GADD45G (Growth Arrest and DNA Damage-Inducible Gamma) is a tumor suppressor involved in:
Cell Cycle Arrest: Mediates G2/M checkpoint activation via p53-dependent pathways, inhibiting cyclin B1/Cdc25C activity .
DNA Repair: Binds proliferating cell nuclear antigen (PCNA) to facilitate DNA damage response .
Immune Regulation: Enhances CD8+ T cell anti-tumor activity by promoting IFN-γ production and p38 MAPK signaling .
Hepatocellular Carcinoma (HCC):
Overexpression of GADD45G inhibits tumor formation and metastasis by suppressing epithelial-mesenchymal transition (EMT) .
MAPK Pathway Activation: GADD45G upregulates T-bet and Eomes in CD8+ T cells, enhancing anti-tumor immunity .
Embryonic Stem Cell Differentiation: GADD45G initiates differentiation by activating MAPK signaling, reducing self-renewal capacity .
Antibody Validation: