Integrated nucleic acid diagnostic device

Claims

What is claimed is:

1. A miniature fluidic system, comprising:

a body having at least two discrete reaction chambers, each of said reaction chambers comprising at least one vent port, and wherein each of said reaction chambers is fluidly connected to a common chamber or channel by a fluidic inlet having a controllable diaphragm valve disposed thereacross; and

a pneumatic system for selectively applying a pressure differential between said common channel or chamber and at least a selected one of said at least two discrete chambers, whereby said pressure differential directs a fluid sample in said body between said common channel or chamber and said at least one selected chamber.

2. The system of claim 1, wherein said vent port comprises a gas permeable fluid barrier disposed across said vent port.

3. The system of claim 2, wherein said gas permeable fluid barrier is a hydrophobic membrane.

4. The system of claim 1, wherein at least one of said at least two chambers is a debubbling chamber, said debubbling chamber comprising at least two vent ports, one of said at least two vent ports being disposed at an intermediate position in said chamber, whereby a bubble separating at least two discrete fluid plugs in said chamber may exit said chamber allowing said at least two discrete fluid plugs to connect.

5. The system of claim 1, wherein said pneumatic system is further capable of applying a pressure differential to said diaphragm valve to deflect said diaphragm valve.

6. The system of claim 5, wherein deflection of said diaphragm valve opens said fluid connection.

7. The system of claim 1, wherein each of said chambers has a cross sectional dimension of from about 0.05 to about 20 mm, and a depth dimension of from about 0.05 to about 5 mm.

8. The system of claim 1, wherein said at least two chambers are fluidly connected via a fluid passage, said fluid passage having a cross-sectional dimension of from about 10 .mu.m to about 1000 .mu.m, and a depth dimension of from about 1 to 500 .mu.m.

9. The system of claim 1, wherein said pneumatic system comprises a pneumatic manifold for applying a differential pressure between said at least first chamber and said at least second chamber, to move said fluid sample from said at least first chamber to said at least second chamber.

10. The system of claim 1, wherein said pneumatic system comprises a differential pressure delivery system for maintaining said at least first chamber at a first pressure and said second chamber at a second pressure, said first pressure being greater than ambient pressure and said second pressure being greater than said first pressure, whereby when said second chamber is brought to ambient pressure, said first pressure forces a liquid sample in said first chamber into said second chamber.

11. The system of claim 10 wherein said differential pressure delivery system comprises:

a pressure source;

at least first and second passages fluidly connecting said pressure source to said at least first and second chambers, respectively;

a first fluidic resistance disposed in said first passage between said pressure source and said first chamber, said first fluidic resistance transforming a pressure from said pressure source to said first pressure;

a second fluidic resistance disposed in said second passage between said pressure source and said second chamber, said second fluidic resistance transforming said pressure from said pressure source to said second pressure; and

first and second openable closures in said first and second chambers, respectively, whereby opening of said first or second closures allows said first or second chambers to achieve ambient pressure.

12. The miniature system of claim 11, wherein said first and second fluidic resistances independently comprise one or more fluid passages connecting said first and second passages to said first and second chambers, said first fludic reistance having a smaller cross-sectional area than said second fluidic resistance.

13. The system of claim 1, wherein said pneumatic system comprises a differential pressure delivery system for maintaining said first chamber at a first pressure and said second chamber at a second pressure, said second pressure being less than ambient pressure and said first pressure being less than said second pressure, whereby when said first chamber is brought to ambient pressure, said second pressure draws a liquid sample in said first chamber into said second chamber.

14. The system of claim 13, wherein said differential pressure delivery system comprises:

a pressure source;

at least first and second passages fluidly connecting said pressure source to said at least first and second chambers, respectively;

a first fluidic resistance disposed in said first passage between said pressure source and said first chamber, said first fluidic resistance transforming a pressure from said pressure source to said first pressure;

a second fluidic resistance disposed in said second passage between said pressure source and said second chamber, said second fluidic resistance transforming said pressure from said pressure source to said second pressure; and

first and second openable closures in said first and second chambers, respectively, whereby opening of said first or second closures allows said first or second chambers to achieve ambient pressure.

15. The system of claim 14, wherein said first and second fluidic resistances independently comprise one or more fluid passages connecting said first and second passages to said first and second chambers, said first fludic reistance having a larger cross-sectional area than said second fluidic resistance.

16. The system of claim 1, wherein said system further includes a temperature controller disposed adjacent at least one of said at least two chambers, for controlling a temperature within said at least one chamber.

17. The system of claim 16, wherein said temperature controller comprises a thermoelectric temperature controller.

18. The system of claim 16, wherein said temperature controller comprises a resistive heater.

19. The system of claim 18, wherein said resistive heating element is a NiCr/polyimide/copper laminate heating element.

20. The system of claim 16, further comprising a temperature sensor disposed within said temperature controlled chamber.

21. The system of claim 20, wherein said temperature sensor is a thermocouple.

22. The system of claim 20, wherein said temperature sensor is a resistance thermometer.

23. The system of claim 1, wherein at least one of said at least two chambers is a cell lysis chamber and comprises a cell lysis system disposed therein, for lysing cells in a fluid sample.

24. The system of claim 23, wherein said cell lysis system comprises an acoustic energy source disposed adjacent said cell lysis chamber.

25. The system of claim 23, wherein said cell lysis chamber includes microstructures fabricated on an internal surface of said cell lysis chamber for enhancing cell lysis.

26. The system of claim 23, wherein said cell lysis chamber includes an electrolytic pH control system for altering a pH of said cell lysis chamber.

27. The system of claim 1, wherein at least one of said at least two chambers is a hybridization chamber for analyzing a component of a fluid sample, said hybridization chamber including a polymer array, said polymer array including a plurality of different polymer sequences coupled to a surface of a single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

28. The system of claim 27, wherein said polymer array comprises at least 100 different polymer sequences coupled to said surface of said single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

29. The system of claim 27, wherein said polymer array comprises at least 1000 different polymer sequences coupled to said surface of said single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

30. The system of claim 27, wherein said polymer array comprises at least 10,000 different polymer sequences coupled to said surface of said single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

31. The system of claim 1, wherein at least one of said at least two chambers comprises a nucleic acid amplification system.

32. The system of claim 31, wherein said nucleic acid amplification includes a system for cycling a fluid sample in said at least one chamber between at least two different temperatures.

33. The system of claim 32, wherein said system for cycling comprises at least two separate temperature controlled chambers, said at least two chambers being maintained at at least two different temperatures, whereby said sample is cycled between said at least two temperatures by moving said fluid sample back and forth between said at least two temperature controlled chambers.

34. The system of claim 1, wherein at least one of said at least two chambers comprises a nucleic acid purification system for separating nucleic acids in said sample from other contaminants in said sample.

35. The system of claim 34, wherein said nucleic acid purification system comprises a separation matrix for separating said nucleic acids from said contaminants.

36. The system of claim 35, wherein said separation matrix comprises functional groups for preferentially binding said nucleic acids in said sample.

37. The system of claim 36, wherein said functional groups comprise poly-T oligonucleotides.

38. The system of claim 35, wherein said nucleic acid purification system further comprises an electrophoretic system for applying an electric field to said fluid sample to separate said nucleic acids from said contaminants.

39. The system of claim 35, wherein said separation matrix comprises a gel matrix.

40. The system of claim 35, wherein said separation matrix comprises a membrane disposed between said sample and an anode of said electrophoretic system.

41. The system of claim 1, wherein at least one of said at least two chambers is a reverse transcription chamber, said reverse transcription chamber having disposed therein an effective amount of a reverse transcriptase enzyme and the at least four deoxynucleoside triphosphates.

42. The system of claim 1, wherein at least one of said at least two chambers is an in vitro transcription chamber, said in vitro transcription chamber having an effective amount of an RNA polymerase and at least four different nucleoside triphosphates, disposed therein.

43. The system of claim 1, wherein at least one of said at least two chambers comprises a nucleic acid fragmentation system, for fragmenting a nucleic acid in a fluid sample.

44. The system of claim 43, wherein said fragmentation system comprises a focused piezoelectric element disposed adjacent said fragmentation chamber.

45. The system of claim 44, wherein said fragmentation system further comprises a series of microstructures fabricated on a first surface of said chamber.

46. The system of claim 43, wherein said fragmentation system comprises at least one channel through which said fluid sample is pumped, said channel having a submicron cross-sectional dimension for generating a high-shear rate.

47. The system of claim 1, further comprising a fluid mixing system for mixing said fluid sample within at least one of said at least two chambers.

48. The system of claim 47, wherein said fluid mixing system comprises a piezoelectric element disposed adjacent at least one of said at least two chambers.

49. The system of claim 47, wherein said fluid mixing system comprises a separate chamber adjacent to and fluidly connected to said at least one of said at least two chambers, whereby said fluid sample is flowed between said at least one chamber and said separate chamber to mix said fluid sample.

50. The system of claim 47, wherein said mixing system comprises:

a plurality of metallic particles disposed within said at least one chamber;

an electromagnetic field generator adjacent said at least one chamber, whereby when said electromagnetic field generator is activated, said metallic particles are vibrated within said at least one chamber mixing contents of said chamber.

51. The system of claim 47, wherein said mixing system mixes a fluid sample contained in a hybridization chamber.

52. A miniature fluidic system, comprising:

a body having at least first and second chambers disposed therein, at least one of said first and second chambers having a vent port with a gas/liquid separator disposed thereacross, each of said at least first and second chambers having a fluid inlet with a controllable diaphragm valve disposed thereacross, said at least first and second chambers being in fluid connection, and at least one of said at least first and second chamber being a hybridization chamber for analyzing a component of a fluid sample, said hybridization chamber including a polymer array, said polymer array including a plurality of different polymer sequences coupled to a surface of a single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location;

a sample inlet, fluidly connected to at least one of said first and second chambers, for introducing a fluid sample into said system;

a fluid transport system for moving a fluid sample from said at least first chamber to said at least second chamber.

53. The system of claim 52, wherein said polymer array comprises at least 100 different polymer sequences coupled to said surface of said single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

54. The system of claim 52, wherein said polymer array comprises at least 1000 different polymer sequences coupled to said surface of said single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

55. The system of claim 52, wherein said polymer array comprises at least 10,000 different polymer sequences coupled to said surface of said single substrate, each of said plurality of different polymer sequences being coupled to said surface in a different, known location.

56. The system of claim 52, wherein said body further comprises a transparent region disposed over said hybridization chamber for detecting hybridization of a component of said fluid sample to said polymer array.

57. The system of claim 52, wherein said fluid transport system comprises a micropump disposed in said body and fluidly connected to at least one of said plurality of chambers.

58. The system of claim 57, wherein said micropump comprises an electrophoretic pump.