Iron Depletion Therapy for Type 2 DM and NAFLD

November 6, 2012 updated by: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Iron Depletion Therapy for Patients With Type 2 Diabetes Mellitus and Non-Alcoholic Fatty Liver Disease

The purpose of this study is to find out whether lowering the amount of iron in the body will result in less resistance to insulin and improved liver function in patients with type 2 diabetes mellitus and non-alcoholic fatty liver disease. This may result in better diabetes control and/or a decrease in the amount of liver fat.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Nonalcoholic fatty liver disease (NAFLD) is a common liver disease in the United States. NAFLD can lead to severe liver disease in some patients. Patients with NAFLD develop resistance to the normal action of insulin. Insulin is important for processing sugar and fat and increased resistance to insulin leads to fat in the liver. There is a correlation between the amount of iron in a person's body and the ability of insulin to work properly. Several small studies suggest that removal of iron may improve both diabetes and NAFLD by lowering insulin resistance.

The goal of this pilot study is to determine the effect of iron depletion on insulin sensitivity in patients with type 2 diabetes mellitus and non-alcoholic fatty liver disease. This study will be performed as an ancillary P&F study to the NASH CRN; all participants will be recruited from the NASH CRN Database Study. Secondary outcome measures will include the effect of iron depletion on hepatic necroinflammation, markers of oxidative stress and intrahepatic fat content. Insulin resistance will be directly measured using a two-step hyperinsulinemic euglycemic clamp procedure, before and after iron depletion by phlebotomy. Oral glucose tolerance tests will also be performed in order to evaluate the efficacy of using the indirect, but less cumbersome, HOMA model to derive values of insulin resistance in this patient cohort. This study will advance our understanding of the role of body iron stores in the pathophysiology of type 2 diabetes mellitus and non-alcoholic fatty liver disease. If iron depletion results in improved insulin sensitivity, reduced hepatic necroinflammation and/or intrahepatic fat content, a large scale, randomized, controlled trial of iron depletion in patients with type 2 diabetes mellitus and non-alcoholic fatty liver disease will be planned.

Study Type

Interventional

Enrollment (Anticipated)

15

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Washington
      • Seattle, Washington, United States, 98195
        • University of Washington Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria

  • Histological evidence of NAFLD and enrollment in NASH CRN Database Study
  • Type 2 DM treated with diet or a stable dose of non-insulin sensitizing oral hypoglycemic agents for > 3 mo.
  • Hemoglobin HbA1c level ≤ 8 %
  • Serum ALT levels ≥1.3 x ULN
  • Between 18-65 years of age

Exclusion Criteria

  • Hereditary hemochromatosis or hepatic iron overload defined as any of the following:

    • 2+ iron on hepatic iron staining
    • Hepatic Iron Index ≥ 1.9
    • C282Y homozygous or C282Y/H63D compound heterozygous HFE genotype
  • Use of insulin or thiazolidinediones for the treatment of diabetes
  • Use of anti-NASH drugs (thiazolidinediones, vitamin E, UDCA, SAM-e, betaine, milk thistle, gemfibrozil, anti-TNF therapies, probiotics)
  • Serum ferritin <50μg/L
  • Serum transferrin-iron saturation <10 %
  • Hemoglobin <10 mg/L
  • Hematocrit <38 %
  • Voluntary blood donation or therapeutic phlebotomy within the previous twelve months (except routine lab tests)
  • Pregnant or lactating women
  • Prior history of coronary artery disease, myocardial infarction, exertional dyspnea or chronic chest pain at rest.
  • Evidence of myocardial infarction as determined by an ECG

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Improved insulin sensitivity as determined by:(1) hyperinsulinemic euglycemic clamp method
Time Frame: one year
one year
(2) HOMA model- determined by the OGTT method
Time Frame: one year
one year

Secondary Outcome Measures

Outcome Measure
Time Frame
Change in serum aminotransferase levels Change in levels of serum, plasma and urinary markers of oxidative stress
Time Frame: one year
one year
Changes in intrahepatic and intraabdominal fat content as determined by CT scan
Time Frame: one year
one year
Change in serum levels of proinflammatory cytokines (ie IL-6, TnF-αR2)
Time Frame: one year
one year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Investigators

  • Principal Investigator: Kris V Kowdley, MD, University of Washington

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2005

Primary Completion (Actual)

June 1, 2010

Study Completion (Actual)

June 1, 2010

Study Registration Dates

First Submitted

September 29, 2005

First Submitted That Met QC Criteria

September 29, 2005

First Posted (Estimate)

September 30, 2005

Study Record Updates

Last Update Posted (Estimate)

November 7, 2012

Last Update Submitted That Met QC Criteria

November 6, 2012

Last Verified

November 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DK 61728-S1 (completed)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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