GINS2 (GINS complex subunit 2) is an essential component of the GINS complex that plays a critical role in DNA replication initiation and replication fork progression 1. As part of the CDC45-MCM-GINS (CMG) helicase, GINS2 helps form the molecular machinery that unwinds template DNA during replication. The protein regulates cell cycle progression, particularly at the S phase, by modulating downstream molecules including MCM2, ATM, and CHEK2 1. GINS2 is significantly overexpressed in multiple cancer types including breast cancer, ovarian cancer, gliomas, and oral squamous cell carcinoma 213. In cancer cells, GINS2 promotes proliferation, invasion, and metastasis while inhibiting apoptosis 24. The protein enhances cancer stem cell properties and regulates matrix metalloproteinase-9 expression in triple-negative breast cancer 4. Additionally, GINS2 modulates the tumor immune microenvironment by recruiting PD-L1+ neutrophils and promoting T-cell exhaustion, facilitating immune evasion 3. In gliomas, GINS2 affects temozolomide chemosensitivity through the EGR1/ECT2 axis and DNA damage response pathways 5. These findings establish GINS2 as both a prognostic biomarker and potential therapeutic target across multiple cancer types 6.