1 octadecyl lysophosphatidic acid

1-Octadecyl lysophosphatidic acid (1-octadecyl LPA) is a LPA analog containing stearic acid at the sn-1 position. LPA binds to one of five different G protein linked receptors to mediate a variety of biological responses including cell proliferation, smooth muscle contraction, platelet aggregation, neurite retraction, and cell motility. Alkyl ether-linked LPA derivatives have a higher platelet aggregating activity than the acyl derivatives, most likely stemming from an alkyl-specific LPA receptor. For example, 1-octadecyl LPA has a platelet aggregating EC50 value of 9 nM versus 1-octadecanoyl LPA which has an EC50 value of 177 nM.