Vascular Function, Endothelin, and Inflammation in Pre-diabetic Obesity Versus Lean Healthy Controls

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Indiana University
ClinicalTrials.gov Identifier:
NCT00837590
First received: February 4, 2009
Last updated: May 21, 2012
Last verified: April 2012
  Purpose

We intend to pursue the following Aims:

  1. Does inflammation contribute importantly to concurrent defects in vascular and metabolic dysfunction in human pre-diabetic obesity?
  2. Are there benefits of anti-inflammatory treatment strategies in pre-diabetic obesity in the context of existing treatment with metformin?
  3. Are there benefits of anti-inflammatory treatment strategies in pre-diabetic obesity in the context of existing treatment with lisinopril?

The intent of the current project is to efficiently and at low cost generate preliminary data along each of these lines of questioning, studying the minimum number of subjects required to assess the viability of the question using the current measurement approaches.


Condition Intervention
Pre-diabetes
Obesity
Drug: salsalate
Drug: metformin
Drug: lisinopril

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Vascular Function, Endothelin, and Inflammation in Pre-diabetic Obesity Versus Lean Healthy Controls

Resource links provided by NLM:


Further study details as provided by Indiana University:

Primary Outcome Measures:
  • The primary endpoints of interest are basal flow and diameter, flow-mediated vasodilation, insulin-stimulated glucose disposal and insulin-mediated vasodilation measured by brachial artery ultrasound [ Time Frame: End of study ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Other endpoints of interest include circulating levels of endothelin and nitric oxide, levels of inflammatory markers, circulating endothelial progenitor cell numbers, and steady-state glucose disposal rate for the insulin infusion study. [ Time Frame: End of study ] [ Designated as safety issue: No ]

Enrollment: 14
Study Start Date: March 2009
Study Completion Date: August 2010
Primary Completion Date: June 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
Nondiabetic lean and obese subjects will be studied in this arm. Subjects will be studied at baseline and after 2 months of treatment with salsalate.
Drug: salsalate
Subjects will receive 2 months of treatment with 4 gram/day of oral salsalate divided into 3 doses.
Experimental: Metformin
Obese subjects will be pre-treated with metformin 1000mg bid for 4 weeks prior to baseline measurements and will continue metformin in addition to salsalate for an additional 2 months.
Drug: salsalate
Subjects will receive 2 months of treatment with 4 gram/day of oral salsalate divided into 3 doses.
Drug: metformin
metformin po 1000mg bid
Experimental: Lisinopril
Obese subjects will be pre-treated with lisinopril 20mg qd for 4 weeks prior to baseline measurements and continue lisinopril in addition to salsalate for an additional 2 months.
Drug: salsalate
Subjects will receive 2 months of treatment with 4 gram/day of oral salsalate divided into 3 doses.
Drug: lisinopril
lisinopril po 20mg qd

  Eligibility

Ages Eligible for Study:   18 Years to 55 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • healthy
  • normotensive (BP<140/95 mmHg)
  • lean and obese
  • 18 and 55 years
  • women must be premenopausal

Exclusion Criteria:

  • use of pharmacologic agents or recreational drugs, with the exception of occasional use of non-narcotic pain medications
  • blood pressure (>140/90 mmHg)
  • elevated cholesterol (LDL >130 mg/dL)
  • diabetes mellitus (by ADA criteria)
  • evidence of coronary and/or peripheral vascular disease by history and physical exam
  • >5 kg change in weight in the preceding 3 months
  • chronic systemic illness with recognized metabolic effects
  • hepatitis C and HIV
  • recognized systemic inflammatory or autoimmune processes such as rheumatoid arthritis or systemic lupus erythematosis
  • Raynaud's phenomenon or other abnormalities of hand or finger perfusion
  • regular participation in endurance or high-performance athletic activity
  • history of aspirin or salsalate sensitivity including aspirin-induced asthma
  • prior treatment with salsalate, pentoxyfilline, or monoclonal anti-TNFalpha antibodies
  • pregnancy
  • liver transaminase levels >3 times the upper limit of normal
  • creatinine >1.5 mg/dL
  • history of a cellular immunodeficiency-related opportunistic infections, such as an endemic mycosis (eg. histoplasmosis) or mycobacterial infection (eg tuberculosis)
  • reactive tuberculin skin test
  • history of malignancy except for basal cell carcinoma of the skin
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00837590

Locations
United States, Indiana
Indiana Clinical Research Center
Indianapolis, Indiana, United States, 46202
Sponsors and Collaborators
Indiana University
Investigators
Principal Investigator: Kieren J Mather, MD Indiana University
  More Information

No publications provided

Responsible Party: Indiana University
ClinicalTrials.gov Identifier: NCT00837590     History of Changes
Other Study ID Numbers: IU-IRB-0901-03
Study First Received: February 4, 2009
Last Updated: May 21, 2012
Health Authority: United States: Food and Drug Administration

Keywords provided by Indiana University:
Vascular function
Glucose tolerance
Obesity
Pre-diabetes

Additional relevant MeSH terms:
Inflammation
Obesity
Glucose Intolerance
Prediabetic State
Pathologic Processes
Overnutrition
Nutrition Disorders
Overweight
Body Weight
Signs and Symptoms
Hyperglycemia
Glucose Metabolism Disorders
Metabolic Diseases
Diabetes Mellitus
Endocrine System Diseases
Metformin
Lisinopril
Sodium Salicylate
Salicylsalicylic acid
Hypoglycemic Agents
Physiological Effects of Drugs
Pharmacologic Actions
Angiotensin-Converting Enzyme Inhibitors
Protease Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Antihypertensive Agents
Cardiovascular Agents
Therapeutic Uses
Cardiotonic Agents

ClinicalTrials.gov processed this record on September 16, 2014