Embryology Research Today is a free monthly online journal that collates and summarizes the latest research about Embryology, including details on stem cells, reproduction, transplants, cloning. | ||||||||
|
Potential role of toll-like receptor 3 in a murine model of polyinosinic-polycytidylic acid-induced embryo resorption.Lin Y, Zeng Y, Zeng S, Wang T Institute of Tissue Transplantation and Immunology, Jinan University, Guangzhou City, China. yilinonline@21cn.com OBJECTIVE: To investigate the potential role that toll-like receptor 3 (TLR3) may play in a murine model of polyinosinic-polycytidylic acid (polyIC)-induced embryo resorption. DESIGN: An animal model-based study on induced embryo resorption. SETTING: University animal laboratory. ANIMAL(S): Pathogen-free animals housed under barrier conditions and monitored for health status. Pregnant BALB/c mouse mated by C57BL/6 male was used as a model of allogeneic gestation. INTERVENTION(S): The administration of polyIC was performed to establish a murine model of induced embryo resorption, with or without TLR3 blocking by multiple injection of mAb against this receptor. MAIN OUTCOME MEASURE(S): Flow cytometric analysis was performed to detect the percentage of CD45(+)DX5+ and DX5(+)CD69+ cell subsets, with the DX5 antigen used as a common natural killer (NK) cell marker, and CD69 as a marker for activated NK cells, respectively. RESULT(S): In the allogeneic mating model, BALB/cxC57BL/6, both the CD45(+)DX5+ and DX5(+)CD69+ cell percentages were significantly elevated upon polyIC stimulation at the absence of anti-TLR3 administration but were kept unchanged if the female mice were pretreated with anti-TLR3 monoclonal antibody. Accordingly, the resorption rate of embryos was boosted by polyIC administration, but this effect could be abrogated by pretreatment of anti-TLR3 mAb. CONCLUSION(S): The engagement of polyIC with TLR3 may be critical to the activation of NK cells infiltrated at the feto-maternal interface, subsequently resulting in an increase in embryo resorption. Published 17 April 2006 in Fertil Steril, 85: 1125-9.
© 2005-2008 Embryology Research Today. All Rights Reserved. |
| ||||||
