LPAR1 and hepatocellular carcinoma: Because we failed to detect significant LPAR1/LPAR3 expression within the larger tumor mass, or more distant NTL, and cells that stained for LPAR1/LPAR3 did not stain for the hepatocyte marker Hep par1, we hypothesized LPAR1/LPAR3 expression was confined to a non-HCC, non-hepatocyte cell population.