TGFB1 was decreased in the secretomes of AML-MSCs compared to D-MSCs, both at the onset (Log2FC = −4.6, p = 0.0004) and in remission (Log2FC = −4.08, p = 0.0007), and it was not detected in ALL-MSCs. This evidence concerns the gene TGFB1 and acute lymphoblastic leukemia.