PTK2 and hepatocellular carcinoma: While total LPC and LPE levels did not vary upon FAK KD in HCC cells (Figure 2), some saturated species of LPC (14:0; 16:0) and LPE (14:0) were massively and significantly upregulated in Huh-7 cells (Table 2): of note, these species have been reported to be significantly decreased in the sera of HCC patients in multiple publications [33].