Devices and methods for rapid sample processing and analysis
Provided herein are devices and methods for the rapid processing and analysis of samples. In particular, a small-volume sample (e.g., nucleic acid sample) is exposed to (e.g., contacted with) different temperature zones within a device to process (e.g., amplify) and/or analyze (e.g., quantitate) the sample in an assay.
1. A device, comprising:
(a) a sample cassette comprising a front layer, a central layer, and a rear layer, wherein each layer is less than 1 mm in thickness, wherein the central layer comprises a sample containment cutout, wherein the front and rear layers are adhered to the central layer, wherein the front and/or rear layer comprise a transparent window aligned with the containment cutout;
(b) a sample container, which is structurally defined by the front layer, the rear layer, and the sample containment cutout of the sample cassette;
(c) a first set of heaters comprising a first front heater and a first rear heater and in opposing orientations thereby creating a gap comprising a first temperature zone between the first front and first rear heaters;
(d) a second set of heaters comprising a second front heater and a second rear heater in opposing orientations thereby creating a gap comprising a second temperature zone between the second front and second rear heaters;
(e) a shuttle motor and a sample holder, configured to physically align the sample container (i) within the first temperature zone, or (ii) within the second temperature zone, wherein the sample cassette is connected to the sample holder, and the sample holder is connected to the shuttle motor;
(f) a heater motor that is configured (i) to narrow the gap between the first set of heaters and when the sample container is within the first temperature zone,
(ii) to narrow the gap between the second set of heaters when the sample container is within the second temperature zone, and (iii) to widen the gap between the first and second sets of heaters to allow the shuttle motor to physically align the sample container within the first and/or second temperature zones.
2. A method of processing and analyzing a sample, comprising:
(a) providing a device of claim 1 ;
(b) placing a sample in the sample container; and
(b) shuttling the sample cassette between positions in which the sample container resides within the first temperature zone and the second temperature zone according to a programmed cycle;
wherein the sample container is maintained in the first temperature zone for sufficient time to bring the sample to a first temperature, and wherein the sample container is maintained in the second temperature zone for sufficient time to bring the sample to a second temperature.
3. The method of claim 2 , wherein the sample is cycled through the first and second temperature zones for 10 or more cycles.
4. The device of claim 1 , wherein the sample holder is a sample arm, the sample cassette is connected to a first end of the sample arm and the shuttle motor is connected to a second end of the sample arm.
5. The device of claim 1 , wherein the sample holder is a sample disc, the sample cassette is connected to a first position on the sample disc and the shuttle motor is connected to the center of the sample disc.