PR domain zinc finger protein 1 (PRDM1) (BLIMP1)

PR domain zinc finger protein 1 (PRDM1), commonly known as BLIMP1, is a master regulator transcription factor essential for the terminal differentiation of B cells into antibody-secreting plasma cells (UniProt: O75626). It functions primarily as a transcriptional repressor, silencing genes required for B-cell proliferation and germinal center identity, such as BCL6 and PAX5 (NCBI Gene: 639). In the context of oncology, BLIMP1 acts as a tumor suppressor in certain B-cell lymphomas, such as diffuse large B-cell lymphoma (DLBCL), where its loss of function contributes to uncontrolled cell growth (PubMed: 16785442). Conversely, BLIMP1 is vital for the survival of multiple myeloma cells, making it a potential therapeutic target in plasma cell dyscrasias (PubMed: 25605874). Beyond B cells, BLIMP1 plays critical roles in T-cell homeostasis, germ cell development, and the maintenance of skin integrity (Wikipedia: PRDM1). While direct small-molecule inhibitors are currently in early research stages, modulating the BLIMP1 pathway with drugs like lenalidomide remains a significant strategy for treating hematological malignancies (DrugBank: DB00480). Therapeutic targeting must be approached cautiously due to its essential role in maintaining humoral immunity and preventing autoimmunity (PubMed: 30305440).

Other names

PRDM1B lymphocyte-induced maturation protein 1PR domain-containing protein 1BLIMP-1

Transcriptional repression of target genes (e.g., PAX5, BCL6, MYC) through recruitment of histone methyltransferases and deacetylases to promote terminal differentiation (UniProt: O75626).