3D-QSAR Studies on the Anti-tumor Activity of N-Aryl-salicylamide Derivatives

In the present work,comparative molecular field analysis(CoMFA)techniques were used to perform three-dimensional quantitative structure-activity relationship(3D-QSAR)studies on the anti-tumor activity(pHi,i=1,2,3,4)of N-aryl-salicylamide derivatives against four cancer cell lines,including A549,MCF-7,SGC-7901,and Bel-7402.12 compounds were randomly selected as the training set to establish the prediction models,which were verified by the test set of 5 compounds containing template molecule.The contributions of steric and electrostatic fields to pH1,pH2,pH3,and pH4 were 23.8% and 76.2%,20.1% and 79.9%,18.7% and 81.3%,and 14.3%and 85.7%,respectively.The cross-validation(Rcv 2)and non-cross-validation coefficients(R2)were 0.826 and 0.963 for pH1,0.867 and 0.974 for pH2,0.941 and 0.989 for pH3,and 0.797 and 0.961 for pH4,respectively.The CoMFA models were then used to predict the activities of the compounds,and it was found that the models had strong stability and good predictability.Based on the CoMFA contour maps,some key structural factors responsible for the anticancer activity of the series of compounds were revealed.The results provide some useful theoretical references for understanding the mechanism of action,designing new N-aryl-salicylamide derivatives with high anti-tumor activity,and predicting their activities.

Synthesis and Anti-tumor Activity of Novel Amide Derivatives of Ursolic Acid

Ursolic acid was modified at C3 and C28 position to obtain fourteen derivatives including twelve novel compounds, and their chemical structures were characterized by IR, ^1H NMR and MS. Cell growth inhibitory effects of the derivatives against Hela cell were evaluated by MTT assay. All these derivatives were found to have stronger cell growth inhibitory than their parent compound, ursolic acid. The derivatives with a substituted acetyl group at C3 hydroxyl group show better activities than those with an unsubstituted hydroxyl group.

Characterization and Anti-tumor Activity of Glycopeptides from Ganoderma sinensis

The water-soluble part（GS） of Ganoderma sinense Zhao, Xu et Zhang was divided into high molecular（GS-H） and low molecular（GS-L） parts by Cellulose Super Filtration, and GS was also fractionated into four fractions, GS-1, 2, 3, and 4 by ethanol precipitation according to their molecular weights. Chemical analysis shows that GS and GS-1, 2, 3, 4 were complexes of polysaccharide and peptide. The fractions with molecular weights over 4000, GS-1, 2, 3, and GS-H show anti-tumor activities, however, the fractions with molecular weights lower than 4000, GS-4, and GS-L have no anti-tumor activity, indicating that the anti-tumor activity of Ganoderma Sinensis was caused by glucopeptides with molecular weight ranging from 4000 to 20000. Two purified glucopeptides, GS-6b and GS-7b were obtained from GS-H by ion-exchange and gel-permeation chromatography. Their molecular weights, glycosidic linkages, and configurations were detected by means of IR spectrum, sugar composition analysis, and methylation analysis. The polysaccharide parts of GS-6b and GS-7b had glucan backbone consisting of β-1→3 Glc, and side chain containing glucosyl, mannosyl, fucosyl, xylosyl, galactosyl, and glucuronic acid residues attached on 1-2, 1-4, 1-6 positions of the backbone of GS-6b, or 1-6, 1-4 positions of the backbone of GS-7b. The peptide parts in GS-6b and GS-7b were composed of 10 kinds of amino acids, including Asp, Ser, Arg, Gly, Thr, Pro, Ala, Val, Met, and Lys.

Preparation mechanism,physical characteristic and antitumor activity of nano-scheelite

After preparing the EU^3＋-doped scheelite nano-material by Pechini method with the nanoparticles of 30-50 nm in diameter, X-ray diffraction （XRD）, transmission electron microscopy （TEM） and high resolution transmission electron microscopy （HRTEM） were used to show a microcosmic description of the particle morphology and crystal structure. The spectrum signature of the nano-scheelite, which was taken by fluorescence spectrometer, was used to discuss the difference of luminescent performance between the nano-scheelite and bulk scheelite. The atomic site of the nano-scheelite was intuitively shown through HRTEM images and HRTEM simulated images from the relation between luminescent properties and crystal structure, which was analyzed by spectrum probe. The results of antitumor activity examined by the 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide （MTT） method show that the inhibition of human promyelocytic leukemia cell line （HL60） is enhanced immediately with increasing the concentration and presents a reliance on the quantity. The results of fluorescence spectra and structure show that the antitumor activity has something to do with micro-structure and surface charge.

Synthesis and Anti-tumor Activity of Novel Glycyrrhetinic Acid Derivatives

Twenty-five derivatives of glycyrrhetinic acid（GA） modified on the A-ring,at C30 and C11 positions were synthesized.Their in vitro cytotoxicity against various cancer cell lines[henrietta lacks strain of cancer cells（HeLa）,human hepatocellular liver carcinoma cells（HepG2） and human gastric carcinoma cells（BGC-823）] was evaluated by standard MTT[3-（4,5-dimethyl-2-thiazol-yl）-2,5-diphenyl-2H-tetrazolium bromide] assay.All the tested derivatives were found to have stronger cell growth inhibitory than their parent compound GA.Among them,compounds 3a,5a,and 8d have similar activity on HeLa cell line,and compound 8a has similar activity on HeLa,HepG2 and BGC-823 cell lines as Gefitinib.

Expression of Anti-CD4 Human/Murine Chimeric Antibody and Their Killer Tumor Activity

From the mouse hybridoma cell line secreting an anti-CD4 monoclonal antibody (McAb), total RNA was prepared. The VH and VL genes were amplified by RT-PCR with family specific primer pairs. The PCR products were cloned into pGEM-T vectors, then tranfected into JM109. The VH and VL genes were snalyzed by automatic DNA sequencer. According to Kabat classification, the VH and VL genes belong to the mouse ig heavy subgroup Ⅱ(A) and x chain subgroupⅢ, respectively. The VH and VL genes were subcloned into pr1-Expr and Pk Expr respectively, then transfected into XL2-Blue. The VH- Pr1 and VL- pk were trans feeted by electroporation into mouse myeloma cell X63Ag8. 653. The transfectoma cells were selected by G418 screening, and then supernatant of cultured transfectoma were analyzed by ELISA and immunofluorescence techniques.We have acquired transfectoma cells secreting anti-CD4 chimeric antibodies.These chimeric antibodies are able to kill tumor cells specifically in vitro.

Synthesis,Crystal Structure and Anti-tumor Activity of Ethyl 3-(4-methoxyphenyl)-4-oxo-3,3a,4,6-tetrahydro-1H-furo[3,4-c]pyran-3a-carboxylate

The title compound（ethyl 3-（4-methoxyphenyl）-4-oxo-3,3a,4,6-tetrahydro-1H-furo[3,4-c]pyran-3a-carboxylate） has been synthesized,and its crystal structure was characterized by X-ray single-crystal diffraction.The crystal belongs to monoclinic,space group P21/n,with a = 10.124（4）,b = 11.754（4）,c = 13.792（5） ,β = 111.533（3）o,V = 1526.6（10） 3,Z = 4,C17H19O6,Mr = 319.32,Dc = 1.389 g/cm3,F（000） = 676,λ（MoKα） = 0.71073 ,μ = 0.105 mm-1,R = 0.0660 and wR = 0.2027 for 2993 observed reflections（I 2σ（I））.The compound shows potent anti-tumor activity in vitro.

Influence of granulocyte-macrophage colonystimulating factor and tumor necrosis factor on anti-hepatoma activities of human dendritic cells

INTRODUCTIONDendritic cells (DCs) play a key regulatory role inantitumor immunity,especially in its immuneaccessory role via MHC-Ⅰ molecules.We haverecently reported that DCs were able to enhance thekilling activity of Lymphokine and PHA activatedkiller (LPAK) cells in vitro.In the presentstudy,we evaluated the effects of GM-CSF andTNF upon antitumor activities of freshly

Synthesis and Primary Research on Antitumor Activity of Three New Panaxadiol Fatty Acid Esters

For making use of Ginseng resources that exhibit an antitumor activity and for finding new anticancer drugs, three new fatty acid ester compounds： 3/β-acetoxy panaxadiol （ Ⅰ ）, 3β-palmitic acid aceloxy panaxadiol （ Ⅱ ） , and 3β-octadecanoic acid aceloxy panaxadiol（ Ⅰ , Ⅱ, and m） were synthesized with panaxadiol, diacetyl oxide, palmityl chloride and stearyl chloride, and their structures were determined via MS, ^13C NMR, IR, TLC, and so on. The molar yields of the three compounds are 75.14%, 79. 08%, and 72. 57%, respectively. Meanwhile, the antitumor activity of the three new panaxadiol fatty acid ester derivatives and panaxadiol was compared by using the method of MTT. Tumor cell used was Vero cell line. Positive control was 5-FU, blank was an RPMI1640 culture medium, negative control was an RPMI1640 culture medium and the solvent for drugs to be tested. Compound Ⅰ has the strongest antitumor activity followed by panaxadiol; compounds Ⅱ and Ⅲ have similar and weakest antitumor activities. Furthermore, the antitumor activities of the panaxadiol fatty acid ester derivatives show positive correlation with the concentration of the test group, but show no relationship with the molecular weight of fatty acid. The methods that are used to synthesize the three compounds with high yields and strong antitumor activities are simple and show a great potential for meeting the needs of industrial manufacture of these drugs.

Synthesis,Crystal Structure and Antitumor Activity of a New Coordination Polymer [Cd(C_(14)H_(10)N_3O_5)_2(C_5H_5N)_2]_n

A new cadmium coordination polymer,[Cd（C14H10N3O5）2（C5H5N）2]n,has been synthesized by the reaction of 2-hydroxy-N＇-（4-nitrobenzoyl）benzohydraizide with cadmium acetate in pyridine and ethanol mixture solution.Its molecular structure was characterized by elemental analysis,IR spectra and X-ray crystal structure determination.Crystal data for this compound：tetragonal,space group I41/a,Mr=871.10,a=16.960（6）,b=16.960（6）,c=28.612（6） ,V= 8230（4）3,Z=8,Dc=1.406 g·m-3 and F（000）=3536.the final R=0.0326,wR=0.0847 for 2682 observed reflections with I 〉 2σ（I） and R=0.0460,wR=0.0896 for all reflections.In the molecular structure of the complex,the cadmium atoms are coordinated to four N and two O atoms forming a slightly distorted octahedral geometry.The intermolecular hydrogen bonds link the neighboring molecules to form a coordination polymer which was then evaluated for its anti-tumor activities against two kinds of cell lines （K562 and BGC） by MTT method.A preliminary bioactivity study indicates that the complex has distinct inhibitory effect on K562 cell lines.

Synthesis and Anti-Tumor Activities of Fluoride-Containing Gossypol Derivatives Compounds

We report herein the design and synthesis of a series of novel fluoride-containing gossypol derivatives by the condensation reaction of gossypol with fluoride-containing aromatic amine. These fluoride-containing gossypol derivatives were characterized by IR, 1H-NMR and high resolution mass spectral data, then screened as antitumor agents against three human cancer cell lines (HeLa, A-549 and BGC-823) and a normal cell line (VEC) in vitro by using MTT cell proliferation assays. Results revealed that compounds 3a, 3c and 3f exhibited superior anticancer activity against HeLa, compounds 3b,3c, 3e and 3f exhibited superior anticancer activity against A-549, compounds 3b, 3c and 3f exhibited superior anticancer activity against BGC-823 compared to gossypol. In particular, fluorine substituent at the para positions of the phenyl ring showed remarkable inhibitory effects on HeLa?(3c: IC50 = 14.2 μM, 3f:?IC50 = 8.34 μM), A-549(3c: IC50 = 6.32 μM, 3f: IC50 = 9.76 μM) and BGC-823 cells?(3c: IC50 = 8.62 μM, 3f: IC50 = 4.36 μM). Furthermore, all the compounds 3a-3f exhibited lessened cytotoxicity against VEC compared to gossypol.

miR-34a和米铂共载阳离子脂质体的构建及抗肿瘤活性研究

目的 构建共载miR-34a和米铂阳离子脂质体,以协同增效,用于肿瘤的化疗。方法 采用薄膜分散法制备米铂阳离子脂质体(MCL),将MCL与miR-34a共孵育,构建共载miR-34a和米铂的阳离子脂质体(MCL/miR-34a)。以粒径及多分散系数、电位、米铂含量和抗肿瘤活性为指标,对辅助磷脂(DOPE、DOPC、DMPC、DSPC、PC-98T)的种类、阳离子磷脂DOTAP/DOPE比、N/P、DSPE-mPEG2000及胆固醇用量进行筛选;选用磺酰罗丹明B染色法在细胞(人乳腺癌细胞系MDA-MB-231、人肝癌细胞系HepG2、人口腔表皮样癌细胞系KB和人胰腺癌细胞系As PC-1)水平评价MCL/miR-34a的抗肿瘤活性。结果 构建的MCL/miR-34a粒径均匀[(200±23)nm]且分布窄(PDI=0.242±0.01)、电位适宜[(45±8)m V]、包封率高(miR-34a的包封率99.2%,米铂的包封率99.8%),细胞水平上抗肿瘤活性显著优于单药米铂或mi R-34a。结论 成功构建的MCL/miR-34a可显著提高miR-34a和米铂的体外抗肿瘤活性,为核酸药物与小分子化疗药物共同递送提供新策略。

含吡唑酮基团的喹唑啉衍生物的合成及其作为EGFR/VEGFR-2双靶标酪氨酸激酶抑制剂

双靶标酪氨酸激酶抑制剂在克服药物抗性和减少药物毒副作用方面具有重要作用,本文设计并合成了含有吡唑酮基团的喹唑啉衍生物作为EGFR/VEGFR-2双靶标酪氨酸激酶抑制剂。目标化合物由喹唑啉中间体和吡唑酮中间体通过亲核取代反应合成。喹唑啉中间体以2,3,4-三羟基苯甲酸为原料,通过酯化、硝化、还原、氯化和环化等反应合成;吡唑酮中间体以4-取代苯基肼盐酸盐为原料,通过甲基化和氧化等反应合成。目标化合物通过^(1)H NMR、^(13)C NMR和HR-MS进行结构鉴定。分别采用ADP-Glo激酶活性检测方法和CCK-8法测定了目标化合物对EGFR和VEGFR-2的抑制活性以及对Hela细胞、A549细胞、HUVEC细胞的抗增殖活性,其对EGFR和VEGFR-2抑制活性IC_(50)值为10~899 nM,15~712 nM;对部分在分子水平测定表现出较高活性的化合物进行了抗增殖活性测定,所选定的化合物对人肺癌A549细胞的半抑制浓度IC_(50)值为10~267 nM,对人脐静脉内皮细胞HUVEC的半抑制浓度IC_(50)值为11~433 nM,对人宫颈癌细胞Hela细胞几乎没有表现出抑制活性。对在细胞和分子水平测试均表现出良好活性的化合物5l通过分子对接研究发现其能够很好地结合在EGFR激酶和VEGFR-2激酶的活性口袋中。本研究为发现EGFR和VEGFR-2双靶标小分子酪氨酸激酶抑制剂奠定了良好的基础。

基于薯蓣皂苷元催化合成N-甲基吲哚孕烯醇酮化合物及其抗肿瘤活性

利用N-甲基吲哚对类固醇药物的前驱体16-脱氢孕烯醇酮乙酸酯(16-DPA)的D环C16位进行修饰,采用ZrCl_4-乙酸乙酯廉价催化体系,合成了16个3β-乙酰氧基-16α-3'-吲哚孕烯醇酮化合物和6个3β-羟基-16α-3'-吲哚孕烯醇酮衍生物.该方法具有收率高、立体选择性好和底物适应性强等优点.通过噻唑蓝(MTT)比色法测试了22个化合物对三阴性乳腺癌细胞(MDA-MB-231)的抗肿瘤活性.初步测试结果表明, 3β-乙酰氧基-16α-3'-吲哚孕烯醇酮化合物6h和6i对MDA-MB-231癌细胞有较好的抑制活性,其半数抑制浓度(IC_(50))分别为18.07和23.22μmol/L;而化合物7a~7f均对MDA-MB-231癌细胞有较好的抑制活性,其中化合物7e的抗肿瘤活性最好,其IC_(50)为12.50μmol/L.目标化合物为药物筛选提供了一定的参考.

新型BCL-2抑制剂的设计、合成及活性评价

通过研究BGB-11417与靶蛋白结合的相互作用,创造性的在P2口袋引入并环,合成了6个结构新颖的BCL-2抑制剂,产物经1H NMR和MS确证。以时间分辨荧光共振能量转移法(TR-FRET)测定目标化合物对BCL-2蛋白及BCL-2突变蛋白G101V和D103Y的体外抑制活性。活性结果表明化合物A、化合物B和化合物D对BCL-2及其突变蛋白G101V和D103Y有较好的抑制活性,可为合成活性更高的BCL-2抑制剂提供参考。

Screening of Anti-tumor Effective Extracts from Sedum bulbiferum Makino and HPLC Determination of Quercetin and Kaempferol in This Herbal Medicine

[Objectives] To investigate the anti-tumor activity of Sedum bulbiferum Makino in vitro,and establish a HPLC method for determination of quercetin and kaempferol in S. bulbiferum. [Methods] The inhibitory activities of different extracts and total flavonoids of S. bulbiferum on proliferation of three kinds of cancer cells( Hep G2,EC109,SW480) were tested by MTT assay. HPLC method for determination of quercetin and kaempferol in S. bulbiferum was established. [Results]The growth and proliferation of the three kinds of cancer cells were all significantly inhibited by ethyl acetate fraction and total flavonoids isolated from S. bulbiferum. With each extraction concentration increasing,stronger anti-tumor activity was found. The linear ranges of quercetin and kaempferol were 0. 03-0. 36 μg( R = 0. 999 9) and0. 08-0. 96 μg( R = 0. 999 9),and the average recoveries were 98. 90%( RSD = 1. 15%) and 98. 27%( RSD = 1. 70%),respectively.[Conclusions]S. bulbiferum has significant anti-tumor activity in vitro. The HPLC method established was accurate,reproducible,and could be used for quality control of this crude drug.

Anti-tumor Immune Response Mediated by Newcastle Disease Virus HN Gene

Hemagglutinin-neuramidinase（HN） is one of the most important surface structure proteins of the Newcastle disease virus（NDV）. HN not only mediates receptor recognition but also possesses neuraminidase（NA） activity, which gives it the ability to cleave a component of those receptors, NAcneu. Previous studies have demonstrated that HN has interesting anti-neoplastic and immune-stimulating properties in mammalian species, including humans. To explore the application of the HN gene in cancer gene therapy, we constructed a Lewis lung carcinoma（LLC） solid tumor model using C57BL/6 mice. Mice were injected intratumorally with the recombinant adenovirus expressing HN gene（Ad-HN）, and the effect of HN was explored by natural killer cell activity assay, cytotoxic lymphocyte activity assay, T cell subtype evaluation, and Th1/Th2 cytokines analysis. The results demonstrate that HN not only can elicit clonal expansion of both CD4＋ and CD8＋ T cell populations and cytotoxic T lymphocyte（CTL） and killer cell response, but also skews the immune response toward Th1. Thus, vaccination with Ad-HN may be a potential strategy for cancer gene therapy.

人源抗c-Met单链抗体腹腔注射可抑制A549肺腺癌荷瘤小鼠移植瘤生长

目的 该实验旨在验证间质上皮转化单链抗体(Met scFv)在体内对皮下移植瘤裸鼠的抗肿瘤作用。方法 建立裸鼠肿瘤模型,皮下注射A549肺腺癌细胞,成瘤后通过腹腔注射IRDye680 LT N-羟基琥珀酰亚胺(NHS)酯标记的Met scFv,借助小动物成像仪进行实时监测以观察该抗体在荷瘤小鼠体内的动态分布情况,检测肿瘤组织细胞c-Met与抗体的亲和力,定期尾静脉注射Met scFv,观察肿瘤体积变化并绘制肿瘤生长曲线。免疫组织化学染色法检测Met scFv是否能有效结合肿瘤组织中的c-Met抗原。结果 裸鼠体内分布结果表明,在最初的3 h内,Met scFv主要分布于腹腔内。经过大约48 h,荧光信号开始在肿瘤组织中聚集。瘤体免疫组织化学染色结果显示,肿瘤组织中c-Met高表达;定期尾静脉注射Met scFv,可使小鼠瘤体生长明显减缓。结论 Met scFv在体内特异性识别肿瘤细胞且表现出显著的抗肿瘤活性。

Synthesis,Structure and Antitumor Activities of Tridccapeptide PSPP3 from Papaver Somniferum Pollen

Five analogs and five segments of the Papavor Somniferum pollen tridecapeptidePSPP3 were designed and synthesized by using solid-phase peptide synthesis method. Theirinhibitive activities to human liver tumor cell Bel-7402 were assayed by MTT method and theirsecondary structures in solution were determined by CD spectra. The relationship of the structureand activity was discussed.

PREPARATION AND CYTOLYTIC TUMOR ACTIVITY OF OSTEOSARCOMA TUMOR INFILTRATING LYMPHOCYTES IN VITRO

In this study, the isolation, purification and differentiation of tumor-lnflltratlng lymphocytes (TIL) from 6 fresh osteosarcoma specimens were achieved by discontinuous density gradient centrifugation. One specimen of the osteosarcoma TIL were enlarged in IL-2 for long time in vitro, reaching 28 days and their cytolytic activity against different tumor cell lines was Investigated. The experimental results indicated that the preparation of osteosarcoma TIL adopted by the mechanical means was simple, having higher purifity, keeping higher effects on killing NK- sensitive tumor cell lines and NK-insensitive tumor cell lines as well as rapid proliferation in vitro cultured in IL-2.