4-Methylumbelliferyl Oleate是一种在被脂肪酶切割后可释放4-甲基伞形酮(4-MU; Ex/Em: 320/450nm)的荧光底物,激发波长依赖于pH值(pH 4.6时为330nm,pH 7.4时为370nm,pH 10.4时为385nm),被广泛应用于生物样本中酸性和碱性脂肪酶活性的检测。
Cas No.:18323-58-5
Sample solution is provided at 25 µL, 10mM.
4-Methylumbelliferyl Oleate is a fluorogenic substrate that releases 4-methylumbelliferone (4-MU; Ex/Em: 320/450nm) upon cleavage by lipases, features a pH-dependent excitation wavelength (330nm at pH 4.6, 370nm at pH 7.4, and 385nm at pH 10.4), and is widely used for detecting acid and alkaline lipase activity in biological samples[1,2,3]. 4-Methylumbelliferyl Oleate offers high sensitivity, produces a blue fluorescent signal upon hydrolysis, and is suitable for lipase kinetic studies and the screening of lipase inhibitors (e.g., pancreatic lipase)[4,5,6].
Reference:
[1] ZHANG J, KANG M J, KIM M J, et al. Pancreatic lipase inhibitory activity of taraxacum officinale in vitro and in vivo[J]. Nutrition Research and Practice, 2008, 2(4): 200-203.
[2] KOSTER J F, VAANDRAGER H, VAN BERKEL T J C. Study of the hydrolysis of 4-methylumbelliferyl oleate by acid lipase and cholesteryl oleate by acid cholesteryl esterase in human leucocytes, fibroblasts and liver[J]. Biochimica et Biophysica Acta (BBA)-Lipids and Lipid Metabolism, 1980, 618(1): 98-105.
[3] SHIMURA S, TSUZUKI W, SUZUKI T. Determination of lipase activity in organic solvent using fluorescent substrate and its application to the screening of lipase inhibitor[J]. Analytical Sciences, 1991, 7(1): 15-18.
[4] ZHANG J, YANG Y, QIAN X K, et al. Design, Synthesis, and Structure-Activity Relationship Study of Pyrazolones as Potent Inhibitors of Pancreatic Lipase[J]. ChemMedChem, 2021, 16(10): 1600-1604.
[5] NYFELER E, GROGNUX J, WAHLER D, et al. A sensitive and selective high‐throughput screening fluorescence assay for lipases and esterases[J]. Helvetica Chimica Acta, 2003, 86(8): 2919-2927.
[6] SOSNOWSKA D, PODSĘDEK A, KUCHARSKA A Z, et al. Comparison of in vitro anti-lipase and antioxidant activities, and composition of commercial chokeberry juices[J]. European Food Research and Technology, 2016, 242(4): 505-515.
4-Methylumbelliferyl Oleate是一种在被脂肪酶切割后可释放4-甲基伞形酮(4-MU; Ex/Em: 320/450nm)的荧光底物,激发波长依赖于pH值(pH 4.6时为330nm,pH 7.4时为370nm,pH 10.4时为385nm),被广泛应用于生物样本中酸性和碱性脂肪酶活性的检测[1,2,3]。4-Methylumbelliferyl Oleate灵敏度高,水解后产生蓝色荧光信号,适用于脂肪酶动力学研究及脂肪酶抑制剂筛选(如胰腺脂肪酶)等领域[4,5,6]。
使用4-Methylumbelliferyl Oleate测定艾叶提取物对胰脂肪酶的抑制活性[1]:
(1)在黑色96孔板中加入25μL不同浓度的艾叶样品溶液和25μL胰脂肪酶(1mg/mL)溶液,在37℃下预孵育10min。
(2)加入50μL 4-Methylumbelliferyl Oleate(1mM)启动反应,在37℃下孵育20min。
(3)加入100μL 0.1M柠檬酸缓冲液(pH 4.2)终止反应。
(4)使用荧光酶标仪在激发波长355nm,发射波长460nm下检测释放的4-MU的荧光强度。
(5)根据对照组、空白组、样品组和背景组的荧光值计算抑制率,公式为:抑制率(%)= [1-(样品组荧光值-背景组荧光值)/(对照组荧光值-空白组荧光值)] × 100。
(6)通过IC50值(抑制胰脂肪酶活性50%)评估胰腺脂肪酶抑制活性。
Reference:
[1] CHANG Y, ZHANG D, YANG G, et al. Screening of anti-lipase components of Artemisia argyi leaves based on spectrum-effect relationships and HPLC-MS/MS[J]. Frontiers in Pharmacology, 2021, 12: 675396.
| Cas No. | 18323-58-5 | SDF | |
| 别名 | 4-甲基伞形酮油酸酯 | ||
| Canonical SMILES | O=C1C=C(C)C2=C(C=C(OC(CCCCCCC/C=C\CCCCCCCC)=O)C=C2)O1 | ||
| 分子式 | C28H40O4 | 分子量 | 440.6 |
| 溶解度 | Chloroform: 20 mg/ml,DMF: 10 mg/ml,DMSO: 0.1 mg/ml | 储存条件 | Store at -20°C |
| General tips | 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液;一旦配成溶液,请分装保存,避免反复冻融造成的产品失效。 储备液的保存方式和期限:-80°C 储存时,请在 6 个月内使用,-20°C 储存时,请在 1 个月内使用。 为了提高溶解度,请将管子加热至37℃,然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案:配备蓝冰进行发货。所有其他可用尺寸:配备RT,或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 2.2696 mL | 11.3482 mL | 22.6963 mL |
| 5 mM | 453.9 μL | 2.2696 mL | 4.5393 mL |
| 10 mM | 227 μL | 1.1348 mL | 2.2696 mL |
| 第一步:请输入基本实验信息(考虑到实验过程中的损耗,建议多配一只动物的药量) | ||||||||||
| 给药剂量 | mg/kg | 动物平均体重 | g | 每只动物给药体积 | ul | 动物数量 | 只 | |||
| 第二步:请输入动物体内配方组成(配方适用于不溶于水的药物;不同批次药物配方比例不同,请联系GLPBIO为您提供正确的澄清溶液配方) | ||||||||||
| % DMSO % % Tween 80 % saline | ||||||||||
| 计算重置 | ||||||||||
计算结果:
工作液浓度: mg/ml;
DMSO母液配制方法: mg 药物溶于 μL DMSO溶液(母液浓度 mg/mL,
体内配方配制方法:取 μL DMSO母液,加入 μL PEG300,混匀澄清后加入μL Tween 80,混匀澄清后加入 μL saline,混匀澄清。
1. 首先保证母液是澄清的;
2.
一定要按照顺序依次将溶剂加入,进行下一步操作之前必须保证上一步操作得到的是澄清的溶液,可采用涡旋、超声或水浴加热等物理方法助溶。
3. 以上所有助溶剂都可在 GlpBio 网站选购。
Quality Control & SDS
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- Purity: >98.00% Appearance: An oil
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