TIAL1 is an RNA-binding protein primarily functioning in alternative pre-mRNA splicing and cytoplasmic stress granule (SG) formation 1. It preferentially binds uridine-rich RNA sequences and regulates alternative splicing of genes including SIRT1, where it promotes exon 8 exclusion 2. TIAL1 acts downstream of stress-induced EIF2S1 phosphorylation to recruit untranslated mRNAs to cytoplasmic SGs 1, a mechanism relevant to chemoresistance in esophageal cancer where TIAL1 enhances stress granule nucleation under cisplatin stress 3. In hepatitis B infection, TIAL1 binds the viral pregenomic RNA at the 5' stem-loop structure to selectively increase polymerase translation while decreasing core protein translation, thereby regulating viral replication balance 4. Disease relevance extends across multiple pathologies: TIAL1 is co-sequestered with TDP-43 in neurodegenerative diseases (ALS, FTLD, Alzheimer's), contributing to aberrant APP splicing and amyloid-beta pathology 5. In skin squamous cell carcinoma, TIAL1 functions downstream of MBNL1 in apoptotic pathways suppressing metastasis 6, while in hepatocellular carcinoma, TIAL1 knockdown restores 5-fluorouracil sensitivity in drug-resistant cells 7. These findings establish TIAL1 as a multifunctional regulator linking RNA processing to stress responses, viral replication, and cancer pathogenesis.