LDLR and non-small cell lung carcinoma: Fatty acid-binding protein 4 (FABP4), ATP-binding cassette subfamily B member 1 (ABCB1), low-density lipoprotein receptor (LDLR) and prostaglandin endoperoxide synthase 2 (PTGS2/COX-2) are highly expressed in NSCLC tissues, and the expression of syndecan 4 (SCD4) in these tissues was low (Fig. 5).