FABP4 and acute myeloid leukemia: Specifically, the findings of immunofluorescence staining using the anti-human FABP4 polyclonal antibody demonstrated a significant increase in the expression of FABP4 in AML-derived adipocytes compared to HD-derived adipocytes (2064 ± 33.06% and 1010 ± 35.0%, respectively; p = 0.03; Fig. 1C, D).