Psammaplin A is a marine metabolite. Psammaplin A is a selective HDAC1 (IC50: 45 nM), DNA methyltransferases (IC50: 18.6 nM) and aminopeptidase N (APN) (IC50: 18 µM) inhibitor. Psammaplin A also inhibits DNA topoisomerase and farnesyl protein transferase. Psammaplin A is a PPARgamma activator and induces apoptosis. Psammaplin A has antitumor and anti-inflammatory activities. Psammaplin A has antibacterial activity against Gram-positive bacteria and inhibits DNA synthesis and DNA gyrase activity. Psammaplin A inhibits angiogenesis[1][2][3][4][5][6][7][8].