Inline-injection microdevice and microfabricated integrated DNA analysis system using same
First Claim
Patent Images
1. A microfabricated structure comprising:
- a) a sample channel defining a flow path between a first location and a second location and comprising;
i. a capture channel region comprising a capture matrix;
ii. a separation channel region, wherein the structure of the capture channel region and the separation channel region is characterized by at least one of the following;
1) the capture channel region contacts that separation channel region without intervening channels or
2) the capture channel region and at least a portion of the separation channel region are arranged in a continuous line along the sample channel, said line being a straight line or a line that deviates from 180°
by no more than about +/−
45°
;
b) a first electrode in electrical communication with the first location;
c) a waste port in fluid communication with the capture channel region;
d) a second electrode in electrical communication with the waste port, wherein a voltage applied between the first and second electrodes moves charged molecules through the capture channel region to the waste port; and
e) a third electrode in electrical communication with the second location, wherein a voltage applied between the first and third electrodes moves charged molecules from the capture channel region through the separation channel region, wherein the sample channel, first electrode, second electrode and third electrode are all integrated into the same microfabricated structure.
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Abstract
Methods and microfluidic circuitry for inline injection of nucleic acids for capillary electrophoresis analysis are provided. According to various embodiments, microfabricated structures including affinity-based capture matrixes inline with separation channels are provided. The affinity-based capture matrixes provide inline sample plug formation and injection into a capillary electrophoresis channel. Also provided are methods and apparatuses for a microbead-based inline injection system for DNA sequencing.
256 Citations
42 Claims
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1. A microfabricated structure comprising:
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a) a sample channel defining a flow path between a first location and a second location and comprising; i. a capture channel region comprising a capture matrix; ii. a separation channel region, wherein the structure of the capture channel region and the separation channel region is characterized by at least one of the following;
1) the capture channel region contacts that separation channel region without intervening channels or
2) the capture channel region and at least a portion of the separation channel region are arranged in a continuous line along the sample channel, said line being a straight line or a line that deviates from 180°
by no more than about +/−
45°
;b) a first electrode in electrical communication with the first location; c) a waste port in fluid communication with the capture channel region; d) a second electrode in electrical communication with the waste port, wherein a voltage applied between the first and second electrodes moves charged molecules through the capture channel region to the waste port; and e) a third electrode in electrical communication with the second location, wherein a voltage applied between the first and third electrodes moves charged molecules from the capture channel region through the separation channel region, wherein the sample channel, first electrode, second electrode and third electrode are all integrated into the same microfabricated structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A process of introducing an analyte in a sample to a separation channel comprising:
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providing a microfabricated structure comprising; a) a sample channel defining a flow path between a first location and a second location and comprising; i. a capture channel region comprising a capture matrix; ii. a separation channel region, wherein the structure of the capture channel region and the separation channel region is characterized by at least one of the following;
1) the capture channel region contacts that separation channel region without intervening channels or
2) the capture channel region and at least a portion of the separation channel region are arranged in a continuous line along the sample channel, said line being a straight line or a line that deviates from 180°
by no more than about +/−
45°
;b) a first electrode in electrical communication with the first location; c) a waste port in fluid communication with the capture channel region; d) a second electrode in electrical communication with the waste port, wherein a voltage applied between the first and second electrodes moves charged molecules through the capture channel region to the waste port; and e) a third electrode in electrical communication with the second location, wherein a voltage applied between the first and third electrodes moves charged molecules from the capture channel region through the separation channel region; introducing a sample containing an analyte to the sample channel region; driving the analyte in the sample to the capture channel region containing the capture matrix, said matrix having a selective affinity for the analyte; forming a concentrated sample plug in the capture channel region; and inline injecting the concentrated sample plug from the capture channel region into the separation channel region. - View Dependent Claims (24, 25, 26, 27)
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28. A process for performing sequencing comprising:
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providing a microfabricated structure comprising; a) a sample channel defining a flow path between a first location and a second location and comprising; i. a capture channel region comprising a capture matrix; ii. a separation channel region, wherein the structure of the capture channel region and the separation channel region is characterized by at least one of the following;
1) the capture channel region contacts that separation channel region without intervening channels or
2) the capture channel region and at least a portion of the separation channel region are arranged in a continuous line along the sample channel, said line being a straight line or a line that deviates from 180°
by no more than about +/−
45°
;b) a first electrode in electrical communication with the first location c) a waste port in fluid communication with the capture channel region; d) a second electrode in electrical communication with the waste port, wherein a voltage applied between the first and second electrodes moves charged molecules through the capture channel region to the waste port; and e) a third electrode in electrical communication with a second location, wherein a voltage applied between the first and third electrodes moves charged molecules from the capture channel region through the separation channel region; distributing microreactor elements with DNA sequencing templates into thermal cycling chambers, wherein each microreactor element has multiple clonal copies of a single unique sequencing template; producing thermal cycling extension fragments from the microreactor elements carrying multiple copies of a sequencing template; forming a concentrated sample plug of the extension fragments in the capture channel region comprising the capture matrix; inline injecting the sample plug from the capture matrix into the separation channel; and separating the extension fragments in the separation channel. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A process for performing sequencing comprising:
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providing a microfabricated structure comprising; a) a plurality of sample channels each comprising; i. a thermal cycling chamber; ii. a capture channel region comprising a capture matrix; iii. a separation channel region, wherein the structure of the capture channel region and the separation channel region is characterized by at least one of the following;
1) the capture channel region contacts that separation channel region without intervening channels or
2) the capture channel region and at least a portion of the separation channel region are arranged in a continuous line along the sample channel, said line being a straight line or a line that deviates from 180°
by no more than about +/−
45°
;b) a first electrode in electrical communication with a first end of each of the plurality of sample channels; c) one or more waste ports in fluid communication with the capture channel regions; d) a second electrode in electrical communication with the each of the one or more waste ports, wherein a voltage applied between the first and second electrodes moves charged molecules through a capture channel region to a waste port; and e) a third electrode in electrical communication with a second end of each of the sample channels, wherein a voltage applied between the first and third electrodes moves charged molecules from the capture channel region through the separation channel region; distributing microreactor elements with DNA sequencing templates into thermal cycling chambers, wherein each microreactor element has multiple clonal copies of a single unique sequencing template; producing thermal cycling extension fragments from the microreactor elements carrying multiple copies of a sequencing template; forming a concentrated sample plug of the extension fragments in a capture channel region comprising a capture matrix; and injecting the sample plug from the capture matrix into a separation channel, wherein at least about 50% of the extension fragments produced are injected into the separation channel. - View Dependent Claims (38, 39, 40)
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41. A method comprising:
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providing a microfabricated structure comprising; a) a sample channel defining a flow path between a first location and a second location and comprising; i. a capture channel region comprising a capture matrix; ii. a separation channel region, wherein the structure of the capture channel region and the separation channel region is characterized by at least one of the following;
1) the capture channel region contacts that separation channel region without intervening channels or
2) the capture channel region and at least a portion of the separation channel region are arranged in a continuous line along the sample channel, said line being a straight line or a line that deviates from 180°
by no more than about +/−
45°
;b) a first electrode in electrical communication with the first location; c) a waste port in fluid communication with the capture channel region; d) a second electrode in electrical communication with the waste port, wherein a voltage applied between the first and second electrodes moves charged molecules through the capture channel region to the waste port; and e) a third electrode in electrical communication with the second location, wherein a voltage applied between the first and third electrodes moves charged molecules from the capture channel region through the separation channel region; providing in the sample channel a sample comprising analyte molecules and non-analyte molecules; applying an electrical potential across a fluid path comprising a capture channel region and the waste port, wherein non-analyte molecules are moved by the electrical potential to the waste port; releasing captured analyte molecules from the capture matrix; applying an electrical potential across a second fluid path comprising the capture channel region and the separation channel region to move analyte molecules through the separation channel, whereby analyte molecules are resolved; and detecting the resolved analyte molecules. - View Dependent Claims (42)
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Specification