雌酚酮-17-杂环取代衍生物的合成及抗肿瘤活性评价

以雌酚酮为原料,合成了7个雌酚酮-17-杂环取代衍生物,经过核磁共振~1H NMR、~(13)C NMR、质谱MS和红外光谱IR确定了目标化合物的化学结构。选用人肝癌细胞(HepG2)、人宫颈癌细胞(Hela)和人肺癌细胞(A549)对化合物进行抗增殖活性评价。结果表明,雌酚酮-17-(5-氯-吲哚)腙(3f)对Hep G2细胞和Hela细胞具有显著抑制活性,其半数抑制浓度(IC_(50))分别为13. 60μmol/L和8. 74μmol/L。     

含喹唑啉结构的VEGFR-2抑制剂的合成、体外抗肿瘤活性与分子对接研究

为了研究新型VEGFR-2抑制剂的合成方法及抗肿瘤活性,合成了9个含喹唑啉结构的VEGFR-2抑制剂,以MTT法测试了目标化合物对人结肠癌HCT-116和HT-29 2个细胞株的抑制活性,结果显示化合物A03、A05、A06、A07和A08比阳性对照索拉非尼的活性更好(IC_(50)10μmol/L).为了阐明目标化合物和VEGFR-2的作用机制,分别将sorafenib和化合物A03与VEGFR-2(PDB:2OH4)的DFG-out构象进行了分子对接,结果表明该系列化合物可能作为Ⅱ型激酶抑制剂发挥抗肿瘤作用.     

2-[(取代苯胺基)羰基甲硫基]-DACO类化合物的合成及抗HIV活性研究

基于S-DABO类非核苷类逆转录酶抑制剂(NNRTIs)的构效关系,设计合成了6个新型的2-[(取代苯胺基)羰基甲硫基]-6-环己甲基-3H-嘧啶-4-酮类化合物,并采用MT-4细胞进行了体外抗HIV活性测试.结果表明大多数新化合物表现了明显的抗HIV-1活性(EC50=2.58～0.18μmol/L),其中化合物4b活性最高(EC50=1.64μmol/L,CC50=296.8μmol/L,SI=203.6)优于临床上使用的抗HIV药物奈韦拉平.最后对该类化合物的构效关系进行了讨论.     

溴查尔酮衍生物氰离子探针

以N,N-二乙胺基和N-乙基咔唑为端基电子给体基团,利用4-溴-2-羟基苯乙酮分别与4-(N,N-二乙胺基)苯甲醛和N-乙基咔唑-3-醛缩合得到2种新型溴查尔酮衍生物氰离子探针(化合物Ⅰ和Ⅱ);利用核磁共振光谱仪对其鉴定,用紫外可见分光光度计和荧光光谱仪研究探针的光物理性质及其与氰离子的识别性质,并对其键合机理进行分析。结果表明:实验合成了氰离子探针,且对氰离子表现出明显的吸收和荧光光谱响应,原蓝光波段吸收峰降低,在乙腈中的荧光检测限分别是0.103μmol/L(Ⅰ)和0.002μmol/L(Ⅱ),吸收检测限分别为1.04μmol/L(Ⅰ)和0.12μmol/L(Ⅱ),化合物Ⅱ可以实现在水合环境中对氰离子的识别,其检测限为5.5μmol/L。键合机理分析表明,2种化合物与氰离子之间发生了典型的迈克尔反应。     

去氢胆酸肟类衍生物的设计、合成与体外抗乙肝病毒活性研究

为进一步研究新型抗乙肝病毒活性药物,根据活性片段拼接原理设计了一系列新型结构的去氢胆酸肟类衍生物,并预测其抗乙肝病毒活性。以去氢胆酸为原料经过酯化(或酰胺化)、肟化等反应合成8种新化合物和1种已知化合物,其中,肟类3种,肟醚类6种,均为E构型。以1H NMR、13C NMR和MS测定其结构,发现肟化反应均发生在去氢胆酸3位的羰基上。体外抗乙肝病毒活性测试结果表明部分目标产物对乙肝e型抗原HBe Ag的分泌具有抑制活性,其中,化合物2a和2c的活性较好,其半数抑制浓度IC50分别为170.36μmol/L和97.34μmol/L。初步分析化合物的构效关系,发现甲氧肟醚类化合物活性最好。研究结果为该类结构的新药的研究提供了理论依据。     

7-羰基-12-N-异丙基-13-硝基脱氢松香酸甲酯的合成及其金属离子螯合性

为探讨脱氢松香酸潜在的抗氧化活性,以脱氢松香酸为底物,通过甲酯化、溴代、氧化、硝化、Ullman缩合等步骤,合成了标题化合物,其结构经IR、1HNMR、13CNMR、元素分析和质谱确证.然后采用荧光淬灭法研究了目标化合物对金属离子的螯合作用,发现其对Cu2+和Fe2+均表现出了良好的螯合性能,对Cu2+与Fe2+的耦合常数分别为102.9L/mol、168.3L/mol,有望作为一种通过螯合作用而抑制自由基产生的潜在抗氧化剂.     

原小檗碱衍生物诱导急性淋巴白血病细胞凋亡活性及PAMPA研究（英文）

测定了15个原小檗碱衍生物(3-17)及小檗碱(1)和药根碱(2)抑制急性淋巴白血病细胞(包括Reh和Nalm-6细胞)增殖的活性。其中化合物4(9-溴乙基小檗碱),5(9-氯乙基小檗碱)和6(9-溴丙基小檗碱)表现出最为突出的抑制活性:在Reh细胞中,IC50值分别为0.45、0.39和0.57μmol/L;在Nalm-6细胞中,IC50值分别为3.6,4.3和1.17μmol/L。活性均强于先导化合物小檗碱和药根碱(后两者的IC50值均大于20μmol/L)。此外,化合物4和5能够剂量依赖的通过裂解PARP诱导急性淋巴白血病细胞凋亡,降低procaspase-3的浓度,增加活性caspase-3水平,同时提高细胞质中的细胞色素C水平。进一步,Reh细胞用0.5μmol/L的4和5处理36 h,能够显著下调β-catenin蛋白的表达,以上实验结果证明了这类化合物抑制肿瘤细胞增殖的作用机制可能与Wnt/β-catenin通路相关。化合物1、4、5、7和11的PAMPA膜渗透实验说明,C-9位取代的小檗碱衍生物可以提高化合物的细胞膜渗透性。     

6种中药单体脂肪酶抑制活性及其作用机制

筛选具有胰脂肪酶抑制活性的中药有效成分，明确其作用机制。以文献报道的有减肥降脂作用的6种中药单体化合物（熊果酸、齐墩果酸、姜黄素、大黄酸、芒果苷和二氢杨梅素）为筛选对象，以市售减肥样品奥利司他为阳性对照品，采用对硝基苯酚法通过测定反应体系在405 nm下的吸光度数值来测算出其对胰脂肪酶的抑制率。同时测定抑制作用最强姜黄素的3种主要分解产物（反式阿魏酸、香草酸、香草醛）对胰脂肪酶的抑制率。结果显示：奥利司他、黄素和熊果酸的半数抑制浓度（IC₅₀）依次是0.95 μmol/L、27 μmol/L和100 μmol/L，黄素和熊果酸的抑制作用机理都是通过抑制剂和酶的相互作用，阻碍酶和底物的作用，属于非竞争性抑制。齐墩果酸和双氢杨梅素的最大抑制率是（27.45±0.04）%和23.76%，其余样品的最大抑制率均少于10%；姜黄素和熊果酸具有显著的胰脂肪酶抑制作用，其抑制作用机理属于非竞争性抑制，齐墩果酸和双氢杨梅素有一定脂肪酶抑制作用，其余单体及姜黄素分解产物均无明显脂肪酶抑制作用。     

4-甲基伞形内酯衍生物的合成与生物活性研究

4-甲基伞形内酯(4-甲基-7-羟基香豆素,1)是一种具有重要生物活性的香豆素类天然产物.本文以间苯二酚和乙酰乙酸乙酯为原料,经Pechmann反应合成4-甲基伞形内酯(1).然后以4-甲基伞形内酯(1)为底物,分别经Mannich反应、乙酰化、Fries重排、O-甲基化、Baeyer-Villiger氧化、O-异戊烯基化和Claisen重排等反应步骤,合成了一系列4-甲基伞形内酯衍生物2~10.并对所合成的化合物进行了人宫颈癌Hela细胞的抑制活性测试,结果发现新化合物4-甲基5-异戊烯基-8-羟基-7-甲氧基香豆素(10)对Hela细胞的抑制活性(IC50=28.58μmol/L),高于阳性对照药物顺铂(IC50=41.25μmol/L),具有进一步研究开发的价值.     

烯菌酮对小鼠前列腺癌细胞增殖及其脂质过氧化物含量和抗氧化物酶活性的影响

为研究烯菌酮对小鼠前列腺癌(RM-1)细胞增殖及其脂质过氧化物和抗氧化物酶的影响,实验采用了四唑盐法(3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide,MTT)检测了RM-1细胞增殖活力,采用比色法测定了其细胞内抗氧化物酶活性和脂质过氧化物(Maleic Dialdehyde,MDA)含量的改变。结果表明,0.01μmol/L、1μmol/L和100μmol/L三个浓度的烯菌酮作用24和48 h,RM-1细胞增殖活力均明显低于对照组。100μmol/L烯菌酮作用48 h,小鼠前列腺癌细胞中脂质过氧化物含量明显高于对照组及0.01μmol/L和1μmol/L两个浓度组。烯菌酮作用24、48和72 h,RM-1细胞中总超氧化物歧化酶(Superoxide Dismutase SOD)和谷胱甘肽过氧化物酶(Glutathione peroxidase,GSH-PX)活性随烯菌酮浓度增加而增加,具有浓度依赖性。0.01μmol/L、1μmol/L和100μmol/L烯菌酮作用24 h时,RM-1细胞中过氧化氢酶(Catalase,CAT)活性明显低于对照组,但随着烯菌酮浓度增加,CAT活性明显增加。100μmol/L烯菌酮作用48和72 h时,RM-1细胞中CAT活性明显高于其他三组。这说明,烯菌酮能抑制RM-1细胞增殖活力,促进其细胞内脂质过氧化物的含量和抗氧化物酶的活性。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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