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vTv Therapeutics Announces First Participant Randomized in Phase 2a Pilot Study Evaluating Cadisegliatin in Individuals with Type 1 Diabetes (T1D) Using Hybrid Closed-Loop (HCL) Insulin Delivery Systems

$VTVTPress releaseOct 27, 2026, 8:00 AM ETRead the release

vTv Therapeutics announced the first participant has been randomized in its Phase 2a Hybrid CATT1 pilot study testing oral cadisegliatin in adults with type 1 diabetes who use hybrid closed-loop insulin delivery systems. The ~40-person, six-week crossover study is designed to complement the already fully enrolled Phase 3 CATT1 trial, which only covered open-loop insulin users, and to inform design of future Phase 3 research in the AID segment.

Key figures

Drug Name
cadisegliatin (TTP399)
Phase Of Trial
Phase 2a
Study design
double-blind, randomized, placebo-controlled, two-way crossover
Primary endpoint
CGM-based measures of glycemic control including Time in Range (TIR)
Aid adoption rate
up to 40% of people with T1D
Us t1d population
2.1 million
Treatment duration
six weeks of treatment
Expected enrollment
approximately 40 adults

AI analysis

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    VTVT: vTv Therapeutics Announces First Participant Randomized in Phase 2a Pilot Study Evaluating Cadisegliatin in Individuals with Type 1 Diabetes (T1D) Using Hybrid Closed-Loop (HCL) Insulin Delivery Systems — AI Analysis | Signal8