目的基于PI3K-Akt-mTOR通路探究黄芩苷(C_(21)H_(18)O_(11))对淋巴瘤细胞增殖及自噬的作用机制。方法用CCK-8和细胞计数法检测不同质量浓度(0、50、100、200、400、800μg·mL^(-1))黄芩苷对淋巴瘤细胞系Raji细胞增殖的抑制作用,通...目的基于PI3K-Akt-mTOR通路探究黄芩苷(C_(21)H_(18)O_(11))对淋巴瘤细胞增殖及自噬的作用机制。方法用CCK-8和细胞计数法检测不同质量浓度(0、50、100、200、400、800μg·mL^(-1))黄芩苷对淋巴瘤细胞系Raji细胞增殖的抑制作用,通过Annexin V-FITC/PI双染法及DAPI染色法观察细胞凋亡及自噬过程,用蛋白印迹实验检测黄芩苷对细胞凋亡和自噬过程上游机制的影响。结果黄芩苷能够显著抑制磷脂酰肌醇3-激酶(phosphatidyl inositol3-kinase,PI3K)、蛋白激酶B(alkaline protein kinases,Akt)、雷帕霉素靶蛋白(mammal target of rapamycin,mTOR)蛋白的磷酸化,即显著降低p-PI3K、p-Akt和p-mTOR的表达水平(P<0.01);黄芩苷能显著上调LC3-Ⅰ和LC3-Ⅱ蛋白的表达水平,抑制p62蛋白的表达(P<0.01),进而诱导Raji细胞的凋亡和自噬。结论黄芩苷可能通过抑制PI3K-Akt-mTOR信号通路抑制淋巴瘤细胞的生长,并通过提高LC3-Ⅰ和LC3-Ⅱ蛋白的表达水平从而抑制p62的表达,进而促进Raji细胞的凋亡和自噬过程。展开更多
SSC-Linac[1] as the injector for the Separated Sector Cyclotron (SSC), is being constructed at national labo-ratory Heavy Ion Research Facility at Lanzhou (HIRFL). The injection and extraction energy are 3.7 keV/u and...SSC-Linac[1] as the injector for the Separated Sector Cyclotron (SSC), is being constructed at national labo-ratory Heavy Ion Research Facility at Lanzhou (HIRFL). The injection and extraction energy are 3.7 keV/u and1.025 MeV/u, respectively. Fig. 1 shows the front end section of the SSC-Linac. The high charges state continuswave (CW) 4-rod RFQ has been designed and fabricated for some years. From the end of 2013, the commissioningof the RFQ was performed and the beam test was carried out in April 2014. In this paper the experiment resultwill be presented.展开更多
The 53.667 MHz continuous-wave heavy ion RFQ has been designed and manufactured for the SSC-LINAC project.This four-rod RFQ accelerates ions with maximum mass to charge ratio of 7 from 3.728 keV/u to 143 keV/u.Measure...The 53.667 MHz continuous-wave heavy ion RFQ has been designed and manufactured for the SSC-LINAC project.This four-rod RFQ accelerates ions with maximum mass to charge ratio of 7 from 3.728 keV/u to 143 keV/u.Measurements have been carried out to check the RF performance of the cavity and the quality of the electric field.The S11 of the power coupler is adjusted to better than-44 dB,and the Q0 of the cavity is 6440.The quality of the electric field is evaluated by the perturbation method.The measurement procedure and data analysis will be discussed in detail.The error due to gravity of the perturbation bead has been corrected by averaging the fields in different quadrants.As a result,the unflatness of the electric field is±2.5%,and the dipole field component distributes from 0%to 20%in different longitudinal positions,which indicates the asymmetry of the quadrupole field.The unflatness of the quadrupole field distribution represents a good agreement with the simulation results.High power RF test and beam commissioning of the RFQ are on schedule in early 2014.展开更多
文摘目的基于PI3K-Akt-mTOR通路探究黄芩苷(C_(21)H_(18)O_(11))对淋巴瘤细胞增殖及自噬的作用机制。方法用CCK-8和细胞计数法检测不同质量浓度(0、50、100、200、400、800μg·mL^(-1))黄芩苷对淋巴瘤细胞系Raji细胞增殖的抑制作用,通过Annexin V-FITC/PI双染法及DAPI染色法观察细胞凋亡及自噬过程,用蛋白印迹实验检测黄芩苷对细胞凋亡和自噬过程上游机制的影响。结果黄芩苷能够显著抑制磷脂酰肌醇3-激酶(phosphatidyl inositol3-kinase,PI3K)、蛋白激酶B(alkaline protein kinases,Akt)、雷帕霉素靶蛋白(mammal target of rapamycin,mTOR)蛋白的磷酸化,即显著降低p-PI3K、p-Akt和p-mTOR的表达水平(P<0.01);黄芩苷能显著上调LC3-Ⅰ和LC3-Ⅱ蛋白的表达水平,抑制p62蛋白的表达(P<0.01),进而诱导Raji细胞的凋亡和自噬。结论黄芩苷可能通过抑制PI3K-Akt-mTOR信号通路抑制淋巴瘤细胞的生长,并通过提高LC3-Ⅰ和LC3-Ⅱ蛋白的表达水平从而抑制p62的表达,进而促进Raji细胞的凋亡和自噬过程。
基金National Natural Science Foundation of China (10635090, 11375243)
文摘SSC-Linac[1] as the injector for the Separated Sector Cyclotron (SSC), is being constructed at national labo-ratory Heavy Ion Research Facility at Lanzhou (HIRFL). The injection and extraction energy are 3.7 keV/u and1.025 MeV/u, respectively. Fig. 1 shows the front end section of the SSC-Linac. The high charges state continuswave (CW) 4-rod RFQ has been designed and fabricated for some years. From the end of 2013, the commissioningof the RFQ was performed and the beam test was carried out in April 2014. In this paper the experiment resultwill be presented.
基金supported by the National Natural Science Foundation of China(Grant Nos.11079001 and 10905003)the Linear Accelerator Center of PKU-IMPCAS
文摘The 53.667 MHz continuous-wave heavy ion RFQ has been designed and manufactured for the SSC-LINAC project.This four-rod RFQ accelerates ions with maximum mass to charge ratio of 7 from 3.728 keV/u to 143 keV/u.Measurements have been carried out to check the RF performance of the cavity and the quality of the electric field.The S11 of the power coupler is adjusted to better than-44 dB,and the Q0 of the cavity is 6440.The quality of the electric field is evaluated by the perturbation method.The measurement procedure and data analysis will be discussed in detail.The error due to gravity of the perturbation bead has been corrected by averaging the fields in different quadrants.As a result,the unflatness of the electric field is±2.5%,and the dipole field component distributes from 0%to 20%in different longitudinal positions,which indicates the asymmetry of the quadrupole field.The unflatness of the quadrupole field distribution represents a good agreement with the simulation results.High power RF test and beam commissioning of the RFQ are on schedule in early 2014.
