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Amplite 比色法鞘磷脂酶检测试剂盒 蓝色荧光

英文名称:Amplite® Colorimetric Sphingomyelinase Assay Kit *Blue Color*
产品参数
Ex (nm)-Em (nm)-
分子量-溶剂-
存储条件-
产品概述

Amplite 比色法鞘磷脂酶检测试剂盒 蓝色荧光是美国AAT Bioquest生产的用于检测鞘磷脂的试剂盒,鞘磷脂酶(SMase)是一种酶,负责将鞘磷脂(SM)切割成磷酸胆碱和神经酰胺。细胞中SMase的在细胞反应中起重要作用。已经基于它们的阳离子依赖性和佳作用pH鉴定了五种类型的鞘磷脂酶(SMase)。它们是溶酶体酸性SMase,分泌锌依赖性酸性SMase,镁依赖性中性SMase,镁依赖性中性SMase和碱性SMase。在这五种类型中,溶酶体酸性SMase和镁依赖性中性SMase被认为是细胞对应激反应中产生神经酰胺的主要候选物。

我们的Amplite 比色鞘磷脂酶检测试剂盒为检测中性SMase活性或筛选其抑制剂提供了一种灵敏的方法。 该试剂盒使用我们专有的Amplite Blue作为比色探针,间接定量鞘磷脂酶(SMase)水解鞘磷脂(SM)产生的磷酸胆碱。它可用于测量血液,细胞提取物或其他溶液中的SMase活性。655nm处的光吸收与磷酸胆碱的形成成比例,因此与SMase活性成比例。该试剂盒是一种优化的“混合和读数”分析,与HTS液体处理仪器兼容。百萤生物是AAT Bioquest的中国代理商,为您提供优质的Amplite 比色法鞘磷脂酶检测试剂盒 。 

 

适用仪器


光吸收酶标仪  
吸收: 655nm
推荐孔板: 透明底板
实验方案

96孔板测定示例

概述

准备鞘磷脂工作溶液(50μL)

添加SMase标准品和/或SMase测试样品(50μL)

在37°C孵育1-2小时

加入鞘磷脂酶工作溶液(50μL)

在室温下孵育持续1-2小时

监测655nm处的吸光度

注意:在开始实验之前,在室温下解冻每个试剂盒组分的一个小瓶(或瓶)。

 

溶液配制

1.储备溶液配制

1.1鞘磷脂酰胆碱酶标准储备溶液(10 U/mL):

将含有0.1%BSA的20µL PBS加入鞘磷脂酶标准品(组分F)瓶中,制成10units/mL鞘磷脂酶的标准储备溶液。

1.2Amplite™ UltraBlue储备溶液(200X):

向Amplite™UltraBlue ( C组分)瓶中加入100 μ L DMSO ( G组分),制成200 × Amplite™UltraBlue储备液。注:Amplite™Ultra Blue在硫醇(如DTT和2 -巯基乙醇等)存在下不稳定。反应中DTT或2 -巯基乙醇的终浓度应低于10 µ M,Amplite™Ultra Blue在高pH ( > 8.5 )下也不稳定。反应应在p H 7 ~ 8之间进行。

 

2.标准溶液配制

将1 µ L的10units/ mL的鞘磷脂酶标准储备液加入1000 µ L的检测缓冲液( E组分)中,生成10 mU / mL的鞘磷脂酶标准品。取10 m U / m L鞘磷脂酶标准品500 µ L,进行1∶2系列稀释,得到系列稀释的鞘磷脂酶标准品( SMase7 - SMase1)。注:稀释后的鞘磷脂酶标准储备液不稳定,应在4小时内使用。为方便起见,请使用串行稀释计算器:https://www.aatbio.com/tools/serial-dilution/13620

 

3.工作溶液配制

3.1.准备鞘磷脂工作液:

将50μL鞘磷脂(组分B)加入5mL SMase反应缓冲液(组分D)中,并充分混合。

注意:应及时使用鞘磷脂工作液。

3.2.鞘磷脂酰胆碱酶工作溶液:

在酶混合液(组分A )瓶中加入5 m L Assay Buffer (组分E ),混匀。在酶标混合液瓶中加入50 μ L 200X Amplite™Ultra Blue储备液,开始测定。注意:应及时使用鞘磷脂酶工作液,注意避光;较长时间的储存容易造成较高的检测背景。混合物的浑浊度正常;不会对检测性能产生干扰。

 

样本实验方案

表1.将鞘磷脂酶标准品和待测样品置于白色壁/透明底96孔微孔板中。Smase =鞘磷脂酶标准品( SMase1 ~ SMase7 , 0.078 ~ 5 mU / m L),Bl =空白对照,ts =待测样品。

BL BL TS TS
SMase1 SMase1 ... ...
SMase2 SMase2 ... ...
SMase3 SMase3    
SMase4 SMase4    
SMase5 SMase5    
SMase6 SMase6    
SMase7 SMase7    

表2 .每孔试剂组成。

体积 试剂
SMase1-SMase7 50μL 系列稀释液( 0.078 ~ 5m U / m L)
BL 50μL 缓冲液
TS 50μL 测试样品

1.按照表1和表2提供的布局制备鞘磷脂酶标准品( SMase )、空白对照( BL )和待测样品( TS )。对于384孔板,每孔使用25 µ L的试剂,而不是50 µ L。

2.向鞘磷脂酶标准品、空白对照、供试品各孔中加入鞘磷脂工作液50 µ L,使总测定体积为100 µ L /孔。对于384孔板,每孔加入25 µ L鞘磷脂工作液,总体积为50 µ L /孔。

3.反应混合物在37℃孵育1 - 2小时。

4.向鞘磷脂酶标准品、空白对照、待测样品各孔中加入50 µ L鞘磷脂酶工作液,使总测定体积为150 µ L /孔。对于384孔板,每孔加入25 µ L鞘磷脂酶测定工作液,总体积为75 µ L /孔。

5.反应混合物在室温下孵育1 - 2小时。

6.用酶标仪在655 nm处测定吸光度值。

 

试剂应用文献

A study on the targeting of ceramide metabolism by (-)-epicatechin gallate, catechin and quercetin in A-549 lung cancer cell line
Authors: Mashhadi Akbar Boojar, Masoud
Journal: Nova Biologica Reperta (2019): 275--283
 
Doxepin mitigates noise induced neuronal damage in primary auditory cortex of mice via suppression of acid sphingomyelinase/ceramide pathway
Authors: Su, Yu-Ting and Meng, Xing-Xing and Zhang, Xi and Guo, Yi-Bin and Zhang, Hai-Jun and Cheng, Yao-Ping and Xie, Xiao-Ping and Chang, Yao-Ming and Bao, Jun-Xiang
Journal: The Anatomical Record (2017)
 
Riccardin DN induces lysosomal membrane permeabilization by inhibiting acid sphingomyelinase and interfering with sphingomyelin metabolism in vivo
Authors: Li, Lin and Niu, Huanmin and Sun, Bin and Xiao, Yanan and Li, Wei and Yuan, Huiqing and Lou, Hongxiang
Journal: Toxicology and Applied Pharmacology (2016): 175--184
 
New Aspects of Silibinin Stereoisomers and their 3-O-galloyl Derivatives on Cytotoxicity and Ceramide Metabolism in Hep G2 hepatocarcinoma Cell Line
Authors: Mashhadi Akbar Boojar, Mahdi and Ejtemaei Mehr, Shahram and Hassanipour, Mahsa and Mashhadi Akbar Boojar, Masoud and Dehpour, Ahmad Reza
Journal: Iranian Journal of Pharmaceutical Research (2016): 421--433
 
Mitochondrial respiration controls lysosomal function during inflammatory T cell responses
Authors: Baixauli, Francesc and Acín-Pérez, Rebeca and Villarroya-Beltrí, Carolina and Mazzeo, Carla and Nunez-Andrade, Norman and Gab, undefined and é-Rodriguez, Enrique and Ledesma, Maria Dolores and Blázquez, Alberto and Martin, Miguel Angel and Falcón-Pérez, Juan Manuel and others, undefined
Journal: Cell metabolism (2015): 485--498
 
The ATP-binding cassette transporter-2 (ABCA2) regulates esterification of plasma membrane cholesterol by modulation of sphingolipid metabolism
Authors: Davis, Warren
Journal: Biochimica et Biophysica Acta (BBA)-Molecular and Cell Biology of Lipids (2014): 168--179
 
A high-throughput sphingomyelinase assay using natural substrate
Authors: Xu, Miao and Liu, Ke and Southall, Noel and Marugan, Juan J and Remaley, Alan T and Zheng, Wei
Journal: Analytical and bioanalytical chemistry (2012): 407--414

 

参考文献

Phospholipase C and sphingomyelinase activities of the Clostridium perfringens alpha-toxin
Authors: Urbina P, Flores-Diaz M, Alape-Giron A, Alonso A, Goni FM.
Journal: Chem Phys Lipids (2009): 51
 
Sphingomyelinase-induced ceramide production stimulate calcium-independent JNK and PP2A activation following cerebral ischemia
Authors: Tian HP, Qiu TZ, Zhao J, Li LX, Guo J.
Journal: Brain Inj (2009): 1073
 
SMase II, a new sphingomyelinase D from Loxosceles laeta venom gland: molecular cloning, expression, function and structural analysis
Authors: de Santi Ferrara GI, Fern and es-Pedrosa Mde F, Junqueira-de-Azevedo Ide L, Goncalves-de-Andrade RM, Portaro FC, Manzoni-de-Almeida D, Murakami MT, Arni RK, van den Berg CW, Ho PL, Tambourgi DV.
Journal: Toxicon (2009): 743
 
Neutral sphingomyelinase-induced ceramide accumulation by oxidative stress during carbon tetrachloride intoxication
Authors: Ichi I, Kamikawa C, Nakagawa T, Kobayashi K, Kataoka R, Nagata E, Kitamura Y, Nakazaki C, Matsura T, Kojo S.
Journal: Toxicology (2009): 33
 
Purification, characterization, and gene cloning of sphingomyelinase C from Streptomyces griseocarneus NBRC13471
Authors: Sugimori D., undefined
Journal: J Biosci Bioeng (2009): 293
 
Transcriptional regulation of neutral sphingomyelinase 2 gene expression of a human breast cancer cell line, MCF-7, induced by the anti-cancer drug, daunorubicin
Authors: Ito H, Murakami M, Furuhata A, Gao S, Yoshida K, Sobue S, Hagiwara K, Takagi A, Kojima T, Suzuki M, Banno Y, Tanaka K, Tamiya-Koizumi K, Kyogashima M, Nozawa Y, Murate T.
Journal: Biochim Biophys Acta (2009): 681
 
ApoCIII-enriched LDL in type 2 diabetes displays altered lipid composition, increased susceptibility for sphingomyelinase, and increased binding to biglycan
Authors: Hiukka A, Stahlman M, Pettersson C, Levin M, Adiels M, Teneberg S, Leinonen ES, Hulten LM, Wiklund O, Oresic M, Olofsson SO, Taskinen MR, Ekroos K, Boren J.
Journal: Diabetes (2009): 2018
 
Structure and function of sphingomyelinase
Authors: Oda M., undefined
Journal: Yakugaku Zasshi (2009): 1233
 
Expression of alkaline sphingomyelinase in yeast cells and anti-inflammatory effects of the expressed enzyme in a rat colitis model
Authors: Andersson D, Kotarsky K, Wu J, Agace W, Duan RD.
Journal: Dig Dis Sci (2009): 1440
 
A complex extracellular sphingomyelinase of Pseudomonas aeruginosa inhibits angiogenesis by selective cytotoxicity to endothelial cells
Authors: Vasil ML, Stonehouse MJ, Vasil AI, Wadsworth SJ, Goldfine H, Bolcome RE, 3rd, Chan J.
Journal: PLoS Pathog (2009): e1000420