Abstract
Trophoblast cell differentiation is of paramount importance for successful pregnancy. Krüppel-like factor 6 (KLF6), a transcription factor with diverse roles in cell physiology and tumor biology, is required for trophoblast differentiation through the syncytial pathway. Herein, we demonstrate that extravillous trophoblast (EVT) cell migration and mesenchymal phenotype are increased upon KLF6 downregulation or the expression of a deletion mutant lacking its transcriptional regulatory domain (KΔac). Raman spectroscopy revealed molecular modifications compatible with increased differentiation in cells stably expressing the KΔac mutant. Moreover, abnormally invasive placenta showed lower KLF6 immunostaining compared with the normal placenta. Thus, impaired KLF6 expression or function stimulates EVT migration and differentiation in vitro and may contribute to the physiopathology of the abnormally invasive placenta.
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