Glucotoxicity and Acute Exercise

NCT ID: NCT01771614

Last Updated: 2018-05-16

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

WITHDRAWN

Clinical Phase

NA

Study Classification

INTERVENTIONAL

Study Start Date

2016-08-31

Study Completion Date

2017-01-31

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

Experimental hyperglycemia (5 hours) will be induced via a constant- or fluctuating-rate glucose infusion to establish different patterns of glycemia in healthy individuals. The effects of these acute models of hyperglycemia on the adaptations to a single aerobic exercise bout will be tested. Changes in pancreatic endocrine function, insulin sensitivity, endothelial function, and oxidative stress will be measured.

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Type 1 Diabetes Type 2 Diabetes

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Normoglycemia + exercise

At T = 0 h participants will undergo an intravenous glucose tolerance test (IVGTT, 0.33 g/kg glucose) immediately followed by a 4-hour rest period. At T = 5 h, participants will undertake 45 minutes of moderate-intensity (70% VO2max) bicycle ergometry. Immediately following (T = 6 h) and 1- (T = 7 h), 3- (T = 9 h), and 18- hours (T = 24 h) after exercise, participants will undergo additional IVGTTs.

Group Type EXPERIMENTAL

Exercise

Intervention Type BEHAVIORAL

Steady-State Hyperglycemia + exercise

At T = 0 h participants will undergo an intravenous glucose tolerance test (IVGTT, 0.33 g/kg glucose) immediately followed by a 4-hour rest period. During this time, steady-state hyperglycemia (\~10 mM) will be induced experimentally via a variable-rate intravenous infusion of 20% dextrose. At T = 5 h, participants will undertake 45 minutes of moderate-intensity (70% VO2max) bicycle ergometry. Immediately following (T = 6 h) and 1- (T = 7 h), 3- (T = 9 h), and 18- hours (T = 24 h) after exercise, participants will undergo additional IVGTTs.

Group Type EXPERIMENTAL

Exercise

Intervention Type BEHAVIORAL

Hyperglycemia

Intervention Type PROCEDURE

Fluctuating Hyperglycemia + exercise

At T = 0 h participants will undergo an intravenous glucose tolerance test (IVGTT, 0.33 g/kg glucose) immediately followed by a 4-hour rest period. During this time, fluctuating hyperglycemia (\~8-15 mM) will be induced by intravenously injecting 0.15 g/kg boluses of 20% dextrose every 30 minutes. At T = 5 h, participants will undertake 45 minutes of moderate-intensity (70% VO2max) bicycle ergometry. Immediately following (T = 6 h) and 1- (T = 7 h), 3- (T = 9 h), and 18- hours (T = 24 h) after exercise, participants will undergo additional IVGTTs.

Group Type EXPERIMENTAL

Exercise

Intervention Type BEHAVIORAL

Hyperglycemia

Intervention Type PROCEDURE

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

Exercise

Intervention Type BEHAVIORAL

Hyperglycemia

Intervention Type PROCEDURE

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

* Male
* Age 18-50 years
* Body Mass Index 19-30 kg/m2
* Generally healthy

Exclusion Criteria

* Regular use of anti-inflammatory medication
* Smokers
* More than 2 kg weight change in prior 6 months
* Previous weight loss surgery
* Cancer, or evidence of chronic haematological, pulmonary, cardiac, hepatic, renal, or gastrointestinal disease
* Evidence of diabetes
* Engaged in moderate or vigorous activity on more than 5 days per week
Minimum Eligible Age

18 Years

Maximum Eligible Age

50 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes

Sponsors

Meet the organizations funding or collaborating on the study and learn about their roles.

Rigshospitalet, Denmark

OTHER

Sponsor Role lead

Responsible Party

Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.

Thomas Solomon

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

Learn about the lead researchers overseeing the trial and their institutional affiliations.

Thomas P Solomon, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Birmingham

Locations

Explore where the study is taking place and check the recruitment status at each participating site.

University of Birmingham

Birmingham, West Midlands, United Kingdom

Site Status

Countries

Review the countries where the study has at least one active or historical site.

United Kingdom

Other Identifiers

Review additional registry numbers or institutional identifiers associated with this trial.

GlucotoxEx

Identifier Type: -

Identifier Source: org_study_id

More Related Trials

Additional clinical trials that may be relevant based on similarity analysis.

Glucose Variability in Subclinical Hypertrophy
NCT02748434 ACTIVE_NOT_RECRUITING NA
Early Diabetes Intervention Program
NCT01470937 COMPLETED PHASE4
Peripheral Metabolic Effects of Ghrelin
NCT00771940 COMPLETED PHASE1