Devices and methods for isolating RNA
First Claim
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1. A method of preparing an RNA sample substantially free of genomic DNA, comprising the following steps:
- (a) forming a tissue/cell lysate from a biological sample;
(b) removing essentially all of the gDNA;
(c) forming a precipitate by adding an organic solvent to the preparation of (b);
(d) contacting an RNA isolation membrane column with said precipitate of (c), wherein said column comprises a membrane; and
(e) collecting said precipitate from said membrane, wherein said precipitate is substantially free of said genomic DNA.
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Abstract
Devices and methods for isolating nucleic acid is disclosed herein. In particular, the isolation of total cellular RNA is discussed. Additionally, devices and methods for reducing genomic DNA in a biological sample without introducing harmful contaminants, and without significantly increasing the time required for the overall procedure being performed on a sample are presented.
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Citations
27 Claims
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1. A method of preparing an RNA sample substantially free of genomic DNA, comprising the following steps:
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(a) forming a tissue/cell lysate from a biological sample;
(b) removing essentially all of the gDNA;
(c) forming a precipitate by adding an organic solvent to the preparation of (b);
(d) contacting an RNA isolation membrane column with said precipitate of (c), wherein said column comprises a membrane; and
(e) collecting said precipitate from said membrane, wherein said precipitate is substantially free of said genomic DNA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of preparing an RNA sample substantially free of genomic DNA, comprising the following steps:
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(a) forming a tissue/cell lysate from a biological sample;
(b) contacting a pre-filtration column with said lysate, wherein said pre-filtration column comprises a fiber material, wherein said fiber material has at least one layer of glass or borosilicate fiber;
(c) forming a precipitate by adding an organic solvent to step (b);
(d) contacting an RNA isolation membrane column with said preparation from step (c), wherein said RNA isolation membrane column comprises a membrane; and
(e) collecting said precipitate from said RNA isolation membrane column, wherein said precipitate is substantially free of said genomic DNA. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A kit for isolating RNA in a form essentially free from gDNA, comprising the following:
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(a) at least one pre-filtration column, wherein said pre-filtration column comprises a fiber material, wherein said fiber material has at least one layer of glass or borosilicate fiber;
(b) at least one RNA isolation membrane column, wherein said membrane column comprises a membrane;
(c) reagents for both (a) and (b); and
(d) instructions for implementing (a) through (c). - View Dependent Claims (26, 27)
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Specification