979 resultados para Leonidas, I, King of Sparta, d. 480 B.C.


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A survey of existing data suggests that trophoblast cells produce factors involved in extracellular matrix degradation. In this study, we correlated the expression of cathepsins D and B in the murine ectoplacental cone with the ultrastructural progress of decidual invasion by trophoblast cells. Both proteases were immunolocalized at implantation sites in lysosome-endosome-like compartments of trophoblast giant cells. Cathepsin D, but not cathepsin B, was also detected ultrastructurally in extracellular compartments surrounded by processes of the invading trophoblast containing extracellular matrix components and endometrial cell debris. The expression of cathepsins D and B by trophoblast cells was confirmed by RT-PCR in ectoplacental cones isolated from implantation chambers at gestation day 7.5. Our data addressed a positive relationship between the expression and presence of cathepsin D at the extracellular compartment of the maternal-fetal interface and the invasiveness of the trophoblast during the postimplantation period, suggesting a participation of invading trophoblast cells in the cathepsin D release. Such findings indicate that mouse trophoblast cells might exhibit a proteolytic ability to partake in the decidual invasion process at the maternal-fetal interface. Copyright (C) 2010 S. Karger AG, Basel

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Reprint. Originally published: London : s.n., 1871.

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Added t.-p., with illuminated border.

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ed. with transl. and notes by A. Cowley