Prediction of Severity of Liver Disease by a 13C Octanoate Breath Test (OBT)

This study has been terminated.
(Budgetary Issues)
Exalenz Bioscience LTD.
Information provided by (Responsible Party):
Virginia Commonwealth University Identifier:
First received: November 17, 2010
Last updated: July 27, 2015
Last verified: July 2015
The purpose of the study is to demonstrate that the ¹³C-Octanoate Breath Test (OBT) can be used as an aid, in conjunction with other clinical information and medical history, for evaluating disease severity and detecting NASH with a high probability.

Condition Intervention Phase
Metabolic Syndrome
Nonalcoholic Fatty Liver Disease
Drug: Sodium Octanoate Breath Test
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: Prediction of Severity of Liver Disease in Patients With Suspected Nonalcoholic Fatty Liver Disease (NAFLD) by 13C Octanoate Breath Test (OBT)

Resource links provided by NLM:

Further study details as provided by Virginia Commonwealth University:

Primary Outcome Measures:
  • The Peak Value of the PDR (Percentage Dose Recovery of 13C) of OBT (Octanoate Breath Test) [ Time Frame: 1 hour ] [ Designated as safety issue: No ]
    To assess the ability of the OBT to assess disease severity in patients with suspected NAFLD (non alcoholic fatty liver disease) compared to NAS (Non-alcoholic-steatohepatitis (NASH) Activity Score) scoring system, where steatosis is scaled from 0-3, lobular inflammation is scaled from 0-3 and hepatocellular ballooning is scaled from 0-2. NAS score greater or equal to 5 indicates NASH. The higher the PDR peak, the better the liver health and function.PDR units are percent per hour of 13C dose recovery and describes rate of metabolism. The PDR peak is the highest rate of metabolism the liver reaches.The total range of NAS is 0-8.

Secondary Outcome Measures:
  • Histology -NAS Scoring of Liver Biopsy [ Time Frame: Up to 6 months ] [ Designated as safety issue: No ]

    OBT will be compared to histology (including NAS score as described above)and other parameters to develop severity score. Only subjects with biopsy from routine clinical practice will be enrolled.

    NAS (Non-alcoholic-steatohepatitis (NASH) Activity Score) scoring system includes the following components: steatosis, which is scaled from 0-3, lobular inflammation, which is scaled from 0-3 and hepatocellular ballooning, which is scaled from 0-2. NAS score greater or equal to 5 indicates NASH. The range of the NAS score is from 0-8.

Enrollment: 61
Study Start Date: February 2011
Study Completion Date: June 2012
Primary Completion Date: May 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Sodium Octanoate Breath Test
Only subjects with metabolic syndrome and suspected non alcoholic fatty liver disease will undergo breath test. They must not have any other liver disease.
Drug: Sodium Octanoate Breath Test
100 mg of 13-C labeled sodium octanoate (Octanoate for short) is to be dissolved in 1 cup of tap water and administered to subject after baseline breath collection is completed.
Other Name: Octanaote, sodium octanoate

Detailed Description:

The OBT was chosen to assess, along with other parameters, liver health in subjects suspected of NAFLD (non alcoholic fatty liver disease).

Octanoate is absorbed promptly from the intestinal lumen and transported rapidly to the liver through the portal venous system, enters the hepatic mitochondria independently of the carnitine transport system and undergoes hepatic mitochondrial beta-oxidation which produces acetyl coenzyme A (CoA). Finally, acetyl CoA enters the Krebs cycle and is oxidized by carbon dioxide (CO2). This is a non invasive test that can be performed routinely at every visit to assess disease severity. The subject is connected to a breath analyzer via a nasal cannula for approximately 1 hour, that measures baseline breath and changes in delta over baseline due to metabolization of Octanoate.


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Adult men or women (>18 years of age)
  • • Liver -biopsy ( at least 1.7 cm and 4 portal tracts) performed within 6 months of breath test or planned within the next 6 weeks, providing no treatment for liver disease was given between the biopsy and the OBT Any elevation of liver enzymes above the upper limit of normal (any or all of the following: AST,ALT, GGT, Alkaline phosphatase)
  • At least one of the features of the metabolic syndrome

    • waist circumference > 100 cm for men, 88 cm for women
    • triglycerides > 150 mg/dl
    • fasting blood sugar > 110 mg/dl
    • HDL cholesterol < 40 mg/dl
    • blood pressure > 130/85 mm Hg
  • No other known co-existent liver disease, excluded by appropriate serologic testing

Exclusion Criteria:

  • Positive studies for any of the following:
  • hepatitis C (PCR)
  • hepatitis B (surface antigen or DNA)
  • iron saturation > 60% + gene test for hereditary hemochromatosis
  • antinuclear antibody at a titer > 1: 160 along with hypergammaglobulinemia and ALT levels>250 U/L

    • Patient has Alpha-1-antitrypsin level below lower limit of normal (< 150 mg/dl)
    • Patient has alcohol consumption > 20 gm/day for women and > 30 gm/day for men
    • Patient is pregnant
    • Patient has been taking known hepatotoxic drugs e.g. (e.g.acebutolol, indomethacin,phenylbutazone,allopurinol,isoniazid,phenytoin,atenolol,ketoconazole,piroxicam,carbamazepine,labetalol,probenecid,cimetidine,maprotiline,pyrazinamide,dantrolene, metoprolol,quinidine,diclofenac, mianserin)• Patients that have had more than 10% reduction in body weight since biopsy
    • Patient with known severe congestive heart failure (LVEF on echocardiogram < 20%)
    • Patient with known severe pulmonary hypertension (By echocardiogram, PAS >45 mmHg)
    • Patient with uncontrolled diabetes mellitus (HA1c>10)
    • Patient with previous surgical bypass surgery
    • Patient with extensive short bowel syndrome(>100 cm)
    • Patient currently receiving total parenteral nutrition
    • Patient is a recipients of any organ transplant
    • Patients that received any anti-viral treatment or any other liver therapy between the time of the biopsy and the breath test.
    • Women who are pregnant
    • Patients with an acute current exacerbation of chronic obstructive pulmonary disease or bronchial asthma.
    • Patient has taken drugs that can interfere with octanoate metabolism or can also cause NAFLD independent of the metabolic syndrome, including: corticosteroids, amiodarone, tetracycline, valproic acid, methotrexate, stavudine, zidovudine.
    • Patients unable or refuse to sign informed consent
    • Patients that based on the opinion of the investigator should not be enrolled into this study
    • Patients that are participating in other clinical trials evaluating experimental treatments or procedures
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Please refer to this study by its identifier: NCT01244503

United States, Texas
Baylor College of Medicine
Houston, Texas, United States, 77030
United States, Virginia
Virginia Commonwealth University
Richmond, Virginia, United States, 23298
Sponsors and Collaborators
Virginia Commonwealth University
Exalenz Bioscience LTD.
Principal Investigator: Arun J. Sanyal, M.D. Virginia Commonwealth University
  More Information

No publications provided

Responsible Party: Virginia Commonwealth University Identifier: NCT01244503     History of Changes
Other Study ID Numbers: NASH-BID-FIS-808
Study First Received: November 17, 2010
Results First Received: August 7, 2014
Last Updated: July 27, 2015
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Fatty Liver
Liver Diseases
Metabolic Syndrome X
Digestive System Diseases
Glucose Metabolism Disorders
Insulin Resistance
Metabolic Diseases processed this record on December 01, 2015