Amplified Electrochemical Immunoassay Using HRP Labeled Protein as an Inhibitor to Silver Deposition in the Presence of H2O2

A novel electrochemical immunosensor with amplification effect based on the enzyme inhibition of silver deposition was proposed. In this method, the capture antibody was first immobilized onto a gold electrode via a self-assembled layer. After a sandwich immunoreaction, HRP labeled antibody was bound to the gold electrode. The HRP on the electrode inhibited silver deposition when the electrode was incubated in hydroquinone-H2O2 solution and silver ion solution. The linear sweep voltammetry was chosen to detect the deposited silver and the result showed that the peak current was linearly proportional to the content of IgG in the range of 50 to 2500 ng/mL with a detection limit of 35 ng/mL.     

HIV-1 PR催化水解第3步机理的研究

在B3LYP/6-31G(d)水平下研究了HIV-1 PR催化水解反应关键性的一步,即第3步反应.模型体系包括了活化位点的3个残基,Asp25(25′)-Thr26(26′)-Gly27(27′) 主要参加反应的基团,构建了由69个原子组成的较大模型体系.进一步研究表明Thr26(26′)和Gly27(27′)在水解反应中只起到保持活化位点平面构型的作用,并未直接参与水解反应.另外,详细分析了第3步反应的分子内及分子间氢键.     

Arenicolsterol A，来自海洋环节动物海蚯蚓中的一种新的细胞毒性烯醇式磺化甾醇

Marine organisms are the important source of the bioactive metabolites. A novel enolic sulfated sterol, arenicolsterol A, has been isolated from a marine annelid Arenicola cristata collected in the coast of Mainland of China.The structure was elucidated using all sorts of spectroscopic data including ESIMS, 1D and 2D NMR etc. The cytotoxic bioactivity of this sterol was evaluated by MTT assay. It could inhibit the growth of human cervix cancer cell line (Hela) and human non-small cell lung cancer cell line (NCI-h6) with IC50 of (3.1 0.6)μg/mL and (7.6 0.8)μg/mL.     

Inhibitory Effects of Polygoni Multiflori Caulis Extracts on Matrix Metalloproteinase Activities

Matrix metalloproteinases(MMPs) play an essential role in development and tissue remodeling of living organisms.However,the overexpression of MMPs has lead to a series of diseases,such as cancer,arthritis,and atherosclerosis;and inhibition of MMPs may have therapeutic benefits.The discovery of MMP inhibitors from herbal has become a prospective event.We showed that the extract of Polygoni multiflori caulis from ethy1 acetate or water(ethy1 acetate extract and water extract) can inhibit the activities of MMPs 9,14,and 16 in a dose-dependent manner and n-buty1 alcohol extract of it can also inhibit these MMPs.Furthermore,we found that n-buty1 alcohol extract and water extract of it influence the cell viability.These discoveries may contribute to the development of MMP inhibitors for the therapy of a variety of pathological conditions.     

人工蜂王的研制及对东方蜜蜂的生物活性

本文模拟天然蜂王信息素的组成，将合成的９－氧代－２Ｅ－癸烯酸（蜂王物质，ＱｕｅｅｎＳｕｂｓｔａｎｃｅ）、Ｒ／Ｓ－９－羟基－２Ｅ－癸烯酸（臭味抑制剂，Ｓｔｉｎｋ－ｏｄｏｕｒｉｎｈｉｂｉｔｏｒ）及其它一些微量成分按一定的比例混合，并附于醋酸纤维上制成人工蜂王，运用人工蜂王对东方蜜蜂进行了活性测试，结果表明在群味、聚集、消除失王情绪、抑制工蜂产卵、抑制建造急造王台等方面表现出了显著的生物活性，同时也研究了人工蜂王对产蜜量的影响。     

Synthesis and biological evaluation of novel 2,4,5-triaryl-1 H-pyrazol-3（2H）-ones as inhibitors of ALK5

A series of 2,4,5-triaryl substituted 1H-pyrazol-3（2H）-ones,as ALK5 inhibitors,were desigened,synthesized and evaluated in vitro.Most compounds exhibited noticeable ALK5 inhibition activities at 1μmol/L and displayed no significant cytotoxicities at 30μmol/L.     

生物合理设计光系统Ⅱ抑制剂研究Ⅳ.新型取代氰基丙烯酸乙酯类化合物的合成及其希尔反应抑制活性

基于所获的受体光合作用Ｄ１蛋白结构模型，运用生物合理设计方法，设计并合成了保留氰基丙烯酸酯类化合物基本结构框架的标题化合物，对所合成的化合物进行了光合作用希尔反应抑制活性的初步测试，结果表明，部分化合物显示出一定的活性。     

Increased Sensitivity of Porcine ΔF508-CFTR Chloride Channel to Specific Small Molecule CFTR Inhibitors

Deletion of the codon encoding the phenylalanine residue at position 508(ΔF508) in the cystic fibrosis transmembrane conductance regulator(CFTR) is the most common mutation causing cystic fibrosis(CF).The human ΔF508 mutation results in a CFTR protein with impaired folding,trafficking,and gating in human and rodents.Recent studies suggest that pig ΔF508-CFTR can be efficiently processed to the plasma membrane as maturely glycosylated protein,indicating species difference of the molecular mechanisms of CFTR ...     

Stat-3二聚潜在抑制剂的合成

报道了九个具体外抗肿瘤活性的ochromycinone类似物的合成。在光氧化反应中得到了一些以外产物。本文所采用的实用路线为合成angucyclinone类化合物以及涉及到的一些中间体提供了新的选择。