PTBP1 and acute myeloid leukemia: CircMYBL2 (30), which was upregulated in AML with Fms-like tyrosine kinase-3 internal tandem duplication (FLT3-ITD) mutations, could enhance the translational efficiency of FLT3 kinase by recruiting PTBP1 to promote the development and confer drug resistance of FLT3-ITD-positive AML.