AM966, a excellent affinity, specific, oral LPA1(IC50=17 nM) antagonist, suppresses LPA-stimulated intracellular calcium release.

Pre-treatment with AM966 (100 nM) completely blocks ERK1/2 phosphorylation induced by either amitriptyline or mianserin. LPA-induced ERK1/2 activation is completely blocked by AM966 (100 nM), which selectively antagonizes LPA1 over LPA2-5, with an IC50 value of 3.8±0.4 nM. AM966 inhibits LPA1-mediated chemotaxis of human A2058 melanoma cells (IC50=138±43 nM), IMR-90 human lung fibroblasts (IC50=182±86 nM) and CHO mLPA1 cells (IC50=469±54 nM).

In a 3-day bleomycin model, AM966 (30 mg/kg, BID) reduces vascular leakage, inflammation and lung injury and inflammation.

AM966 (Chem Scene, Monmouth Junction, NJ, USA) is dissolved in DMSO and stored, and then diluted with appropriate media (DMSO 0.5%) before use.CHO-K1 cells are grown to 80% confluency in 12-well plates, serum-starved for 24 h and incubated in serum-free medium with AM966. After 21 h, [3H]thymidine (0.5 μCi/well) is added and the incubation is continued for 3 h. The medium is then removed, and the cells are placed on ice and washed twice with 1 mL of ice-cold PBS containing 5% trichloroacetic acid. Cells are solubilized and [3H]thymidine incorporation is determined by liquid scintillation counting. Assays are performed in triplicate.

In fasted mice, received AM966 (10 mg/kg), which is prepared in water, by oral gavage.