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    • 2. 发明授权
    • Hybridization assay signal enhancement
    • 杂交测定信号增强
    • US6103474A
    • 2000-08-15
    • US183619
    • 1998-10-30
    • Douglas J. DellingerSueAnn C. DahmDiane D. IlsleyRobert A. AchMark A. Troll
    • Douglas J. DellingerSueAnn C. DahmDiane D. IlsleyRobert A. AchMark A. Troll
    • C12Q1/68C07H21/02C07H21/04C12N15/00
    • C12Q1/682
    • A signal amplification method for detecting a target nucleic acid analyte having a homopolymeric region and a target sequence includes steps of: contacting an analyte under hybridizing conditions with a multiplicity of reporter probes, each reporter probe including a signal region and an oligonucleotide sequence which is complementary to and capable of forming a stable hybrid with the analyte homopolymeric region to form an analyte:reporter probe hybrid; and forming an analyte:capture probe hybrid by contacting the analyte target sequence with a capture probe under hybridizing conditions. The analyte:reporter probe hybrid may formed prior to contacting the analyte target sequence with the capture probe, so the result of contacting the analyte target sequence with the capture probe results in formation of an analyte:reporter probe:capture probe complex. The analyte:capture probe hybrid may be immobilized on a solid generally planar surface in an array format. Multiple reporter probes may form triple helix structures for further signal enhancement. Multiply-labeled hairpin reporter probes may be employed according to the invention. Also, a kit for carrying out the invention includes one or more capture probes immobilized on a surface, reporter probes each having a signal region and a sequence for binding analyte homopolymer regions, and, optionally, reagents for addition of homopolymer regions to nucleic acid analytes and for carrying out the hybridization reaction.
    • 用于检测具有均聚区和靶序列的靶核酸分析物的信号扩增方法包括以下步骤:在杂交条件下与多个报道探针接触分析物,每个报道探针包括信号区和互补的寡核苷酸序列 并且能够与分析物均聚区形成稳定的杂交体以形成分析物:报道探针杂交体; 并通过在杂交条件下将分析物靶序列与捕获探针接触来形成分析物:捕获探针杂交体。 在将分析物靶序列与捕获探针接触之前可以形成分析物:报告物探针杂交体,因此将分析物靶序列与捕获探针接触的结果导致分析物的形成:报道探针:捕获探针复合物。 分析物:捕获探针杂交体可以以阵列形式固定在固体大体上平坦的表面上。 多个报道探针可以形成用于进一步信号增强的三重螺旋结构。 根据本发明,可以使用多重标记的发夹报道探针。 此外,用于实施本发明的试剂盒包括固定在表面上的一种或多种捕获探针,各自具有信号区域的报道探针和用于结合分析物均聚物区域的序列,以及任选的用于向核酸分析物加入均聚物区域的试剂 并用于进行杂交反应。