Used primarily in cancer research, it acts as a potent inhibitor of BET proteins, which play a crucial role in regulating gene expression. By blocking these proteins, it disrupts the growth and survival of cancer cells, particularly in hematologic malignancies and certain solid tumors. Additionally, it has shown promise in studies targeting inflammatory diseases and HIV latency, offering potential therapeutic avenues. Its ability to modulate gene expression also makes it a valuable tool in epigenetic research, aiding in the understanding of chromatin biology and transcriptional regulation.