Enzyme or receptor Relative expression level in female hippocampusa Reference organ 5a-reductase 1 1: 3 Liver 5a-reductase 2 1: 300 Prostatec AR 1: 10 Prostate StAR 1: 100 adrenal aValue of Proestrus sample was used because no fluctuation of mRNA level was observed between any stage of estrous cycle bRelative expression level in female hippocampus (Proestrus) is indicated with the ratio to that in reference organ cProstate was prepared from 12 week-old male rats

Table 1: Comparison of mRNA levels of steroidogenic enzymes or receptors between in hippocampus and in reference organ.