In fact, proteasomal degradation could be much more important that miRNA reduction of the transcript in the reduction of PGRMC1 levels during decidualization.
Lines 281-5. PGRMC1 (Hpr6.6) increased the rate of cell death (in a non-apoptotic mechanism) in MCF-7 cancer cells in response to H2O2 (PMID: 14523988). That could be discussed here in terms of mechanism.