Fig. 7: Schematic diagram of functional regulation of miR-3074-5p on M1 polarization and pyroptosis of decidual macrophages by targeting ERα, leading to adverse pregnancy outcomes.

Abnormally increased miR-3074-5p expression in dMĻs at the early pregnancy could directly inhibit ERα expression, and subsequently activate NLRP3 inflammasome by activating NFĪŗB signal pathway or/and promoting the interaction of NLRP3 and ASC, followed by the enhancement of M1 polarization and pyroptosis of dMĻs, disturbing the immune-microenvironment at the maternal-fetal interface and finally leading to embryo loss and abnormal fetal development.