Autotaxin converts lysophosphatidylcholine to lysophosphatidic acid (LPA), which can mediate changes in cell proliferation, angiogenesis, and cytokine secretion. HA-155 is a boronic acid-based compound that inhibits autotaxin (IC50 = 5.7 nM) by selectively binding to its catalytic threonine. It has been shown to dose-dependently block thrombin-induced LPA secretion in platelets.