具有谷胱甘肽过氧化物酶活性的催化抗体的研究Ⅰ．谷胱甘肽特征全抗原的合成、表征及性质

用２，４－二硝基氯苯保护谷胱甘肽的巯基制出半抗原，再通过戊二醛共价反应使其与牛血清白蛋白表面的氨基结合，经超胶ＡｃＡ５４凝胶层析纯化，制备出有较强免疫原性的谷胱甘肽全抗原。用元素分析、红外光谱及核磁共振表征了半抗原的结构。电泳分析得全抗原分子量平均为８７０００道尔顿。光谱分析及圆二色谱研究表明其有较强的可见、紫外及荧光特征吸收，且抗原结构的紧密性增强。     

曼氏血吸虫合成多肽抗原研究

在计算机的辅助下，根据曼氏血吸虫２６ＫＤａ谷胱甘肽Ｓ－转移酶的氨基酸序列，通过对其亲水、柔韧性、可接近性、电荷分布和二级结构的分析来预测出６个抗原肽，并用固相法进行了合成。经Ｄｏｔ－ＥＬＩＳＡ法测定，其中的２个对抗日本血吸虫免疫球蛋白多克隆抗体（抗－ＳＪ－ＩｇＣＰｃＡｂ），１个对抗血吸虫表膜单克隆抗体（Ａ６ＭｃＡｂ）均显示良好的抗原性。     

含磷酰杂菲侧基聚苯乙烯的合成及其荧光性质

以2-(6-氧化-6-氢-二苯基(c,e)1,2氧杂磷酰基)-1,4-二羟基苯(ODOPB)结构单元为中心,在两侧通过酯化反应分别引入4-乙烯基苯甲酰基和4-戊氧基苯甲酰基,并作为苯乙烯衍生物单体(MED),在AIBN引发下,聚合得到了含9,10-二氢-9-氧杂-10-磷酰杂菲-10-氧化物(简称磷酰杂菲,DOPO)基团的聚苯乙烯衍生物(PED).因侧链之间具有较强的相互作用以及聚苯乙烯主链的刚性而易形成聚集形态,使分子量超出GPC的正常检测范围;同时表现出良好的热稳定性,MED和PED失重5%时的对应温度分别为339℃和345℃.也正是这两种作用同时存在,并相互制约,侧基之间产生了一定程度的规整排列,限制了磷酰杂菲基团的转动,降低了其非辐射能量转移,从而相对于MED,使PED在THF溶液中荧光强度得到了明显增强.由于PED在沉淀聚集过程中受到THF和沉淀剂(水或正己烷)的共同影响,在沉淀剂含量达到70%之前,侧基之间难以形成规整排列,其分子链内转动很大程度引起非辐射能量转移,所以随着沉淀剂含量的增加,荧光强度不断降低;然而当沉淀剂含量达到70%以上时,由于水分子能够与两个相互靠近的侧基共同形成基于氢键作用的复合超分子结构,这不仅抑制了磷酰杂菲基团的转动能力,增强了荧光强度,在一定程度上表现出AIEE特性,而且会在450nm处出现新的肩峰,以显示该结构有别于侧基自身的密聚集;但以正己烷为沉淀剂时,因不能形成氢键超分子结构,PED分子链只是无序密聚集,所以表现为只是随着正己烷加入荧光强度不断降低,没有出现荧光红移的现象。     

假尿嘧啶核苷结合抗原的制备

假尿嘧啶核苷结合抗原的制备＊李瑜闫书一（成都理工学院应用化学系，成都６１００５９）王科太谢家理庞友印＊＊（四川联合大学化学系，成都６１００６４）关键词假尿嘧啶核苷抗原抗体根据细胞的分子生物学原理和临床研究确认，假尿嘧啶核苷（ψ）可作为某些肿瘤的标志物...     

2-萘酚完全抗原的合成及其抗体的制备

以2-萘氧乙酸(2)为半抗原,牛血清蛋白(BSA)为载体蛋白,用活化酯法合成了2-萘酚完全抗原(1).通过调整反应时间,偶联剂二环已基碳二亚胺与2的质量比以及反应体系中的pH,制备了多种结合比的1′.给新西兰大白兔注射112.40进行免疫,获得了用于免疫分析法测定萘酚类物质的合格2-萘酚抗体.     

新型含磷酰基的脂溶性自由基捕捉剂的合成及其ESR研究

超氧阴离子自由基的研究最近得到了广泛的关注 ,这主要是因为超氧阴离子自由基及由其诱导产生的各种活性氧 ( HOO· ,HO· 和 H2 O2 )与许多病理过程有关 ,如发炎 [1] 、缺血再灌综合症 [2 ] 、 DNA损伤[3] 和神经死亡疾病 [4 ] 等 .自旋捕捉技术是检测自由基最有效的方法 [5～ 9] ,近年来在生物体系活性氧自由基检测中得到广泛应用 [10 ,11] ,大力推动了生物自由基领域的研究 .合成新型自由基捕捉剂及改善其对超氧阴离子自由基的捕捉性能一直是人们追逐的热点 ,我们正致力于这方面的研究 [12 ] .其中提高自由基捕捉剂的脂溶性 ,扩大自…     

便携式血糖仪检测前列腺特异性抗原

基于抗原-抗体特异性识别机理,以单克隆抗体Ab1修饰的Fe3O4磁珠(MB-Ab1)为反应平台,联合了多克隆抗体Ab2和乙醇脱氢酶(ADH)修饰的金纳米颗粒(AuNPs)作为信标(AuNPs-Ab2/ADH),便携式血糖仪(PGM)为检测手段,构建一种前列腺特异性抗原(PSA)检测方法.当PSA存在时,信标AuNPs-...     

四种农药人工抗原的合成与表征

设计并合成了四种农药的人工半抗原,其结构经~1H NMR表征.分别以牛血清蛋白和卵清蛋白为载体蛋白偶联得到对应的人工抗原,为建立四种农药的酶联免疫吸附分析方法奠定基础.     

菲人工抗原的合成与表征

通过Friedel-Crafts酰基化反应在菲分子上引入羧基,得到半抗原菲丁酸-γ-氧(1);通过活化酯法或混合酸酐法将1与牛血清蛋白偶联制得了菲人工抗原,其结构经UV,1H NMR,IR和MS表征.     

新型含磺酰基的磷酰胺氮芥衍生物的合成

以磷酰胺氮芥为药效基团,对甲苯磺酰胺为载体,通过乙二胺的连接方式,合成了14个新型含磺酰基的磷酰胺氮芥衍生物,其结构经1H NMR,13C NMR,31P NMR和元素分析表征.     

The Synthesis of a Novel Phosphorus Containing Antigen

The hydrolysis of peptide is one of the most important chemical processes in life chemistry. It is of great significance to study catalytic antibody, which is capable of catalyzing the hydrolysis on a specific peptide bond. In recent years, we have successfully synthesized some tetrahedral geometry analogues mimicking that of the hippuryl phenylalanine 1 hydrolyzing transition state catalyzed by carboxypeptidase A(CPA)1,2, which is specific for cleavage of the C-terminal amino acid from an o…     

含磷抗原及含硫抗原诱导的抗体水解活性的比较

以过渡态理论为基础,以羧肽酶A(CPA)的天然肽底物马脲酰-苯丙氨酸为模型,分别以磷原子和硫原子为四面体过渡态类似物的中心原子来设计和合成了半抗原和全抗原,将两类抗原用免疫方法诱导制备出抗体,然后对两类抗体水解肽键的活性进行比较。     

Synthesis of a transition-state analog for the hydrolysis of the zearalenone lactone

The development of a catalytic antibody for the hydrolysis of the lactone functionality in zearalenone (1) is viewed as a potential solution to animal fertility problems associated with the estrogenic mycotoxin. A phosphonomacrolactone is proposed as a hapten for the generation of such antibodies. A suitably functionalized aryl phosphonic acid 4 was condensed with the racemic aliphatic fragment 5 via a Mitsunobu reaction. Macrocyclic formation was achieved via RCM to give advanced intermediate 23, a phosphonate analog of zearalenone, ready for deprotection and conjugation to a carrier protein.     

一种新型含磷-溴-氮阻燃剂的合成

以三氯氧磷、季戊四醇、2 ,3-二溴丙醇及三聚氰胺等为原料合成了一种新型磷 -溴 -氮阻燃剂 0 - (2 ,4,6 -三氧杂 - 1-氧基磷杂双环 [2 .2 .2 ]辛烷 - 4-亚甲基 ) - 0 - 2 ,3- (二溴丙基 )磷酸三聚氰胺盐 (Ⅲ ) .改进了中间体 4-羟甲基 - 2 ,6 ,7-三氧杂 - 1-氧基磷杂双环 [2 .2 .2 ]辛烷 (Ⅰ )的合成条件 ,元素分析、红外光谱等确定了结构     

Synthesis of a Novel Ligand Containing Phenyl Pyridine

In this article, we provide a new, efficient route to synthesize 2-[3-(3,4-bis(2-ethylhexyloxy)phenyl]phenyl pyridine ligand from readily available starting materials. The target compound was obtained by a condensation reaction and Suzuki coupling reaction. Structures of compounds were demonstrated by ¹H NMR, ¹³C NMR, and high-resolution mass spectrometry. The advantages of this synthetic route are simple operation, mild reaction conditions, and good yields.     

一种新型磷系阻燃剂的合成

以甲基丙烯酸羟乙酯(1),三氯氧磷(2)和甲醇为原料,合成了一种新型磷系阻燃剂--甲基丙烯酰氧乙基二甲基磷酸酯(3),其结构经1H NMR和IR表征.合成3的较适宜反应条件为:1 0.5 mol,n(1):n(2)=1.0:1.3,于0℃反应6 h.     

Novel Aspects in the Synthesis of Carbenoids Containing P/C-pπ-Bonds

Abstract

The synthesis and x-ray structure analysis of a novel type of carbenoids, aryl-P(=E)=C(Cl)Li(thf)₃ (E=N-aryl, C(SiMe₃)₂), as well as the first example of a 1,3-diphosphetane-2,4-diyl, (aryl-PCCl)₂, is reported and on the basis of quantum chemical calculations its bonding situation is discussed. Furthermore, selected examples for the varying reaction behavior of both types of compounds are presented.     

Selection,Expression and Purification of Human Abzyme Containing Selenium with Type Ⅰ Thyroxine Deiodinase Activity

Single-chain fragment variable(ScFv) antibodies with the substrate binding sites were obtained by repetitive selections from a semi-synthetic phage display antibody library against two haptens——thyroxine(T4) and O-methyl-T4(O-CH3-T4).The positive phage clones were determined by ELISA and then cloned into vector pET30a(+).The recombined plasmids were identified by DNA sequence analysis and transformed into E.coli BL21(DE3).The expressed proteins were isolated,purified,identified by Western blot analysis,and ...     

一种新型含硒有机锗化合物的合成及其抗癌活性

合成了一种新型的含硒有机锗化合物 ,其结构经元素分析 ,IR和1HNMR表征。生物活性结果表明当化合物浓度为 10 -4mol·L -1时 ,对人体肝癌细胞的生长抑制率达 81.4 %。     

Synthesis of Novel Phosphoramide-Tegafur Derivatives Containing Aminopropylsilatrane

Abstract

A series of novel phosphoramide-tegafur derivatives containing γ-aminopropyl silatrane were synthesized via the condensation reactions of phosphoryl dichloride with N¹-(2-furanidyl)-N³-(hydroxyethyl)-5-fluorouracil, followed by condensation with γ-aminopropyl silatrane. The structures of the products were confirmed by ¹H NMR, ³¹P NMR, IR, MS, and elemental analysis. The results of preliminary bioassay showed that the new compounds had an inhibition effect against HCT-8 and Bel-7402 cell lines.