您当前所在位置: 首页 > 学者
在线提示

恭喜!关注成功

在线提示

确认取消关注该学者?

邀请同行关闭

只需输入对方姓名和电子邮箱,就可以邀请你的同行加入中国科技论文在线。

真实姓名:

电子邮件:

尊敬的

我诚挚的邀请你加入中国科技论文在线,点击

链接,进入网站进行注册。

添加个性化留言

已为您找到该学者10条结果 成果回收站

上传时间

2009年03月17日

【期刊论文】Synthesis and preliminary evaluation of gadolinium complexes containing sulfonamide groups as potential MRI contrast agents

郑从义, Guo-Ping Yan, Ph.D, Professor* Cong-Yi Zheng, Professory Wei Cao, M.D.z Wei Li, M.S.* Li-Yun Li, Professor

Radiography (2003) 9, 35-41,-0001,():

-1年11月30日

摘要

Four DTPA and DOTA derivative ligands containing sulfonamide groups and their gadolinium complexes were prepared and characterized. Relaxivity studies showed that these gadolinium complexes possessed higher relaxation effectiveness than those of the corresponding ionic gadolinium complex Gd-DTPA and Gd-DOTA, respectively. In vitro cytotoxicity assay demonstrated that these gadolinium complexes have low cytotoxicity to the human liver cells (L-02). Magnetic resonance imaging (MRI) and experimental data of biodistribution in mice indicated that these gadolinium complexes containing sulfonamide groups could be used as the potential MRI contrast agents for Hepatoma (H22) and Ehrlich ascites carcinoma (EAC) in mice and specific organs such as the liver and could be mostly excreted by the kidneys.

magnetic resonance imaging (, MRI), , gadolinium complexes, sulfanilamide, sulfadiazine, relaxivity, target-specific.,

上传时间

2009年03月17日

【期刊论文】构建猪瘟病毒致细胞病变的PK-15细胞模型

郑从义, 吴海祥, 张楚瑜*, 王家富, 潘兹书, 李蕾, 曹晟, 伊光辉

科学通报,2004,48(8):822~826,-0001,():

-1年11月30日

摘要

猪瘟病毒在离体细胞培养条件下不引起宿主细胞病变,病毒与宿主细胞之间相互作用的研究一直没有合适的模型以猪瘟病毒中国标准强毒石门株为材料,通过基因工程的手段,在构建全基因组感染性克隆的基础上,对全基因组进行部分缺失,获得了7.5kh的亚基因组.以携带野生型猪瘟病毒的PK-15细胞为宿主,用亚基因组进行转染,获得到了能够诱导PK-15细胞产生CPE的亚基因组病毒,检测显示产生CPE的细胞培养物中野生型基因组和亚基因组共同存在猪瘟病毒致细胞病变模型的构建,为进一步研究其致病的分子机制开辟了新的方向。

猪瘟病毒, 基因组感染性克隆, 亚基因组, 干扰缺损颗粒, 致细胞病变效应

上传时间

2009年03月17日

【期刊论文】Following the rule: formation of the 6-helix bundle of the fusion core from severe acute respiratory syndrome coronavirus spike protein and identification of potent peptide inhibitors

郑从义, Jieqing Zhu, a, Gengfu Xiao, b, Yanhui Xu, c, Fang Yuan, d Congyi Zheng, b Yueyong Liu, a Huimin Yan, b David K. Cole, d John I. Bell, d Zihe Rao, c Po Tien, * and George F. Gaoa, d, *

Biochemical and Biophysical Research Communications 319(2004)283-288,-0001,():

-1年11月30日

摘要

Severe acute respiratory syndrome (SARS) coronavirus (SARS-CoV) is a newly identified member of Family Coronaviridae. Coronavirus envelope spike protein S is a class I viral fusion protein which is characterized by the existence of two heptad repeat regions (HR1 and HR2) (forming a complex called fusion core). Here we report that by using in vitro bio-engineering techniques, SARS-CoV HR1 and HR2 bind to each other and form a typical 6-helix bundle. The HR2, either as a synthetic peptide or as a GSTfusion polypeptide, is a potent inhibitor of virus entry. The results do show that SARS-CoV follows the general fusion mechanism of class I viruses and this lays the ground for identification of virus fusion/entry inhibitors for this devastating emerging virus.

SARS-CoV, Coronavirus, Spike(, S), protein, Fusion core, Heptad repeat (, HR1 and HR2), , Inhibition

上传时间

2009年03月17日

【期刊论文】丙肝病毒全基因组cDNA克隆侵染细胞培养体系的建立

郑从义, 姚相杰①, 郭佳①, 郑从义①*, 方呈祥①, 屈三甫①, 陈震球②, 李中红②, 李信墙②*, 李卫云②

科学通报,2004,49(10):965~970,-0001,():

-1年11月30日

摘要

以含有丙肝病毒全基因组 cDNA的重组质粒(pHCV)为材料, 通过基因转染、重组痘病毒辅助使之在HeLa细胞中表达HCV病毒体,建立了一种新的HCV体外细胞培养系统。采用RT-PCR,荧光定量RT-PCR,链特异性RT-PCR,免疫印迹,免疫电子显微镜和电子显微镜负染技术跟踪检测HCV的增殖效率,结果显示,该培养体系中有HCV正链RNA的合成和HCV结构蛋白、非结构蛋白的表达,并组装成直径约47nm的HCV病毒体,病毒体可被偶联有胶体金的抗HCV结构蛋白E2的单抗标记;该体系产生的HCV病毒体滴度达107基因拷贝/mL,远远高于病人血清中的HCV基因拷贝数,也高于迄今报道的任何一种HCV细胞培养体系的病毒滴度,检测结果证明,转染细胞裂解上清中的HCV病毒体可以感染肝癌细胞系Huh7,并在感染细胞中增殖和合成负链RNA中间体,病毒滴度达106基因拷贝/mL。

丙型肝炎病毒(, HCV), , 全基因组, 侵染性cDNA, 克隆, 重组痘病毒, 细胞培养体系

上传时间

2009年03月17日

【期刊论文】Nickle(II) and cobalt(II) complexes of hydroxyl-substituted triazamacrocyclic ligand as potential antitumor agents

郑从义, Feng Liang, a Ping Wang, a Xiang Zhou, a Tao Li, b Zhaoyang Li, c Huakuan Lin, d, Dongzhao Gao, d Congyi Zhengc and Chengtai Wua, *

Bioorganic & Medicinal Chemistry Letters 14(2004)1901-1904,-0001,():

-1年11月30日

摘要

The stability constants for the formation of nickle(II) and cobalt(II) complexes of the ligand [1,4,7]triazecan-9-ol (L) were presented. Antitumor activity of two complexes was reported. Nuclei of [NiL]-stimulated BEL-7402 cells clearly exhibited condensation and break down into chromatin clumps typical of apoptosis. Also it exhibited perturbation effects to cell cycle, and optimal induction of apoptosis was found by Flow-Cytometric analysis. But CoL complex did not exhibit introduction effects to BEL-7402 cells apoptosis; and could not perturb cell cycle. NiL and CuL complexes could cleave supercoiled DNA (pBR 322 DNA) to nicked and linear DNA, and DNA of cells treated with NiL or CuL complex was obviously damaged; while CoL complex only could cleave supercoiled DNA (pBR 322 DNA) to nicked DNA, and DNA of cells treated with CoL complex had no significant difference with control.

Macrocyclic polyamines, Metal complexes, Antitumor activity, DNA cleavage.,

合作学者

  • 郑从义 邀请

    武汉大学,湖北

    尚未开通主页