Effect of Saxagliptin Treatment on Myocardial Fat Content, and Monocyte Inflammation

The recruitment status of this study is unknown because the information has not been verified recently.
Verified March 2012 by Baylor College of Medicine.
Recruitment status was  Recruiting
Sponsor:
Information provided by (Responsible Party):
Mandeep Bajaj, Baylor College of Medicine
ClinicalTrials.gov Identifier:
NCT01548651
First received: February 6, 2012
Last updated: March 8, 2012
Last verified: March 2012
  Purpose

The purpose of the study is to examine the effect of saxagliptin, an anti-diabetes medication, on hepatic and myocardial fat content and monocyte inflammation in patients with Impaired Glucose Tolerance (IGT).


Condition Intervention Phase
Impaired Glucose Tolerance
Drug: Saxagliptin
Drug: Placebo
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Effect of Saxagliptin Treatment on Myocardial Fat Content, Left Ventricular Function, and Monocyte Inflammation in Patients With Impaired Glucose Tolerance

Resource links provided by NLM:


Further study details as provided by Baylor College of Medicine:

Primary Outcome Measures:
  • Myocardial and Hepatic fat content (percentage) [ Time Frame: 6 months ] [ Designated as safety issue: No ]
    The percentage change in hepatic fat (%) and myocardial fat (%) from baseline as measured by magnetic resonance imaging and spectroscopy (MRS).


Secondary Outcome Measures:
  • left ventricular ejection fraction (LVEF)(%). [ Time Frame: 6 months ] [ Designated as safety issue: No ]
    The change in Left ventricular function measured as the percentage change in left ventricular ejection fraction (LVEF)(%) from baseline as measured by by magnetic resonance imaging.

  • monocyte inflammatory protein NFkappaB(%) [ Time Frame: 6 months ] [ Designated as safety issue: No ]
    The percentage change in monocyte inflammatory proteins NFkappaB (%) from baseline.


Estimated Enrollment: 40
Study Start Date: February 2012
Estimated Study Completion Date: August 2013
Estimated Primary Completion Date: August 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Placebo Drug: Placebo
Subjects will be randomized to receive either Saxagliptin 5mg daily orally or placebo for 6 months. Prior to randomization, all subjects will receive baseline measurements of fasting plasma glucose, free fatty acids, plasma adipocytokines, plasma levels of inflammatory markers and CRP, ICAM, VCAM, plasma lipids, and glucose tolerance (75 gram oral glucose tolerance test) as well as measurement of liver and myocardial fat content and left ventricular systolic and diastolic function with magnetic resonance imaging/spectroscopy. All subjects will also undergo measurements of monocyte inflammatory proteins at baseline. All subjects will undergo repeat measurements of fasting plasma glucose, Free Fatty Acids, inflammatory markers and adipocytokines, oral glucose tolerance test, monocyte inflammation, as well as hepatic/myocardial fat content determination and left ventricular function at the end of the 6 month treatment period.
Experimental: Saxagliptin
Saxagliptin 5 mg orally daily for 6 months
Drug: Saxagliptin
Subjects will be randomized to receive either Saxagliptin 5mg daily orally or placebo for 6 months. All subjects will receive baseline measurements of fasting plasma glucose, free fatty acids, plasma adipocytokines, plasma levels of inflammatory markers and C Reactive Protein (CRP), Intracellular Adhesion Molecule (ICAM), vascular cell adhesion molecule (VCAM), plasma lipids, and glucose tolerance (75 gram oral glucose tolerance test) as well as measurement of liver and myocardial fat content and left ventricular systolic and diastolic function with magnetic resonance imaging/spectroscopy. All subjects will also undergo measurements of monocyte inflammatory proteins at baseline. All subjects will undergo repeat measurements of fasting plasma glucose, Free Fatty Acids, inflammatory markers and adipocytokines, oral glucose tolerance test, monocyte inflammation, as well as hepatic/myocardial fat content determination and left ventricular function at the end of the 6 months.
Other Name: Onglyza

Detailed Description:

Obese, insulin resistant individuals have an excess of fat in the liver which is not attributable to alcohol or other known causes of liver disease, a condition defined as nonalcoholic fatty liver disease (NAFLD). The fatty liver is insulin resistant. Individuals with a fatty liver are more likely to have excess intra-abdominal fat as well as a reduction in circulating plasma adiponectin levels. A new class of antidiabetes medications known as dipeptidyl peptidase 4 (DPP-4) inhibitors (sitagliptin, saxagliptin) which enhance the circulating half life of Glucagon-like peptide-1 (GLP-1), an incretin hormone that enhances insulin secretion/ lowers glucose levels, have been approved to treat type 2 diabetes. More recently, it has been shown that these dipeptidyl peptidase 4 inhibitors can also decrease liver fat and inflammation in animal models of obesity by increasing circulating levels of GLP-1. It has been shown that GLP-1 enhances liver fat oxidation, reduces liver fat synthesis, and increases adiponectin levels in animal models in vivo.

Recent reports suggest that NAFLD is associated with an increased risk of cardiovascular disease independent of associated cardiovascular risk factors. Furthermore type 2 diabetics and subjects with impaired glucose tolerance are characterized by an increase in both hepatic and myocardial fat and left ventricular (LV) dysfunction, particularly diastolic dysfunction. Myocardial steatosis is an independent predictor of diastolic dysfunction in type 2 diabetes mellitus as well as impaired glucose tolerance. However, the effect of saxagliptin therapy on liver and myocardial fat content, as well as LV systolic and diastolic function in patients with impaired glucose tolerance (IGT) or type 2 diabetes has not been previously studied. Recently, it has been demonstrated that myocardial triglyceride content is increased in type 2 diabetic patients and is associated with impaired left ventricular diastolic function, independently of age, body mass index (BMI), heart rate, visceral fat, and diastolic blood pressure. More recently, it has been shown that that obese normal glucose tolerant subjects, obese subjects with IGT, and type 2 diabetic subjects have increased myocardial fat compared to lean subjects. Thus, both IGT and type 2 diabetic subjects have increased myocardial steatosis and defects in LV function. GLP-1 has been shown to improve myocardial function and cardiac output in conscious chronically instrumented canine models of cardiac injury or heart failure. GLP-1 increased cardiac output and reduced left ventricular end diastolic pressure in association with reduced systemic vascular resistance, and it improved myocardial insulin sensitivity and myocardial glucose uptake in dogs with rapid pacing-induced dilated cardiomyopathy. However, no previous study has examined the effect of saxagliptin on myocardial fat or LV function in IGT or type 2 diabetic patients. Finally, the effect of saxagliptin on vascular inflammation and monocyte Nuclear Factor-KappaB (NFkappaB) remains to be studied. Patients with Impaired Glucose Tolerance (IGT)/ Impaired Fasting Glucose (IFG) have insulin resistance as a well established defect. Furthermore, as stated previously, both myocardial and hepatic steatosis as well as defects in LV function are well characterized in obese, insulin resistant patients with IGT. However, the effect of DPP IV inhibitors on hepatic and myocardial steatosis and monocyte inflammation in insulin resistant patients with IGT have not been previously studied.

  Eligibility

Ages Eligible for Study:   30 Years to 70 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Men and women with a diagnosis diagnosis of Impaired Glucose Tolerance i.e. fasting plasma glucose less than or equal to 125 mg/dl, 2 hour post 75 gram oral glucose tolerance test (OGTT) plasma glucose between 140-199 mg/dl, glycosylated hemoglobin A1c (HbA1c) less than 6.5% as per American Diabetes Association (ADA) criteria.
  • Women of childbearing potential (WOCBP) and men must be using an acceptable method of contraception to avoid pregnancy throughout the study in such a manner that the risk of pregnancy is minimized.

Exclusion Criteria:

  • Patients must not be on anti-diabetes therapy for treatment of Impaired Glucose Tolerance (IGT) and must have a fasting plasma glucose concentration less or equal to 125 mg/dl.
  • Type 1 or Type 2 diabetes mellitus (fasting plasma glucose greater than 125 mg/dl).
  • Patients must not be on or have received metformin, thiazolidinediones, sulfonylureas, DPP IV inhibitor, or exenatide/liraglutide treatment for treatment of IGT at any time. Patients must not be receiving any of the following medications: thiazide or furosemide diuretics, beta-blockers, or other chronic medications such as hormone replacement therapy with known adverse effects on glucose tolerance levels. Patients taking systemic glucocorticoids will also be excluded.
  • Subjects with a history of clinically significant heart disease, peripheral vascular disease, or pulmonary disease.
  • Subjects must have a Body Mass Index between 30-35 kg/m2 and stable body weight.
  • Subjects must not have clinically significant liver disease (aspartate aminotransferase (AST) < 2.5 times upper limit of normal, Alanine transaminase (ALT) < 2.5 times upper limit of normal, Alkaline phosphatase< 2.5 times upper limit of normal), kidney disease (Serum creatinine < 1.5 mg/dl in men and 1.4 mg/dl in women) or significant anemia (Hematocrit < 34 vol%).
  • Subjects with a history of any serious hypersensitivity reaction to saxagliptin or a dipeptidyl peptidase 4 (DPP-IV) inhibitor.
  • Concomitant treatment with systemic cytochrome P450 3A4 inducers.
  • Women who are pregnant or breastfeeding
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT01548651

Contacts
Contact: Mandeep Bajaj, MD 713-798-1712 bajaj@bcm.edu

Locations
United States, Texas
Baylor College of Medicine Recruiting
Houston, Texas, United States, 77030
Principal Investigator: Mandeep Bajaj, MD         
Sponsors and Collaborators
Baylor College of Medicine
Investigators
Principal Investigator: Mandeep Bajaj, MD Baylor College of Medicine
  More Information

No publications provided

Responsible Party: Mandeep Bajaj, Professor of Medicine, Baylor College of Medicine
ClinicalTrials.gov Identifier: NCT01548651     History of Changes
Other Study ID Numbers: H-29171
Study First Received: February 6, 2012
Last Updated: March 8, 2012
Health Authority: United States: Institutional Review Board

Additional relevant MeSH terms:
Inflammation
Glucose Intolerance
Pathologic Processes
Hyperglycemia
Glucose Metabolism Disorders
Metabolic Diseases
Saxagliptin
Dipeptidyl-Peptidase IV Inhibitors
Protease Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Hypoglycemic Agents
Physiological Effects of Drugs

ClinicalTrials.gov processed this record on April 16, 2014