CPEB2 (cytoplasmic polyadenylation element binding protein 2) is an RNA-binding protein that regulates gene expression through post-transcriptional mechanisms, primarily by controlling mRNA stability and translation. CPEB2 binds to cytoplasmic polyadenylation elements (CPEs) in the 3'-untranslated regions of target mRNAs and modulates their polyadenylation status, thereby affecting mRNA stability and translational efficiency 12. The protein plays crucial roles in multiple cellular processes including cell cycle progression, proliferation, and development. In lung development, CPEB2 promotes alveolar myofibroblast proliferation by enhancing PDGFRα mRNA translation, and its deficiency leads to emphysema-like phenotypes 3. CPEB2 also functions in neuronal plasticity, contributing to late-phase long-term potentiation through regulation of local protein synthesis 4. Disease relevance includes tumor suppression in some contexts, where CPEB2 inhibits glioma progression by stabilizing p21 mRNA 5, while paradoxically promoting multiple myeloma progression through ARPC5 upregulation 6. Additionally, CPEB2 participates in a negative feedback loop with p53, fine-tuning p53 levels in renal cancer cells 2. The protein's diverse functions highlight its importance in cellular homeostasis and disease pathogenesis.