NFKB1 and eosinophilia-myalgia syndrome: Another study has shown that miR-196a regulates MEK/ERK signaling and mediates the aberrant expression of PGR in eutopic endometrium, at least partly hindering decidualization in Ems.24 Therefore, the MEK/ERK signaling pathway and NF-κB may be key targets for the treatment of EMs.