Self-contained nucleic acid processing
Instruments and methods for amplifying nucleic acids in a sample provided in a flexible, self-contained, substantially closed sample container.
1. An instrument for amplifying nucleic acids in a sample, comprising
an opening configured for receiving a flexible sample container between a first support member and a second support member, the flexible sample container comprising a fluid sample and a plurality of fluidly connected reaction zones including a lysis zone, a nucleic acid extraction zone positioned in the container downstream of the lysis zone, and a nucleic acid amplification zone positioned in the container downstream of the nucleic acid extraction zone, and one or more sealable ports fluidly connected to the reaction zones,
a bead milling component associated with the first or second support member, the bead milling component comprising a reciprocating drive member operatively coupled to at least two adjacent paddle elements that extend one at a time from a position adjacent the plane of an external surface of the first and/or second support member outwardly to a distal position adjacent the lysis zone to repeatedly and alternately contact the lysis zone to generate a lysate from the sample, and
a heater positioned on the first or second support member for controlling temperature of the nucleic acids in the amplification zone.
2. The bead beating instrument of claim 1 wherein the fluid sample comprises a quantity of zirconium lysis beads.
3. The instrument of claim 1 wherein the reciprocating drive member comprises a motor driven cam shaft with at least two off-center drive lobes mechanically coupled to the at least two paddles.
4. The instrument of claim 3 wherein the cam shaft comprises bearing members that translate rotary motion of the cam shaft into a linear motion of the paddles.
5. The instrument of claim 3 wherein the paddles are each operably connected to a cam follower that contacts a corresponding off-center drive lobe of the cam shaft.
6. The instrument of claim 1 the reciprocating drive member comprising a mechanical actuator associated with each paddle, wherein each mechanical actuator extends one at a time to repeatedly and alternately extend each paddle to contact the lysis zone.
7. The instrument of claim 1 wherein each paddle includes a biasing member positioned and configured to bias each paddle toward or away from the lysis zone.
8. The instrument of claim 1 wherein one or more of the paddles comprise a temperature control element.
9. The instrument of claim 8 wherein the temperature control element is one or more of a heater, cooler, Peltier device, resistance heater, induction heater, electromagnetic heater, thin film heater, printed element heater, or positive temperature coefficient heater.
10. The instrument of claim 1 wherein the at least two paddles are configured to extend together to plunge fluid from the lysis zone.
11. The instrument of claim 1 wherein the bead milling component comprises a plurality of at least three beater arms arranged asymmetrically around a central axis and driven by a motor.
12. An instrument for amplifying nucleic acids in a sample, comprising
an opening configured for receiving a flexible sample container between a first support member and a second support member, the flexible sample container comprising a fluid sample and a plurality of fluidly connected reaction zones including a lysis zone, a nucleic acid extraction zone positioned in the container downstream of the lysis zone, and a nucleic acid amplification zone positioned in the container downstream of the nucleic acid extraction zone, and one or more sealable ports fluidly connected to the reaction zones,
a bead milling component associated with the first or second support member, the bead milling component comprising a reciprocating drive member operatively coupled to at least two side-by-side paddle elements that extend outwardly one at a time from a position adjacent the first and/or second support member toward the lysis zone to repeatedly and alternately contact the lysis zone to generate a lysate from the sample, and
a heater positioned on the first or second support member for controlling temperature of the nucleic acids in the amplification zone.
13. The instrument of claim 12 wherein the reciprocating drive member comprises a motor driven cam shaft with at least two off-center drive lobes mechanically coupled to the at least two paddles.
14. The instrument of claim 12 wherein one or more of the paddles comprise a temperature control element selected from the group consisting of a heater, cooler, Peltier device, resistance heater, induction heater, electromagnetic heater, thin film heater, printed element heater, positive temperature coefficient heater, and combinations thereof.