FABP5 and liver cancer: Hence, we carried out a strategy of cross-species comparative oncogenomics by collecting the differentially expressed genes in the liver cancer tissues of tree shrews (Tupaia belangeri) and the differentially expressed proteins in the liver cancer tissues of rats, combined with the Gene Expression Omnibus (GEO) database (including humans and mice).4,5 Among the different potential targets, the epidermal fatty acid binding protein 5 (FABP5), also known as E-FABP, attracted our attention.