title: Comparison of murine thymic stromal lymphopoietin- and polyinosinic polycytidylic acid-mediated placental dendritic cell activation.
abstract: We confirmed previously the existence of thymic stromal lymphopoietin (TSLP)-positive cells in murine placenta by flow cytometry. To compare the characteristics of Toll-like receptor 3 (TLR3)- and TSLP-mediated placental dendritic cell (DC) activation, pregnant BALB/c mouse mated with C57BL/6 male were used as a model of allogenic gestation. Placental CD11c(+) DCs were potently activated by the TLR3-agonist polyinosinic polycytidylic acid [poly (I:C)], subsequently causing increased expression of co-stimulatory molecules. Accordingly, increased intracellular production of interleukin (IL)-12 and interferon (IFN)-gamma, but not IL-4 or IL-10, were detected after stimulation by poly (I:C). In the case of TSLP-stimulation, although increased expression of co-stimulatory molecules was also detected, there was no substantial increase of intracellular production of IL-12, IFN-gamma, IL-4 or IL-10. In contrast, the expression of the Th2 cell-attracting chemokine, the thymus and activation-regulated chemokine (TARC) or CCL17, was significantly boosted in response to TSLP induction, whereas no significant increase of CCL17 was observed when triggering TLR3 with its specific agonist poly (I:C). The data were further supported by a CD4(+)IL-10(+) cell migratory assay. These results suggest that TSLP-TSLP receptor interaction may result in a Th2-type microenvironment at the feto-maternal interface by inducing the production of Th2 cell-attracting chemokine and modulating the immigration of Th2-type cells.
authors.affiliation: Institute of Tissue Transplantation and Immunology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China. yilinonline@gmail.com
authors.forename: Yi
authors.initials: Y
authors.lastname: Lin
authors.forename: Wenjing
authors.initials: W
authors.lastname: Wang
authors.forename: Haiyan
authors.initials: H
authors.lastname: Jin
authors.forename: Yanmin
authors.initials: Y
authors.lastname: Zhong
authors.forename: Jingfang
authors.initials: J
authors.lastname: Di
authors.forename: Shan
authors.initials: S
authors.lastname: Zeng
authors.forename: Shigeru
authors.initials: S
authors.lastname: Saito
mesh_terms: D000818:Animals; D000906:Antibodies / Q000276:immunology / Q000494:pharmacology; D002465:Cell Movement / Q000187:drug effects; D002478:Cells, Cultured; D016207:Cytokines / Q000494:pharmacology*; D003713:Dendritic Cells / Q000187:drug effects* / Q000276:immunology*; D005260:Female; D008297:Male; D051379:Mice; D010920:Placenta / Q000166:cytology / Q000187:drug effects* / Q000276:immunology*; D011070:Poly I-C / Q000494:pharmacology*; D013601:T-Lymphocytes / Q000166:cytology / Q000187:drug effects; D000094632:Thymic Stromal Lymphopoietin
chemical_list: D000906:Antibodies; D016207:Cytokines; D011070:Poly I-C; D000094632:Thymic Stromal Lymphopoietin; C000721967:TSLP protein, mouse