The International Journal of Developmental Biology

Int. J. Dev. Biol. 54: 313 - 322 (2010)

Vol 54, Issue 2-3

Special Issue: Placenta

Local regulation of implantation at the human fetal-maternal interface

Review | Published: 11 September 2009

Evdokia Dimitriadis, Guiying Nie, Natalie J. Hannan, Premila Paiva and Lois A. Salamonsen*

Prince Henry’s Institute of Medical Research, Clayton, Victoria, Australia


Embryo implantation and formation of a functional placenta are complex processes that require a plethora of regulatory molecules. In recent years, many of these mediators have been identified, often from studies in experimental animals. Furthermore, their expression patterns at the embryo-maternal interface in women have been characterized and provide clues to their potential actions. What has been missing in most cases is any experimental demonstration of their function. Proteases, cytokines and chemokines are among the molecules identified at the embryo-maternal interface. Functional studies of the protease, proprotein convertase (PC)6, the gp130 cytokines, leukemia inhibitory factor (LIF) and interleukin (IL)11 and the chemokines, CX3CL1 and CCL14 demonstrate potential actions within the uterine cavity. These actions include: enhancing blastocyst development, modifying adhesive properties of the blastocyst and the uterine epithelial surface, and providing chemotactic guidance to the blastocyst. As implantation proceeds, PC6 and IL-11 also act to drive decidualization. The products (proteases, chemokines and cytokines) produced by these decidual cells provide a unique environment. This is important for both directing and restraining trophoblast invasion and for leukocyte trafficking into the decidua until the placenta is fully established.


PC6, LIF, IL-11, chemokine, trophoblast, endometrium

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