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【产品名称】
 MethylFlash尿液5甲基胞嘧啶定量试剂盒(Colorimetric)
【订购货号】
 E14292
【产品CAS号码】
 无
【规格/价格】
 
【预计到货时间】
 30 天
【产品详细说明】
【本产品仅供科学研究使用】
【更新日期】 2012-2-29  
Product Overview


The MethylFlash™ Urine 5-Methylcytosine (5-mC) Quantification Kit (Colorimetric) is a complete set of optimized buffers and reagents to colorimetrically quantify 5-mC in urine using an inhibitory competitive immunoassay method. It is suitable for detecting total urinary 5-methylcytosine levels, resulting from whole body turnover or degradation of methylated DNA/RNA in urine from humans and animals. The urine samples can be in fresh or frozen form. The kit has the following advantages and features:

  • Innovative colorimetric assay with easy-to-follow steps for convenience and speed. The entire procedure can be finished within 4 hours.
  • 96 strip-well microplate format makes the assay flexible: manual or high throughput analysis.
  • Innovative kit composition enables background signals to be extremely low, which eliminates the need for plate blocking and allows the assay to be simple, accurate, reliable, and consistent.
  • The level of 5-mC measured in human urine samples using this kit is comparable to that detected by HPLC method.
  • A novel assay principle allows high sensitivity to be achieved. The detection limit can be as low as 0.03 ng/assay well or 1 nM of 5-mC.
  • Low input range of urine for each assay with a volume of 0.5 to 5 µl and an optimal volume of 1 µl.
  • Optimized antibody and enhancer solutions allow for high specificity to 5-mC, without cross-reactivity to unmethylated cytosine.
  • Negative control and positive standard are included, which are suitable for quantification of 5-mC in free form and 5-mC contained in methylated DNA/RNA fragments from different urine samples.

Background Information
Nucleobase 5-methylcytosine (5-mC), a modified form of cytosine converted by cytosine methyltransferases, is widespread both in DNA and different cellular RNAs. The biological importance of DNA 5-mC methylation as a major epigenetic modification in phenotype and gene expression has been widely recognized. Recent data strongly suggests that RNA 5-mC methylation is also involved in the regulation of various biological processes including tRNA stability/recognition and mRNA translation.

Urinary excretion of 5-mC including both 5-methyl-2-deoxycytidine and 5-methylcytidine is an indication of a whole body turnover or degradation of methylated DNA and RNA. The urinary 5-mC level can be altered by a change of the bodies’ turnover of methylated DNA/RNA or alteration of cellular DNA/RNA methylation status. A number of studies have indicated that 5-mC excreted in urine has the potential to act as a cancer biomarker, with an increased level arising from disease onset and progression. For example, an elevated level of urinary 5-mC was observed in lung cancer, breast cancer, and leukemia patients with active disease states. It was also shown that urinary 5-mC excretion is effected by Alzheimer’s disease or by radiation treatment. It is suggested that urinary 5-mC might be applicable as a biological marker for detecting some types of cancer and monitoring cancer progression after treatment with radiation or demethylation reagents.

Chromatography-based techniques such as HPLC and TLC mass spectrometry are commonly used for detecting 5-mC in urine and although fairly acurate, are time consuming, less sensitive, and have low throughput with high costs. To address this problem, Epigentek offers the MethylFlash Urine 5-Methylcytosine (5-mC) Quantification Kit (Colorimetric) to quantify 5-mC or body turnover status of methylated DNA/RNA using urine samples.

Principle & Procedure
In this ELISA-like inhibitory competitive immunoassay assay, urine samples and the 5-mC standard are first incubated with a 5-mC antibody solution and then transferred to strip wells coated with methylated DNA (5-mC). The well is washed to remove any unbound reagents after incubation and then a detection antibody is added to generate a signal that can be measured colorimetrically by reading the absorbance in a microplate spectrophotometer. Because 5-mC in the urine sample inhibits the binding of 5-mC antibody to 5-mC coated on the well, higher concentrations of 5-mC in the urine sample lead to a reduced binding of the antibody to the 5-mC on the well. Therefore the signal or OD intensity measured from the well will be inversely proportional to the amount of 5-mC in the urine sample and the amount of 5-mC in the urine sample can be quantified by a comparison with a predetermined 5-mC standard.

     


Fig. 1. Schematic procedure for the MethylFlash™ Urine 5-Methylcytosine Quantification Kit (Colorimetric).


Fig. 2. 5-mC standard was added into the assay wells at different concentrations and then measured with the MethylFlash™ Urine 5-Methylcytosine Quantification Kit (Colorimetric).


Fig. 3. 5-mC level is quantified from different volumes of human urine using the MethylFlash™ Urine 5-Methylcytosine Quantification Kit (Colorimetric).

 

Product Components


WB (10X Wash Buffer)
BS (Binding Solution)
MS (5-mC Standard, 4 µg/ml)*
ME3 (Negative Control, 50 µg/ml)*
ME4 (5-mC DNA solution, 320X)*
ME5 (Capture Antibody, 1000X)*
ME6 (Detection Antibody, 2000X)*
ES (Enhancer Solution)*
DS (Developer Solution)
SS (Stop Solution)
Plate 1 (Assay Plate) (With Frame)
Plate 2 (Sample Preparation Plate)
User Guide

* Spin the solution down to the bottom prior to use.

User Guide & MSDS


[User Guide]*
*Always use the actual User Guide that shipped with your product. Is the above file locked? You can also request user guides by emailing info@epigentek.com along with your contact information and institution name.

 

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