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- 详细信息
- 文献和实验
- 技术资料
- 库存:
23
- 英文名:
Doxycycline hyclate
- CAS号:
24390-14-5
- 供应商:
上海莼试
- 保存条件:
4°C, protect from light
- 规格:
100mg 1g 5g 50g 100g
| 产品名称 | Doxycycline hyclate | 产品货号 | CS-01Y64752 |
| 规格 | 100mg 1g 5g 50g 100g | CAS号 | 24390-14-5 |
| 含量 | >98.00% | 分子式 | C22H24N2O8.HC |
| 分子量 | 480.9 | 用途 | 仅供科研研究使用 |
Doxycycline hyclate规格:100mg 1g 5g 50g 100g
CAS:24390-14-5
别名:N/A
化学名:(4S,4aR,5S,5aR,6R,12aR)-4-(dimethylamino)-1,5,10,11,12a-pentahydroxy-6-methyl-3,12-dioxo-3,4,4a,5,5a,6,12,12a-octahydrotetracene-2-carboxamide hydrochloride
分子式:C22H24N2O8.HC
分子量:480.9
溶解度:≥ 22.15 mg/mL in DMSO, ≥ 49.2 mg/mL in H2O with ultrasonic
储存条件:4°C, protect from light
General tips:For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.
Shipping Condition: Evaluation sample solution : ship with blue ice All other available size: ship with RT , or blue ice upon request
产品描述:
Doxycycline hyclate is an antibiotic [1].Doxycycline hyclate is a derivative of tetracycline and possesses the activities of anti-inflammatory and antimicrobial. Doxycycline inhibits dengue virus replication in vitro with a temperature-dependent manner. The IC50 value is 52.3μM at 37°C and 26.7μM at 40°C. It inhibits the dengue virus via inhibiting the NS2B-NS3 serine protease of the virus. 60μM doxycycline reduces the CPE of the DNEV2-infected cells [1].Doxycycline is found to be an inhibitor of MMP. Doxycycline treatment reduces MMP-8 and -9 levels and inhibits expression of tissue MMP-2 and MMP-9. Moreover, treatment with doxycycline significantly reduces the incidence of intracranial aneurysms. Doxycycline has also been reported to be an anti-inflammatory agent based on its inhibition of matrix metalloproteinases. In addition, doxycycline has potent antimalarial activity with IC50 value of 320nM at 96h in vitro [2, 3].References:[1] Rothan HA, Mohamed Z, Paydar M, Rahman NA, Yusof R. Inhibitory effect of doxycycline against dengue virus replication in vitro. Arch Virol. 2014 Apr;159(4):711-8.[2] Maradni A, Khoshnevisan A, Mousavi SH, Emamirazavi SH, Noruzijavidan A. Role of matrix metalloproteinases (MMPs) and MMP inhibitors on intracranial aneurysms: a review article. Med J Islam Repub Iran. 2013 Nov;27(4):249-254.[3] Draper MP, Bhatia B, Assefa H, Honeyman L, Garrity-Ryan LK, Verma AK, Gut J, Larson K, Donatelli J, Macone A, Klausner K, Leahy RG, Odinecs A, Ohemeng K, Rosenthal PJ, Nelson ML. In vitro and in vivo antimalarial efficacies of optimized tetracyclines. Antimicrob Agents Chemother. 2013 Jul;57(7):3131-6.
使用方法:
1. 常用筛选浓度
注意:用来筛选稳转株的工作浓度需要根据细胞类型,培养基,生长条件和细胞代谢率而变化,推荐使用浓度为50-1000μg/mL。对于第一次使用的实验体系建议通过建立杀灭曲线(kill curve),即剂量反应性曲线,来确定最佳筛选浓度。
一般而言,哺乳动物细胞50-500μg/mL;细菌/植物细胞20-200μg/mL;真菌300-1000μg/mL。
2. 杀灭曲线的建立
注意:为了筛选得到稳定表达目的蛋白的细胞株,需要确定能够杀死未转染宿主细胞的抗生素浓度,可通过建立杀灭曲线(剂量反应曲线)来实现,至少选择5个浓度。
1) 第一天:未转化的细胞按照20-25%的细胞密度铺在合适的培养板上,37℃,CO2培养过夜;注:对于需要更高密度来检测活力的细胞,可增加接种量。
2) 根据细胞类型,设定合适范围内的浓度梯度。以哺乳动物细胞为例,可设定50,100,250,500,750,1000μg/mL。先用去离子水或者PBS buffer按照1:10的比例将母液稀释到5 mg/ml,然后按照下表稀释到相应浓度的工作液。
3) 第二天:替换旧的培养基,换用新鲜配制的含有相应浓度药物的培养基。每个浓度做三个平行孔。
4) 接下来每3-4天更换新的含药物培养基。
5) 按照固定的周期(如每2天)进行活细胞计数来确定阻止未转染细胞生长的恰当浓度。选择在理想的天数(通常是7-10天)内能够杀死绝大多数细胞的浓度为稳定转染细胞筛选用的工作浓度。
3. 稳定转染细胞的筛选
1) 转染48h后,用含有适当浓度的潮霉素B筛选培养基来传代细胞(直接传代或者稀释后传代)。
注意:细胞处于活跃分裂状态时抗生素的杀伤。则当细胞过于稠密,其效率会降低。为了得到较好的筛选效果,最好将细胞稀释至丰度不超过25%
2) 每隔3-4天更换含有药物的筛选培养液。
3) 筛选7天后观察并评估细胞克隆(集落)的形成情况。集落的形成可能还需要一周或者更多的时间,这取决于宿主细胞类型,转染,以及筛选效果。
4) 挑取并转移5-10个抗性克隆于35mm细胞培养板,继续用含药物的筛选培养液维持培养7天。
5) 之后更换正常培养基培养即可。
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蛋白酶抑制剂混合物实验步骤:
(1)实验开始前将RNA提取液于65℃水浴锅中预热,离心管中加入ME(巯基乙醇),(10mL加80ul,50mL中加入300ul)
(2)取约0.8g菌丝体(液体培养获得的菌丝用真空抽滤即可!固体培养就更好说了),在液氮中迅速磨成精细粉末,装入50mL离心管,按1g材料8mL的量加入预热的RNA提取液,颠倒混匀
(3)65℃水浴3-10 min,期间混匀2-3次
(4)加入等体积的酚(注意是酸酚pH4.5)::yi戊醇(25:24:1)抽提(10,000rpm,4℃,5 min)
(5)取上清,等体积的yi戊醇(24:1)抽提(10,000rpm,4℃,5 min)
(6)加入1/4V体积10M LiCl溶液,4℃放置6h以上(或过夜)
(7)10,000rpm,4℃离心20min
(8)弃上清,用500ul SSTE溶解沉淀
(9)酚::yi戊醇(25:24:1)抽提两次,:yi戊醇(24:1)抽提1次(10,000rpm,4℃,5min)
(10)加2V体积的无水乙醇,在-70℃冰箱沉淀30min以上
(11)12,000rpm,4℃离心20 min
(12)弃上清.沉淀用70%酒精漂洗一次,干燥
(13)加200ul的DEPC处理水溶解
(14)用非变性琼脂糖凝胶电泳和紫外分光光度计扫描检测RNA的质量(在抽提过程中,若蛋白质含量或其它的杂质还较多,可以增加抽提次数)
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文献和实验Doxycycline Regulated Lentiviral Vectors
Lentiviral vectors are a powerful tool to achieve regulated expression of transgenes in vivo and in vitro. The doxycycline-inducible system is well characterized and can be used to regulate expression mediated by lentiviral vectors
a doxycycline-inducible floxed Cre, which replaces itself with an incoming floxed gene of interest. The derivative cell lines, selected in G418, thus bear doxycycline-inducible transgenes. We provide detailed methods for performing ICE recombination
Extrachromosomal Inducible Expression
Inducible expression systems are very convenient for proteins that induce strong side effects such as retardation of growth or development and are essential for the expression of toxic proteins. In this chapter we describe the doxycycline
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