Methods and Devices for Correlated, Multi-Parameter Single Cell Measurements and Recovery of Remnant Biological Material

• US 20090042737A1
• Filed: 08/08/2008
• Published: 02/12/2009
• Est. Priority Date: 08/09/2007
• Status: Abandoned Application

• Current Assignee: Progenity, Inc. (Athyrium Capital Management LP)
• Original Assignee: Progenity, Inc. (Athyrium Capital Management LP)
• Inventors: Zhang, Yi, Ahn, Keunho, Katz, Andrew S., Zhang, Haichuan
• Application Number:
  US12/188,999
• Publication Number:
  US 20090042737A1
• Time in Patent Office: Days
• US Class Current: 506/10
• CPC Class Codes: B01L 2200/027 for microfluidic devices
• CPC Class Codes: B01L 2200/0647 Handling flowable solids, e.g. microscopic beads, cells, particles
• CPC Class Codes: B01L 2200/0673 Handling of plugs of fluid surrounded by immiscible fluid
• CPC Class Codes: B01L 2200/10 Integrating sample preparation and analysis in single entity, e.g. lab-on-a-chip concept
• CPC Class Codes: B01L 2300/0663 Whole sensors
• CPC Class Codes: B01L 2300/087 Multiple sequential chambers
• CPC Class Codes: B01L 2300/0877 Flow chambers
• CPC Class Codes: B01L 2300/0887 Laminated structure
• CPC Class Codes: B01L 2300/1822 using Peltier elements
• CPC Class Codes: B01L 2300/1827 using resistive heater
• CPC Class Codes: B01L 2400/0487 fluid pressure, pneumatics
• CPC Class Codes: B01L 3/502761 specially adapted for handling suspended solids or molecules independently from the bulk fluid flow, e.g. for trapping or sorting beads, for physically stretching molecules investigating characteristics of particles G01N15/00
• CPC Class Codes: B01L 7/525 with physical movement of samples between temperature zones
• CPC Class Codes: G01N 15/1484 microstructural devices
• CPC Class Codes: G01N 15/149 specially adapted for sorting particles, e.g. by their size or optical properties

Abstract

Methods and apparatus are provided for analysis and correlation of phenotypic and genotypic information for a high throughput sample on a cell by cell basis. Cells are isolated and sequentially analyzed for phenotypic information and genotypic information which is then correlated. Methods for correlating the phenotype-genotype information of a sample population can be performed on a continuous flow sample within a microfluidic channel network or alternatively on a sample preloaded into a nano-well array chip. The methods for performing the phenotype-genotype analysis and correlation are scalable for samples numbering in the hundreds of cells to thousands of cells up to the tens and hundreds of thousand cells.

Claims

1. An integrated structure for microfluidic single-cell analysis and correlating comprising:

a cartridge, the cartridge comprising

an optical window,

a plurality of reservoirs, including at least;

a sample reservoir,

a fluid reservoir, and

a reagent reservoir; and

a chip, the chip including at least;

a cell inlet channel, the cell inlet channel being fluidically coupled to the sample reservoir,

a first fluid inlet channel fluidically coupled to the fluid reservoir and the cell inlet channel,

a second fluid inlet channel fluidically coupled to the reagent reservoir and the cell inlet channel,

a serpentine channel comprising a first end which is fluidically coupled to the cell input channel downstream of the first and second fluid inlet channels and a plurality of parallel partitions having first and second ends and being fluidically connected to each other,

a plurality of venting vias located at the first and second ends of the plurality of partitions

the chip being disposed adjacent the optical window.

2. The integrated structure of claim 1, further comprising a lid, the lid including at least:

a pneumatic pressure port, the port having an inlet and being coupled to at least one of the sample reservoir and the fluid reservoir, and

a filter disposed between the inlet of the pneumatic pressure port and at least one of the sample reservoir and the fluid reservoir,

3. The integrated structure of claim 2, further comprising:

a manifold, the manifold coupling pneumatic pressure from a source to the pneumatic pressure port without intervening tubing.

4. The integrated structure of claim 1, wherein the cartridge further comprises a second fluid reservoir and the chip further comprises an encoding region wherein the second fluid reservoir is fluidically coupled to the cell input channel downstream of first fluid inlet channel and the second fluid inlet channel.

5. The integrated structure of claim 1, wherein the cartridge further comprises a waste reservoir and the chip further comprises a sorting region wherein the cell input channel is fluidically coupled to the waste reservoir.

6. The integrated structure of claim 3, wherein the sorting region comprises a lateral force switch.

7. The integrated structure of claim 6, wherein the lateral force switch is generated using optical forces, dielectrophoresis, or fluidic pulses.

8. The integrated structure of claim 1, wherein the serpentine channel is between 2.5-5 meters long.

9. The integrated structure of claim 1, wherein the serpentine channel comprises between 50-100 parallel partitions.

10. The integrated structure of claim 1, wherein the plurality of venting vias have a first seal configured to seal off the serpentine channel during loading and a second seal configured to isolate the venting vias from an outside environment.

11. The integrated structure of claim 10, wherein the second seal is mechanically compliant for thermal expansion and contraction

12. The integrated structure of claim 10, wherein the first seals each comprise a mechanical mechanism.

13. The integrated structure of claim 10, wherein the first seals each comprise a photoreactive material.

14. The integrated structure of claim 10, wherein the first seals each comprise a hydrophobic material.

15. The integrated structure of claim 10 wherein the second seal each comprises a thin film configured to isolate the serpentine channel from an outside environment.

16. The integrated structure of claim 1, wherein cartridge further comprises a venting reservoir having a filter and the plurality of venting vias are fluidically coupled to the venting reservoir.

17. The integrated structure of claim 1 further comprising a thermal module operably coupled to the serpentine channel to regulate the temperature of a fluid in the serpentine channel.

18. The integrated structure of claim 1, wherein the thermal module comprises a heating element and a thermal control element to repeatedly cycle the temperature of a fluid in the serpentine path.

19. The integrated structure of claim 18, wherein the heating element comprises a heat block.

20. The integrated structure of claim 19, wherein the heating element comprises hot air.

21. The integrated structure of claim 1, further comprising a plurality of chips wherein the cartridge is configured to connect the plurality of reservoirs to the plurality of chips.

22. The integrated structure of claim 21, wherein the cartridge further comprises one or more valves for fluidically connecting the plurality of reservoirs to the plurality of chips.

23. The integrated structure of claim 1, further comprising a plurality of chips, wherein the cartridge further comprises a plurality of sample reservoirs each configured to fluidically connect to a cell input on one of the plurality of chips.

24. The integrated structure of claim 23, wherein the cartridge further comprises a plurality of fluid reservoirs each configured to fluidically connect to a first fluid inlet channel on one of the plurality of chips and a plurality of reagent reservoirs each configured to fluidically connect to a second fluid inlet channel on one of the plurality of chips.

25. An integrated structure for microfluidic single-cell analysis and correlating comprising:

a cartridge, the cartridge comprising

an optical window,

a plurality of reservoirs, including at least;

a sample reservoir,

a fluid reservoir, and

a reagent reservoir;

a lid, the lid including at least;

at least one pneumatic pressure port, the port having an inlet and being coupled to at least one of the sample reservoir and the fluid reservoir, and

a filter disposed between the inlet of the pneumatic pressure port and at least one of the sample reservoir and the fluid reservoir, and

a manifold, the manifold coupling pneumatic pressure from a source to the pneumatic pressure port without intervening tubing.

a chip, the chip including at least;

a cell inlet channel adapted to receive one or more cells in a fluidic medium, the cell inlet channel being fluidically coupled to the sample reservoir,

a first fluid inlet channel fluidically coupled to the fluid reservoir and the cell inlet channel,

a second fluid inlet channel fluidically coupled to the reagent reservoir and the cell inlet channel,

an outlet channel fluidically coupled to the cell inlet channel downstream of the first fluid inlet channel and the second fluid inlet channel

the chip being at least partially disposed adjacent the optical window; and

a capillary tube fluidically coupled to the outlet channel.

26. The integrated structure of claim 25, wherein the capillary tube is between 500-1000 mm in length.

27. The integrated structure of claim 25, wherein the first fluid inlet channel is fluidically coupled to the cell inlet channel downstream of the second fluid inlet channel.

28. The integrated structure of claim 25, wherein the cartridge further comprises a waste reservoir and the chip further comprises a sorting region wherein the cell input channel is fluidically coupled to the waste reservoir.

29. A microfluidic chip for single cell analysis and correlation comprising:

a loading zone comprising;

a cell inlet channel, the cell inlet channel configured to be fluidically coupled to a sample source,

a first fluid inlet channel having first and second ends, the first end configured to be fluidically coupled to reagent source and the second end fluidically coupled to the cell inlet channel; and

a second fluid inlet channel having first and second ends, the first end configured to be fluidically coupled to fluid source and the second end fluidically coupled to the cell inlet channel downstream of the first fluid inlet channel;

an analysis zone comprising

a serpentine channel comprising a first end which is fluidically coupled to the cell input channel downstream of the first and second fluid inlet channels and a plurality of parallel partitions having first and second ends and being fluidically connected to each other,

a plurality of venting vias located at the first and second ends of the plurality of partitions.

30. The microfluidic chip of claim 29, wherein the plurality of venting vias further comprise a first seal configured to seal off the serpentine channel and a second seal configured to isolate the venting vias form an outside environment.

31. The microfluidic chip of claim 30, wherein the first seals each comprise a mechanical mechanism.

32. The microfluidic chip of claim 30, wherein the first seals each comprise a photoreactive material.

33. The microfluidic chip of claim 30, wherein the first seals each comprise a hydrophobic material.

34. The microfluidic chip of claim 30, wherein the second seal each comprises a thin film configured to isolate the serpentine channel from an outside environment.

35. The microfluidic chip of claim 29, wherein the serpentine channel is between 2.5-5 meters long.

36. The microfluidic chip of claim 29, wherein the serpentine channel comprises between 50-100 parallel partitions.

37. The microfluidic chip of claim 29, further comprising multiple sections each comprising a loading zone and an analysis zone.

38. The microfluidic chip of claim 37, further comprising four sections wherein the serpentine channel in each analysis zone in between 2.5 to 5 meters long and is partitioned into 50-100 parallel segments.

39. A method of correlating phenotypic and genotypic information on a cell by cell basis comprising:

providing a first solution containing a plurality of cells and at least one reagent for amplifying a target DNA sequence and a second solution that is immiscible with the first solution;

sequentially analyzing the phenotype of each cell in the first solution;

combining the first solution and second solution such that a stream comprising a plurality of nanoliter microvessels are formed, wherein a majority of the nanoliter microvessels encapsulate a single cell or remain empty of cells;

encoding the stream of nanoliter microvessels with a reference signal;

subjecting the nanoliter microvessels to thermal conditions suitable to amplify the target DNA;

measuring gene expression in each microreactor; and

decoding the reference signal to correlate the measurement of gene expression from each microreactor with the phenotype of the cell in the microreactor.

40. The method of claim 39, wherein amplifying the target DNA comprises performing isothermal amplification.

41. The method of claim 39, wherein the thermal conditions comprise repetitive thermal cycling

42. The method of claim 41, wherein amplifying the target DNA comprises performing qPCR, realtime PCR or end-point PCR.

43. The method of claim 39, wherein the reference signal is contained in the microreactor.

44. The method of claim 43, wherein the reference signal is created by generating a pseudorandom pattern of microbeads or a dye contained in the stream of nanoliter microvessels.

45. The method of claim 39, wherein the reference signal is created by generating a pseudorandom spacing pattern between the nanoliter microvessels.

46. The method of claim 39, wherein the reference signal is created by pseudorandomly varying the size of the nanoliter microvessels.

47. The method of claim 39, further comprising imaging the stream of nanoliter microvessels after the stream has been encoded with the reference signal to create an index.

48. The method of claim 39, wherein analyzing the phenotype comprises measuring a fluorescent signal.

49. The method of claim 39, wherein analyzing the phenotype comprises performing multiple phenotypic measurements.

50. The method of claim 39, further comprising sorting the cells based on the phenotypic measurement into target cells and non-target cells wherein the non-target cells are diverted to a waste reservoir.

51. The method of claim 39, further comprising lysing the cells in the nanoliter microvessels.

52. The method of claim 51, wherein the cell lysis is performed by osmotic shock, heat, laser lysing, or ultrasound.

53. The method of claim 39, wherein the gene expression is measured by real-time or quantitative PCR.

54. The method of claim 39, wherein measuring the gene expression comprises measuring the absorption of the genetic material.

55. The method of claim 39, wherein measuring the gene expression comprises measuring the absorption by a probe or dye which binds to DNA products or to by-products of DNA amplification.

56. The method of claim 39, further comprising sorting the stream of nanoliter microvessels based on the measurement of gene expression.

57. The method of claim 39, further comprising introducing said first solution and said second solution into a microfluidic network.

58. The method of claim 57, wherein said microfluidic network comprises:

a loading zone comprising at least first and second flow channels for combing said first and second solutions such that a stream comprising a plurality of nanoliter microvessels is formed,

an encoding region, and

an analysis zone comprising

a serpentine flow channel having a plurality of parallel partitions having first and second ends and being fluidically connected to each other, and

a plurality of venting vias located at the first and second ends of the plurality of partitions, and

a decoding region.

59. The method of claim 39, wherein the stream of nanoliter microvessels is sorted into an array of nanofluidic micro-wells such that each well contains a single microreactor and wherein the step of subjecting the nanoliter microvessels to repetitive temperature cycling subjecting the array of micro-wells to repetitive temperature cycling.

60. The method of claim 39, wherein the plurality of nanoliter microvessels comprises at least 1000 nanoliter microvessels.

61. The method of claim 60, wherein the plurality of nanoliter microvessels comprises at least 10,000 nanoliter microvessels.

62. The method of claim 61, wherein the plurality of nanoliter microvessels comprises at least 100,000 nanoliter microvessels.

63. An integrated system for providing correlated phenotypic and genotypic analysis on individual cells in a microfluidic network comprising:

a sample source comprising an aqueous solution containing a plurality of cells;

an encapsulation source comprising a hydrophobic fluid;

a microfluidic network comprising;

a loading zone comprising;

a sample flow channel fluidically coupled to the sample source;

a lateral flow channel fluidically coupled to the fluid reservoir and the sample flow channel, and

a controller configured to direct flow conditions in the lateral flow channel such that the sample source is partitioned into a plurality of nanoliter microvessels, and

an analysis zone comprising;

a serpentine channel comprising a first end which is fluidically coupled to the cell input channel downstream of the reagent inlet and lateral flow channels and a plurality of parallel partitions having first and second ends and being fluidically connected to each other,

a plurality of venting vias located at the first and second ends of the plurality of partitions

a first optical detector operably coupled to the sample flow channel, the detector configured to measure a signal from the nanoliter microvessels in the sample flow channel;

a thermal module comprising a heating element and a thermal control element operably coupled to the analysis zone;

an excitation light source configured to illuminate the serpentine channel at a certain wavelength;

a second optical detector configured to detect and measure an amplified product from the nanoliter microvessels in the serpentine channel; and

a processor connected to the optical detectors for recording and correlating signals detected by the first and second optical detectors.

64. The integrated system of claim 63, wherein the microfluidic network further comprises an encoding region configured to apply a reference signal to the plurality of nanoliter microvessels.

65. The integrated system of claim 64, further comprising a decoding sensor configured to decode the reference signals encoded on the nanoliter microvessels.

66. The integrated system of claim 63, wherein the thermal control module is configured to repeatively cycle the temperature of the analysis zone through temperatures suitable for achieving PCR.

67. The integrated system of claim 63, wherein the loading zone further comprises a sorting region configured to measure a physical characteristic of the plurality of cells in the sample source and sort the sample source based on the physical characteristic.

68. The integrated system of claim 67, wherein the sorting region comprises a switch.

69. The integrated system of claim 67, wherein the sorting region is fluidically connected to a waste reservoir.

70. The integrated system of claim 63, further comprising a reagent source comprising a solution of one or more reagents required for amplifying a target DNA sequence and wherein the loading zone further comprises a reagent flow channel fluidically coupled to the reagent source and the sample flow channel for introducing the reagent source into the sample flow channel.

71. The integrated system of claim 63, wherein the analysis zone further comprises a sorting switch configured to sort the nanoliter microvessels based on the measurement of the amplified product in the microreactor.

72. The integrated system of claim 63, wherein the processor comprises an error correction algorithm.

73. A method of correlating phenotypic and genotypic information on a cell by cell basis in a microfluidic environment comprising:

providing a sample solution containing a plurality of cells in an aqueous environment and an encapsulation solution that is immiscible with the sample solution;

introducing the sample solution and the encapsulation solution into a microfluidic network;

sequentially measuring the phenotype of each cell in the sample solution;

combining the sample solution and the encapsulation solution within the microfluidic network such that such that the sample solution is partitioned into a plurality of nanoliter microvessels;

encoding the stream of nanoliter microvessels with a reference signal;

loading the plurality of nanoliter microvessels in a serpentine channel comprising a plurality of parallel partitions having first and second ends and being fluidically connected to each other and a plurality of venting vias located at the first and second ends of the plurality of partitions;

subjecting the serpentine channel to repetitive temperature cycling to amplify a target DNA sequence in the plurality of nanoliter microvessels;

measuring the amplified product in the plurality of nanoliter microvessels; and

decoding the reference signal to correlate the measurement of amplified product from each microreactor with the phenotype measurement of the cell in each microreactor.

74. The method of claim 73, wherein the step of combining comprises

introducing the sample solution into a sample flow channel;

introducing the encapsulation solution into a lateral flow channel fluidically coupled the sample flow channel, and

directing flow conditions in the lateral flow channel to such that the sample solution in the sample flow channel downstream of the lateral flow channel is partitioned into a plurality of nanoliter microvessels.

75. The method of claim 73, wherein the microfluidic network further comprises a waste reservoir, further comprising the step of sorting the cells in the sample solution based on the phenotype measurement into target and non-target cells and transferring the non-target cells to the waste reservoir.

76. The method of claim 73, wherein the temperature cycling comprises subjecting the serpentine channel to heated air.

77. The method of claim 73, wherein the plurality of venting vias comprise a mechanical seal configured to seal of the serpentine channel during loading.

78. The method of claim 77, wherein the plurality of venting vias are configured to minimize thermal expansion along the stream of nanoliter microvessels in the serpentine channel when the serpentine channel is subject to repetitive temperature cycling.

79. The method of claim 78, wherein the plurality of venting vias comprise a seal configured to isolate the serpentine channel from an outside environment during temperature cycling.

80. The method of claim 79, wherein amplifying a target DNA sequence comprises performing quantitative PCR.

81. The method of claim 80, wherein amplifying a target DNA sequence comprise performing multiple quantitative PCR cycles.

82. The method of claim 73, wherein more than 90% of the plurality of nanoliter microvessels contain one or zero cells.

83. The method of claim 73, wherein more than 80% of the plurality of nanoliter microvessels contain one or zero cells.

84. The method of claim 73, wherein more than 70% of the plurality of nanoliter microvessels contain one or zero cells.