GPR68 and breast carcinoma: Since the effects of OGR1 family GPCRs have been shown to be modulated by LPLs [9,10], we tested whether several lysophospholipids, including lysophosphatidic acid (LPA), lysophosphatidylcholine (LPC), sphingosine-1-phosphate (S1P), and sphingosylphosphorylcholine (SPC), could influence the inhibitory effect of OGR1 on cell migration induced by 10% FBS in human breast cancer cells.