METHOD FOR PROCESSING POLYNUCLEOTIDE-CONTAINING SAMPLES
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Abstract
Methods and systems for processing polynucleotides (e.g., DNA) are disclosed. A processing region includes one or more surfaces (e.g., particle surfaces) modified with ligands that retain polynucleotides under a first set of conditions (e.g., temperature and pH) and release the polynucleotides under a second set of conditions (e.g., higher temperature and/or more basic pH). The processing region can be used to, for example, concentrate polynucleotides of a sample and/or separate inhibitors of amplification reactions from the polynucleotides. Microfluidic devices with a processing region are disclosed.
45 Citations
43 Claims
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1-23. -23. (canceled)
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24. A method for processing polynucleotide-containing sample, the method comprising:
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retaining polynucleotides from a sample on a plurality of binding particles in a process chamber under a first set of conditions, wherein the sample has a volume from 0.5 microliters to 3 milliliters; wherein the first set of conditions includes a first pH of about 8.5 or less and a first temperature; releasing the polynucleotide from the plurality of binding particles under a second set of conditions; and wherein the second set of conditions includes increasing the pH to second pH and increasing the temperature to a second temperature, wherein the second temperature is less than 100°
C. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for processing polynucleotide-containing samples, the method comprising:
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retaining one or more polynucleotides from a sample on a plurality of binding particles under a first set of conditions, wherein the sample has a volume from 0.5 microliters to 3 milliliters; wherein the first set of conditions includes a first pH of 8.5 or less and a first temperature of less than about 55°
C.;releasing the polynucleotide from the plurality of binding particles under a second set of conditions; and wherein the second set of conditions includes increasing the pH by at least three units and increasing the temperature by at least about 40°
C. - View Dependent Claims (34, 35)
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36. A method for processing a polynucleotide-containing sample, the method comprising:
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contacting the sample with a plurality of binding particles having polycationic polyamides bound to the surface, the binding particles retaining one or more polynucleotides thereon at a first pH and a first temperature, wherein the sample has a volume from 0.5 microliters to 3 milliliters; and contacting the binding particles with a basic solution at a second pH and a second temperature, thereby releasing the polynucleotides from the plurality of binding particle, wherein the basic solution comprises a hydroxide solution having a molarity from about 2 mM to about 500 mM. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43)
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Specification