IL17A and precursor B-cell acute lymphoblastic leukemia: Quantitative RT-PCR was used to measure the mRNA levels of IL-17A and IFN-γ in both PBMCs and BMMCs and found that increased expression of IL-17A and decreased expression of IFN-γ were presented in both PBMCs and BMMCs from B-ALL patients compared with those from healthy donors (Fig. 1c).