BCL2L1 and chronic myelogenous leukemia, BCR-ABL1 positive: In addition, exosomes from chronic myeloid leukemia and nasopharyngeal carcinoma tumors were used to promote proliferation of lymphocytes and other cells by increasing BCL-w, BCL-xl, and survivin, and a reduction of the pro-apoptotic molecules BAD, BAX and PUMA [34].