Cadisegliatin added to insulin in adults with Type 1 diabetes using hybrid closed loop systems
Official title: Hybrid CATT1: Hybrid Closed Loop Insulin Pumps With Cadisegliatin as Adjunctive Treatment in Patients With Type 1 Diabetes A Phase 2a Double Blind Randomized Cross-Over Study
Run by vTv Therapeutics · NCT07616206 · Data updated 2026-11-12
This study tests whether cadisegliatin taken once daily can help people with Type 1 diabetes who are already using a hybrid closed-loop insulin pump manage blood sugar better when added to their usual insulin therapy.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 40 (estimated) |
| Sponsor | vTv Therapeutics Industry-sponsored |
| Locations | 6 sites (Modesto, California and 5 other locations) |
| Status | Recruiting |
| Started | September 29, 2026 |
| Main results expected | June 2027 |
| Study ends | June 2027 |
| Registry record updated | November 10, 2026 |
| Trial ID | NCT07616206 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 18 and older with Type 1 diabetes using a hybrid closed-loop insulin pump for at least 3 months and with suboptimal glycemic control (average TIR <70% in the prior 7 days).
✕Probably not a fit
Patients with Type 2 diabetes or other forms of diabetes, recent DKA, uncontrolled thyroid disease, or significant QTc prolongation may not benefit and could be excluded.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a Phase 2a, multicenter, double-blind, cross-over trial in adults with Type 1 diabetes using hybrid closed-loop systems. Participants will receive cadisegliatin 800 mg or placebo daily in two 6-week treatment periods separated by a 2-week washout, with a screen and device training beforehand. The study aims to gather preliminary data on efficacy and safety of cadisegliatin in an HCL setting. A total of 20 weeks of participation includes device wear, CGM use, and insulin adjustments. Primary outcomes will inform potential effects on glycemic control and safety in this population.
Why it matters
Potential benefit: If successful, cadisegliatin could improve blood sugar control for people with Type 1 diabetes using HCL systems when added to insulin therapy.
How similar studies have gone: Prior Phase 2 data in similar settings suggest potential signals, but this approach remains exploratory in the HCL context.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: * Participants \>= 18 years of age * Fasting C-peptide levels \<0.6 ng/ml * Average TIR \< 70% recorded on their personal CGM data collected over the past 7 days prior to Visit 1 * Currently on a hybrid closed loop device for at least 3 months and willing to stay on the same model of pump device for study duration * Willing to wear a study provided CGM for study duration * Total bilirubin ≤2×ULN, ALT and AST ≤3×ULN Key Exclusion Criteria: * Have Type 2 Diabetes Mellitus (DM), monogenic diabetes, maturity-onset diabetes, other unusual or rare forms of DM, or diabetes resulting from a secondary disease. * Have been hospitalized for DKA within 3 months * Have uncontrolled hypothyroidism or hyperthyroidism * Have QTcF interval \> 450 msec for males or \> 470 msec for females * Have a personal or family history of long QT syndrome, Torsades de pointes, or other complex ventricular arrhythmias * Have persistent, uncontrolled hypertension * Have clinically significant cardiovascular or cerebrovascular disease * Have proliferative retinopathy or maculopathy requiring acute treatment * Have a serious concomitant systemic disorder including but not limited to HIV or active Hep B or Hep C * Have been diagnosed and/or treated for malignancy within 3 years * Have used any of the following medications within the specified time periods: any non-insulin anti-diabetic therapies (e.g.SGLT-2 inhibitors, GLP-1 receptor agonists, metformin, sulfonylureas, DPP-4 inhibitors, pramlintide, a-glucosidase inhibitors, or glucose dependent insulinotropic polypeptide agonists) within 30 days, antipsychotic medications (e.g. olanzapine, risperidone, clozapine, quetiapine, and haloperidol) within 30 days, systemic corticosteroids for ≥7 days for a temporary medical condition within 30 days,
Where it's running
-
Paradigm Clinical Research -Modesto
Modesto, California, United States Recruiting -
Paradigm Clinical Research Centers, LLC
San Diego, California, United States Recruiting -
Barbara Davis Center for Diabetes
Aurora, Colorado, United States Recruiting -
Atlanta Diabetes Associates
Atlanta, Georgia, United States Recruiting -
UNC Eastowne Medical Office Building
Chapel Hill, North Carolina, United States Recruiting -
Texas Diabetes & Endocrinology, P.A.
Austin, Texas, United States Recruiting
Study contacts
- Study coordinator: Meaghan Marnell
- Email: clinicaltrials@vtvtherapeutics.com
- Phone: (336) 888-0435
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.