Objective:To investigate the effect on the CXCR4/ PI3K/ AKT pathway after the transfection of miR-155 mimics and miR-155 inhibitor combined with the research on the ability of invasion and migration of human chorionic JEG-3 trophoblast cells. Methods: Chemically synthesized miR-155 mimics and miR-155 inhibitor were transfected into JEG-3 cells. The effect on the ability of invasion and migration were analyzed by Transwell migration assay and Wound healing assay. The expression of CXCR4 mRNA was detected by Real-time PCR. The expression of CXCR4 and p-AKT protein were detected by Western blot. Results: Transfection with miR-155 mimics significantly down-regulated the expression of CXCR4 as compared with the control group(P<0.05);JEG-3 cells transfected miR-155 mimics had lower levels of migration and invasion capacity than cells in the control group(P<0.05). However, transfection with miR-155 inhibitor significantly up-regulated the expression of CXCR4 as compared with the control group(P<0.05); JEG-3 cells transfected miR-155 inhibitor had higher levels of migration and invasion capacity than cells in the control group(P <0.05). Addition,the expression of p-AKT protein of JEG-3 cells was down-regulated after transfected miR-155 mimics,and the expression of p-AKT protein of JEG-3 cells was up-regulated after transfected miR-155 inhibitor. Conclusion: miR-155 may inhibits the invasion and migration of trophoblast cells by regulating CXCR4/ PI3K/ AKT pathway contributing to the development of preeclampsia.%Objective:To investigate the effect on the CXCR4/PI3K/AKT pathway after the transfection of miR-155 mimics and miR-155 inhibitor combined with the research on the ability of invasion and migration of human chorionic JEG-3 trophoblast cells. Methods:Chemically synthesized miR-155 mimics and miR-155 inhibitor were transfected into JEG-3 cells. The effect on the ability of invasion and migration were analyzed by Transwell migration assay and Wound healing assay. The expression of CXCR4 mRNA was detected by Real-time PCR. The expression of CXCR4 and p-AKT protein were detected by Western blot. Results: Transfection with miR-155 mimics significantly down-regulated the expression of CXCR4 as compared with the control group(P<0. 05);JEG-3 cells transfected miR-155 mimics had lower levels of migration and invasion capacity than cells in the control group(P<0. 05). However, transfection with miR-155 inhibitor significantly up-regulated the expression of CXCR4 as compared with the control group(P<0. 05);JEG-3 cells transfected miR-155 inhibitor had higher levels of migration and invasion capacity than cells in the control group ( P<0.05).Addition,the expression of p-AKT protein of JEG-3 cells was down-regulated after transfected miR-155 mimics,and the expression of p-AKT protein of JEG-3 cells was up-regulated after transfected miR-155 inhibitor. Conclusion:miR-155 may inhibits the invasion and migration of trophoblast cells by regulating CXCR4/PI3K/AKT pathway contributing to the development of preeclampsia.
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