Implications for Treatment of the Metabolic Syndrome

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00666029
Recruitment Status : Completed
First Posted : April 24, 2008
Results First Posted : June 9, 2016
Last Update Posted : June 9, 2016
Information provided by (Responsible Party):
University Hospital Southampton NHS Foundation Trust

Brief Summary:
To characterize features of metabolic syndrome in volunteers. To undertake a randomised trial to determine whether treatment with a statin improves muscle microvascular blood flow.

Condition or disease Intervention/treatment Phase
Metabolic Syndrome Drug: atorvastatin Drug: placebo Phase 2

Detailed Description:

To characterise features of the metabolic syndrome, including body fat, insulin sensitivity, and liver fat together with muscle micorvascular blood flow.

To undertake a randomised controlled trial of atorvastatin 40 mg. o.d for 6 months to determine whether any of the above measures change with treatment.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 40 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Prevention
Official Title: Implications for Treatment of the Metabolic Syndrome
Study Start Date : February 2006
Actual Primary Completion Date : February 2008
Actual Study Completion Date : February 2008

Arm Intervention/treatment
Active Comparator: Atorvastatin
Active arm atorvastatin 40 mg. o.d.
Drug: atorvastatin
40 m.g. o.d. tablets for 6 months

Placebo Comparator: Placebo
Placebo arm dummy pill
Drug: placebo

Primary Outcome Measures :
  1. Muscle Microvascular Function [ Time Frame: 6 months ]
    Skeletal muscle microvascular function assessed (Filtrass plethysmographic system) using a passive inductive transducer (Compumedics.dwl, Singen, Germany) and a small pressure step venous congestion protocol. Fluid filtration rate (Jv mL min-1 100 mL-1), measured from the slope of limb volume change in response to each pressure step (10 mmHg steps to 60 mmHg around the thigh) over the last 2 minutes of its application, to allow for completion of vascular filling, and plotted against cuff pressure (Pcuff). The slope of this relationship, at pressures above those giving rise to net filtration, is a measure of Kf, microvascular filtration capacity, a function of exchange surface area and permeability. The CV for Kf measurement was 14.5%.

  2. Insulin Sensitivity Index [ Time Frame: 6 months ]
    Insulin sensitivity index was assessed during the final steady state 30 minutes of a high dose hyperinsulinaemic euglycaemic clamp (insulin infusion rate 1.5 mIU/kg/min). During this part of the clamp, insulin was infused at 1.5mIU/kg/min and the glucose concentration was maintained at 5 mmol/L using a dextrose infusion. The whole body insulin mediated glucose disposal rate (M value - mg/kg/min) was estimated from the total amount of glucose infused during the last 30 minutes of the clamp. The mean of four serum insulin concentrations was taken during this 30 minutes to determine the steady state insulin concentration (I value - milliunits/litre). M value/I value defined the insulin sensitivity index.

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Ages Eligible for Study:   18 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Body mass index (BMI) 20-35 kg/m^2" and "> 3 criteria for the metabolic syndrome , one of which will be hypertriglyceridaemia, i.e. fasting plasma triglycerides >2.0 mmol/L - a cardinal lipid abnormality of the syndrome

NCEP III ATP metabolic syndrome criteria are:

Waist greater than or equal to 102 cm BP greater than 130 / 85 TG greater than or equal to 1.7mmol/l Glucose greater than or equal to 6.1 mmol/l HDL less than 1.0 mmol/l

Exclusion Criteria:

  • Aged <18 years
  • >75 years

Publications of Results:
Responsible Party: University Hospital Southampton NHS Foundation Trust Identifier: NCT00666029     History of Changes
Other Study ID Numbers: 4-2-65 (Version 4. 2007-07-03)
05/Q1704/38 ( Other Identifier: Research Ethics Committee )
RHM MED 0572 ( Other Identifier: Southampton University Hospitals Trust R&D )
2005-000512-28 ( EudraCT Number )
First Posted: April 24, 2008    Key Record Dates
Results First Posted: June 9, 2016
Last Update Posted: June 9, 2016
Last Verified: June 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by University Hospital Southampton NHS Foundation Trust:
metabolic syndrome
Volunteers recruited from the community

Additional relevant MeSH terms:
Metabolic Syndrome X
Pathologic Processes
Insulin Resistance
Glucose Metabolism Disorders
Metabolic Diseases
Atorvastatin Calcium
Anticholesteremic Agents
Hypolipidemic Agents
Molecular Mechanisms of Pharmacological Action
Lipid Regulating Agents
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Enzyme Inhibitors