Nucleic acid amplification method: ramification-extension...

Details Nucleic acid amplification method: ramification-extension... Nucleic acid amplification method: ramification-extension...

2005-02-15

2005-02-15

Lu, Frank W (Department: 1634)

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing compound containing saccharide radical

C435S006120, C435S091100, C435S091510, C536S023100, C536S023700, C536S023720, C536S024300, C536S024330, C536S025300

Reexamination Certificate

active

06855523

ABSTRACT:
An improved method allowing for rapid sensitive and standardized detection of a target nucleic acid from a pathogenic microorganism or virus or normal or abnormal gene in a sample is provided. The method involves hybridizing a target nucleic acid to several non-overlapping oligonucleotide probes that hybridize to adjacent regions in the target nucleic acid, the probes being referred to capture/amplification probes and amplification probes, respectively, in the presence of paramagnetic beads coated with a ligand binding moiety. Through the binding of a ligand attached to one end of the capture/amplification probe and the specific hybridization of portions of the probes to adjacent sequences in the target nucleic acid, a complex comprising the target nucleic acid, the probes and the paramagnetic beads is formed. The probes may then ligated together to form a contiguous ligated amplification sequence bound to the beads, which complex may be denatured to remove the target nucleic acid and unligated probes. Alternatively, separate capture and amplification probes may be used which form continuous full-length or circular probes, and may be directly detected or amplified using a suitable amplification technique, e.g., PCR, RAM or HSAM for detection. The detection of the ligated amplification sequence, either directly or following amplification of the ligated amplification sequence, indicates the presence of the target nucleic acid in a sample. Methods for the detection of the ligated amplification sequence, including hybridization signal amplification method and ramification-extension amplification method, are also provided.

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