IFIT2 (interferon induced protein with tetratricopeptide repeats 2) is an interferon-stimulated gene that serves as a crucial antiviral effector with broader roles in immune regulation and cellular homeostasis 1. The protein functions primarily through AU-rich RNA binding to inhibit viral protein translation and promote apoptosis via mitochondrial pathways involving Bcl2 proteins 21. IFIT2 operates as part of protein complexes with related IFIT family members (IFIT1/ISG56 and IFIT3/ISG60) to elicit cellular responses 2. Beyond its established antiviral activity, IFIT2 demonstrates tumor suppressor properties and has been implicated in multiple cancers, autoimmune diseases, and metabolic conditions 1. In rheumatoid arthritis, IFIT2 upregulation is associated with moderate-high disease activity as part of a proinflammatory gene signature 3. The gene shows tissue-specific expression with highest abundance in spleen and is transcriptionally regulated by interferon-stimulated response elements (ISREs) and NF-κB binding sites in its promoter region 4. In hepatitis B patients, comorbid metabolic dysfunction-associated steatohepatitis reduces IFIT2 expression, potentially compromising antiviral immune responses 5. IFIT2's diverse roles position it as both a diagnostic biomarker and potential therapeutic target across infectious, inflammatory, and neoplastic diseases.