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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT02686996
Registration number
NCT02686996
Ethics application status
Date submitted
9/02/2016
Date registered
22/02/2016
Titles & IDs
Public title
The Potential of Carnosine Supplementation in Reducing the Cardiometabolic Risk
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Scientific title
The Potential of Carnosine Supplementation in Reducing the Cardiometabolic Risk: a Double-blind, Placebo-controlled Trial
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Secondary ID [1]
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16061A
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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 Sensitivity
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Condition category
Condition code
Inflammatory and Immune System
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Allergies
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Other - carnosine
Other interventions - Placebo
Active comparator: Intervention - Each participant will be given a daily oral dose 2 g of carnosine (2 tablets twice daily) for 14 weeks
Placebo comparator: Control - Each participant will be given a daily oral dose 2 g of identical placebo tablets ( 2 tablets twice daily) for 14 weeks
Treatment: Other: carnosine
Carnosine capsules (2g) twice per day for 14 weeks
Other interventions: Placebo
Placebo (methylcellulose) capsules for control group identical to intervention capsules and dose
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Intervention code [1]
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Treatment: Other
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Intervention code [2]
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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 in insulin sensitivity measured by euglycaemic glucose clamp
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Assessment method [1]
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The clamp will be used to measure insulin sensitivity. The clamp is initiated by an intravenous bolus injection of insulin (9milliUnit/kg). Insulin is then constantly infused at a rate of 40 milliUnit.m-2.min-1 for 120 min into an arm vein, whilst glucose is variably infused to maintain euglycaemia. Plasma glucose values will be monitored every 5 minutes during the clamp and the variable infusion rate of glucose is adjusted to maintain blood glucose at a constant value of 5mmol/L.
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Timepoint [1]
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From baseline to 14 weeks
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Secondary outcome [1]
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Change in markers of endothelial dysfunction
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Assessment method [1]
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This is done using non-invasive peripheral arterial tomography (PAT; endothelium-dependent digital pulse amplitude testing (EndoPAT), Itamar Medical Ltd, Israel), which records continuous plethysmo¬graphic signals of the finger arterial pulse wave. Finger plethysmographic probes are placed on each index finger; and after a 5 min equilib¬ration period, a blood pressure cuff on the non-dominant arm is inflated to 60 mmHg above systolic for 5 min and then deflated to induce reactive hyperaemia. Measurements of post-occlusion changes (reactive hyperaemia PAT: RH-PAT) are continued for 10 min. Results are normalised to the non-occluded arm, compensating for potential systemic changes (RH-PAT ratio).
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Timepoint [1]
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From baseline to 14 weeks
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Secondary outcome [2]
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Change in Acute Insulin Secretory Response - Intravenous Glucose Tolerance Test
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Assessment method [2]
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This will be measured in response to 25g intravenous glucose and calculated as the average incremental plasma insulin level from the third to the fifth minute after the glucose bolus.
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Timepoint [2]
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From baseline to 14 weeks
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Secondary outcome [3]
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Change in Resting systolic and diastolic blood pressure
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Assessment method [3]
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Resting systolic and diastolic blood pressure and pulse rate will be measured using an automated oscillometric measurement system (Dinamap, USA) after a 30 minute rest.
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Timepoint [3]
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From baseline to 14 weeks
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Eligibility
Key inclusion criteria
* Age >18 or <60 years,
* Weight change < 5 kg in last 12 months
* BMI >25kg/m2 but weight <159kg due to DEXA scan restrictions
* Non-diabetic, no allergy, non-smoker, no high alcohol use
* No current intake of medications including vitamin supplements
* No kidney, cardiovascular, haematological, respiratory, gastrointestinal, endocrine or central nervous system disease, as well as no psychiatric disorders, no active cancer within the last five years; no presence of acute inflammation (by history, physical or laboratory examination)
* Not pregnant or lactating
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Minimum age
18
Years
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Maximum age
60
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 or > 60 years
* Weight change > 5 kg in last 12 months
* Diabetes (diagnosed or oral glucose tolerance test (OGTT), allergy
* Current smoking habit, high alcohol use
* Current intake of medications including vitamin supplements
* Kidney, cardiovascular, haematological, respiratory, gastrointestinal, endocrine or central nervous system disease, as well as psychiatric disorder, active cancer within the last five years; presence of acute inflammation (by history, physical or laboratory examination)
* pregnancy or lactation
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Study design
Purpose of the study
Prevention
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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
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
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Intervention assignment
Parallel
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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
13/02/2017
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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
12/06/2020
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Actual
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Sample size
Target
84
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
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Monash Centre for Health Research and Implementation - Melbourne
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Recruitment postcode(s) [1]
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3168 - Melbourne
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Funding & Sponsors
Primary sponsor type
Other
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Name
Monash University
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
The aim of this study is to determine whether carnosine supplementation in overweight/obese individuals can improve insulin secretion and/or insulin resistance by decreasing sub clinical inflammation. The investigators hypothesise that carnosine supplementation will reduce type 2 diabetes and cardiovascular risk factors by lowering chronic low-grade inflammation (CLI), oxidative stress, advanced glycation end products (AGEs), and advanced lipoxidation end products (ALEs). Aim :To determine the capacity of carnosine supplementation to decrease major risk factors for type 2 diabetes and cardiovascular disease and identify metabolic pathways involved, specifically by: 1. Reducing diabetes risk (insulin sensitivity; secretory function and glucose tolerance) 2. Improving cardiovascular risk factors (lipids; arterial (aortic) stiffness; central blood pressure (cBP); endothelial function). 3. Decreasing the CLI, oxidative stress, AGEs, and ALEs, and increase detoxification of reactive carbonyl species (RCSs).
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Trial website
https://clinicaltrials.gov/study/NCT02686996
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Trial related presentations / publications
Menon K, Cameron JD, de Courten M, de Courten B. Use of carnosine in the prevention of cardiometabolic risk factors in overweight and obese individuals: study protocol for a randomised, double-blind placebo-controlled trial. BMJ Open. 2021 May 13;11(5):e043680. doi: 10.1136/bmjopen-2020-043680.
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Public notes
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Contacts
Principal investigator
Name
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Barbora de courten, MD,PHD,MPH
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Address
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Monash University
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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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Barbora de Courten, MD,PHD,MPH
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Address
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Country
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Phone
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+61 385722651
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Fax
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Email
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[email protected]
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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/NCT02686996