Osteopontin Is Colocalized with the Adhesion Molecule CEACAM1 in the Extravillous Trophoblast of the Human Placenta and Enhances Invasion of CEACAM1-Expressing Placental Cells
| Autor: | Antonis Makrigiannakis, Marine Oberndörfer, Heinrich M. Schulte, Christine Pätschenik, Thomas Löning, Juliane Briese, Ana-Maria Bamberger |
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| Rok vydání: | 2005 |
| Předmět: |
medicine.medical_specialty
Placenta Sialoglycoproteins Endocrinology Diabetes and Metabolism Blotting Western Clinical Biochemistry Fluorescent Antibody Technique Context (language use) Biology Biochemistry Endocrinology stomatognathic system Antigens CD Internal medicine medicine Humans Tissue Distribution Osteopontin Hybridomas Matrigel Invasion Assay Cell adhesion molecule Biochemistry (medical) Trophoblast Transfection Immunohistochemistry Trophoblasts medicine.anatomical_structure embryonic structures biology.protein Female Cell Adhesion Molecules |
| Zdroj: | The Journal of Clinical Endocrinology & Metabolism. 90:5407-5413 |
| ISSN: | 1945-7197 0021-972X |
| DOI: | 10.1210/jc.2004-2434 |
| Popis: | The human placenta is a complex tissue and possesses, through its capacity to proliferate and to invade maternal tissue, qualities that are usually found in malignant tumors. Osteopontin (OPN) and CEACAM1 may regulate these processes.The present study was designed to investigate the expression pattern of OPN in the human placental components and to correlate it with CEACAM1 expression and function in placental cell invasiveness.Immunohistochemistry with an OPN-specific antibody and immunofluorescence were performed on normal placental samples to investigate the expression pattern of OPN and CEACAM1 in the human placenta. Extravillous trophoblast (EVT) hybridoma cells transfected with CEACAM1 and stimulated with OPN were studied using the Matrigel invasion assay.All placentae presented very strong expression of OPN in the EVT at the invasion front, where it colocalized with CEACAM1. In addition, OPN was also present in the villous trophoblast, with strongest expression in the cytotrophoblast of the first trimester. Transfection with CEACAM1 followed by stimulation with OPN resulted in increased invasiveness of EVT hybridoma cells.The present study shows the first systematic analysis of OPN expression pattern in the human placenta showing strong expression in the EVT at the invasion front. Colocalization of OPN with CEACAM1 in the EVT indicates that they might act together to regulate invasiveness at the maternal-fetal interface. Using an in vitro model, we also demonstrated increased cellular invasiveness after OPN treatment. We speculate that OPN and CEACAM1 may act as a functional complex involved in the regulation of placental invasiveness. |
| Databáze: | OpenAIRE |
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