Method for isolation of genomic dna, rna and proteins from a...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/10 (2006.01) C07K 1/14 (2006.01)

Patent

CA 2705267

The invention provides systems, methods and kits for the separation and/or purification of at least two cellular components selected from genomic DNA, RNA and proteins. The method includes first lysing a biological sample to generate an aqueous solution containing the cellular components; then applying the aqueous solution to a first mineral support under conditions for genomic DNA to bind; and collecting the flowthrough which contains unbound total RNA and proteins. The method further includes applying the flowthrough to a second mineral support under conditions for RNA to bind, and collecting the flowthrough which contains proteins. The genomic DNA and total RNA bound can be eluted while the protein in the flowthrough can be further purified. Further the total RNA isolated could be used to isolate small RNA such as microRNA.

L'invention concerne des systèmes, des procédés et des kits pour la séparation et/ou la purification d'au moins deux composants cellulaires sélectionnés parmi de l'ADN génomique, de l'ARN et des protéines. Le procédé comprend premièrement la lyse d'un échantillon biologique pour générer une solution aqueuse contenant les composants cellulaires; puis l'application de la solution aqueuse à sur un premier support minéral dans des conditions pour que l'ADN génomique se lie; et le recueil du flux traversant qui contient l'ARN total non lié et les protéines. Le procédé comprend en outre l'application du flux traversant à un second support minéral dans des conditions pour que l'ARN se lie, et le recueil du flux traversant qui contient des protéines. L'ADN génomique et l'ARN total lié peuvent être élués tandis que la protéine dans le flux continu peut être purifiée davantage. De plus, l'ARN total isolé pourrait être utilisé pour isoler un petit ARN, tel que du micro-ARN.

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