- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03998111
Genetic Variation in CLTCL1 and Whole-body Glucose Control
The Role of Genetic Variation in CLTCL1 and Other Related Genes in Relation to Whole-body Glucose Control: A Pilot Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The ability to maintain relatively stable blood glucose concentrations after eating has important implications for health. Individuals who are better able to maintain stable blood glucose concentrations after consuming carbohydrate have a lower risk of mortality and morbidity from cardiovascular disease. Muscle is the primary tissue for glucose disposal after a meal and the ability to tolerate a glucose load is largely dependent on the ability of muscle to respond to insulin by translocating the glucose transporter, GLUT4, to the muscle cell membrane, facilitating glucose import into muscle from the circulation. Therefore, by understanding the mechanisms that explain why some people are better able to maintain glucose control can give insight into how to target physiological pathways (such as muscle glucose uptake) to reduce disease risk and improve health.
Clathrins are cytoplasmic proteins that play essential roles in cell membrane trafficking pathways. Pilot data indicate that the clathrin heavy chain isoform 22 (CHC22) plays a key role in intracellular targeting of GLUT4 and may therefore play an important role in whole-body glucose control. Cell-based studies suggest that genetic variation in the CLTCL1 gene (which encodes for CHC22) at SNP rs1061325, influences GLUT4 retention. It is currently unknown whether genetic variation in CHC22 has consequences for whole-body glucose control in humans.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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-
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Bath, United Kingdom, BA2 7AY
- Department for Health, University of Bath
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Body mass index between 18.5-29.9 kg/m^2
- Aged 18-65 years
- Able and willing to provide informed consent and safely comply with study procedures
Exclusion Criteria:
- Any reported condition or behaviour deemed either to pose undue personal risk to the participant or introduce bias
- Any diagnosed metabolic disease (e.g. type 1 or type 2 diabetes)
- Any reported use of substances which may pose undue personal risk to the participants or introduce bias into the experiment
- Lifestyle not conforming to standard sleep-wake cycle (e.g. shift worker)
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Trial
Participants will undergo one trial visit where they will ingest an oral glucose load diluted in solution (oral glucose tolerance test) and blood samples will be measured over the following 2-hours.
The buffy coat layer from the baseline sample will be obtained to extract DNA.
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Participants will ingest 75 g anhydrous glucose dissolved in water and the blood responses will be measured over the following 2-hours using a venous cannula.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Plasma glucose incremental area under the curve (CHC22 genotype)
Time Frame: 2 hours
|
Plasma glucose samples will be obtained throughout the 2-hour postprandial period and the incremental area under the curve will be calculated, this will be grouped by CHC22 genotype.
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2 hours
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Peak plasma glucose (CHC22 genotype)
Time Frame: 2 hours
|
Plasma glucose samples will be obtained throughout the 2-hour postprandial period and the peak glucose concentration will be measured, this will be grouped by CHC22 genotype.
|
2 hours
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Fasting plasma glucose concentrations (CHC22 genotype)
Time Frame: 2 hours
|
Plasma glucose will be measured at baseline and will be grouped by CHC22 genotype.
|
2 hours
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Plasma glucose incremental area under the curve (other genotypes)
Time Frame: 2 hours
|
Plasma glucose samples will be obtained throughout the 2-hour postprandial period and the incremental area under the curve will be calculated, this will be grouped by genotyping other genes related to glucose control or sweet taste sensitivity.
|
2 hours
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Fasting plasma glucose concentrations (other genotypes)
Time Frame: 2 hours
|
Plasma glucose will be measured at baseline and will be grouped by genotypes related to glucose control and sweet taste sensitivity.
|
2 hours
|
Matsuda insulin sensitivity index
Time Frame: 2 hours
|
Matsuda insulin sensitivity index will be calculated using blood samples collected in the 2-hour postprandial period.
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2 hours
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Homeostasis model of insulin resistance
Time Frame: 2 hours
|
Homeostasis model of insulin resistance will be calculated using blood samples collected in the 2-hour postprandial period.
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2 hours
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Collaborators and Investigators
Sponsor
Collaborators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- EP 17/18 252
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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