Mol. Hum. Reprod. Advance Access originally published online on May 20, 2008
Molecular Human Reproduction 2008 14(7):423-430; doi:10.1093/molehr/gan032
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CXCL10 and IL-6 induce chemotaxis in human trophoblast cell lines
1Fundación Instituto Valenciano de Infertilidad (FIVI), University of Valencia, C/ Guadassuar 1, Bajo, 46015 Valencia, Spain 2Department of Pediatrics, Obstetrics and Gynecology, School of Medicine, University of Valencia, Av. Blasco Ibáñez 17, 46010 Valencia, Spain
3 Correspondence address. E-mail: csimon{at}ivi.es
The investigation of trophoblast chemoattractive molecules in humans is of high interest for the reproductive field. Current evidence in ruminants demonstrates that CXCL10, formerly the interferon-
-inducible protein 10 (IP-10), is a potent chemotactic molecule implicated in the migration of trophoblast cells during early gestation. The aim of this work was to explore the existence of CXCL10/CXCR3 in the human model. Furthermore, chemotaxis assays were performed to demonstrate CXCL10 chemotactic activity in the human trophoblast cell lines JEG-3 and AC-1M88. Surprisingly, the conditioned media from epithelial endometrial cells (EEC) induced the highest trophoblast migration rate. Cytokine and chemokine membrane protein arrays were used to identify the secreted protein profile of EEC-conditioned media, and IL-6 was found to be the most abundant and CXCL13 the second most abundant molecule. Using a chemotaxis assay on AC-IM88, IL-6 antibody blocked the effect of EEC, indicating IL-6 to be an effective chemoattractive factor for trophoblast cells in the human model.
Key words: CXCL10/chemotaxis/implantation/IL-6
Submitted on April 15, 2008; resubmitted on May 13, 2008; accepted on May 15, 2008.