GLI2 and acute myeloid leukemia: After detecting circFN1 expression level in human bone marrow stromal HS‐5 cells and three AML cell lines (HL‐60, NB4, and Thp‐1), we found that in comparison with HS‐5 cells, circFN1 was up‐regulated in AML cell lines (Figure 1B, P < 0.01, P < 0.001), and HL‐60 was obviously proliferated.