We recently discovered that poly(rC) binding protein 1 (PCPB1, also known as heterogenous nuclear ribonucleoprotein E1, hnRNP-E1) inhibited PRL-3 protein through binding 5’-UTR (untranslated region) of PRL-3 mRNA[18] and showed that PRL-3, acting as a downstream target of the internal tandem duplication (ITD) of fms-like tyrosine kinase (FLT3) signaling, was implicated in FLT3 inhibitor therapy in acute myeloid leukemia (AML)[19]. The gene discussed is PTP4A3; the disease is acute myeloid leukemia.