We analyzed UCP2 protein levels in several cancer cell models: human chronic myeloid leukemia (K562), human acute monocytic leukemia (THP1), human acute promyelocytic leukemia (HL60), human acute myeloid leukemia (MOLM13), human acute monocytic leukemia (MV4–11), mouse colon carcinoma (MC38), and mouse neuroblastoma (N18TG2) cells. This evidence concerns the gene UCP2 and cancer.