5、刺激L02细胞的增殖并促进其转化有关;②通过γsecretase抑制剂DAPT阻断L02/HBx 细胞的Notch 信号通路后,HBx 所介导的L02 细胞恶性转化的生物学效应亦被阻断,且呈剂量时间依赖性;③而DAPT阻断正常L02 细胞的Notch 信号通路对其生物学效应几乎没有影响。推测Notch信号通路在HBx致L02细胞恶性转化中起关键作用。【关键词】肝细胞性肝癌;HBx;Notch;NICD;Hes;DAPT.4 华中科技大学硕士学位论文Effects of Notch signaling in
6、L02 cell malignant transformation induced by hepatitis B virus XproteinDepartmentofgastroenterology,TongjiHospital,TongjiMedicalCollege,HUSTCandidate: Wang Fan Tutor: Prof.Cheng BinAbstractObjective:Thisstudyaimed to investigate the oncogenic effectsofHepa
7、titisBvirusX protein(HBx)and itsrelationship withNotchsignaling in humannontumourhepatic cell line L02 cells.Methods:The HBx gene wasintroducedinto L02 cellsbytransfectionwith vectorsstablelyexpressing HBx.The cellgrowth,cellcycle, apoptosisand xenograftBA
8、LB/c nude micetumormodel ofcellswere studied. Using Westernblotanalysisand quantitative realtime RTPCR,the expressionlevelsofNotchsignaling componentswere also investigated.Blocking Notchsignalingwitha γSecre