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    • 36. 发明申请
    • FLOW-CYTOMETRIC HETERODUPLEX ANALYSIS FOR DETECTION OF GENETIC ALTERATIONS
    • 用于检测遗传变异的流式细胞异位异构体分析
    • WO2006113590A2
    • 2006-10-26
    • PCT/US2006014346
    • 2006-04-17
    • CEDARS SINAI MEDICAL CENTERSZABO GABORLUSTYIK GYOERGY
    • SZABO GABORLUSTYIK GYOERGY
    • C12Q1/68
    • C12Q1/686C12Q2565/626C12Q2545/114C12Q2523/107
    • The present invention provides methods and kits useful for the detection of genetic alterations and to diagnose a disease condition caused by a genetic alteration. The invention involves two different PCR products, one control "unaltered" product and one sample product, which may contain "altered" DNA, that are mixed, denatured, and allowed to re-anneal. The DNA duplexes are then treated enzymatically or chemically to cleave single stranded or mismatched DNA regions resulting from the genetic alterations. The alterations are then quantitated by measuring a decrease in a fluorescent signal resulting from removal of the fluorescent tag. Further embodiments of the invention include a second, different fluorescent tag that is used to measure non-specific degradation of the duplexes. Other embodiments of the invention include the use of avidin coated microbeads to which the duplexes may be attached for quantitation by flow cytometry. Still further embodiments include biological microbeads for this purpose.
    • 本发明提供了可用于检测遗传改变并诊断由遗传改变引起的疾病状况的方法和试剂盒。 本发明涉及两种不同的PCR产物,一种对照“未改变”的产物和一种样品,其可以含有“改变的”DNA,其被混合,变性并允许再退火。 然后将DNA双链体酶或化学处理以切割由遗传改变引起的单链或错配的DNA区域。 然后通过测量由去除荧光标签产生的荧光信号的减少来定量改变。 本发明的其它实施方案包括用于测量双链体的非特异性降解的第二种不同的荧光标签。 本发明的其它实施方案包括使用亲和素包被的微珠,通过流式细胞术可将双链体连接到其上进行定量。 另外的实施方案包括用于此目的的生物微珠。