DHX8 (DEAH-box helicase 8) is a crucial RNA helicase that plays essential roles in pre-mRNA splicing and cellular stress responses. As a core component of the spliceosome, DHX8 facilitates the second catalytic step of splicing and promotes the release of mature mRNA from the spliceosome complex 12. The protein exhibits adenine-rich RNA binding preference and undergoes conformational changes upon RNA binding that trigger ADP release, with the hook-turn motif acting as a regulatory gatekeeper for directional RNA movement 1. DHX8 interacts functionally with spliceosome-associated factors including cactin and SRRM2 to ensure efficient splicing of thousands of pre-mRNAs, which is critical for maintaining chromosome 17 and genome stability 3. Beyond splicing, DHX8 regulates heat shock factor 1 (HSF1)-mediated stress responses by controlling intron retention in HSF1 transcripts, thereby modulating cancer-associated gene expression programs 4. Loss of DHX8 function leads to widespread intron retention, particularly affecting stress-response and oncogenic pathways, and preferentially induces apoptosis in cancer cells compared to normal cells 4. Genetic variants in DHX8 have been associated with various diseases including childhood-onset lupus and antidepressant response, highlighting its clinical relevance 56.