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Tang, M. et al.

Decidual differentiation of stromal cells promotes Proprotein Convertase 5/6 expression and lefty processing.

Lefty/ Ebaf polypeptides, novel members of the TGF-beta superfamily, are involved in endometrial differentiation and embryo implantation. Recently, we showed that, during undisturbed estrous cycle, lefty is present in mouse uterine horn primarily in a precursor form. Here, we show that decidual differentiation of endometrial stroma leads to increased lefty (approximately 3.1- to 3.6-fold in vivo and 5- to 8-fold in vitro) and processing of its precursor primarily to its long form. This event occurs on d 5 of pregnancy, and is paralleled by proprotein convertase (PC)5/6 up-regulation (approximately 6-fold increase for PC5A and 3-fold increase for PC5B) in decidualized uterine horn, independent of embryo implantation. Among the known convertases, only PC5/6A processes lefty to its long form. Taken together, the findings show that decidualized differentiation of stroma, which is a prerequisite for embryo implantation, leads to processing of lefty by PC5/6A.[1]

References

Decidual differentiation of stromal cells promotes Proprotein Convertase 5/6 expression and lefty processing. Tang, M., Mikhailik, A., Pauli, I., Giudice, L.C., Fazelabas, A.T., Tulac, S., Carson, D.D., Kaufman, D.G., Barbier, C., Creemers, J.W., Tabibzadeh, S. Endocrinology (2005) [Pubmed]

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