From 2011 to 2014, the BESIII experiment collected about 5 fb^-1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon proce...From 2011 to 2014, the BESIII experiment collected about 5 fb^-1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon process e＋e- →yma/Fsμ^＋μ^-, the center-of-mass energies of the data samples are measured with a precision of 0.8 MeV. The center-of-mass energy is found to be stable for most of the time during data taking.展开更多
目的:探讨姜黄素(curcumin,Cur)抑制胰腺癌细胞上皮间质转化(epithelial-mesenchymal transition,EMT)及其影响胰腺癌侵袭转移的潜在机制.方法:常规培养3种不同分化特征的胰腺癌细胞株PANC-1、AsPC-1、BxPC-3细胞,采用Western blot法检...目的:探讨姜黄素(curcumin,Cur)抑制胰腺癌细胞上皮间质转化(epithelial-mesenchymal transition,EMT)及其影响胰腺癌侵袭转移的潜在机制.方法:常规培养3种不同分化特征的胰腺癌细胞株PANC-1、AsPC-1、BxPC-3细胞,采用Western blot法检测其EMT标志物E-cadherin、Vimentin蛋白的表达.以终浓度10 ng/mL的转化生长因子-β1(transforming growth factor beta1,TGF-β1)处理低分化PANC-1细胞24 h后,在倒置显微镜下观察其形态变化.分别以10 ng/mL TGF-β1、10μmol/L Cur+10 ng/mL TGF-β1、10μmol/L Cur处理PANC-1细胞,另设空白对照组,分别采用Real-time PCR及Western blot法检测各组E-cadherin、Vimentin表达变化.结果:Western blot结果显示,PANC-1、AsPC-1、BxPC-3细胞的E-cadherin蛋白表达依次增强(1.00±00、1.36±0.04、2.14±0.06,P<0.05),而Vimentin表达则依次减弱(1.00±0.00、0.60±0.05、0.49±0.04,P<0.05),这表明低分化的PANC-1细胞间质特性最强.TGF-β1刺激PANC-1细胞发生典型的EMT形态变化.Real-time PCR和Western b l o t结果均显示,PA N C-1细胞经姜黄素及T G F-β1处理后,与对照组相比,T G F-β1组E-cadherin mRNA及蛋白表达均明显下调(分别为0.67±0.05、0.47±0.05,P<0.05 vs对照组),Vimentin基因mRNA及蛋白则明显上调(分别为2.38±0.14、1.43±0.07,P<0.05 vs对照组),说明TGF-β1促进PANC-1细胞EMT过程.而与TGF-β1组相比,Cur+TGF-β1及Cur组的E-cadherin表达具有上调趋势(mRNA分别为0.98±0.06、1.34±0.08,P<0.05 vs TGF-β1组;蛋白为0.32±0.04、0.68±0.06,P<0.05 vs TGF-β1组),Vimentin却下调(mRNA分别为0.63±0.08、0.99±0.07,P<0.05 vs TGF-β1组;蛋白分别为1.01±0.14、0.57±0.06,P<0.05vs TGF-β1组),其蛋白与mRNA表达结果基本一致.这表明姜黄素具有阻断TGF-β1诱导的PANC-1细胞EMT效应.结论:姜黄素能够阻断TGF-β1诱导的PANC-1细胞的EMT过程,从而抑制其侵袭转移.展开更多
基金Supported by National Key Basic Research Program of China(2015CB856700)National Natural Science Foundation of China(11125525,11235011.11322544,11335008,11425524,Y61137005C)+7 种基金Chinese Academy of Sciences(CAS)Large-Scale Scientific Facility Program,CAS Center for Excellence in Particle Physics(CCEPP),Collaborative Innovation Center for Particles and Interactions(CICPI),Joint Large-Scale Scientific Facility Funds of NSFC and CAS(11179007,U1232201,U1332201),CAS(KJCX2-YW-N29,KJCX2-YWN45),100 Talents Program of CASNational 1000 Talents Program of China,INPACShanghai Key Laboratory for Particle Physics and Cosmology,German Research Foundation DFG(Collaborative Research Center CRC-1044)Istituto Nazionale di Fisica Nucleare,Italy,Ministry of Development of Turkey(DPT2006K-120470)Russian Foundation for Basic Research(14-07-91152)Swedish Research Council,U.S.Department of Energy(DE-FG02-04ER41291,DE-FG02-05ER41374,DE-FG02-94ER40823,DESC0010118)U.S.National Science Foundation,University of Groningen(RuG)and Helniholtzzentrum fuer Schwerionenforschung GmbH(GSI),DarmstadtWCU Program of National Research Foundation of Korea(R32-2008-000-10155-0)
文摘From 2011 to 2014, the BESIII experiment collected about 5 fb^-1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon process e＋e- →yma/Fsμ^＋μ^-, the center-of-mass energies of the data samples are measured with a precision of 0.8 MeV. The center-of-mass energy is found to be stable for most of the time during data taking.
文摘目的:探讨姜黄素(curcumin,Cur)抑制胰腺癌细胞上皮间质转化(epithelial-mesenchymal transition,EMT)及其影响胰腺癌侵袭转移的潜在机制.方法:常规培养3种不同分化特征的胰腺癌细胞株PANC-1、AsPC-1、BxPC-3细胞,采用Western blot法检测其EMT标志物E-cadherin、Vimentin蛋白的表达.以终浓度10 ng/mL的转化生长因子-β1(transforming growth factor beta1,TGF-β1)处理低分化PANC-1细胞24 h后,在倒置显微镜下观察其形态变化.分别以10 ng/mL TGF-β1、10μmol/L Cur+10 ng/mL TGF-β1、10μmol/L Cur处理PANC-1细胞,另设空白对照组,分别采用Real-time PCR及Western blot法检测各组E-cadherin、Vimentin表达变化.结果:Western blot结果显示,PANC-1、AsPC-1、BxPC-3细胞的E-cadherin蛋白表达依次增强(1.00±00、1.36±0.04、2.14±0.06,P<0.05),而Vimentin表达则依次减弱(1.00±0.00、0.60±0.05、0.49±0.04,P<0.05),这表明低分化的PANC-1细胞间质特性最强.TGF-β1刺激PANC-1细胞发生典型的EMT形态变化.Real-time PCR和Western b l o t结果均显示,PA N C-1细胞经姜黄素及T G F-β1处理后,与对照组相比,T G F-β1组E-cadherin mRNA及蛋白表达均明显下调(分别为0.67±0.05、0.47±0.05,P<0.05 vs对照组),Vimentin基因mRNA及蛋白则明显上调(分别为2.38±0.14、1.43±0.07,P<0.05 vs对照组),说明TGF-β1促进PANC-1细胞EMT过程.而与TGF-β1组相比,Cur+TGF-β1及Cur组的E-cadherin表达具有上调趋势(mRNA分别为0.98±0.06、1.34±0.08,P<0.05 vs TGF-β1组;蛋白为0.32±0.04、0.68±0.06,P<0.05 vs TGF-β1组),Vimentin却下调(mRNA分别为0.63±0.08、0.99±0.07,P<0.05 vs TGF-β1组;蛋白分别为1.01±0.14、0.57±0.06,P<0.05vs TGF-β1组),其蛋白与mRNA表达结果基本一致.这表明姜黄素具有阻断TGF-β1诱导的PANC-1细胞EMT效应.结论:姜黄素能够阻断TGF-β1诱导的PANC-1细胞的EMT过程,从而抑制其侵袭转移.
