Electrochemical detection of nucleic acid hybridization

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/68 (2006.01) G01N 1/18 (2006.01) G01N 27/30 (2006.01)

Patent

CA 2225935

A method of detecting a nucleic acid (e.g., DNA, RNA) that contains at least one preselected base (e.g., adenine, guanine, 6-mercaptoguanine, 8-oxo- guanine, and 8-oxo-adenine) comprises: (a) reacting the nucleic acid with a transition metal complex capable of oxidizing the preselected base in an oxidation-reduction reaction; (b) detecting the oxidation-reduction reaction; and (c) determining the presence or absence of the nucleic acid from the detected oxidation-reduction reaction at the preselected base. The method may be used in a variety of applications, including DNA sequencing, diagnostic assays, and quantitative analysis.

L'invention porte sur un procédé de détection d'un acide nucléique (par exemple de l'ADN ou de l'ARN) contenant au moins une base présélectionnée (par exemple de l'adénine, de la guanine, de la 6-mercaptoguanine, de la 8-oxo-guanine et de la 8-oxo-adénine) consistant: (a) à faire réagir l'acide nucléique avec un complexe de métaux de transition capable d'oxyder la base présélectionnée lors d'une réaction d'oxydation/réduction; (b) à détecter la réaction d'oxydation/réduction; et (c) à constater la présence ou l'absence de l'acide nucléique provenant de la réaction d'oxydation/réduction avec la base présélectionnée. Le procédé peut servir dans diverses applications y compris le séquençage de l'ADN, les tests diagnostiques, et les analyses quantitatives.

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