Prediction of Severity of Liver Disease by a 13C Octanoate Breath Test (OBT)
Nonalcoholic Fatty Liver Disease
Drug: Sodium Octanoate Breath Test
|Study Design:||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)|
- The Peak Value of the PDR (Percentage Dose Recovery of 13C) of OBT (Octanoate Breath Test) [ Time Frame: 1 hour ]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.
- Histology -NAS Scoring of Liver Biopsy [ Time Frame: Up to 6 months ]
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.
|Study Start Date:||February 2011|
|Study Completion Date:||June 2012|
|Primary Completion Date:||May 2012 (Final data collection date for primary outcome measure)|
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
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.
Please refer to this study by its ClinicalTrials.gov 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|
|Principal Investigator:||Arun J. Sanyal, M.D.||Virginia Commonwealth University|