Trps1调控胆管上皮细胞上皮-间质转化的实验研究

目的探讨毛发鼻指(趾)综合征1型相关基因(tricho-rhino-pharyngeal syndrome type 1,Trps1)在冷保存再灌注损伤(cold preservation reperfusion injury,CPRI)诱导人肝内胆管上皮细胞(human intrahepatic biliary epithelial cells,HIBECs)上皮-间质转化(epithelial-mesenchymal transition,EMT)中的作用。方法体外模拟CPRI处理HIBECs检测上皮标志物E-cadherin、CK19,间质标志物Vimentin、α-SMA及目标基因Trps1的表达。用Trps1腺病毒或Trps1 siRNA载体转染HIBECs后,重复CPRI诱导实验,探讨Trps1对HIBECs EMT的调控作用。结果随着冷保存时间的延长,上皮标志物E-cadherin、CK19 mRNA和蛋白表达持续减少(P=0.018,0.011;P=0.039,0.044),间质标志物Vimentin、α-SMA表达持续增加(P=0.002,0.026;P=0.035,0.016);冷保存12 h,细胞内Trps1 mRNA和蛋白表达增加(P=0.018,0.031),其后随冷保存时间延长持续减少(P=0.026,0.009)。相关分析显示在该过程中,Trps1与上皮标志物表达正相关(r=0.981,0.913;P=0.000,0.002),而与间质标志物表达负相关(r=-0.711,-0.847;P=0.009,0.005)。Trps1腺病毒转染HIBEC后,重复上述CPRI诱导实验,E-cadherin表达增加(P=0.002,0.000),Vimentin表达减少(P=0.000,0.017),CPRI诱导HIBECs EMT效应受到抑制;Trps1 siRNA转染HIBECs后,重复上述CPRI诱导实验,E-cadherin表达减少(P=0.032,0.044),Vimentin表达增加(P=0.047,0.031),加强CPRI诱导HIBECs EMT效应。结论体外模拟CPRI可诱导HIBECs发生EMT,Trps1参与调控HIBECs EMT,发挥重要的拮抗作用并可能逆转该过程。