10-Acetyl-3,7-dihydroxyphenoxazine (ADHP) 过氧化氢探针可通过荧光光度计和酶标仪分析结果

10-Acetyl-3,7-dihydroxyphenoxazine (ADHP);Amplex®Red; Resorufin 试卤灵;过氧化氢探针;Ampliflu™ Red;CAS NO:119171-73-2;

基本介绍:

10-Acetyl-3,7-dihydroxyphenoxazine (ADHP),中文名10-乙酰基-3,7-二羟基吩嗪,以商标名Amplex®Red在市场上销售。ADHP是一种高度灵敏和稳定的过氧化物酶底物,选择性检测过氧化氢(H2O2)。存在辣根过氧化物酶(HRP)的体系中,这一基本无色和非荧光的ADHP与H2O2以1:1的化学定量比反应,生成强红色荧光的试卤灵(Resorufin)(Ex/Em= 571/585nm),可通过荧光光度计和酶标仪分析结果。许多酶反应能产生H2O2,因此,ADHP能够用在偶联酶促反应中检测许多不同酶的生物活性。

工作原理:

Fig 1. 使用ADHP进行偶联酶促反应的工作原理。葡萄糖氧化酶催化葡萄糖氧化生成过氧化氢(H2O2),通过辣根过氧化物酶(HRP)催化ADHP反应生成强荧光试卤灵(Resorufin)。

产品应用:

10-Acetyl-3,7-dihydroxyphenoxazine (ADHP)是目前位置最灵敏和稳定的荧光探针用来检测HRP和H2O2。

A)  ADHP普遍用来检测许多免疫实验中的HRP;

B)  ADHP用来检测微量的H2O2;

Zhou, M.等研究表明ADHP(Amplex®Red)检测过氧化物酶活性,最少能检测1×10−5U/mL HRP;或H2O2,最少能检测50nM H2O2。【文献来源:Zhou M et al. A stable nonfluorescent derivative of resorufin for the fluorometric determination of trace hydrogen peroxide: applications in detecting the activity of phagocyte NADPH oxidase and other oxidases. Anal Biochem. 1997 Nov 15;253(2):162-8.】

基本特性:

1)   CAS NO.:119171-73-2

2)   化学名:1-(3,7-dihydroxy-10H-phenoxazin-10-yl)-ethanone; 10H-Phenoxazine-3,7-diol, 10-acetyl-;

3)   同义名:N-Acetyl-3,7-dihydroxyphenoxazine N-乙酰基-3,7-二羟基吩嗪;ADHP;Amplex®Red Reagent;A 6550;Ampliflu™ Red 荧光红染料;

4)   分子式:C14H11NO4

5)   分子量:257.25

6)   纯度:≥98%

7)   摩尔消光系数(ε):54,000 (Resorufin)

8)   Ex/Em:571/585nm (pH 9.0, Resorufin)

9)   溶解性:溶于DMSO、DMF

ADHP的应用实例:

文献来源:Summers FA et al. Photooxidation of Amplex Red to resorufin: implications of exposing the Amplex Red assay to light. Methods Enzymol. 2013;526:1-17.

实验1)Amplex Red Assay

Reactions containing 50 µM Amplex Red reagent, 0.1 U/mL HRP, H2O2 and 0.5 U/mL catalase in 50 mM sodium phosphate buffer, pH 7.4, as indicated in the figure legends, were prepared in a darkroom under a red light. White ELISA plates containing the samples (100 µL/well) in triplicate were either kept in the dark for 30 and 60 min or under ambient laboratory light. The fluorescence (excitation 535 nm, emission 595 nm) was measured on a GENios platereader (Tecan, Durham, NC, USA).

实验2)Cell Culture Assay

HaCaT keratinocytes were incubated with 50 µM Amplex Red in PBS for 1 h at 37°C in the dark, then cells were irradiated using UVA (315–400 nm) from four fluorescent PUVA lamps (Houvalite F20T12BL-HO; National Biological Co., Twinsburg, OH) for 15 minutes (3.75 J/cm2) and 30 minutes (7.5 J/cm2). Control cells were treated with the same conditions. After exposure, the fluorescence (excitation 535 nm, emission 595 nm) was recorded using a plate reader.

产品订购:

货号 产品名称 规格          
MX5203-1MG      10-Acetyl-3,7-dihydroxyphenoxazine (ADHP) 过氧化氢探针 1mg
MX5203-5MG 10-Acetyl-3,7-dihydroxyphenoxazine (ADHP) 过氧化氢探针    5mg
MX5203-25MG 10-Acetyl-3,7-dihydroxyphenoxazine (ADHP) 过氧化氢探针 25mg

注意事项

1)   ADHP的使用比较方便,可配制10-20mM DMSO储存液,之后用反应缓冲液比如PBS,Tris buffer稀释到50-200µM工作浓度用于检测。最佳的工作浓度需根据自身实验需求进行优化。

2)   Amplex®Red是Life Technologies公司的注册商标名。

3)   为了您的安全和健康,请穿实验服并戴一次性手套操作。