Method and materials for isolation of nucleic acid materials
First Claim
1. A method for nucleic acid isolation comprising:
- receiving a binding moiety solution within a process chamber, wherein the binding moiety solution comprises a collection buffer and a set of affinity moiety-coated microparticles, wherein the set of affinity moiety-coated microparticles comprises Polypropylenimine tetramine dendrimer Generation 1 amide-bonded to a set of microparticles;
contacting the binding moiety solution with a biological sample, within the process chamber, thereby producing a moiety-sample mixture;
incubating the moiety-sample mixture to reversibly bind nucleic acid material of the biological sample to the set of affinity moiety-coated microparticles, thereby producing a set of moiety-bound nucleic acid particles;
receiving a cartridge at a cartridge receiving module comprising a set of pins, each pin in the set of pins displaceable between a first position and a second position;
occluding a fluidic pathway of the cartridge upon displacement of a first subset of the set of pins;
separating the set of moiety-bound nucleic acid particles from the moiety-sample mixture, within the fluidic pathway of the cartridge;
washing the set of moiety-bound nucleic acid particles within the fluidic pathway of the cartridge, in coordination with displacement of a second subset of the set of pins, wherein displacement of the second subset of pins includes reversal of displacement of at least one pin in the first subset of the set of pins, in reversing occlusion of a portion of the fluidic pathway; and
releasing a nucleic acid sample from the set of moiety-bound nucleic acid particles with an elution solution characterized by a pH greater than 10.
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Abstract
A method for nucleic acid isolation comprising: receiving a binding moiety solution within a process chamber; mixing the binding moiety solution with a biological sample, within the process chamber, in order to produce a moiety-sample mixture; incubating the moiety-sample mixture during a time window, thereby producing a solution comprising a set of moiety-bound nucleic acid particles and a waste volume; separating the set of moiety-bound nucleic acid particles from the waste volume; washing the set of moiety-bound nucleic acid particles; and releasing a nucleic acid sample from the set of moiety-bound nucleic acid particles. The method preferably utilizes a binding moiety comprising at least one of poly(allylamine) and polypropylenimine tetramine dendrimer, both of which reversibly bind and unbind to nucleic acids based upon environmental pH.
153 Citations
20 Claims
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1. A method for nucleic acid isolation comprising:
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receiving a binding moiety solution within a process chamber, wherein the binding moiety solution comprises a collection buffer and a set of affinity moiety-coated microparticles, wherein the set of affinity moiety-coated microparticles comprises Polypropylenimine tetramine dendrimer Generation 1 amide-bonded to a set of microparticles; contacting the binding moiety solution with a biological sample, within the process chamber, thereby producing a moiety-sample mixture; incubating the moiety-sample mixture to reversibly bind nucleic acid material of the biological sample to the set of affinity moiety-coated microparticles, thereby producing a set of moiety-bound nucleic acid particles; receiving a cartridge at a cartridge receiving module comprising a set of pins, each pin in the set of pins displaceable between a first position and a second position; occluding a fluidic pathway of the cartridge upon displacement of a first subset of the set of pins; separating the set of moiety-bound nucleic acid particles from the moiety-sample mixture, within the fluidic pathway of the cartridge; washing the set of moiety-bound nucleic acid particles within the fluidic pathway of the cartridge, in coordination with displacement of a second subset of the set of pins, wherein displacement of the second subset of pins includes reversal of displacement of at least one pin in the first subset of the set of pins, in reversing occlusion of a portion of the fluidic pathway; and releasing a nucleic acid sample from the set of moiety-bound nucleic acid particles with an elution solution characterized by a pH greater than 10. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for total nucleic acid extraction, comprising simultaneous isolation and concentration of DNA and RNA from a biological sample, the method comprising:
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receiving a binding moiety solution within a process chamber, wherein the binding moiety solution comprises a collection buffer and a set of affinity moiety-coated microparticles, wherein the set of affinity moiety-coated microparticles comprises Polypropylenimine tetramine dendrimer Generation 1 amide-bonded to a set of magnetic microparticles; mixing the binding moiety solution with between 10uL and 2mL of a biological sample, within the process chamber, thereby producing a moiety-sample mixture; incubating the moiety-sample mixture to reversibly bind nucleic acid material, comprising target DNA and RNA, of the biological sample to the set of affinity moiety-coated microparticles, thereby producing a set of moiety-bound nucleic acid particles; receiving a cartridge at a cartridge receiving module comprising a set of pins, each pin in the set of pins displaceable between a first position and a second position; occluding a fluidic pathway of the cartridge upon displacement of a first subset of the set of pins; magnetically separating the set of moiety-bound nucleic acid particles from the moiety-sample mixture, within the fluidic pathway of the cartridge; and eluting a nucleic acid sample comprising target DNA and RNA from the set of moiety-bound nucleic acid particles, into less than 20uL of an elution solution characterized by a pH greater than 10, in coordination with displacement of a second subset of the set of pins to modulate flow in the fluidic pathway, thereby facilitating total nucleic acid extraction. - View Dependent Claims (18)
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19. A method for nucleic acid isolation from a biological sample, comprising:
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receiving a binding moiety solution within a process chamber, wherein the binding moiety solution includes a set of affinity moiety-coated microparticles, comprising a set of microparticles amide-bonded to at least one of Poly(allylamine) of molecular weight <
30,000 Da and Polypropylenimine tetramine dendrimer Generation 1;producing a moiety-sample mixture upon combination of the binding moiety solution with the biological sample; producing a set of moiety-bound nucleic acid particles upon incubation of the moiety-sample mixture to reversibly bind nucleic acid material of the biological sample to the set of affinity moiety-coated microparticles; receiving a cartridge at a cartridge receiving module comprising a set of pins, each pin in the set of pins displaceable between a first position and a second position; occluding a fluidic pathway of the cartridge upon displacement of a first subset of the set of pins; separating the set of moiety-bound nucleic acid particles from the moiety-sample mixture, within the fluidic pathway of the cartridge; washing the set of moiety-bound nucleic acid particles within the fluidic pathway of the cartridge; and releasing a nucleic acid sample from the set of moiety-bound nucleic acid particles with an elution solution, in coordination with displacement of a second subset of the set of pins, wherein displacement of the second subset of the set of pins includes reversing displacement of at least one pin of the first subset of the set of pins, and reversing occlusion of a portion of the fluidic pathway. - View Dependent Claims (20)
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Specification