Noninvasive measurement and identification of biomarkers in disease state
The invention is methods and related kits for diagnosing a disease state of cachexia by measuring biomarker profiles from a biological sample. Rapid measurement of early onset or progression of the disease in a subject is determined by measuring biomarker levels from the subject and optionally comparing the biomarker levels to a standard biomarker profile or metabolome phase portrait for the disease. The biomarkers measured in the assay and related kit for cachexia progression include biomarkers selected from the group consisting of lactate, citrate, formate, acetoacetate, 3-hydroxy butrate, alanine, glutamine, glutamate, valine, isoleucine leucine, thrionine, lysine, arginine, tyrosine, phenyl alanine, histidine and tryptophan.
1. A method for providing information useful for diagnosing a disease state in a subject comprising:
a) obtaining a biological sample comprising a plurality of biomarkers from the subject, wherein the biomarker levels are related to the disease state, and the disease state is sepsis;
b) detecting the plurality of biomarkers;
c) determining a profile of the detected biomarkers; and
d) comparing the profile of the detected biomarkers to a standard biomarker profile, wherein the profile of the detected biomarkers comprise Ala, Tyr and His each having increased levels of at least 50% compared to the standard biomarker profile, thereby providing information useful for diagnosing sepsis.
2. The method of claim 1 , wherein the biological sample comprises blood or blood plasma.
3. The method of claim 1 , wherein the standard biomarker level is from an internal reference.
4. The method of claim 1 , wherein a sample metabolome portrait is determined from the biomarker profile and the information useful for diagnosing the disease state is obtained by fitting the sample metabolome portrait to a standard metabolome phase portrait.
5. The method of claim 1 further comprising:
a) repeating the steps of claim 1 on a second biological sample, wherein the second biological sample is obtained from the subject at a different time; and
b) comparing the biomarker profiles of the two biological samples to provide information useful for diagnosing the disease state.
6. The method of claim 1 wherein the biomarkers are detected by NMR, mass spectroscopy, ELISA, fluorescence labeling techniques, flow cytometry, chromatography, capillary electrophoresis or chemical sensor.
7. The method of claim 1 , wherein the disease state is associated with a viral infection or a bacterial infection.
8. The method of claim 1 , wherein the subject is a mammal and said mammal is selected from the group consisting of avian, bovine, swine, horse, sheep and human.
9. The method of claim 1 , wherein the plurality of biomarkers form a clique capable of providing information useful for diagnosing the disease state.