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    • 5. 发明申请
    • IMPROVED HEAVYMETHYL ASSAY FOR THE METHYLATION ANALYSIS OF THE GSTPI GENE
    • 改进GSTPI基因甲基化分析的重组方法
    • WO2004113567A2
    • 2004-12-29
    • PCT/EP2004/006843
    • 2004-06-24
    • EPIGENOMICS AGTETZNER, ReimoDISTLER, Jürgen
    • TETZNER, ReimoDISTLER, Jürgen
    • C12Q1/68
    • C12Q1/6886C12Q1/6827C12Q2600/154C12Q2523/125
    • Described herein is a method for the detection of cyto-sine methylation in DNA samples, wherein the following steps are conducted: a genomic DNA sample, which comprises the DNA to be investigated as well as background DNA is treated with bisulfite (= disulfite, hydrogen sulfite) in such a way that all of the unmethylated cytosine bases are converted to uracil, while the 5-methylcytosine bases remain un-changed; the bisulfite treated DNA sample is amplified with the use of at least 2 primer oligonucleotides as well as a polymerase, wherein the DNA to be investigated is pre-ferred over the background DNA as the template, and a control fragment is amplified simultaneously to the am-plification of the bisulfite treated DNA within the same reaction mixture the amplified products are analyzed and the methylation status in the DNA to be investigated is concluded from the presence and /or the amount of the amplified products and/or from the analysis of additional positions.
    • 本文描述了用于检测DNA样品中细胞正辛基甲基化的方法,其中进行以下步骤:将包含待研究的DNA以及背景DNA的基因组DNA样品用亚硫酸氢盐(=二亚硫酸盐,氢气 亚硫酸盐),使得所有未甲基化胞嘧啶碱基转化成尿嘧啶,而5-甲基胞嘧啶碱基保持不变; 使用至少2个引物寡核苷酸和聚合酶扩增亚硫酸氢盐处理的DNA样品,其中待研究的DNA优先于背景DNA作为模板,并将对照片段同时扩增至上述 在相同的反应混合物中分析亚硫酸氢盐处理的DNA,分析扩增产物,并且从待测的DNA中的甲基化状态从扩增产物的存在和/或量得出和/或从额外位置的分析得出 。
    • 6. 发明申请
    • COMPOSITIONS AND METHODS FOR PREVENTING CARRY-OVER CONTAMINATION IN NUCLEIC ACID AMPLIFICATION REACTIONS
    • 用于防止核酸扩增反应中携带污染的组合物和方法
    • WO2006009870A2
    • 2006-01-26
    • PCT/US2005/021525
    • 2005-06-17
    • EPIGENOMICS AGTETZNER, ReimoBERLIN, KurtDISTLER, Jürgen
    • TETZNER, ReimoBERLIN, KurtDISTLER, Jürgen
    • C12Q1/68
    • C12Q1/6848C12Q2527/101C12Q2521/301
    • Particular aspects provide methods for the specific amplification of template DNA in the presence of potentially contaminating PCR products from previous amplification experiments, but wherein the contaminating prior reaction amplificates (carry-over contaminants) are rendered non-amplifiable, based on use of particular contaminant degradation enzmes, and use of at least one primer that is fully complementary to any contaminating prior reaction amplificate nucleic acid, but contains a mismatch with the correspond sequence of the sample template nucleic acid. Additional aspects provide a method for the specific amplification of single-stranded sample template DNA in the presence of potentially double-stranded carry-over products. Further aspects provide methods comprising use of a template-dependent thermostable DNA polymerase enzyme suitable for incorporating ribonucleotides as well as deoxy-nucleotides to provide a chimeric amplificate. After digestion with an RNase, any contaminating prior chimeric amplificate, the RNase is inactivated. These aspects are surprisingly effective alternatives to the carry over protection system known as UNG system, and other art-recognized methods.
    • 特定方面提供了在来自先前扩增实验的潜在污染性PCR产物存在下对模板DNA进行特异性扩增的方法,但其中基于使用特定的污染物降解使污染的先前的反应扩增(携带污染物)变得不可扩增 并且使用与任何污染的先前反应扩增核酸完全互补的至少一个引物,但包含与样品模板核酸的相应序列不匹配的引物。 另外的方面提供了在存在潜在双链携带产物的情况下单链样品模板DNA的特异性扩增的方法。 另外的方面提供了包括使用适合于掺入核糖核苷酸的模板依赖性热稳定性DNA聚合酶以及脱氧核苷酸以提供嵌合扩增的方法。 用RNase消化后,任何污染的先前的嵌合扩增,核糖核酸酶被灭活。 这些方面对于被称为UNG系统的承载保护系统以及其他本领域公认的方法是惊人的有效的替代方案。