Diagnosis of sepsis or SIRS using biomarker profiles
First Claim
1. A method of determining the status of sepsis in an individual, comprising:
- (a) obtaining a first biomarker profile from a first biological sample taken from the individual; and
(b) comparing the individual'"'"'s first biomarker profile to a reference biomarker profile obtained from a reference population;
wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison determines the status of sepsis in the individual.
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Abstract
The early prediction or diagnosis of sepsis advantageously allows for clinical intervention before the disease rapidly progresses beyond initial stages to the more severe stages, such as severe sepsis or septic shock, which are associated with high mortality. Early prediction or diagnosis is accomplished by comparing an individual'"'"'s profile of biomarker expression to profiles obtained from one or more control, or reference, populations, which may include a population that develops sepsis. Recognition of features in the individual'"'"'s biomarker profile that are characteristic of the onset of sepsis allows a clinician to diagnose the onset of sepsis from a bodily fluid isolated from the individual at a single point in time. The necessity of monitoring the patient over a period of time is, therefore, avoided, advantageously allowing clinical intervention before the onset of serious symptoms of sepsis. Further, because the biomarker expression is assayed for its profile, identification of the particular biomarkers is unnecessary. The comparison of an individual'"'"'s biomarker profile to biomarker profiles of appropriate reference populations likewise can be used to diagnose SIRS in the individual.
116 Citations
91 Claims
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1. A method of determining the status of sepsis in an individual, comprising:
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(a) obtaining a first biomarker profile from a first biological sample taken from the individual; and
(b) comparing the individual'"'"'s first biomarker profile to a reference biomarker profile obtained from a reference population;
wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison determines the status of sepsis in the individual. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 91)
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2. A method of determining the status of sepsis in an individual, comprising:
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(a) obtaining a first biomarker profile at a single point in time from the individual; and
(b) comparing the individual'"'"'s first biomarker profile to a reference biomarker profile;
wherein the comparison of the biomarker profiles determines the status of sepsis in the individual with an accuracy of at least about 60%. - View Dependent Claims (9)
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- 3. A method of determining the status of sepsis in an individual, comprising comparing (i) a first biomarker profile generated from a first biological sample taken from the individual at a single point in time with (ii) a reference biomarker profile generated from a reference population, wherein the comparison comprises applying a decision rule that determines the status of sepsis in the individual.
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4. A method of determining the status of sepsis in an individual, comprising:
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(a) obtaining a first biomarker profile from a first biological sample taken from the individual; and
(b) comparing the individual'"'"'s first biomarker profile to a reference biomarker profile obtained from biological samples from a reference population, wherein the reference population is selected from the group consisting of a normal reference population, a SIRS-positive reference population, an infected/SIRS-negative reference population, a sepsis-positive reference population, a reference population at a stage in the progression of sepsis, a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 0-36 hours, a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 36-60 hours, and a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 60-84 hours, and wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison determines the status of sepsis in the individual.
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5. A method of determining the status of sepsis in an individual, comprising comparing a measurable characteristic of at least one biomarker between (i) a first biomarker profile obtained from a first biological sample from the individual and (ii) a biomarker profile obtained from biological samples from a reference population, wherein the comparison classifies the individual as belonging or not belonging to the reference population, and wherein the comparison determines the status of sepsis in the individual.
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6. A method of determining the status of sepsis in an individual, comprising:
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(a) selecting at least two features from a set of biomarkers in a first biomarker profile generated from a first biological sample of an individual; and
(b) comparing the features to a set of the same biomarkers in a reference biomarker profile generated from biological samples from a reference population, wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population with an accuracy of at least about 60%, and wherein the comparison determines the status of sepsis in the individual.
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7. A method of determining the status of sepsis in an individual, comprising:
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(a) determining an abundance or changes in an abundance of at least two biomarkers in a first biomarker profile obtained from a first biological sample from the individual, and (b) comparing the abundance or the changes in the abundance of the at least two biomarkers in the individual'"'"'s first biomarker profile to an abundance or changes in an abundance of these biomarkers in a reference biomarker profile obtained from biological samples from a reference population, wherein the comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison determines the status of sepsis in the individual.
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8. A method of determining the status of sepsis in an individual, comprising determining an abundance or a change in an abundance of at least one biomarker of a first biomarker profile obtained from a first biological sample from the individual as compared to an abundance or change in an abundance of the at least one biomarker of a reference biomarker profile obtained from biological samples from a (i) SIRS-positive reference population that contracted sepsis and (ii) a SIRS-positive reference population that did not, wherein the biomarkers are selected from the group consisting of the biomarkers listed in any one of TABLES 15-23 and 26-50.
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75. A method of predicting the onset of sepsis in an individual, comprising:
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(a) measuring an aspect of at least two features in a biomarker profile, wherein the biomarker profile comprises at least two biomarkers selected from the set of biomarkers set forth in any one of TABLES 15-23 and 26-50; and
(b) comparing the measured aspect of said at least two features with the value of a corresponding aspect of the same at least two features in a reference population, wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison predicts the onset of sepsis in the individual. - View Dependent Claims (76, 77, 78)
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79. A method of diagnosing SIRS in an individual, comprising:
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(a) obtaining a first biomarker profile from a first biological sample taken from the individual; and
(b) comparing the individual'"'"'s first biomarker profile to a reference biomarker profile obtained from a reference population, wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison diagnoses SIRS in the individual.
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80. A method of diagnosing SIRS in an individual, comprising:
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(a) obtaining a biomarker profile at a single point in time from the individual; and
(b) comparing the individual'"'"'s biomarker profile to a reference biomarker profile, wherein the comparison of the biomarker profiles can diagnose SIRS in the individual with an accuracy of at least about 60%.
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81. A method of diagnosing SIRS in an individual, comprising comparing (i) a first biomarker profile generated from a first biological sample taken from the individual at a single point in time with (ii) a reference biomarker profile generated from a reference population, wherein the comparison comprises applying a decision rule that determines the status of SIRS in the individual.
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82. A method of diagnosing SIRS in an individual, comprising:
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(a) obtaining a first biomarker profile from a first biological sample taken from the individual; and
(b) comparing the individual'"'"'s first biomarker profile to a reference biomarker profile obtained from biological samples from a reference population, wherein the reference population is selected from the group consisting of a normal reference population, a SIRS-positive reference population, and an infected/SIRS-negative reference population, a sepsis-positive reference population, a reference population at a stage in the progression of sepsis, a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 0-36 hours, a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 36-60 hours, and a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 60-84 hours, and wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison diagnoses SIRS in the individual.
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83. A method of diagnosing SIRS in an individual, comprising comparing a measurable characteristic of at least one biomarker between (i) a first biomarker profile obtained from a first biological sample from the individual and (ii) a biomarker profile obtained from biological samples from a reference population, wherein the comparison classifies the individual as belonging or not belonging to the reference population, and wherein the comparison diagnoses SIRS in the individual.
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84. A method of diagnosing SIRS in an individual, comprising:
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(a) selecting at least two features from a set of biomarkers in a biomarker profile generated from a first biological sample of an individual; and
(b) comparing the features to a set of the same biomarkers in a biomarker profile generated from biological samples from a reference population, wherein a single such comparison is capable of classifying the individual as belonging to or not belonging to the reference population with an accuracy of at least about 60%, and wherein the comparison diagnoses SIRS in the individual.
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85. A method of diagnosing SIRS in an individual, comprising:
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(a) determining an abundance or change in an abundance of at least two biomarkers contained in a first biological sample of an individual, and (b) comparing the abundance or change in an abundance of the biomarkers in the individual'"'"'s sample to an abundance of these biomarkers in biological samples from a reference population, wherein the comparison is capable of classifying the individual as belonging to or not belonging to the reference population, and wherein the comparison diagnoses SIRS in the individual.
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86. A method of diagnosing SIRS in an individual, comprising determining the abundance or a change in abundance of at least one biomarker obtained from a biological sample from the individual as compared to an abundance or change in an abundance of the at least one biomarker obtained from biological samples from a normal reference population, wherein the biomarkers are selected from the group consisting of the biomarkers listed in any one of TABLES 15-23 and 26-50.
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87. A method of isolating a biomarker, wherein said biomarker can be used to generate a biomarker profile to diagnose or predict sepsis, said method comprising:
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(a) obtaining a reference biomarker profile, said reference biomarker profile obtained from a population of individuals;
(b) identifying a feature of said reference biomarker profile, wherein said feature is predictive or diagnostic of sepsis or one of the stages of sepsis;
(c) identifying a biomarker that corresponds with said feature; and
(d) isolating said biomarker.
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88. A biomarker profile comprising at least two features that contribute to the classification of an individual as belonging to a reference population with an accuracy of at least about 60%, based on a comparison with the reference population, wherein the reference population is selected from the group consisting of a normal reference population, a SIRS-positive reference population, an infected/SIRS-negative reference population, a sepsis-positive reference population, a reference population at a stage in the progression of sepsis, a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 0-36 hours, a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 36-60 hours, and a SIRS-positive reference population confirmed as having sepsis by conventional techniques after about 60-84 hours.
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89. A kit, comprising at least two biomarkers selected from the group consisting of the biomarkers listed in any one of TABLES 15-23 and 26-50.
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90. A kit, comprising a set of antibodies or functional fragments thereof that specifically bind at least two biomarkers selected from the group consisting of the biomarkers listed in any one of TABLES 15-23 and 26-50.
Specification