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Angiotensin II Blockade and Inflammation in Obesity

NCT01684748 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2018-01-03

Study results available
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Summary

Overweight and obesity, which afflicts \~65% of the U.S. population and more than 1 billion people worldwide, increases the risk of developing hypertension. Activation of the renin angiotensin system (RAS) is an important mechanism by which obesity leads to hypertension. In addition to its vasoconstricting and sodium retaining actions, angiotensin II also has potent pro-inflammatory actions including macrophage infiltration and expression of proinflammatory cytokines in target tissues. Adipose tissue and skeletal muscle appear to be a key sites for the generation of proinflammatory cytokines. Although angiotensin II receptor blockade reduces inflammation in many tissues, the effects on adipose tissue and skeletal muscle in humans are not clear. Importantly, the chronic low grade inflammatory state that accompanies obesity complicates hypertension by contributing to insulin resistance and accelerating cardiovascular disease. Therefore, the general aim of the present proposal will be to determine the influence of angiotensin II receptor blockade on adipose tissue and skeletal muscle inflammation and its relation to improvements in insulin sensitivity, if observed, in obese hypertensive humans. To address these aims, 44 obese (BMI\>30 kg/m2) hypertensive (BP\>140 systolic and/or 90 diastolic) individuals (age=50-65 years) will be randomized to receive 8 weeks of either the angiotensin II receptor antagonist, olmesartan medoxomil, or no treatment in a crossover manner. Subcutaneous adipose tissue and skeletal muscle biopsies will be obtained and insulin sensitivity (intravenous glucose tolerance tests) will be assessed at baseline and following 8 weeks of each intervention. A two week washout period will separate the interventions.

Conditions

Interventions

DRUG

Olmesartan medoxomil

Crossover intervention comparing antihypertensive medication to no drug intervention.

Sponsors & Collaborators

  • National Heart, Lung, and Blood Institute (NHLBI)

    collaborator NIH

  • Virginia Polytechnic Institute and State University

    lead OTHER

Principal Investigators

  • Kevin P. Davy, Ph.D. · Virginia Polytechnic Institute and State University

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2009-02-28
Primary Completion
2011-08-31
Completion
2011-08-31

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01684748 on ClinicalTrials.gov