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Orthogonal Polarisation Study in Young, Elderly and Type 2 Diabetics

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: NCT01476384
Recruitment Status : Completed
First Posted : November 22, 2011
Last Update Posted : April 11, 2014
Information provided by (Responsible Party):
Maastricht University Medical Center

Brief Summary:
Aging is accompanied by a progressive loss of skeletal muscle mass and strength, leading to the loss of functional capacity and an increased risk of developing chronic metabolic disease. One of these metabolic diseases interacting with muscle mass is Diabetes Mellitus type 2. Diabetes Mellitus type 2 is characterized by high blood glucose in the context of insulin resistance and relative insulin deficiency. It has become clear that amongst its many actions, insulin is also a vasoactive hormone. Its effect to cause endothelial-nitric oxide dependent vasodilation is physiologic and dose dependent. Recent data suggest that insulin's metabolic and vascular actions are closely linked. This also means that an increase in microvascular perfusion following food intake is more resistant to postprandial insulin release. This physiological process is brought into prominence with increasing age, and even more in type 2 diabetics, and contributes to diminishing glycaemic control. In the present study the investigators will investigate the impact of postprandial insulin release on microvascular recruitment in the oral cavity.

Condition or disease Intervention/treatment Phase
Type 2 Diabetes Mellitus Dietary Supplement: Glucose Dietary Supplement: Placebo Not Applicable

Detailed Description:

To fulfil the increasing demand for real-time evaluation of micro vascular flow in muscle tissue, new techniques have been evaluated. The conventional systemic hemodynamic and oxygenation parameters are neither specific nor sensitive enough to detect regional perfusion. A more complete evaluation of tissue oxygenation can be achieved by adding noninvasive assessment of perfusion in peripheral tissues to global parameters. Noninvasive monitoring of peripheral perfusion could be a complementary approach that allows very early application throughout the hospital and interventional research. Orthogonal polarization spectral (OPS) is a non invasive technique that uses reflected light to produce real-time images of the microcirculation. The technology has been incorporated into a small hand-held videomicroscope which can be used in both research and clinical settings. OPS can assess tissue perfusion using the functional capillary density (FCD), i.e., the length of perfused capillaries per observation area (measured as cm/cm2).

FCD is a very sensitive parameter for determining the status of nutritive perfusion to the tissue. So far, one of the most easily accessible sites in humans for peripheral perfusion monitoring is the mouth. OPS produces excellent images of the sublingual microcirculation by placing the probe under the tongue. Movement artifacts, semiquantitative measure of perfusion, the presence of various secretions such as saliva and blood, observer-related bias, and malfunction of the apparatus are some of the limitations of the technique.

In the present study we will investigate the impact of postprandial insulin release on microvascular recruitment in the oral cavity.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 45 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Basic Science
Official Title: Postprandial Insulin Release and the Impact on Muscle Perfusion
Study Start Date : October 2010
Actual Primary Completion Date : January 2014
Actual Study Completion Date : March 2014

Resource links provided by the National Library of Medicine

Drug Information available for: Dextrose

Arm Intervention/treatment
Experimental: Glucose drink
75 gram glucose, dissolved in 250 ml water
Dietary Supplement: Glucose
Glucose drink: 75 gram dextrose monohydrate, dissolved in 250 ml water
Other Name: GLU

Placebo Comparator: Placebo
250 ml water
Dietary Supplement: Placebo
250 ml water
Other Name: PLA

Primary Outcome Measures :
  1. Glycocalyx permeability [ Time Frame: 30 minutes after ingestion of the drink ]
    Changes in glycocalyx permeability in young, elderly and type 2 diabetics after ingestion of a glucose or water (placebo) drink. The glycocalyx will be measured during 2 h after ingestion of the drink.

Secondary Outcome Measures :
  1. Microvascular density [ Time Frame: 3 h after ingestion of glucose drink ]
    Determination of microvascular density in muscle tissue in young, elderly and type 2 diabetic patients.

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Male
  • Aged between 20-30 or 65-80 years
  • BMI < 30 kg/m2
  • Non insulin-dependent Diabetes mellitus type 2 patients. Use of oral anti-diabetic agents (TZD's, Metformin and/or a sulfonylurea derivative) is allowed.

Exclusion Criteria:

  • Positive history for hypertension
  • Smoking
  • Hypertension (according to WHO criteria)18
  • Use of medication, except for oral blood glucose lowering medication
  • All co morbidities interacting with mobility and muscle metabolism of the lower limbs (e.g. arthrosis, arthritis, spasticity/rigidity, all neurological disorders and paralysis).
  • HbA1c > 10.0%
  • Diagnosed impaired renal or liver function
  • Obesity (BMI>30 kg/m2)
  • Cardiac disease or cardiovascular problems in history
  • Overt diabetic complications

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01476384

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Maastricht University Medical Center+
Maastricht, Limburg, Netherlands, 6229ER
Sponsors and Collaborators
Maastricht University Medical Center
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Principal Investigator: LJC van Loon, Professor Maastricht University

Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Maastricht University Medical Center Identifier: NCT01476384    
Other Study ID Numbers: MEC 10-3-050
MET 10-3-050 ( Registry Identifier: MET 10-3-050 )
First Posted: November 22, 2011    Key Record Dates
Last Update Posted: April 11, 2014
Last Verified: April 2014
Keywords provided by Maastricht University Medical Center:
Additional relevant MeSH terms:
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Diabetes Mellitus, Type 2
Diabetes Mellitus
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Hypoglycemic Agents
Physiological Effects of Drugs