The invention provides compositions and methods for the detection of targets in a sample; in particular, an in situ hybridization (ISH) sample. Probes and detectable labels may be provided in multiple layers in order to increase the flexibility of a detection system, and to allow for amplification to enhance the signal from a target. The layers may be created by incorporating probes and detectable labels into larger molecular units that interact through nucleic acids base-pairing, including peptide-nucleic acid (PNA) base-pairing. Optional non-natural bases allow for degenerate base pairing schemes. The compositions and methods are also compatible with immunohistochemistry (IHC), immunocytochemistry (ICC), flow cytometry, enzyme immuno-assays (EIA), enzyme linked immuno-assays (ELISA), blotting methods (e.g. Western, Southern, and Northern), labeling inside electrophoresis systems or on surfaces or arrays, and precipitation, among other general detection assay formats. The invention is also compatible with many different types of targets, probes, and detectable labels.
本发明提供了一种用于检测样品中的目标物的组合物和方法;特别是用于原位杂交(ISH)样品的检测。探针和可检测标记可以在多个层面上提供,以增加检测系统的灵活性,并允许扩增以增强目标物的信号。这些层可以通过将探针和可检测标记合并到较大的分子单元中而创建,这些分子单元通过核酸碱基配对相互作用,包括肽核酸(
PNA)碱基配对。可选的非天然碱基允许退化碱基配对方案。这些组合物和方法也与免疫组织
化学(IHC)、免疫细胞
化学(ICC)、流式细胞术、酶免疫分析(EIA)、酶联免疫分析(ELI
SA)、印迹方法(例如Western、Southern和Northern)、在电泳系统内或在表面或阵列上标记以及沉淀等其他常见的检测测定格式兼容。本发明也与许多不同类型的目标物、探针和可检测标记兼容。