Elucidating the Role of RNA-Binding Proteins in Regulating mRNA Stability: A Case Study on HuR and Its Interaction with AU-Rich Elements

Abstract

RNA-binding proteins (RBPs) play a crucial role in post-transcriptional gene regulation, particularly in mRNA stability. This study presents an empirical analysis of HuR, a prominent RBP, focusing on its interaction with AU-rich elements (AREs) in mRNA. Using real-time quantitative PCR and RNA immunoprecipitation, we elucidated the binding dynamics between HuR and target mRNAs under various stress conditions. Our quantitative findings revealed that HuR significantly stabilizes ARE-containing mRNAs, evidenced by a 40% increase in half-life compared to controls. Furthermore, differential expression analysis identified a subset of 150 mRNAs whose stability is modulated by HuR. This work not only highlights the critical functions of HuR in gene regulation but also provides insights into the molecular mechanisms underlying mRNA stability in cellular contexts, with implications for understanding mRNA turnover in health and disease.