Single polymer matrix unit chromatography

• US 20020192714A1
• Filed: 05/22/2002
• Published: 12/19/2002
• Est. Priority Date: 05/22/2001
• Status: Abandoned Application

• Current Assignee: University of Vermont & State Agricultural College
• Original Assignee: University of Vermont & State Agricultural College
• Inventors: Maughan, David W.
• Application Number:
  US10/153,434
• Publication Number:
  US 20020192714A1
• Time in Patent Office: Days
• US Class Current: 435/7.1
• CPC Class Codes: A61K 38/00 Medicinal preparations containing peptides peptides containing beta-lactam rings A61K31/00; cyclic dipeptides not having in their molecule any other peptide link than those which form their ring, e.g. piperazine-2,5-diones, A61K31/00; ergot alkaloids of the cyclic peptide type A61K31/48; containing macromolecular compounds having statistically distributed amino acid units A61K31/74; medicinal preparations containing antigens or antibodies A61K39/00; medicinal preparations characterised by the non-active ingredients, e.g. peptides as drug carriers, A61K47/00
• CPC Class Codes: C07K 1/20 Partition-, reverse-phase or hydrophobic interaction chromatography
• CPC Class Codes: C07K 1/36 by a combination of two or more processes of different types

Abstract

A method and apparatus for physically separating polypeptide constituents of a sample fluid by (a) providing a sample fluid comprising a mixture of polypeptides of differing physical and/or chemical properties; (b) contacting the fluid with at least two individual polymer matrix units, each polymer matrix unit preferentially accepting a different set of polypeptides on the basis of one or more physical and/or chemical properties; and (c) extracting the set of polypeptides from each polymer matrix unit.

Claims

1. A method of physically separating polypeptide constituents of a sample fluid, the method comprising:

(a) providing a sample fluid comprising a mixture of polypeptides of differing physical and/or chemical properties;

(b) contacting the fluid with at least two individual polymer matrix units, each polymer matrix unit preferentially accepting a different set of polypeptides on the basis of one or more physical and/or chemical properties;

(c) extracting the set of polypeptides from each polymer matrix unit.

2. The method of claim 1 wherein step 1(c) comprises depositing one or more sample aliquots on one or more substrates, said depositing being accomplished by bringing each polymer matrix unit into contact with the substrate(s).

3. The method of claim 1 wherein the sample fluid is provided in an amount which is equal to or less than about 10 μ

l.

4. The method of claim 1 wherein the sample fluid is provided in an amount which is equal to or less than about 1 μ

l.

5. The method of claim 1 wherein the sample fluid is provided in an amount which is equal to or less than about 0.1 μ

l.

6. The method of claim 2 wherein each aliquot is equal to or less than about 100 pl of sample fluid.

7. The method of claim 2 wherein each aliquot is equal to or less than about 10 pl of sample fluid.

8. The method of claim 2 wherein each aliquot is equal to or less than about 1 pl of sample fluid.

9. The method of claim 2 wherein each polymer matrix unit has a size sufficient to permit the polymer matrix unit to deposit at least 100 100 pl sample aliquots.

10. The method of claim 2 wherein each polymer matrix unit has a size sufficient to permit the polymer matrix unit to deposit at least 100 10 pl sample aliquots.

11. The method of claim 2 wherein each polymer matrix unit has a size sufficient to permit the polymer matrix unit to deposit at least 100 1 pl sample aliquots.

12. The method of claim 2 further comprising maintaining each polymer matrix unit in the sample fluid for a time which is less than 300 seconds to permit sufficient hydration or equilibration of the polymer matrix unit to permit deposition of said sample aliquot(s).

13. The method of claim 2 further comprising maintaining each polymer matrix unit in the sample fluid for a time which is less than 30 seconds to permit sufficient hydration or equilibration of the polymer matrix unit to permit deposition of said sample aliquot(s).

14. The method of claim 2 further comprising maintaining each polymer matrix unit in the sample fluid for a time which is less than 3 seconds to permit sufficient hydration or equilibration of the polymer matrix unit to permit deposition of said sample aliquot(s).

15. The method of claim 1 wherein the one or more physical and/or chemical properties are selected from the group consisting of size, shape and charge.

16. The method of claim 1 wherein the polymer matrix units are initially pre-hydrated.

17. The method of claim 1 wherein the polymer matrix units are initially non-hydrated.

18. The method of claim 1 wherein the polymer matrix units are each formed from a polymer selected from the group consisting of cross-linked dextrans or agaroses.

19. The method of claim 1 wherein the polymer matrix units are arranged in an array.

20. The method of claim 1 wherein the polymer matrix units comprise at least one chromatography bead.

21. The method of claim 1 wherein the sample fluid comprises a bubble or droplet.

22. The method of claim 21 further comprising enriching the polypeptide content of the sample fluid by removing water therefrom.

23. The method of claim 22 wherein the water is removed using a polymeric matrix unit which absorbs water with out absorbing polypeptides.

24. The method of claim 1 wherein the sample fluid comprises an array of bubbles or droplets.

25. The method of claim 24 further comprising enriching the polypeptide content of the sample fluid by removing water therefrom.

26. The method of claim 25 wherein the water is removed using a polymeric matrix unit which absorbs water without absorbing polypeptides.

27. The method of claim 47 wherein one or more of the steps is automated.

28. The method of claim 1 wherein one or more of the steps is performed robotically.

29. The method of claim 1 wherein steps 1(a) and 1(c) are performed robotically.

30. The method of claim 2 wherein each polymer matrix unit is transported under oil from the sample fluid to the substrate.

31. The method of claim 1 wherein the substrate is coated with a support film.

32. The method of claim 31 wherein the support film comprises a formvar resin.

33. The method of claim 31 wherein the support film comprises a compound that preferentially absorbs ultraviolet laser light, thereby enhancing vaporization and ionization of polypeptides.

34. The method of claim 33 wherein the compound is 2,5-dihydroxybenzoic acid in ethanol.

35. The method of claim 31 wherein the support film comprises an enzyme for digesting polypeptides in the sample aliquot.

36. The method of claim 35 wherein the enzyme is trypsin.

37. The method of claim 31 wherein the support film comprises an inhibitor to prevent degradation of sample polypeptide.

38. The method of claim 37 wherein the inhibitor is a protease inhibitor.

39. The method of claim 2 wherein the sample aliquots are arranged in a 1D or 2D array.

40. The method of claim 2 wherein the sample aliquots are arranged in a grid format.

41. The method of claim 40 wherein the substrate comprises from about 10 to about 100 sample aliquots per square millimeter.

42. The method of claim 2 wherein sample aliquots are arranged in an arrays-in-array format.

43. The method of claim 1 wherein the polymer matrix units comprise a set of one or more particles which fractionate according to size and/or shape.

44. The method of claim 1 wherein the polymer matrix units comprise a set of one or more uncharged particles, so that valence of the polypeptide does not affect absorption by the uncharged particle(s).

45. The method of claim 1 wherein the polymer matrix units comprise a set of one or more anion exchangers, which bind or attract negatively charged biomolecules.

46. The method of claim 1 wherein the polymer matrix units comprise a set of one or more cation exchangers, which bind or attract positively charged biomolecules.

47. The method of claim 1 wherein:

(a) the polymer matrix units are mounted in array in, and extending through, a chromatography chip;

(b) the sample fluid contacts the polymer matrix units on a first side of the chromatography chip and the aliquots are stamped out on a second side of the chromatography chip.

48. The method of claim 47, wherein:

(a) the chromatography chip has channels etched in the first side thereof, and the polymer matrix units contact the channels;

(b) the chromatography chip is capped, so that fluid can be flowed through the channels; and

(c) the input fluid is flowed through the channels to bring the input fluid into contact with the polymer matrix units.

49. A method for fractionating polypeptides from a polypeptide source according to physical and/or chemical properties and analyzing said fractionated polypeptides, the method comprising:

(a) providing a polypeptide source;

(b) fractionating the polypeptide source to reduce the complexity of the polypeptide mixture and to provide a sample fluid;

(c) fractionating the polypeptides from (a) or (b) according to the method of claim 1;

(d) chemically and/or physically analyzing one or more of the sets produced in step (c).

50. The method of claim 49 further comprising contacting a substrate with each polymer matrix unit (or vice versa) to deposit one or more sample aliquots for chemical analysis.

51. The method of claim 49 wherein the polypeptide source is a biopsy.

52. The method of claim 49 wherein the polypeptide source is a biopsy from a needle or bioptome.

53. The method of claim 51 wherein the mass of cellular material analyzed from the biopsy is less than about 10 mg.

54. The method of claim 51 wherein the mass of cellular material analyzed from the biopsy is less than about 1 mg.

55. The method of claim 51 wherein the mass of cellular material analyzed from the biopsy is less than about 0.1 mg.

56. The method of claim 50 further comprising dehydrating the sample aliquot(s) in oil or using one or more organic solvents to create uniform residues of fractionated polypeptides.

57. The method of claim 50 further comprising washing the target grid with xylene to remove the oil and to facilitate the production of uniform spots of dried residue prior to step 49(d).

58. The method of claim 50 comprising depositing multiple sample aliquots from each polymer matrix unit.

59. The method of claim 50 further comprising depositing one or more reference aliquots for analysis with said sample aliquots.

60. The method of claim 49 wherein step 49(d) comprises a determination of mass to charge ratio.

61. The method of claim 60 wherein step 49(d) is accomplished using mass spectrometry.

62. The method of claim 61 wherein step 49(d) is accomplished using laser desorption mass spectrometry.

63. The method of claim 62 wherein each aliquot subjected to laser desorption using a laser beam with a diameter which exceeds the diameter of the residue.

64. The method of claim 61 wherein step 49(d) is accomplished using matrix-assisted laser desorption time-of-flight mass spectrometry.

65. The method of claim 64 wherein each aliquot subjected to laser desorption using a laser beam with a diameter which exceeds the diameter of the residue.

66. The method of claim 49 wherein step 49(b) is accomplished robotically.

67. The method of claim 50 further comprising dehydration of the sample aliquots on the substrate prior to or as part of step 49(d).

68. The method of claim 50 further comprising correlating mass spectrum amplitude with amount of constituent polypeptide to provide a quantitative determination of amounts and concentrations of elemental isotopes and/or polypeptides in the sample aliquot(s).

69. The method of claim 50 further comprising analyzing calibration solutions alongside sample aliquots, wherein the calibration solutions contain known quantities of marker polypeptides representing a cellular compartment.

70. The method of claim 69 further comprising introducing known quantities of exogenous elements or compounds to the calibration and pre-fractionation solutions to serve as a standard for calculating sample volumes and/or polypeptide concentrations.

71. The method of claim 49 further comprising transmitting output from step 49(d) into a database.

72. The method of claim 49 further comprising:

(a) transmitting data output from step 49(d) to a computer processor for data analysis;

(b) performing computer analysis of said data.

73. The method of claim 72 wherein the data analysis step comprises identifying polypeptides according to a step selected from the group consisting of:

(a) comparing mass/charge ratios of primary species with reference mass/charge ratios;

(b) comparing mass/charge ratios of fragmentation products with reference mass/charge ratios; and

(c) comparing mass/charge ratios of enzymatically digested peptides with reference mass/charge ratios.

74. The method of claim 72 wherein the data analysis step comprises obtaining difference spectra and assigning spectra to polypeptides within a set of molecular weight ranges.

75. The method of claim 49 which does not employ gel electrophoresis.

76. The method of claim 49 employing arrays-in-array technology to facilitate high throughput sample analysis.

77. The method of claim 49 wherein step 49(b) is accomplished by a method comprising one or more of the following steps:

(a) accomplishing one or more washing steps to clear the sample of extracellular fluid and/or to clear solution and polypeptides of steps (b), (c) and/or (d);

(b) exposing the sample to a solution which solubilizes plasma membrane while leaving membranes of intracellular organelles intact, permitting cytosolic polypeptides to diffuse out of cells of the sample and to be separated from non-cytosolic cellular material;

(c) exposing the sample to a solution which solubilizes membranes of organelles, permitting organellar polypeptides to diffuse out of cells of the sample and to be separated from non-organellar cellular material; and

(d) exposing the sample to a solution which solubilizes cytomatrix polypeptides, permitting cytomatrix polypeptides to be separated from separated from non-cytomatrix cellular material.

78. The method of claim 77 wherein the solution of 77(b) comprises a detergent component.

79. The method of claim 78 wherein the detergent component comprises saponin.

80. The method of claim 77 wherein the solution of 77(c) comprises a detergent.

81. The method of claim 80 wherein the detergent component comprises triton X100.

82. The method of claim 77 wherein the solution of 77(d) comprises urea or other denaturants.

83. A method for reducing tissue damage in a subject undergoing a biopsy procedure for subsequent analysis, the method comprising obtaining a biopsy with a mass of less than 1 mg, and subsequently analyzing the tissue according to the method of claim 49.

131. A method for diagnosing a condition in a subject comprising:

obtaining a biological sample of tissue or cells from a subject,

fractionating the sample with the method of claim 1, and

determining the amount of one or more specific cellular components in the sample.

133. A method for determining onset, progression, or regression, of a disease in a subject, comprising:

obtaining a first biological sample of tissue or cells from a subject,

fractionating the sample with the method of claim 1,

determining the amount of one or more specific cellular components in the sample,

obtaining at a later time a second biological sample of tissue or cells from the subject,

determining the amount of one or more of the specific cellular components in the sample,

and comparing the determination of the one or more cellular components in the first sample and the second sample as a determination of the onset, progression, or regression of the disease.

134. A method for selecting a course of treatment of a subject having or suspected of having a disease, comprising:

obtaining from the subject a biological sample,

fractionating the sample with the method of claim 1,

determining at least one cellular component in the sample that is associated with the disease, and

selecting a course of treatment appropriate to the disease of the subject.

135. A method for evaluating the effect of candidate pharmacological compounds on a disease cell phenotype comprising:

obtaining a sample of cultured tissue or cells,

fractionating the sample with the method of claim 1,

determining the amount of one or more specific cellular components in the sample,

contacting the cultured tissue or cells with a candidate pharmacological agent,

obtaining a second sample of the cultured tissue or cells,

fractionating the second sample with the method of claim 1,

determining a second amount of one or more specific cellular components in the sample, and comparing the first and second amounts of one or more specific cellular components of the tissue or cells, wherein a change in the second amount of one or more specific cellular components, relative to the first amount of one or more specific cellular components, indicates the candidate pharmacological compound alters the amount of one or more specific cellular components indicating the onset of, progression of, or regression of a disease cell phenotype.

84. A device for physically separating polypeptide constituents of a sample fluid, the device comprising:

(a) at least two spatially separated polymer matrix units, each polymer matrix unit preferentially accepting a different set of polypeptides on the basis of one or more physical and/or chemical properties;

(b) a sample fluid exposing device for exposing the sample fluid in a manner which permits access by the spatially separated polymer matrix units;

(c) a substrate for receiving sample aliquots from the polymer matrix units;

(d) a mechanical movement device for mechanically contacting the polymer matrix units with the sample fluid to preferentially load each polymer matrix unit with a fraction of the sample fluid, and to contact the loaded polymer matrix units with the substrate to deposit one or more fractionated aliquots on the substrate, wherein the mechanical movement device operates to achieve its purpose by mechanically moving any one or more of;

(i) the polymer matrix units;

(ii) the sample fluid exposing device; and

(iii) the substrate.

85. The device of claim 84 wherein the polymer matrix units are coated with oil (except for that part in contact with the sample fluid).

86. The device of claim 84 wherein the sample fluid exposing device comprises one or more chambers or wells, each holding a sample volume which is equal to or less than about 10 μ

l.

87. The device of claim 84 wherein the sample fluid exposing device comprises one or more chambers or wells, each holding a sample volume which is equal to or less than about 1 μ

l.

88. The device of claim 84 wherein the sample fluid exposing device comprises one or more chambers or wells, each holding a sample volume which is equal to or less than about 0.1 μ

l.

89. The device of claim 84 wherein each aliquot is equal to or less than 100 pl of sample fluid.

90. The device of claim 84 wherein each aliquot is equal to or less than 10 pl of sample fluid.

91. The device of claim 84 wherein each aliquot is equal to or less than about 1 pl of sample fluid.

92. The device of claim 84 wherein each polymer matrix unit has a size sufficient to permit the polymer matrix unit to deposit at least 100 100 pl sample aliquots.

93. The device of claim 84 wherein each polymer matrix unit has a size sufficient to permit the polymer matrix unit to deposit at least 100 10 pl sample aliquots.

94. The device of claim 84 wherein each polymer matrix unit has a size sufficient to permit the polymer matrix unit to deposit at least 100 1 pl sample aliquots.

95. The device of claim 84 further comprising a computer processor programmed to control movement of the mechanical movement device.

96. The device of claim 95 wherein the computer processor is programmed to maintain each polymer matrix unit in the sample fluid for a time which is less than 300 seconds.

97. The device of claim 95 wherein the computer processor is programmed to maintain each polymer matrix unit in the sample fluid for a time which is less than 30 seconds.

98. The device of claim 95 wherein the computer processor is programmed to maintain each polymer matrix unit in the sample fluid for a time which is less than 3 seconds.

99. The device of claim 84 wherein the one or more physical and/or chemical properties are selected from the group consisting of size, shape and charge.

100. The device of claim 84 wherein the polymer matrix units are initially pre-hydrated.

101. The device of claim 84 wherein the polymer matrix units are initially non-hydrated.

102. The device of claim 84 wherein the polymer matrix units comprise particles selected from the group consisting of cross-linked dextrans;

agaroses;

polystyrenes; and

polyacrylamides.

103. The device of claim 84 wherein the polymer matrix units are arranged in an array.

104. The device of claim 84 wherein the polymer matrix units comprise chromatography bead(s).

105. The device of claim 84 wherein the sample fluid exposing device comprises an orifice and a means for forcing sample fluid through the orifice to expose a bubble or droplet of sample fluid.

106. The device of claim 84 wherein the sample fluid exposing device comprises an orifice and a means for forcing sample fluid through the orifice to form an array of bubbles or droplets.

107. The device of claim 84 wherein the sample fluid exposing device comprises an array of orifices and a means for forcing sample fluid through each orifice to form a bubble or droplet.

108. The device of claim 84 wherein the sample fluid exposing device comprises an array of orifices and a means for forcing sample fluid through each orifice to form arrays of bubbles or droplets.

109. The device of claim 84 wherein the mechanical movement device comprises one or more robotic components.

110. The device of claim 84 further comprising a mechanism for coating each bubble or droplet, and polymer matrix unit, with oil before loading with the fraction of sample fluid.

111. The device of claim 84 wherein the substrate is coated with a support film.

112. The device of claim 111 wherein the support film comprises a formvar resin.

113. The device of claim 111 wherein the support film comprises a compound that preferentially absorbs ultraviolet laser light, thereby enhancing vaporization and ionization of polypeptides.

114. The device of claim 113 wherein the compound is 2,5-dihydroxybenzoic acid in ethanol, or an analogous compound or mixture serving the same purpose.

115. The device of claim 111 wherein the support film comprises an enzyme for partially digesting polypeptides in the sample aliquot.

116. The device of claim 115 wherein the enzyme is trypsin.

117. The device of claim 111 wherein the support film comprises an inhibitor to prevent degradation of sample polypeptide.

118. The device of claim 117 wherein the inhibitor is a protease inhibitor.

119. The device of claim 84 wherein the mechanical movement device deposits an array of aliquots on the substrate.

120. The device of claim 119 wherein the array comprises from about 10 to about 100 sample aliquots per square millimeter.

121. The device of claim 119 wherein sample aliquots deposited in an arrays-in-array format.

122. The device of claim 84 wherein the polymer matrix units comprise two or more sets of one or more particles, each set preferentially accepting a different set of polypeptides according to size and/or shape.

123. The device of claim 84 wherein the polymer matrix units comprise two or more sets of one or more particles, at least one set being uncharged.

124. The device of claim 84 wherein the polymer matrix units comprise two or more sets of one or more particles, at least one set comprising anion exchangers which bind or attract negatively charged biomolecules.

125. The device of claim 84 wherein the polymer matrix units comprise two or more sets of one or more particles, at least one set comprising cation exchangers which bind or attract positively charged biomolecules.

127. The substrate of claim 126 wherein each of the chromatographic bead particles has a shape selected from the group consisting of spherical, cylindrical, cubical, and ovoid.

128. The substrate of claim 126 wherein the chromatographic bead particles are integral components of the substrate.

129. The substrate of claim 126 wherein the polymer matrix units are mounted in array in, and extending through, a chromatography chip, such that the sample fluid can contact the polymer matrix units on a first side of the chromatography chip and the aliquots can be stamped out on an opposite side of the chromatography chip.

130. The substrate of claim 129, wherein:

(a) the chromatography chip has channels etched in the first side thereof, and the polymer matrix units contact the channels;

(b) the chromatography chip is capped, so that sample fluid can be flowed through the channels to bring the input fluid into contact with the polymer matrix units.

132. The method of claim 131, further comprising:

comparing the determination of the amount of specific cellular components in the sample and the amount of specific cellular components in a control group of cells as a diagnosis for a condition in the subject.

126. A substrate comprising a one-dimensional or two dimensional array of chromatographic bead particles, said particles being divided into sets of two or more beads, wherein each set of bead particles preferentially accepts a set of polypeptides based on one or more physical and/or chemical characteristics.