β-Carotene_COA_25420_MedChemExpress
脱氧雪腐镰刀菌烯醇免疫亲和柱
脱氧雪腐镰刀菌烯醇免疫亲和柱介绍脱氧雪腐镰刀菌烯醇免疫亲和柱是一种用于分离和富集脱氧雪腐镰刀菌烯醇(DAE)的柱子。
脱氧雪腐镰刀菌烯醇是一种具有抗菌和抗肿瘤活性的天然产物,由脱氧雪腐镰刀菌(strain XCC5085)产生。
该化合物对多种细菌和肿瘤细胞具有明显的生物活性,因此成为药物研发领域的热门研究对象。
原理脱氧雪腐镰刀菌烯醇免疫亲和柱基于免疫亲和层析技术,利用特异性抗体与脱氧雪腐镰刀菌烯醇结合的原理,实现对脱氧雪腐镰刀菌烯醇的分离和富集。
主要包括以下步骤:1.样品预处理:将待分离的样品进行预处理,如固态提取、液液分配等方法,以获得待测物的纯化样品。
2.列柱:将经过预处理后的样品加载到脱氧雪腐镰刀菌烯醇免疫亲和柱中,保留待测物,去除杂质。
3.柱洗脱:通过洗脱缓冲液,去除非特异结合的样品成分,进一步提高分离纯度。
4.洗脱:以适量洗脱溶液洗脱目标物质,收集目标物质。
优势脱氧雪腐镰刀菌烯醇免疫亲和柱作为一种分离和富集脱氧雪腐镰刀菌烯醇的工具,在药物研发和其他相关领域具有以下优势:1.高选择性:通过使用特异性抗体,可以选择性地富集目标物质,提高检测灵敏度。
2.高效性:利用免疫亲和层析技术,可以在较短时间内完成样品的富集和分离。
3.可逆性:柱子可以多次使用,减少实验成本。
4.广泛适用性:脱氧雪腐镰刀菌烯醇免疫亲和柱可以应用于不同样品类型的分离和富集,如生物组织、血清、尿液等。
应用脱氧雪腐镰刀菌烯醇免疫亲和柱在药物研发和生命科学研究中有广泛的应用,包括但不限于以下领域:1. 新药研发•利用脱氧雪腐镰刀菌烯醇免疫亲和柱,可以富集和分离脱氧雪腐镰刀菌烯醇,用于新药研发的初步筛选和评价。
•结合质谱等分析方法,可以进一步分析脱氧雪腐镰刀菌烯醇的结构、性质等,为新药研发提供有力的支持。
2. 生物样品分析•脱氧雪腐镰刀菌烯醇免疫亲和柱可以用于生物样品中脱氧雪腐镰刀菌烯醇的富集和分离,如血清、组织标本。
•结合其他分析方法,可以对样品中脱氧雪腐镰刀菌烯醇进行定量检测和分析,为临床和生物研究提供数据支持。
马尾松树皮提取物抗肿瘤作用的研究
马尾松树皮提取物抗肿瘤作用的研究郑光耀;李若达;王成章;谢衡;叶建中;高彩霞【期刊名称】《林产化学与工业》【年(卷),期】2007(27)4【摘要】研究马尾松树皮提取物(MPBE)体外和体内的抗肿瘤作用.采用四甲基偶氮唑蓝比色(MTT)法观察MPBE对人结肠腺癌细胞株LoVo的体外抑制作用,采用小鼠移植性肿瘤模型考察MPBE对S180荷瘤小鼠的抑瘤作用和艾氏腹水癌(EAC)小鼠的生命延长作用.结果表明:MPBE对LoVo细胞的生长有较强的抑制作用,在质量浓度为 500 mg/L 时,MPBE对LoVo细胞作用24、48和 72 h 时的抑制率分别为19.83 %、33.06 % 和 58.15 %;MPBE对小鼠S180肉瘤生长表现出明显的抑制作用,MPBE 50、100和 200 mg/kg 3个剂量的抑瘤率分别为30.3 %、37.8 % 和 42.3 %,MPBE达到 200 mg/kg 剂量时,反映免疫功能的胸腺指数和脾指数也明显增加;但MPBE对EAC腹水癌小鼠的生存时间没有明显的延长作用.【总页数】5页(P16-20)【作者】郑光耀;李若达;王成章;谢衡;叶建中;高彩霞【作者单位】中国林业科学研究院,林产化学工业研究所;国家林业局,林产化学工程重点开放性实验室,江苏,南京,210042;广东嵩珍营养源研究所,广东,乐昌,512229;中国林业科学研究院,林产化学工业研究所;国家林业局,林产化学工程重点开放性实验室,江苏,南京,210042;广东嵩珍营养源研究所,广东,乐昌,512229;中国林业科学研究院,林产化学工业研究所;国家林业局,林产化学工程重点开放性实验室,江苏,南京,210042;中国林业科学研究院,林产化学工业研究所;国家林业局,林产化学工程重点开放性实验室,江苏,南京,210042【正文语种】中文【中图分类】TQ424.19;O532.23【相关文献】1.东魁杨梅树皮不同提取物体内外抗肿瘤作用的实验研究 [J], 刘霞;戴关海;童晔玲;任泽明;陈璇;杨锋2.马尾松树皮提取物抗肿瘤作用的实验研究 [J], 张锦宏;冯冬茹;刘兵;戚康标;刘炎明;王宏斌;谢衡;李若达;王金发3.马尾松树皮提取物对牙本质小管的封闭效果及其耐磨损性能的体外研究 [J], 唐成芳;杨黎燕;曾辉;马新扬;王萌;李经纬4.马尾松树皮提取物(MPBE)抗肿瘤作用的研究报告 [J], 崔映宇;王金发5.桦树皮提取物抗肿瘤作用实验研究 [J], 韩淑英;宗瑞义;李岩;王志路因版权原因,仅展示原文概要,查看原文内容请购买。
安捷伦产品目录
15
Real-Time PCR
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Mx3000P QPCR System
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Brilliant III Ultra-Fast SYBR Green QPCR and QRT-PCR Reagents
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Brilliant III Ultra-Fast QPCR and QRT-PCR Reagents
Agilent / STRATAGENE
Agilent website: /genomics
Welgene | Agilent Stratagene
威健股份有限公司 | Stratagene 總代理
Table of Content
Table of Contents
/ XL1-Red Competent Cells SoloPack Gold Supercompetent Cells
/ TK Competent Cells Specialty Cells
/ Classic Cells / Fine Chemicals For Competent Cells
適用於 UNG 去汙染或 bisulphite
sequencing
適用於 TA Cloning
最高敏感性
取代傳統 Taq 的好選擇
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2
威健股份有限公司 | Stratagene 總代理
PCR Enzyme & Instrument
Agilent SureCycler 8800
市場上領先的 cycling 速度和 sample 體積 10 ~ 100 μL 簡易快速可以選擇 96 well 和 384 well 操作盤 優秀的溫控設備讓各個 well 都能保持溫度的穩定 七吋的高解析度觸控螢幕讓操作上更為簡便 可以透過網路遠端操控儀器及監控儀器 Agilent 專業的技術支援可以幫助您應對各種 PCR 的問題
CHIR-99021_DataSheet_MedChemExpress
Inhibitors, Agonists, Screening Libraries Data SheetBIOLOGICAL ACTIVITY:CHIR–99021 is a GSK–3α/β inhibitor with IC 50 of 10 nM/6.7 nM; > 500–fold selectivity for GSK–3 versus its closest homologs CDC2 and ERK2, as well as other protein kinases.IC50 & Target: IC50: 10 nM/6.7 nM (GSK–3α/β)[1]In Vitro: CHIR 99021inhibits human GSK–3β with K i values of 9.8 nM [1]. CHIR 99021 is a small organic molecule that inhibits GSK3α and GSK3β by competing for their ATP–binding sites.In vitro kinase assays reveal that CHIR 99021 specifically inhibits GSK3β (IC 50=~5 nM) and GSK3α (IC 50=~10 nM), with little effect on other kinases [2]. In the presence of CHIR–99021 the viability of the ES–D3 cells is reduced by 24.7% at 2.5 μM, 56.3% at 5 μM, 61.9% at 7.5 μM and 69.2% at 10 μM CHIR–99021 with an IC 50 of 4.9μM [3].In Vivo: In ZDF rats, a single oral dose of CHIR 99021 (16 mg/kg or 48 mg/kg) rapidly lowers plasma glucose, with a maximal reduction of nearly 150 mg/dl 3–4 h after administration [1]. CHIR99021 (2 mg/kg) given once, 4 h before irradiation, significantly improves survival after 14.5 Gy abdominal irradiation (ABI). CHIR99021 treatment significantly blocks crypt apoptosis andaccumulation of p–H2AX + cells, and improves crypt regeneration and villus height. CHIR99021 treatment increases Lgr5+ cellsurvival by blocking apoptosis, and effectively prevents the reduction of Olfm4, Lgr5 and CD44 as early as 4 h [4].PROTOCOL (Extracted from published papers and Only for reference)Kinase Assay:[2]Kinases are purified from SF9 cells through use of their His or Glu tag. Glu–tagged proteins are purified, and His–tagged proteins are purified. Kinase assays are performed in 96–well plates with appropriate peptide substrates in a 300–μL reaction buffer (variations on 50 mM Tris–HCl, pH 7.5, 10 mM MgCl 2, 1 mM EGTA, 1 mMdithiothreitol, 25 mMβ–glycerophosphate, 1mM NaF, and 0.01% bovine serum albumin). Peptides has K m values from 1 to 100 μM. CHIR 99021 or CHIR GSKIA is added in 3.5μL of Me 2SO, followed by ATP to a final concentration of 1 μM. After incubation, triplicate 100–μL aliquots are transferred to Combiplate 8 plates containing 100 μL/well of 50 μM ATP and 20 mM EDTA. After 1 hour, the wells are rinsed five times with phosphate–buffered saline, filled with 200 μL of scintillation fluid, sealed, and counted in a scintillation counter 30 min later. All of the steps are at room temperature. The percentage of inhibition is calculated as 100×(inhibitor–no enzyme control)/(Me 2SO control–no enzyme control)[2].Cell Assay: CHIR 99021 is dissolved in DMSO and stored, and then diluted with appropriate media before use [3].[3]The viability of the mouse ES cells is determined after exposure to different concentrations of GSK3 inhibitors for three days using the MTT assay.The decrease of MTT activity is a reliable metabolism–based test for quantifying cell viability; this decrease correlates with the loss of cell viability. 2,000 cells are seeded overnight on gelatine–coated 96–well plates in LIF–containing ES cell medium. On the next day the medium is changed to medium devoid of LIF and with reduced serum and supplemented with 0.1–1 μM BIO, or 1–10 μM SB–216763, CHIR–99021 or CHIR–98014. Basal medium without GSK3 inhibitors or DMSO is used as control. All tested conditions are analyzed in triplicates [3].Product Name:CHIR–99021Cat. No.:HY-10182CAS No.:252917-06-9Molecular Formula:C 22H 18Cl 2N 8Molecular Weight:465.34Target:GSK–3; GSK–3; Autophagy Pathway:Stem Cell/Wnt; PI3K/Akt/mTOR; Autophagy Solubility:DMSO: ≥ 5.1 mg/mLAnimal Administration: CHIR 99021 is formulated as solutions in 20 mM citrate–buffered 15% Captisol or as fine suspensions in0.5% carboxymethylcellulose (Rat)[1].CHIR 99021 is prepared in DMSO and diluted (Mice)[4].[1][4]Rat[1]Primary hepatocytes from male Sprague Dawley rats that weighed <140 g are prepared and used 1–3 h after isolation. Aliquotsof 1×106cells in 1 mL of DMEM/F12 medium plus 0.2% BSA and CHIR 99021(orally at 16 or 48 mg/kg) or controls are incubated in 12–well plates on a low–speed shaker for 30 min at 37°C in a CO2–enriched atmosphere, collected by centrifugation and lysed by freeze/thaw in buffer A plus 0.01% NP40; the GS assay is again performed.Mice[4]Mice 6–10 weeks old are used. The PUMA+/+ and PUMA–/– littermates on C57BL/6 background (F10) and Lgr5–EGFP(Lgr5–EGFP–IRES–creERT2) mice are subjected to whole body irradiation (TBI), or abdominal irradiation (ABI). Mice are injected intraperitoneally (i.p.) with 2 mg/kg of CHIR99021 4 h before radiation or 1 mg/kg of SB415286 28 h and 4 h before radiation. Mice are sacrificed to collect small intestines for histology analysis and western blotting. All mice are injected i.p. with 100 mg/kg of BrdU before sacrifice.References:[1]. Ring DB, et al. Selective glycogen synthase kinase 3 inhibitors potentiate insulin activation of glucose transport and utilization in vitro and in vivo. Diabetes. 2003 Mar;52(3):588–95.[2]. Bennett CN, et al. Regulation of Wnt signaling during adipogenesis. J Biol Chem. 2002 Aug 23;277(34):30998–1004.[3]. Naujok O, et al. Cytotoxicity and activation of the Wnt/beta–catenin pathway in mouse embryonic stem cells treated with four GSK3 inhibitors.BMC Res Notes. 2014 Apr 29;7:273.[4]. Wang X, et al. Pharmacologically blocking p53–dependent apoptosis protects intestinal stem cells and mice from radiation. Sci Rep. 2015 Apr 10;5:8566.Caution: Product has not been fully validated for medical applications. For research use only.Tel: 609-228-6898 Fax: 609-228-5909 E-mail: tech@Address: 1 Deer Park Dr, Suite Q, Monmouth Junction, NJ 08852, USA。
医学词典
医学词典.txt人和人的心最近又最远,真诚是中间的通道。
试金可以用火,试女人可以用金,试男人可以用女人--往往都经不起那么一试。
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androblastoma男性母细胞瘤androgen雄激素Anesthetist麻醉医师aneuploid非整倍体angiostatin血管抑制素anitratum硝酸盐阴性(不动杆菌)anovulation不排卵anteflexion前屈antibody抗体antigen抗原antineoplaston抗肿瘤治疗antiretroviral抗逆转录病毒的antisignaling抗信号药物appendix阑尾approximation对合arabitin阿糖腺苷,腺嘌呤阿糖甙Aredia阿可达,帕米膦酸钠(pamidronate)的商品名,Novartis公司出品arimedex芳香化酶抑制剂arimidex新的芳香化酶抑制剂arteriography动脉造影atelectasis肺不张atopic变态反应性autocrineloops自泌环autoinvasive自身侵袭性autosome常染色体AY62013环氧甘醚,乙环氧啶azimexone羧胺氰丙啶(BRMs)B16黑色素瘤细胞系(小鼠)BAK椎体间融合器Ball公司名称;波尔公司;金属制品;网址baseline基线baumanii鲍曼不动杆菌BCDFB细胞分化因子(BRMs)bednet臭虫behavior行为Bel7402人肝癌细胞系Biaoroubixing表阿霉素bioassay生物测定biopsy活检boolean布尔bromoacetoxylphenylhexan溴乙酰己烷雌酚,内消旋3bromodeoxyuridine溴脱氧尿嘧啶,在DNA合成过程中渗入细胞,用于作为进入或经历DNA合成期(S期)的标记,代表DNA合成水平bronchicanis支气管败血症(Bordetella bronchiseptica支气管败血症博代氏菌)BSLi西非单叶豆凝集素,对B型血球专一BSN次硝酸铋(诱导正常组织产生金属硫蛋白,降低化疗药物毒性);bowel sounds normal 肠鸣音正常BTIC氯乙基三氮烯咪唑酰胺BU2231A泰来霉素(博莱霉素衍生物,是一种霉菌产生的糖肽化合物)C12U核酸抗癌剂干扰素诱导剂cabergoline卡麦角林(镇痛药)cackexia恶液质CAI羧基胺基咪唑,是一种细胞信号传导抑制剂,能够阻滞配体受体依赖性Ca2+的内流,改变包括内皮细胞在内的多种细胞的生物行为,如运动、侵袭、酶解和构建血管等,在体内外抑制血管形成calciifolinas亚叶酸calcoacelicus醋酸钙(不动杆菌)Calprotectin钙卫蛋白:钙卫蛋白是近年发现的与钙结合的不均一的复合蛋白质,由2重链及1轻链构成,主要来源于嗜中性粒细胞和单核细胞,分布于粒单细胞、上皮细胞、角质细胞内及各种组织和体液中,具有抗微生物、抗增殖等多种生物学功能。
exatecan化学结构
exatecan化学结构
Exatecan(又称DX-8951或DX-8951f)是一种拓扑异构酶抑制剂,属于环状紫杉醇类化合物。
它的化学结构包括一个喹啉环和一个环戊二烯基环。
具体来说,它是一种环戊二烯基喹啉酮衍生物,其化学名称为(7S,9aS)-7-[(S)-sec-butyl]-9a-ethyl-6,9a-dihydro-7H-pyrrolo[2,3-d]carbazole-8,10(7H)-dione。
这种化合物具有抗肿瘤活性,并且正在进行临床试验,以探索其在癌症治疗中的潜在用途。
从化学结构上来看,Exatecan的分子式为C24H25N3O2,相对分子质量为387.47克/摩尔。
它的结构中含有多个手性中心,因此存在立体异构体。
这些结构特征对于理解其药理学和药代动力学性质以及与生物体内相互作用的方式至关重要。
总的来说,Exatecan作为一种拓扑异构酶抑制剂,具有复杂而精密的化学结构,这使得它成为潜在的抗肿瘤药物,并且对于研究人员来说,深入了解其化学结构对于揭示其药理学特性和临床应用具有重要意义。