Routine Validation and Reproducibility Testing of Laboratory Measures and Research Techniques Used for Metabolism Research (VAL)

NCT06286761 | Recruiting

• 1 other identifier: 2100332
• Study Type: observational
• Target: 100
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Obesity

Outcome Measures

Primary Outcomes (7)

• 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

Study Arms (1)

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.

Other: endothelial cell collection

Interventions

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.

Also known as: MRI, DEXA, MRS, blood testing, mixed meal, oral glucose tolerance testing

Single arm

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

convenience population of volunteers in mid-Missouri region

You may qualify if:

• ≥18 and ≤75 years of age
• body mass index ≥18.5 and ≤45 kg/m2
• Weight stable (i.e., ≤3% change)
• ≤150 min of structured exercise/week for at least 2 months before entering the study
• Blood glucose: \< 126 mg/dl fasted, \< 200 mg/dl with 2 hour oral glucose tolerance testing
• Hemoglobin A1C (HbA1C) ≤6.5%
• Dyslipidemia triglycerides ≥125 mg/dL
• No chronic kidney disease
• Not vegan or vegetarian or on high protein diet (e.g. Atkins) or supplements that are not allowed
• No intolerance or allergies to study diet ingredients
• No excessive alcohol or tobacco consumption

You may not qualify if:

• \<18 and \>75 years of age
• body mass index \<18.5 or \>45 kg/m2
• history of or current significant organ system dysfunction (e.g., heart disease, stroke, diabetes, cancer in remission for \<5 years, dementia, chronic kidney disease)
• allergies or intolerances to meal ingredients, vegans or vegetarians
• use of medications that could confound the study outcomes (e.g., anti-inflammatories, immune modulators, etc)
• take dietary supplements (e.g., certain pre- and pro-biotics, fiber, fish oil supplements)
• engaged in regular structured exercise \>150 min per week
• alcohol use disorder as defined by the National Institute of Alcohol Abuse and Alcoholism or use of controlled substances
• pregnant women
• persons who use tobacco
• prisoners
• the inability to grant voluntary informed consent.

Sponsors & Collaborators

• Bettina Mittendorfer: lead

Study Sites (1)

University of Missouri School of Medicine

Columbia, Missouri, 65212, United States

RECRUITING

MeSH Terms

Conditions

Obesity

Interventions

Hematologic Tests

Condition Hierarchy (Ancestors)

Overweight; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Clinical Laboratory Techniques; Diagnostic Techniques and Procedures; Diagnosis; Investigative Techniques

Study Officials

• Bettina Mittendorfer, PhD

  University of Missouri-Columbia

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Heather McHatton, MPH, RN

CONTACT

(573) 882-7619; heathermchatton@health.missouri.edu

Vasavi Shabrish, PhD

CONTACT

v.shabrish@missouri.edu

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Senior Associate Dean for Research; Professor, Medicine & Nutrition; NextGen Director of Clinical and Translational Sciences Unit

Study Record Dates

• First Submitted: February 12, 2024
• First Posted: February 29, 2024
• Study Start: May 8, 2024
• Primary Completion (Estimated): March 1, 2028
• Study Completion (Estimated): March 1, 2028
• Last Updated: July 20, 2025

Record last verified: 2025-07

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)