Feasibility of Closed-loop Automated Insulin Delivery System by Primary Care & Endocrinology, in Person & Via Telehealth

Assessing Feasibility, Safety, and Efficacy of Deploying a Closed-loop Automated Insulin Delivery System by Community-based Primary Care Physicians and Academic Endocrinologists, in Person and Through Telehealth

This is a study assessing the feasibility of using the insulin-only configuration of the iLet bionic pancreas with initiation in pump-naïve people with type 1 diabetes in a primary care practice with either in-person training and follow-up (PC-IP) or with training and follow-up via telehealth (PC-TH). As a comparison, the iLet will be initiated by an academic endocrinology practice with either in-person training and follow-up (EN-IP) or with training and follow-up via telehealth (EN-TH).

Study Overview

• Status: Completed
• Conditions: Diabetes Mellitus, Type 1; Type 1 Diabetes; Diabetes type1; Type 1 Diabetes Mellitus; Autoimmune Diabetes; Diabetes Mellitus, Insulin-Dependent; Juvenile-Onset Diabetes; Diabetes, Autoimmune; Insulin-Dependent Diabetes Mellitus 1; Diabetes Mellitus, Insulin-Dependent, 1; Diabetes Mellitus, Brittle; Diabetes Mellitus, Juvenile-Onset; Diabetes Mellitus, Ketosis-Prone; Diabetes Mellitus, Sudden-Onset
• Intervention / Treatment: Other: Usual Care; Device: Bionic Pancreas

Detailed Description

This is a study assessing the feasibility of deploying the iLet bionic pancreas system in the insulin-only configuration to pump-naïve MDI users with type 1 diabetes, in the setting of being recruited from community-based primary care practices and being trained and managed by primary care providers (PC group), and in pump- and CGM-experienced (sensor-augmented pump or hybrid closed-loop) users with type 1 diabetes recruited from, trained, and managed by an academic endocrinology practice (EN group). In both practice settings, the exclusive use of telehealth (TH) visits will be assessed, as will the use of in-person (IP) visits. We will enroll 40 adult volunteers (≥ 18 years old) with type 1 diabetes, 20 who are insulin pump naïve MDI users enrolled from community primary care practices by University of Colorado Family Medicine (PC group) and 20 who are technology-savvy sensor-augmented pump or hybrid closed-loop users enrolled by the Massachusetts General Hospital Diabetes Clinical Research Center (EN group). Ten of the participants at each center will be trained and managed throughout the trial using in-person visits (PC-IP and EN-IP groups) and the other ten from each center will be trained and managed throughout the trial exclusively via telehealth visits (PC-TH and EN-TH groups). This will result in four study cohorts overall (endocrinology in-person, endocrinology telehealth, primary care in-person, primary care telehealth). Subjects in all four groups will each participate, in random order, in one 14-day study arm under their own usual care (UC arm) and one 14-day study arm under the insulin-only configuration of the iLet bionic pancreas (iLet arm).

• Study Type: Interventional
• Enrollment (Actual): 54
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Colorado
    • Aurora, Colorado, United States, 80045
      • University of Colorado Anschutz Medical Campus
  • Massachusetts
    • Boston, Massachusetts, United States, 02114
      • Massachusetts General Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years to 81 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria

1. Age 18-85 years, BMI ≥ 18.5, have had clinical type 1 diabetes for at least one year, and have taken insulin for at least 1 year

   1. Prescription diabetes medication regimen stable for > 1 month, including any adjunctive anti-diabetic medications (except for medications that will not affect the safety of the study and are not expected to affect any outcome of the study, in the judgment of the site principal investigator)
   2. This does not include changes to any insulin doses, including basal rates/long-acting insulin doses, carbohydrate to insulin ratios and correction factors
2. Willing to wear one Dexcom CGM transmitter and sensor (sensor must be changed every 10 days), and one infusion set that must be replaced at least every 3 days.
3. Endocrinology practice criterion is that diabetes is managed using sensor-augmented insulin pump therapy or artificial pancreas therapy for ≥ 3 months)
4. Primary care practice criteria are that diabetes is managed by multiple daily insulin injections (insulin-pump naïve).
5. TH group criterion is that participant must have hardware and internet access capable of 2-way video and audio communication

Exclusion Criteria

1. Unable to provide informed consent (e.g. impaired cognition or judgment)
2. Unable to safely comply with study procedures and reporting requirements (e.g. impairment of vision or dexterity that prevents safe operation of the bionic pancreas, impaired memory)
3. Unable to speak and read English, as iLet BP support materials and device menus are currently available in English only.

4. Plan to change usual diabetes regimen in the next 3 months including before and during participation in the study

   1. This would include changing from MDI to pump or from pump to MDI, and starting a CGM if not previously used
   2. This would not include changes to any insulin doses, including basal rates/long acting insulin doses, carbohydrate to insulin ratios and correction factors
5. Current use of non-FDA approved closed-loop or hybrid closed-loop insulin delivery system (e.g. "Loop" or "Open APS")
6. Unwilling to switch to lispro or aspart for the duration of the study's iLet arm (e.g. from Fiasp or Lyumjev)
7. Known hemoglobinopathy (sickle cell trait is not an exclusion)
8. Current participation in another diabetes-related clinical trial, has a medical condition, or use of a medication that, in the judgment of the investigator, could compromise the results of this study or the safety of the participant
9. History of diabetes due to cystic fibrosis, pancreatitis, or other pancreatic disease, including pancreatic tumor or insulinoma, or history of complete pancreatectomy
10. Have a history of intermittently required glucocorticoid treatment (e.g., but not limited to, for the treatment of asthma, inflammatory bowel disease).
11. A1c >11.0% (most recent value up to 1 year prior acceptable; if none available or >1 year prior, participant will be instructed to obtain A1c through their usual care provider and to make copy of result available to study team)
12. History of diabetic ketoacidosis (DKA) within the past month
13. Electrically powered implants (e.g. cochlear implants, neurostimulators) that might be susceptible to RF interference
14. Established history of allergy or severe reaction to adhesive or tape that must be used in the study

15. Currently treated with GLP-1 analogue, thiazolidinedione (TZD), sulfonylurea, pramlintide, or SGLT-2 inhibitor medication (use more than 3 months prior to enrollment is acceptable)

    a. If using metformin, participants: i. Must be on a stable dose for 1 month prior to enrollment ii. Metformin can be continued while the iLet is used

16. Pregnant (positive urine HCG), breast feeding, plan to become pregnant in the next 6 months, or premenopausal participants who are sexually active without use of contraception
17. Renal failure on dialysis or chronic renal disease with a GFR or eGFR <30mL/min (values within the last two years will be accepted; if none available or >2 years prior, participant will be instructed to obtain GFR or eGFR through their usual care provider and to make copy of result available to study team)

18. Any condition that, in the opinion of the site principal investigator, could interfere with the safe or effective completion of the study.

    a. Conditions to be considered by the investigator may include, but are not limited to, the following: i. Alcohol or drug abuse ii. Use of prescription drugs that may dull the sensorium, reduce sensitivity to symptoms of hypoglycemia, or hinder decision making during the period of participation in the study iii. Coronary artery disease that is not stable with medical management, including unstable angina, angina that prevents moderate exercise (e.g. exercise of intensity up to 6 METS) despite medical management, or within the last 12 months before screening, a history of myocardial infarction, percutaneous coronary intervention, enzymatic lysis of a presumed coronary occlusion, or coronary artery bypass grafting iv. Known history of prolonged QTc interval, malignant arrhythmia, or congenital heart disease v. Congestive heart failure with New York Heart Association (NYHA) Functional Classification III or IV vi. History of TIA or stroke in the last 12 months vii. Untreated or inadequately treated mental illness viii. History of eating disorder within the last 2 years, such as anorexia, bulimia, or diabulimia or omission of insulin to manipulate weight ix. History of intentional, inappropriate administration of insulin leading to severe hypoglycemia requiring treatment

19. Employed by, or having immediate family members employed by Beta Bionics, or being directly involved in conducting the clinical trial, or having a direct supervisor at place of employment who is also directly involved in conducting the clinical trial (as a study investigator, coordinator, etc.); or having a first-degree relative who is directly involved in conducting the clinical trial
20. Unable to avoid hydroxyurea for duration of study (interferes with accuracy of Dexcom G6 CGM)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

8

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: EN-IP-UC first, Then BP; Random-order cross-over participants managed by ENDOCRINOLOGY with IN-PERSON visits, assigned by randomization to undergo 14 days of Usual Care, followed by 14 days of Bionic Pancreas. There was no washout period between arms.	Other: Usual Care; 14 days of the participant's usual care of their type 1 diabetes; Other Names: UC
Experimental: EN-TH-UC first, Then BP; Random-order cross-over participants managed by ENDOCRINOLOGY with TELEHEALTH visits, assigned by randomization to undergo 14 days of Usual Care, followed by 14 days of Bionic Pancreas. There was no washout period between arms.	Other: Usual Care; 14 days of the participant's usual care of their type 1 diabetes; Other Names: UC
Experimental: EN-IP-BP first, Then UC; Random-order cross-over participants managed by ENDOCRINOLOGY with IN PERSON visits, assigned by randomization to undergo 14 days of Bionic Pancreas, followed by 14 days of Usual Care. There was no washout period between arms.	Device: Bionic Pancreas; 14 days using the insulin-only configuration of the iLet Bionic Pancreas (Beta Bionics, Inc.), which automates insulin delivery, as the only intended mode of insulin delivery.; Other Names: BP
Experimental: EN-TH-BP first, Then UC; Random-order cross-over participants managed by ENDOCRINOLOGY with TELEHEALTH visits, assigned by randomization to undergo 14 days of Bionic Pancreas, followed by 14 days of Usual Care. There was no washout period between arms.	Device: Bionic Pancreas; 14 days using the insulin-only configuration of the iLet Bionic Pancreas (Beta Bionics, Inc.), which automates insulin delivery, as the only intended mode of insulin delivery.; Other Names: BP
Experimental: PC-IP-UC first, Then BP; Random-order cross-over participants managed by PRIMARY CARE with IN-PERSON visits, assigned by randomization to undergo 14 days of Usual Care, followed by 14 days of Bionic Pancreas. There was no washout period between arms.	Other: Usual Care; 14 days of the participant's usual care of their type 1 diabetes; Other Names: UC
Experimental: PC-TH-UC first, Then BP; Random-order cross-over participants managed by PRIMARY CARE with TELEHEALTH visits, assigned by randomization to undergo 14 days of Usual Care, followed by 14 days of Bionic Pancreas. There was no washout period between arms.	Other: Usual Care; 14 days of the participant's usual care of their type 1 diabetes; Other Names: UC
Experimental: PC-IP-BP first, Then UC; Random-order cross-over participants managed by PRIMARY CARE with IN PERSON visits, assigned by randomization to undergo 14 days of Bionic Pancreas, followed by 14 days of Usual Care. There was no washout period between arms.	Device: Bionic Pancreas; 14 days using the insulin-only configuration of the iLet Bionic Pancreas (Beta Bionics, Inc.), which automates insulin delivery, as the only intended mode of insulin delivery.; Other Names: BP
Experimental: PC-TH-BP first, Then UC; Random-order cross-over participants managed by PRIMARY CARE with TELEHEALTH visits, assigned by randomization to undergo 14 days of Bionic Pancreas, followed by 14 days of Usual Care. There was no washout period between arms.	Device: Bionic Pancreas; 14 days using the insulin-only configuration of the iLet Bionic Pancreas (Beta Bionics, Inc.), which automates insulin delivery, as the only intended mode of insulin delivery.; Other Names: BP

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percentage of Individuals With Mean CGM Glucose <183 mg/dL (Corresponding to an Estimated HbA1c of <8.0%) on Days 3-14, by Group.	The outcome is categorical, and the primary outcome is not a direct comparison of the mean CGM glucose between the groups.	BP Arm Days 3-14

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mean CGM Glucose on Days 3-14	Individual CGM values from days 3-14 were averaged together for each participant.	BP Arm Days 3-14
Percentage of Time With CGM Glucose <54 mg/dl on Days 3-14	Calculated from all individual CGM values from days 3-14 for each participant.	BP Arm Days 3-14
Percentage of Time With CGM Glucose in the 70-180 mg/dl Range on Days 3-14	Calculated from all individual CGM values from days 3-14 for each participant.	BP Arm Days 3-14
Percentage of Individuals With Mean CGM Glucose <154 mg/dL (Corresponding to an Estimated HbA1c of <7.0%) on Days 3-14, by Group.	Calculated from all individual CGM values from days 3-14 for each participant.	BP Arm Days 3-14

Collaborators and Investigators

• Sponsor: University of Colorado, Denver
• Collaborators: Massachusetts General Hospital; Beta Bionics, Inc.
• Investigators: Principal Investigator: Sean M Oser, MD, MPH, University of Colorado - Anschutz Medical Campus; Principal Investigator: Tamara K Oser, MD, University of Colorado - Anschutz Medical Campus

Study record dates

Study Major Dates

• Study Start (Actual): March 31, 2022
• Primary Completion (Actual): May 23, 2023
• Study Completion (Actual): May 23, 2023

Study Registration Dates

• First Submitted: November 23, 2021
• First Submitted That Met QC Criteria: December 8, 2021
• First Posted (Actual): December 23, 2021

Study Record Updates

• Last Update Posted (Actual): October 21, 2024
• Last Update Submitted That Met QC Criteria: October 18, 2024
• Last Verified: October 1, 2024

More Information

Terms related to this study

• Keywords: insulin; closed loop; bionic pancreas; Pancreas, Artificial; automated insulin delivery system; t1d; t1dm
• Additional Relevant MeSH Terms: Glucose Metabolism Disorders; Metabolic Diseases; Immune System Diseases; Autoimmune Diseases; Endocrine System Diseases; Diabetes Mellitus; Diabetes Mellitus, Type 1; Gastrointestinal Agents; Pancrelipase
• Other Study ID Numbers: 21-3272

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: Deidentified glucose data and psychosocial data will be shared with research collaborators.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes