- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05454891
Extended Bolus for Meals in a Closed-loop System
April 8, 2024 updated by: University of California, San Francisco
Postprandial Glucose Control Using an Extended Bolus for High-fat High Protein Meals in a Closed-loop System in Patients With Type 1 Diabetes
This study aims to evaluate whether the use of an extended bolus will improve glucose control with high-fat high protein meals using a closed-loop system.
The new knowledge gained from this study may provide a method to allow for the proper administration of insulin over an extended period to mitigate the risk of prolonged hyperglycemia or early hypoglycemia.
Study Overview
Status
Recruiting
Conditions
Study Type
Interventional
Enrollment (Estimated)
30
Phase
- Phase 4
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Laya Ekhlaspour, MD
- Phone Number: 415-514-8531
- Email: laya.ekhlaspour@ucsf.edu
Study Contact Backup
- Name: Rebecca Wesch
- Phone Number: (415) 476-5984
- Email: Rebecca.wesch@ucsf.edu
Study Locations
-
-
California
-
San Francisco, California, United States, 94158
- Recruiting
- University of California San Francisco
-
Contact:
- Rebecca Wesch
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
13 years to 18 years (Child, Adult)
Accepts Healthy Volunteers
No
Description
Inclusion Criteria
- Age between 13 and 19 years old, A1C > 6% at screening
- Diagnosed with type 1 diabetes for at least one year
- Total daily dose (TDD) of insulin ≥ 0.3 units/kg/day
- Currently using the Control IQ closed-loop system
- Willing to abide by meal recommendations and study procedures
- Willing and able to sign the Informed Consent Form (ICF) and/or has a parent or guardian willing and able to sign the ICF
- Use an Android or Apple smartphone
- Willingness not to start any new non-insulin glucose-lowering agent during the course of the trial
- Participant and parent(s)/guardian(s) willingness to participate in all training sessions as directed by study staff
- Parent/guardian proficient in reading and writing English
- Live in the United States, with no plans to move outside the United States during the study period
Exclusion Criteria
- A1C >10%
- One or more episodes of severe hypoglycemia or DKA requiring ER visit or hospitalization within the past three months
- Used non-insulin anti-diabetic medication within the last 30 days other than metformin
- Known history of gastroparesis, seizure disorder, adrenal insufficiency, or ongoing renal or hepatic disease
- Pregnancy or lactation
- Untreated or unstable hypothyroidism
- Currently undergoing cancer treatment or systemic treatment with steroids
- Untreated or inadequately treated mental illness
- Current alcohol abuse
- Current illness that would interfere with participation in the study
- Delayed gastric emptying or any concurrent conditions that can be associated with delayed gastric emptying or altered digestion; and the use of any medication that affects gastric emptying
- Celiac Disease
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: High Fat High Protein (HFHP) Meal- extended then standard insulin bolus arm
Subjects will receive extended meal bolus for breakfast on the first day and standard meal bolus on the second day of the study.
|
For a standardized HFHP breakfast, participants will receive an extended meal bolus of insulin on the first morning and a standard meal bolus of insulin on the second morning of the study.
|
Experimental: High Fat High Protein (HFHP) Meal- standard then extended insulin bolus arm
Subjects will receive standard meal bolus for breakfast on the first day and extended meal bolus on the second day.
|
For a standardized HFHP breakfast, participants will receive a standard bolus of insulin on the first morning and an extended bolus of insulin on the second morning of the study.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Glucose Area Under Curve [AUC]
Time Frame: Baseline and 5 hours post-bolus
|
Area under the curve between glucose trace and starting glucose (mg/dL* hour)
|
Baseline and 5 hours post-bolus
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Percentage of time between 70-180 mg/dL
Time Frame: Baseline and 5 hours post-bolus
|
Percentage of time spent between 70-180 mg/dl based on Continuous Glucose Monitor (CGM) values
|
Baseline and 5 hours post-bolus
|
Percentage of time in hypoglycemic range (defined as < 70 mg/dL)
Time Frame: Baseline and 5 hours post-bolus
|
Percentage of time spent with blood sugar less than 70 mg/dL based on Continuous Glucose Monitor (CGM) values
|
Baseline and 5 hours post-bolus
|
Average glucose
Time Frame: Baseline and 5 hours post-bolus
|
Average glucose value based on Continuous Glucose Monitor (CGM) values
|
Baseline and 5 hours post-bolus
|
Percentage of time in hyperglycemic range (defined as ≥180 mg/dL);
Time Frame: Baseline and 5 hours post-bolus
|
Percentage of time spent with blood sugar higher than 180 mg/dL based on Continuous Glucose Monitor (CGM) values
|
Baseline and 5 hours post-bolus
|
Insulin dosage
Time Frame: Baseline and 5 hours post-bolus
|
Total insulin received during 5 hrs ( manual bolus as well as automated)
|
Baseline and 5 hours post-bolus
|
Time to target
Time Frame: Baseline and 5 hours post-bolus
|
Time spent till blood glucose returns to range
|
Baseline and 5 hours post-bolus
|
Time to baseline
Time Frame: Baseline and 5 hours post-bolus
|
Time spent till blood glucose returns to baseline
|
Baseline and 5 hours post-bolus
|
Time to peak glucose
Time Frame: Baseline and 5 hours post-bolus
|
Time spent till blood glucose reaches the maximum value after meal
|
Baseline and 5 hours post-bolus
|
Change in glucose
Time Frame: Baseline and 5 hours post-bolus
|
The difference between baseline to max glucose value
|
Baseline and 5 hours post-bolus
|
Peak glucose concentration
Time Frame: Baseline and 5 hours post-bolus
|
Max blood glucose
|
Baseline and 5 hours post-bolus
|
Percentage of time between 70-140 mg/dL
Time Frame: Baseline and 5 hours post-bolus
|
Percent of glucose readings from CGM system between 70-140 mg/dL per unit of time
|
Baseline and 5 hours post-bolus
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Laya Ekhlaspour, MD, University of California, San Francisco
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
July 15, 2022
Primary Completion (Estimated)
July 30, 2024
Study Completion (Estimated)
September 30, 2024
Study Registration Dates
First Submitted
June 24, 2022
First Submitted That Met QC Criteria
July 8, 2022
First Posted (Actual)
July 12, 2022
Study Record Updates
Last Update Posted (Actual)
April 10, 2024
Last Update Submitted That Met QC Criteria
April 8, 2024
Last Verified
April 1, 2024
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 58992
- 5K23DK121942-02 (U.S. NIH Grant/Contract)
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Yes
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
No
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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