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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT02708875
Registration number
NCT02708875
Ethics application status
Date submitted
17/02/2016
Date registered
15/03/2016
Titles & IDs
Public title
Microvascular Insulin Resistance and Mixed Meal Challenge
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Scientific title
Microvascular Insulin Resistance and Mixed Meal Challenge
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Secondary ID [1]
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H14086
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Insulin Resistance
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Condition category
Condition code
Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Other interventions - Mixed Meal Challenge
Other interventions - Glucose Challenge
Experimental: Mixed Meal Challenge - Participants will consume a liquid mixed meal (\~300 calories - fat, carbohydrate, and protein) for monitoring changes in glucose metabolism, plasma insulin and microvascular responses in skeletal muscle over 2 hours.
Active comparator: Glucose Challenge - Participants will consume a glucose challenge (50g glucose) for monitoring changes in glucose metabolism, plasma insulin and microvascular responses in skeletal muscle over 2 hours.
Other interventions: Mixed Meal Challenge
Liquid mixed meal (300 calories - fat, carbohydrate, and protein).
Other interventions: Glucose Challenge
Glucose drink (50g glucose)
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Intervention code [1]
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Other interventions
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Change from baseline in muscle microvascular blood flow
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Assessment method [1]
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Microvascular responses will be measured by contrast enhanced ultrasound before and 1hr after each challenge.
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Timepoint [1]
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1 hr
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Secondary outcome [1]
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Changes in blood glucose levels
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Assessment method [1]
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Blood glucose levels will be measured at 0, 15, 30, 60, 90 and 120 min following each challenge.
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Timepoint [1]
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2 hr
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Secondary outcome [2]
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Changes in plasma insulin levels
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Assessment method [2]
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Plasma insulin levels will be measured at 0, 15, 30, 60, 90 and 120 min following each challenge.
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Timepoint [2]
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2hr
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Secondary outcome [3]
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Changes in the respiratory exchange ratio (RER)
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Assessment method [3]
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Changes in RER will be measured by metabolic cart during each challenge.
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Timepoint [3]
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1 hr
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Eligibility
Key inclusion criteria
* Aged 18-70 years.
* Normal to overweight (BMI 19-35 kg/m2).
* Normotensive (Seated brachial blood pressure <160/100 mmHg).
* Considered healthy (HbA1c <6.5 %) or have clinically diagnosed type 2 diabetes.
* Either have a parent with T2D, or no family history of type 2 diabetes for two generations.
* Have given signed informed consent to participate in the study
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Minimum age
18
Years
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Maximum age
70
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
* Age <18 yrs or >70 yrs
* Morbidly obese with a BMI =36 kg/m2
* History of myocardial infarction or stroke
* History of malignancy within past 5 years (except for non-melanoma skin cancers)
* Current smoker
* History of severe liver disease
* History of drug or alcohol abuse
* Elective major surgery during the course of the study
* Pregnancy/lactation
* Participation or intention to participate in another clinical research study during the study period.
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Study design
Purpose of the study
Other
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Crossover
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Other design features
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Phase
NA
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
UNKNOWN
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/08/2014
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
1/12/2021
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Actual
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Sample size
Target
45
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
TAS,VIC
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Recruitment hospital [1]
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Menzies Institute for Medical Research - Hobart
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Recruitment hospital [2]
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Deakin University - Burwood
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Recruitment postcode(s) [1]
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7000 - Hobart
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Recruitment postcode(s) [2]
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3125 - Burwood
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Funding & Sponsors
Primary sponsor type
Other
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Name
Menzies Institute for Medical Research
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Address
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Country
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Other collaborator category [1]
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Other
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Name [1]
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Deakin University
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Address [1]
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Country [1]
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Ethics approval
Ethics application status
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Summary
Brief summary
Insulin resistance (or pre-diabetes) is diagnosed using the oral glucose tolerance test. However, high blood glucose levels during this test may adversely impact on microvascular function. Investigators will determine whether a liquid mixed meal challenge (from carbohydrate, protein and fat) is a more appropriate test for assessing microvascular-derived insulin resistance.
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Trial website
https://clinicaltrials.gov/study/NCT02708875
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Michelle A Keske, PhD
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Address
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Menzies Institute for Medical Research
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Country
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Phone
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Fax
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Email
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Contact person for public queries
Name
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Address
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Country
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Phone
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Fax
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Email
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Contact person for scientific queries
Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results not provided in
https://clinicaltrials.gov/study/NCT02708875