GALM mRNA is induced by RA, and completely inhibited in cells pretreated with actinomycin D, but not with cycloheximide. A, THP-1 cells were treated with either RA (20 nM), actinomycin D (20 nM), RA + actinomycin D, or vehicle (control) for 24 h. B. THP-1 cells were treated with either RA (20 nM), cycloheximide (20 nM), RA+ cycloheximide, or vehicle (control) for 24 h. After incubation, cells were harvested and GALM and GAPDH mRNAwas measured by real-time RT-PCR as described in Materials and Methods. Data are means (with control set to 1) ± SEM, n=3/treatment; * denotes different from control, P<0.05.