The Qiagen Epitect Bisulfite kit converts DNA in one step which is followed by a clean up step. Following the bisulfite conversion, I ran a PCR using the. U can try EZ Direct Methylation kit from Zymo research. For formalin fixed tissues, u need to increase the digestion time as well as volume of Proteinase K. Both. during purification. QIAGEN’s EpiTect® Fast Bisulfite kits prevent DNA fragmentation during bisulfite conversion thanks to the unique DNA. Protect Buffer, which.

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The CFP sites do not comprise any cytosines and therefore are not altered during the bisulfite conversion.

EpiTect 96 Bisulfite Kit (2) from QIAGEN | SelectScience

Inappropriate Conversion of Methylated Cytosines to Thymines. The aim of this elitect is to evaluate the performance of the most widely used kits: DNA methylation of cytosines within the CpG dinucleotide context is an epigenetic mechanism, which plays an important role in biological processes, such as cell differentiation and development [1].

Therefore, the sense strand of this locus is not altered during bisulfite conversion and can be used to quantify bisulfite as well as genomic DNA without the introduction of a bias.

The bisulfite conversion was carried out using nine different kits. Two additional tests based on the methylation analysis in FFPE bisulflte already show a high level of validation qualifying them for clinical use.

After HSO 3 — induced hydrolytic deamination of the intermediate [32][33]bisulfite is eliminated at alkaline pH [32].

Correlation between conversion efficiency and inappropriate conversion was tested using Pearson correlation. Hence, unconverted and converted DNA is amplified with the same efficiency.


Chr2,— and bp; GRCh Furthermore, the introduction of an incubation step at high temperature after proteinase K treatment might help to remove remaining crosslinks based on the antigen retrieval principal and therefore lead to higher quality DNA [37].

Direct input of blood plasma and serum. Phys Chem Chem Phys. The appropriate lysis is essential with regard to performance in downstream molecular applications [33]. Published online Apr 3.

EpiTect Bisulfite Kit (48), from Qiagen – Labsave

However, Genereux et al. DNA conversion efficiencies determined in this study ranged from Curr Protoc Mol Biol Chapter 7: Methylation of the promoter of the MGMT gene in gliomas allows for the prediction of the response to alkylating agents [3]. Water was applied to nine different bisulfite conversion kits and processed like sample DNAs process negative control sample.

Increasing the duration of proteinase K treatment up to 48 hours and supplementing the reaction with additional proteinase K during the lysis will help to increase the yield of highly integer DNA [20][34][35][36].

Several kits for bisulfite conversion of DNA are commercially available each showing advantages and disadvantages. Shown are mean values of triplicate PCR measurements. Received Jan 17; Accepted Mar 8. Middle and right panel: However, only a few kits allow for the modification of DNA from challenging input sample material, i.

To investigate the DNA stability a storage experiment was performed. Inhibitory effect of eluate derived from different bisulfite conversion kits.

EpiTect Bisulfite Kit (48)

Furthermore, the occurrence biisulfite bisulfite conversion errors [27][28] is an important parameter and should be considered carefully. While hands-on-time and time to result are usually rather an issue for routine molecular diagnostics, overall high yield of DNA suitable for downstream molecular analyses is mandatory in the fields of research and diagnostics.


Bisulfite conversion of each sample type was done in three independent reactions. Nevertheless, the specific conversion of cytosines to uracils by means of bisulfite is still state of the art in DNA methylation analyses.

Rpitect Dietrich is co-inventor and owns patents on methylation biomarkers and related technologies.

Free-circulating methylated SEPT9 gene copies in plasma as bjsulfite screening biomarker for colorectal cancer were recently validated in a large observational prospective screening trial including more than 7, asymptomatic subjects [10]. The assay showed a PCR efficiency of 2.

Several studies describe the sensitive analysis of DNA methylation biomarkers in plasma or serum as promising tests for early detection of various tumors [10][11]. The conversion efficiency was tested by means of a PCR product generated nisulfite primers targeting cytosine-free priming CFP sites. Extracted DNA from fresh and fixed tissues. However, even though the performance differences between the kits regarding specific and inappropriate conversion are statistically significant, these differences seem not to be high enough to bisulfitr the downstream analysis of bisulfite DNA prepared with either kit.

Conventional bisulfite conversion protocols require hours of exposure to low-molarity, low-temperature bisulfite. Accordingly, these eluates could be used to quantify the inhibitory effect of impurities derived from the different kit protocols.

Yield of bisulfite-converted DNA obtained from fresh homogenized placental tissue 0. N Engl J Med.