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Biomarkers useful in liver fibrosis diagnosis

Inactive Publication Date: 2010-06-03
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]Accordingly, one aspect of this invention features a method for diagnosing liver fibrosis based on the expression level of one or more of the three biomarkers listed above, and optionally in combination with one or more additional serum biomarkers, such as glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), and alpha-fetoprotein (AFP).
[0007]The just-described diagnostic method includes at least four steps: (i) obtaining a blood sample from a human subject suspected of having liver fibrosis (e.g., a hepatitis B or C virus carrier, or a patient suffering from an alcohol-related liver disease or a metabolic liver disease), (ii) detecting in the blood sample the

Problems solved by technology

Liver fibrosis involves excessive accumulation of extracellular matrix proteins (e.g., collagen) on liver cells, resulting in scar tissues.
However, liver biopsy, an invasive procedure, is not an ideal diagnostic approach.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Diagnosing Liver Fibrosis in HCV-Positive Patients Based on Serum Levels of uPA, MMP9, β-2MG, and Other Fibrosis-Related Markers

Materials and Methods

(i) Patients

[0028]140 HCV-positive patients (determined by a serology test via an immunoassay ELISA or RIA) and 93 healthy volunteers were participated in this study. Both the patients and the healthy volunteers were randomly assigned to a training set (n=148) and to a testing set (n=85). All of them were subjected to routine laboratory tests, including examination of a liver panel (GOT / AST, GPT / ALT, total serum bilirubin, alkine phosphatase, and albumin), prothrombine time / international normalized ratio (INR), AFP, tests to exclude other causes of liver disease, liver ultrasound, upper endoscopy, and modified Skinner survey (for determining alcohol consumption habit).

(ii) Biopsy Analysis

[0029]Liver biopsies were obtained from the patients and their histological features were analyzed according to the METAVR scoring system. Briefly, the...

example 2

Diagnosing Liver Fibrosis in HBV-Positive Patients Based on Serum Levels of uPA, MMP9, and β-2MG

[0073]The single- and 3-marker models were also validated in 30 patients carrying HBV and 30 healthy subjects in this study. Table 26 below lists characteristics of this data set.

TABLE 26Patient CharacteristicsData set (n = 60)Age, mean(SD)44.23(9.27)Female, n (%)17(28%)Serum Biochemical Makers, mean (SD)GOT / AST, IU / L54.53(59.56)GPT / ALT, IU / L87.02(129.47)T. Bilirubin, μmol / L21.52(21.78Albumin, g / L42.3(5.88)AFP, ng / ml8.73(26.62)Novel Serum Markers, mean (SD)uPA, ng / ml0.73(0.6)MMP9, μg / ml0.27(0.22)β-2MG, μg / ml1.44(1.16)

As shown in Table 27 below, the serum level of each of uPA, MMP9, and β-2MG correlates with fibrosis severity:

TABLE 27Serum Levels of uPA, MMP9, and β-2MG in HBV-Positive PatientsuPA (ng / ml)MMP9 (μg / ml)β-2MG (μg / ml)Healthy (n = 30)0.46 (0.18) 0.4 (0.23) 1.1 (0.18)F1 (n = 9)0.87 (0.53)0.18 (0.04)1.17 (0.4) F2 (n = 3)0.42 (0.1) 0.08 (0.01)1.13 (0.26)F3 (n = 7)0.77 (0.35)0.13 (0...

example 3

Diagnosing Liver Fibrosis in Patients Having Alcohol-Related Liver Disease Based on Serum Levels of uPA, MMP9, and β-2MG

[0075]53 patients having alcohol-related liver diseases were participated and 30 healthy subjects in this study. The patient characteristics are listed in Table 31 below. These patients were subjected to routine laboratory tests as described in Example 1 above and also modified Skinner survey to determine their alcohol consumption habit.

TABLE 31Patient CharacteristicsData set (n = 83)Age, mean (SD)43.83(9.23)Female, n (%)15(18%)Serum Biochemical Makers, mean (SD)GOT / AST, IU / L67.88(71.87)GPT / ALT, IU / L46.28(57.22)T. Bilirubin, μmol / L53.31(50.8)Albumin, g / L35.02(7.15)AFP, ng / ml103.81(892.5)Novel Serum Markers, mean (SD)uPA, ng / ml1.11(1.07)MMP9, μg / ml0.3(0.24)β-2MG, μg / ml1.77(1.11)

[0076]Serum levels of uPA, MMP9, and β-2MG in these patients were examined following the ELISA assays described in Example 1. The results thus obtained are shown below Table 32.

TABLE 32Serum ...

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Abstract

Identification of urokinase-type plasminogen, matrix metalloproteinase 9, and β-2-microglobulin as novel biomarkers associated with liver fibrosis and uses thereof in diagnosing liver fibrosis.

Description

RELATED APPLICATION[0001]This application claims priority to U.S. Provisional Application No. 61 / 119,077, filed on Dec. 2, 2008, the content of which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]Liver fibrosis involves excessive accumulation of extracellular matrix proteins (e.g., collagen) on liver cells, resulting in scar tissues. It occurs in most chronic liver diseases, such as metabolic liver diseases and those associated with hepatitis B or C infection and alcohol consumption. Advanced liver fibrosis leads to cirrhosis, liver cancer, liver failure, and portal hypertension.[0003]Currently, liver biopsy is an optimal approach for detecting liver fibrosis and determining its severity. However, liver biopsy, an invasive procedure, is not an ideal diagnostic approach.[0004]Non-invasive serology assays, based on fibrosis-associated serum biomarkers, have been developed for diagnosing liver fibrosis. The accuracy and sensitivity of such assays ...

Claims

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Application Information

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IPC IPC(8): G01N33/573C12Q1/52C12Q1/37
CPCG01N33/6893G01N2333/70539G01N2800/085G01N2333/9723G01N2333/96494G01N33/487G01N33/49G01N33/50G01N33/5067G01N33/53G01N33/576
Inventor TSENG, TZU-LINGLI, HUNG-YILI, YEN-PENGLEE, ANGELINA HUAI-LOLIU, YI-CHENCHENG, PING-FULIN, WEI-YAYEH, HONG-ZEN
Owner IND TECH RES INST
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