HNRNPA1 and chronic myelogenous leukemia, BCR-ABL1 positive: Here, by using leukemic cell lines, a murine leukemic model, and patient samples, we found that leukemic cells selectively transport growth-suppressing miRNAs into exosomes via heterogeneous nuclear ribonucleoprotein A1 (HNRNPA1), resulted in promoted CML cell growth.