Abstract
Objective: Placental dysfunction is a major contributor to miscarriages in humans. We observed elevated expression of Kruppel-like factor 12 (KLF12) in placental villi of women who experienced miscarriage compared to that in women with healthy pregnancies. This study aimed to elucidate the role of KLF12 in maintaining a successful pregnancy. Methods: To investigate the role of KLF12 in placentation, we employed a model of forskolin-induced syncytialization in BeWo cells. Results: Our findings revealed that KLF12 expression is downregulated during normal syncytialization. Conversely, we observed that abnormally high KLF12 levels directly suppressed glial cells missing-1 (GCM1) expression. This suppression of GCM1 expression subsequently impaired BeWo cell syncytialization. Furthermore, we observed placental deformities in KLF12-overexpressing mouse fetuses. Conclusion: This study demonstrated that elevated levels of KLF12 disrupt trophoblast syncytialization by downregulating GCM1 expression. These findings suggest that KLF12 may be a novel candidate gene contributing to unexplained miscarriages.
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