Method for isolating nucleic acids

C - Chemistry – Metallurgy – 07 – H

Patent

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C07H 1/08 (2006.01) C12N 15/10 (2006.01)

Patent

CA 2725631

The invention relates to a method and kits for isolating and/or purifying nucleic acids, in particular, short-chain nucleic acids, from a nucleic acid containing starting material, characterised by the following method steps: (a) bonding the nucleic acids to a nucleic acid bonding support material, wherein the starting material is brought into contact with the nucleic acid bonding support material in the presence of at least one chaotropic compound and preferably isopropanol, wherein the isopropanol is present in a concentration of >= 15 % (v/v) and <= 35% (v/v), (b) optional elution of the bonded nucleic acids from the nucleic acid bonding support material. Said method is particularly suitable for the purification of foetal DNA from maternal blood.

L'invention concerne un procédé et des kits destinés à l'isolement et/ou à l'épuration d'acides nucléiques, en particulier d'acides nucléiques à chaîne courte, à partir d'un matériau de départ contenant des acides nucléiques, procédé caractérisé en ce qu'il comprend les étapes suivantes : (a) liaison des acides nucléiques à un matériau support liant les acides nucléiques, étape dans laquelle on met en contact le matériau de départ en présence d'au moins un composé chaotrope et, de préférence l'isopropanol, avec le matériau support liant les acides nucléiques, l'alcool étant à une concentration = 15% (v/v) et = 35% (v/v); (b) élution optionnelle des acides nucléiques liés par le matériau support liant les acides nucléiques. Le procédé selon l'invention est approprié en particulier pour l'épuration de l'ADN foetal à partir du sang maternel.

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