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    6 Neop lasm

    2015-03-22 03:35:26

    6 Neop lasm

    2015043 Effects of interference w ith the expressions of aquaporin 3 and phospholipase D2 by small interfering RNAs on the proliferation and apoptosis of a hum an cutaneous squam ous cell carcinom a cell line A431.WANG Xiaoyong(王小勇),et al.Dept Dermatol,Hangzhou TCM Hosp,Hangzhou 310007.Chin J Dermatol2014;47(11):772-775.

    Ob jectiveTo investigate the effects of aquaporin 3(AQP3)and phospholipase D2(PLD2)on the proliferation and apoptosis of a human cutaneous squamous cell carcinoma cell line A431.MethodsThree small interfering RNAs(siRNAs)were constructed targeting the AQP3 and PLD2 genes separately,and transfected into A431 cells using liposomes.Then,fluorescence quantitative PCR was performed to find the most efficient siRNAs. Western blotwas conducted to detect the protein expression levels of AQP3 and PLD2 in A431 cells after transfection with the selected AQP3-siRNA and PLD2-siRNA. Some A431 cells were divided into five groups:normal control group without any treatment,transfection reagent group treated with the oligofectamine reagent only,negative control group transfected with the negative control siRNA,AQP3-siRNA group transfected with the selected AQP3-siRNA,PLD2-siRNA group transfected with the selected PLD2-siRNA.After additional culture,cell counting kit-8 assay was performed to evaluate the proliferation of A431 cells,flow cytometry to detect the apoptosis of A431 cells after annexin V-fluorescein isocyanate/propidium iodide double-staining.Statistical analysis was carried out by the paired t test.ResultsThe transfection with AQP3-siRNA and PLD2-siRNA induced a significant decrease in the mRNA and protein expressions of AQP3 and PLD2 respectively in A431 cellswhen compared with the untransfected cells.Compared with the negative control group,the proliferation of A431 cells was significantly decelerated at24,48 and 72 hours after transfection in the AQP3-siRNA group(t=24.10,11.00,9.54,respectively,all P<0.01)and PLD2-siRNA group(t=30.47,7.02,8.73,respectively,all P<0.01).A significant increase was observed in the apoptosis of A431 cells at48 and 72 hours after transfection with AQP3-siRNA(t=11.36,20.91,respectively, both P<0.01),and at 72 hours after transfection with PLD2-siRNA(t=4.86,P<0.05)compared with the negative control group.ConclusionThe down-regulation of AQP3 and PLD2 expressions by siRNA can inhibit the proliferation,but induce the apoptosis of A431 cells.

    (Authors)

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