in gene expression regulation, highlighting its importance in various biological processes and diseases, particularly cancer [2][8]. Group 1: CircRNA Mechanism and Function - Pre-mRNA reverse splicing leads to the production of circRNA, which shares nearly identical sequences with linear RNA but differs at the back-splicing junction (BSJ) [2]. - CircRNA plays significant roles in gene expression regulation, including transcription modulation, mRNA splicing interference, acting as "sponges" for miRNA or proteins, influencing translation, and even being translated into peptides [2]. - High-expression circRNA has been linked to maintaining quiescent hematopoietic stem cells, regulating cell growth and cancer progression, affecting brain function and neuronal development, and modulating innate immune responses [2]. Group 2: Research Findings on circMAN1A2 - A study published by Fudan University identified a circRNA, circMAN1A2(2,3,4,5), that is highly expressed in tumors and regulates colorectal cancer (CRC) development through RNA-RNA interactions [3][5]. - The research team analyzed the variable circularization (AC) patterns across multiple cell lines and CRC tissues, identifying the primary expressed circRNA at each AC gene locus [5]. - CircMAN1A2(2,3,4,5) enhances the stability of CENPB mRNA by interacting with its 3' untranslated region (3' UTR), and inhibiting this interaction can suppress CRC progression [7][8].