Type 1 Diabetes MellitusBPK005NCT01439672
Insulin Sensitivity, Impaired Counterregulation, and Glucose Variability
A study testing Mixed meal and insulin challenge in people with Type 1 Diabetes Mellitus, run by University of Virginia at 1 site in United States.
Trial summary
This protocol will investigate physiological parameters including insulin sensitivity and counterregulatory function using a mixed meal test and induced hypoglycemia in subjects with type I diabetes. Read more about this study
- Who is it for?
- Ages 21 to 64 years
- Conditions the study is for
- Type 1 Diabetes Mellitus
- What is being tested?
- Mixed meal and insulin challenge
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 35 participants
- Where
- 1 siteUnited States
- Study dates
- Aug 2010to Mar 2012
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 21 to 64 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Type I diabetes mellitus (TIDM) (as defined by the American Diabetes Association criteria or judgment of a physician) for at least two years prior to the enrollment in the study.
- Use of an insulin pump to treat their diabetes for at least six months prior to the study.
- Ability to use a bolus calculator function with the current insulin pump with pre-defined parameters for glucose goal, carbohydrate ratio, and insulin sensitivity factor.
- Age 21 - 64 years. Adults age 65 and over are likely to have medical exclusions for the follow-up Phase 2 study, which involves induced hypoglycemia.
- Completed Phase 1 of the Institutional Review Board (IRB) #14956 "Development of a Behavioral Observer for Type 1 Diabetes Mellitus"
- Willingness to use lispro (Humalog) insulin two days prior to and during inpatient admission.
- Willingness to perform Self-Monitoring Blood Glucose (SMBG) 4 times per day at times before meals and bedtime.
- Demonstration of proper mental status and cognition for completion of the study.
Who cannot join
- Pregnancy
- Psychiatric disorders that would interfere with study tasks (e.g. mental retardation, substance abuse)
- History of a systemic deep tissue infection with methicillin-resistant staph aureus or Candida albicans
- Known bleeding diathesis or dyscrasia
- Active enrollment in another clinical trial
- Medical condition that would make operating an insulin pump difficult (e.g. blindness, severe arthritis, extensive scar tissue at sites where devices are inserted).
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- Anemia (hematocrit <36% [females], <38% [males]),
- Allergy or adverse reaction to lispro (Humalog) insulin
- Conditions which may increase the risk of induced hypoglycemia such as symptomatic heart disease, congestive heart failure, history of a cerebrovascular event, atrial fibrillation, renal insufficiency (creatinine >1.5) or uncontrolled hypertension (resting blood pressure >140/90).
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Virginia, Center for Diabetes Technology
Charlottesville, Virginia, 22903
About this study
This protocol will investigate physiological parameters including insulin sensitivity and counterregulatory function using a mixed meal test and induced hypoglycemia in subjects with type I diabetes.
Read the detailed description
The principal idea of the proposed research is: in order to be successful, closed-loop control of glucose in diabetes must adapt to individual physiologic characteristics and to the behavioral profile of each person. We propose to build a system that will use observers of patients' behavior and metabolic state and control modules that are responsible for insulin delivery and hypoglycemia prevention. In this phase of the project, we will investigate relationships of insulin sensitivity and impaired counterregulation with blood glucose variability, aiming to develop algorithmic physiology observers, which will track specific parameters of glucose variability and recurrent hypoglycemia as markers of change in a person's insulin sensitivity and counterregulatory ability.
- Conditions
- Type 1 Diabetes Mellitus
- Being tested
- Mixed meal and insulin challenge
- Keywords
- Type 1 Diabetes Mellitus
- Medical subject headings
- Diabetes Mellitus, Type 1
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Mixed meal and insulin challengeDietary supplement
The subject will undergo a mixed meal and insulin challenge as follows: an insulin bolus will be administered and a mixed meal nutrition drink will be consumed over 1-5 minutes. The mixed meal nutrition drink will be selected for that individual to be most likely to raise the glucose levels by 100mg/dl and then return to baseline within a four-hour time period. The nutrition drink will selected from the following types of product lines: Boost products (Nestle Nutrition), Ensure products (Abbott Nutrition), Carnation Instant Breakfast (Nestle Nutrition) or Glucerna (Abbott Nutrition).The pre-meal insulin bolus will be calculated to bring the subject to ~100mg/dl at 1100.
| Study group | Role | What they receive |
|---|---|---|
| Insulin Sensitivity | Experimental | Single arm. Each subject will consume a mixed meal beverage along with insulin administration in order to calculate insulin sensitivity. Receives: Dietary Supplement: Mixed meal and insulin challenge |
What is being measured
The primary outcome is the main question the study is designed to answer.
Insulin Sensitivity
Measure insulin sensitivity following a mixed meal across admissions. Insulin sensitivity was measured based on the minimal model of glucose kinetics using plasma glucose and insulin obtained frequently (approximately every 5-15 minutes) in response to mixed meal challenge.
Measured: 24 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Sep 2011 (estimated)
- Study startAug 2010
- Primary completionMar 2012
- Study completionMar 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Type 1 Diabetes MellitusStudies of the same condition, open and under way.
- More trials run by University of VirginiaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 35 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Virginia
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Sue Brown, University of Virginia
- Investigators
- Sue Brown, MD, Principal investigator, University of Virginia
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01439672
- Sponsor's protocol ID
- 15131
- Other IDs
- R01DK085623
- Acronym
- BPK005
- Status last verified
- Oct 2016
- First submitted
- 20 Sep 2011
- Last updated
- 6 Dec 2016
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 6 Dec 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Insulin Sensitivity, Impaired Counterregulation, and Glucose Variability
- ClinicalTrials.gov ID
- NCT01439672
- Acronym / sponsor ID
- BPK005 / 15131
- Conditions
- Type 1 Diabetes Mellitus
- Keywords
- Type 1 Diabetes Mellitus
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 35 participants (actual)
- Lead sponsor
- University of VirginiaUniversity, hospital or other
- Collaborators
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Study start
- Aug 2010
- Primary completion
- Mar 2012 (actual)
- Study completion
- Mar 2012 (actual)
- First posted
- 23 Sep 2011 (estimated)
- Results
- Posted 14 Apr 2015
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This protocol will investigate physiological parameters including insulin sensitivity and counterregulatory function using a mixed meal test and induced hypoglycemia in subjects with type I diabetes.
Detailed description
The principal idea of the proposed research is: in order to be successful, closed-loop control of glucose in diabetes must adapt to individual physiologic characteristics and to the behavioral profile of each person. We propose to build a system that will use observers of patients' behavior and metabolic state and control modules that are responsible for insulin delivery and hypoglycemia prevention. In this phase of the project, we will investigate relationships of insulin sensitivity and impaired counterregulation with blood glucose variability, aiming to develop algorithmic physiology observers, which will track specific parameters of glucose variability and recurrent hypoglycemia as markers of change in a person's insulin sensitivity and counterregulatory ability.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Insulin Sensitivity | Experimental | Dietary Supplement: Mixed meal and insulin challengeSingle arm. Each subject will consume a mixed meal beverage along with insulin administration in order to calculate insulin sensitivity. |
Who may qualify
- Ages
- 21 to 64 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (8 listed)
- Type I diabetes mellitus (TIDM) (as defined by the American Diabetes Association criteria or judgment of a physician) for at least two years prior to the enrollment in the study.
- Use of an insulin pump to treat their diabetes for at least six months prior to the study.
- Ability to use a bolus calculator function with the current insulin pump with pre-defined parameters for glucose goal, carbohydrate ratio, and insulin sensitivity factor.
- Age 21 - 64 years. Adults age 65 and over are likely to have medical exclusions for the follow-up Phase 2 study, which involves induced hypoglycemia.
- Completed Phase 1 of the Institutional Review Board (IRB) #14956 "Development of a Behavioral Observer for Type 1 Diabetes Mellitus"
Key exclusion criteria (9 listed)
- Pregnancy
- Psychiatric disorders that would interfere with study tasks (e.g. mental retardation, substance abuse)
- History of a systemic deep tissue infection with methicillin-resistant staph aureus or Candida albicans
- Known bleeding diathesis or dyscrasia
- Active enrollment in another clinical trial
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Mixed meal and insulin challengeThe subject will undergo a mixed meal and insulin challenge as follows: an insulin bolus will be administered and a mixed meal nutrition drink will be consumed over 1-5 minutes. The mixed meal nutrition drink will be selected for that individual to be most likely to raise the glucose levels by 100mg/dl and then return to baseline within a four-hour time period. The nutrition drink will selected from the following types of product lines: Boost products (Nestle Nutrition), Ensure products (Abbott Nutrition), Carnation Instant Breakfast (Nestle Nutrition) or Glucerna (Abbott Nutrition).The pre-meal insulin bolus will be calculated to bring the subject to ~100mg/dl at 1100. | Dietary supplement | Insulin Sensitivity |
Primary outcome
Insulin Sensitivity
Time frame: 24 hours
Measure insulin sensitivity following a mixed meal across admissions. Insulin sensitivity was measured based on the minimal model of glucose kinetics using plasma glucose and insulin obtained frequently (approximately every 5-15 minutes) in response to mixed meal challenge.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Dec 2016.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Sue Brown, MD principal investigator
University of Virginia
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Mixed meal and insulin challenge in people with Type 1 Diabetes Mellitus, run by University of Virginia at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Dec 2016. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 14 Apr 2015). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Insulin Sensitivity (time frame: 24 hours). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Dec 2016.