Transcript levels of the progesterone receptor (PGR), growth regulation by estrogen in breast cancer 1 (GREB1), and natriuretic peptide C (NPPC) were evaluated by qRT-PCR in Ishikawa cells treated for 6 hr with vehicle, 10 nM E2, (A) 10 nM BHT, (B) 10 nM DEA, (C) 10 nM PCE, or (D) 10 nM MDEA in the presence and absence of 10 nM E2. Values were normalized to the reference gene peptidylprolyl isomerase B (PPIB) and set relative to vehicle. Bar graphs represent means of at least five biological replicates ± SEM. *p<0.05, **p<0.01 as determined by ANOVA with Tukey’s post-hoc analysis.