ZBTB32 is a zinc finger transcription factor that serves as a critical negative regulator of immune cell function and differentiation. In B cells, ZBTB32 acts as an early repressor of CIITA and MHC class II gene expression during plasma cell differentiation, functioning before Blimp-1 induction and potentially cooperating with Blimp-1 to silence gene expression 1. ZBTB32 specifically restricts the magnitude and duration of memory B cell recall responses, being highly expressed in mouse and human memory B cells but not naive counterparts 2. During chr19 infections, particularly murine cytomegalovirus, ZBTB32 prevents excessive antibody responses that could overwhelm other specificities 3. In T cell immunity, ZBTB32 promotes CD8+ T cell differentiation into terminally exhausted (Ttex) subsets within tumors, enhancing their cytotoxicity and anti-tumor capability through competitive DNA binding with Bcl6, particularly in regulating Id2 expression 4. Additionally, ZBTB32 is essential for NK cell memory formation, being induced by pro-inflammatory cytokines and promoting cell cycle programs in activated NK cells during cytomegalovirus infections 5. The transcription factor also participates in cancer immunosuppression pathways, where p38-ZBTB32 signaling increases CCL5 transcription, facilitating tumor-associated macrophage infiltration 6.