EB病毒潜伏膜蛋白1调节EGF受体核移位

EB病毒编码的病毒潜伏膜蛋白 1(LMP1)是重要的致瘤蛋白,一直以来是EB病毒致瘤机制的研究核心.传统的受体学说认为,细胞膜受体作为第一信使,在细胞膜上与其配体结合发挥生物学效应.但近年来,对EGFR家族成员受体核移位在基因表达调控中意义的研究,拓宽了人们对细胞膜受体生物学功能的认识.利用我们建立的Tet-on系统调控LMP1表达的细胞系,采用Western blot和激光共聚焦显微镜等技术证实,LMP1可调控EGFR的核移位,并呈一定的剂量效应.通过GFP与EGFR及不同突变体的融合蛋白在细胞内的表达发现,EGFR的核定位信号在其核移位过程中起着一定的作用,并初步发现LMP1调控EGFR核移位为配体非依赖性

辛烯基琥珀酸淀粉酯的应用性能

研究了辛烯基琥珀酸淀粉酯（SSOS）的表观黏度、表面活性、辐射降解和酶降解特性,以及SSOS的乳化性能,结果表明：随着SSOS取代度的增大,糊液的表观黏度值增加,且糊液的配制方式对其黏度有较大影响,通过稀释方式制得的糊液表观黏度明显高于直接糊化法,而且取代度越高,这种差别越显著;随着SSOS取代度的增加,糊液的表面张力下降;SSOS的酶降解和辐射降解具有完全不同的规律,酶降解速率随取代度的增加而减慢,而辐射降解速率随取代度的增加而加快,且辐射剂量越大,高取代度SSOS所受的影响越大。通过正交实验发现SSOS在很宽的范围内具有良好的乳化稳定性,且这种稳定性受SSOS取代度、油水比、SSOS浓度的影响比较显著

EB病毒潜伏膜蛋白1调节EGF受体核移

EB病毒编码的病毒潜伏膜蛋白 1(LMP1)是重要的致瘤蛋白,一直以来是EB病毒致瘤机制的研究核心.传统的受体学说认为,细胞膜受体作为第一信使,在细胞膜上与其配体结合发挥生物学效应.但近年来,对EGFR家族成员受体核移位在基因表达调控中意义的研究,拓宽了人们对细胞膜受体生物学功能的认识.利用我们建立的Tet-on系统调控LMP1表达的细胞系,采用Western blot和激光共聚焦显微镜等技术证实,LMP1可调控EGFR的核移位,并呈一定的剂量效应.通过GFP与EGFR及不同突变体的融合蛋白在细胞内的表达发现,EGFR的核定位信号在其核移位过程中起着一定的作用,并初步发现LMP1调控EGFR核移位为配体非依赖性.国家杰出青年基金(批准号:39525022);科学技术部恶性肿瘤发生与发展的基础性研究项目(批准号:G1998051201)资

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies