Lysophosphatidic acid (LPA) is a bioactive lipid molecule with a phosphate, a glycerol, and a fatty acid in its structure. The cellular effects of LPA include proliferation, migration, cytokine secretion, and morphological change. These pleiotropic actions allow LPA to participate in a wide variety of biological processes, such as brain development, oncogenesis, wound healing and cancer progression1. To date, at least 6 subtypes of LPA receptor have been identified. The LPA1–3 receptors are members of the endothelial cell differentiation gene (Edg) family. LPA4, a member of the purinergic receptor family, and the recently identified LPA5 are structurally distant from the canonical Edg LPA1–3 receptors. LPA4 and LPA5 are linked to Gq, G12/13 and Gs but not Gi, while LPA1–3 all couple to Gi in addition to Gq and G12/13