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The purpose of this research study is to validate (check the accuracy of) laboratory assays, intravenous catheter insertion, and equipment or devices and their reproducibility, which is necessary to perform high quality research on chronic diseases (obesity, pre-diabetes and type-2 diabetes, dyslipidemia, non-alcoholic fatty liver disease, cardiovascular disease, etc.), nutrition, and metabolism (the process by which a substance is handled in your body) at the University of Missouri. As technology changes and we start to use new testing methods, it is necessary to compare results from old tests, equipment and devices and new tests, equipment, or devices and the reproducibility of these measurements to make sure we are getting accurate results. Reproducibility means performing the same test more than once to see if the same results can be achieved each time.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Single arm | For blood assay validation and/or reproducibility testing, blood samples will be taken after an overnight fast or after oral glucose or a mixed meal and analyzed. Measurements will be made by: using different assays to determine best conditions of measurement, or repeat testing on different days. Endothelial cells will be collected from a 20-gauge intravenous catheter. One to six 0.025" J-wires will be sequentially inserted into the catheter. These measurements will allow us to determine: the reproducibility and variability of assays used, best timing of blood and endothelial cell collection and best blood volumes and endothelial cell collection wire passes to reliably perform routine assays. For imaging validation, algorithm development, and/or reproducibility testing, participants may undergo DEXA, MRI, or MRS testing to develop or improve analysis algorithms, to evaluate variability of the measurements, or testing different equipment that measure the same variable. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| endothelial cell collection | Other | Participants may opt to have testing performed including blood sampling, intravenous catheter placement with endothelial cell collection, oral glucose tolerance test, consuming a test meal, having imaging performed such as MRI, DEXA, MRS to investigate use of different assays, different sample treatment approaches to determine optimal conditions that produce the most accurate and reproducible results, and/or repeat testing on different days or with different equipment that measures the same variable. |
| Measure | Description | Time Frame |
|---|---|---|
| Validation and reproducibility testing for blood assays | insulin, C-peptide, glucagon, substrates (free fatty acids, glucose, ketone bodies) and biomarkers of substrate metabolism (e.g., cytokines and adipokines) | through study completion, an average of 10 weeks |
| Validation and reproducibility testing for endothelial cell collection | endothelial cell quantity collected | through study completion, an average of 10 weeks |
| Validation and reproducibility testing for mixed meal ingestion | tolerability and palatability of meal type (protein concentration, carbohydrate concentration) | through study completion, an average of 10 weeks |
| Validation and reproducibility testing for glucose tolerance testing | glucose levels | through study completion, an average of 10 weeks |
| Validation and reproducibility testing for DEXA | body composition analysis | through study completion, an average of 10 weeks |
| Validation and reproducibility testing for MRI | body composition analysis | through study completion, an average of 10 weeks |
| Validation and reproducibility testing for MRS | body composition analysis | through study completion, an average of 10 weeks |
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Inclusion Criteria:
Exclusion Criteria:
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convenience population of volunteers in mid-Missouri region
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Heather McHatton, MPH, RN | Contact | (573) 882-7619 | heathermchatton@health.missouri.edu | |
| Vasavi Shabrish, PhD | Contact | v.shabrish@missouri.edu |
| Name | Affiliation | Role |
|---|---|---|
| Bettina Mittendorfer, PhD | University of Missouri-Columbia | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Missouri School of Medicine | Recruiting | Columbia | Missouri | 65212 | United States |
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| ID | Term |
|---|---|
| D009765 | Obesity |
| ID | Term |
|---|---|
| D050177 | Overweight |
| D044343 | Overnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| D006403 | Hematologic Tests |
| ID | Term |
|---|---|
| D019411 | Clinical Laboratory Techniques |
| D019937 | Diagnostic Techniques and Procedures |
| D003933 | Diagnosis |
| D008919 | Investigative Techniques |
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| D001835 |
| Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |