@article {1948, title = {Chemerin regulates NK cell accumulation and endothelial cell morphogenesis in the decidua during early pregnancy.}, journal = {J Clin Endocrinol Metab}, volume = {97}, year = {2012}, month = {2012 Oct}, pages = {3603-12}, abstract = {

CONTEXT: Although decidual natural killer (NK) cell accumulation and vascular remodeling are critical steps to ensure successful pregnancy, the molecular mechanisms controlling these events are poorly defined.

OBJECTIVE: Herein we analyzed whether chemerin, a recently identified chemoattractant involved in many pathophysiological processes, could be expressed in the uterine compartment and could regulate events relevant for the good outcome of pregnancy.

DESIGN: Chemerin expression in human primary culture of stromal (ST) cells, extravillous trophoblast cells, and decidual endothelial cells (DEC) was analyzed by RT-PCR, ELISA, and Western blot. Migration through ST or DEC of peripheral blood and decidual (d) NK cells from pregnant women was performed using a transwell assay. A DEC capillary-like tube formation assay was used to evaluate endothelial morphogenesis.

RESULTS: Chemerin is differentially expressed by decidual cells during early pregnancy being present at high levels in ST and extravillous trophoblast cells but not in DEC. Notably, ST cells from pregnant women exhibit and release higher levels of chemerin as compared with ST cells from menopausal or fertile nonpregnant women. Chemerin can support peripheral blood NK cell migration through both DEC and ST cells. Although dNK cells exhibit lower chemerin receptor (CMKLR1) expression than their blood counterpart, CMKLR1 engagement on dNK cells resulted in both ERK activation and migration through decidual ST cells. Interestingly, DEC also express CMKLR1 and undergo ERK activation and capillary-like tube structure formation upon exposure to chemerin.

CONCLUSIONS: Our data indicate that chemerin is up-regulated during decidualization and might contribute to NK cell accumulation and vascular remodeling during early pregnancy.

}, keywords = {Capillaries, Cell Movement, Chemokines, Decidua, Endothelial Cells, Female, Humans, Killer Cells, Natural, MAP Kinase Signaling System, Neovascularization, Physiologic, Pregnancy, Pregnancy Trimester, First, Receptors, Chemokine, RNA, Messenger, Stromal Cells, Trophoblasts}, issn = {1945-7197}, doi = {10.1210/jc.2012-1102}, author = {Carlino, Claudia and Trotta, Eleonora and Stabile, Helena and Morrone, Stefania and Bulla, Roberta and Soriani, Alessandra and Iannitto, Maria Luisa and Agostinis, Chiara and Mocci, Carlo and Minozzi, Massimo and Aragona, Cesare and Perniola, Giorgia and Tedesco, Francesco and Sozzani, Silvano and Santoni, Angela and Gismondi, Angela} } @article {1615, title = {An alternative role of C1q in cell migration and tissue remodeling: contribution to trophoblast invasion and placental development.}, journal = {J Immunol}, volume = {185}, year = {2010}, month = {2010 Oct 1}, pages = {4420-9}, abstract = {

Fetal trophoblast cells invading the decidua in the early phase of pregnancy establish complex interaction with the maternal extracellular matrix. We discovered that C1q was widely distributed in human decidual stroma in the absence of C4 and C3 and was actively synthesized by migrating extravillous trophoblasts. The cells expressed the messages for the three chains of C1q and secreted this complement component that interacted with the proteins of the decidual extracellular matrix. Solid phase-bound C1q promoted trophoblast adhesion and migration, and cell binding to C1q resulted in activation of ERK1/2 MAPKs. Ab inhibition experiments showed that the receptors for the globular head of C1q/p33 and α(4)β(1) integrin were both involved in this process and were colocalized on the cell surface following binding of C1q to trophoblasts. We also found that C1q(-/-) mice manifested increased frequency of fetal resorption, reduced fetal weight, and smaller litter sizes compared with wild-type mice. C1q deficiency was associated with impaired labyrinth development and decidual vessel remodeling. Collectively, these data suggest that C1q plays an important role in promoting trophoblast invasion of decidua and that defective local production of C1q may be involved in pregnancy disorders, such as pre-eclampsia, characterized by poor trophoblast invasion.

}, keywords = {Animals, Cell Adhesion, Chemotaxis, Leukocyte, Complement C1q, Female, Humans, Immunoblotting, Immunohistochemistry, Immunoprecipitation, Mice, Mice, Inbred C57BL, Microscopy, Confocal, Placentation, Pre-Eclampsia, Pregnancy, Reverse Transcriptase Polymerase Chain Reaction, Trophoblasts}, issn = {1550-6606}, doi = {10.4049/jimmunol.0903215}, author = {Agostinis, Chiara and Bulla, Roberta and Tripodo, Claudio and Gismondi, Angela and Stabile, Helena and Bossi, Fleur and Guarnotta, Carla and Garlanda, Cecilia and De Seta, Francesco and Spessotto, Paola and Santoni, Angela and Ghebrehiwet, Berhane and Girardi, Guillermina and Tedesco, Francesco} }