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Cadisegliatin as Adjunctive Therapy to Insulin in Participants With Type 1 Diabetes Who Are Using Hybrid Closed Loop (HCL) Systems (Hybrid CATT1)

22. mai 2026 oppdatert av: vTv Therapeutics

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

TTP399-206 is a Phase 2a multicenter double blind cross over randomized study of cadisegliatin in participants with T1D using hybrid closed loop systems to manager their diabetes. Patients using a hybrid closed loop insulin pump to manage their diabetes will be randomized to either receive blinded cadisegliatin 800 mg QD as an adjunctive therapy to their insulin treatment or placebo QD along with their insulin treatment. The trial begins with a screening period of up to 2 weeks, followed by a device training and insulin adjustment period of 1-2 weeks leading into the first double-blind treatment period of 6 weeks. There will then be a washout period of 1-2 weeks followed by the second double-blind treatment period of 6 weeks where the patient will cross-over to the treatment arm that they did not receive in the first treatment period.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

TTP399-206 is a 20 week, Phase 2a trial designed to evaluate efficacy and safety of cadisegliatin in participants with T1D who are using hybrid closed loop (HCL) systems to manage their condition to gather preliminary data to understand how cadisegliatin performs in an HCL setting.

Studietype

Intervensjonell

Registrering (Antatt)

40

Fase

  • Fase 2

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

  • Forente stater
    • Georgia
      • Atlanta, Georgia, Forente stater, 30318
        • Atlanta Diabetes Associates
        • Hovedetterforsker:
          • Bruce W Bode, MD

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Beskrivelse

Key Inclusion Criteria:

  • Participants >= 18 years of age
  • Fasting plasma C-peptide levels <0.6 ng/ml
  • Average TIR < 70% at the end of the screening period
  • 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
  • Capable of participating in a 30-minute lasting exercise test

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 incliuding but not limited to HIV or active Hep B or Hep C
  • 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,

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Trippel

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Cadisegliatin 800 mg QD: Double Blind, Randomized Crossover Trial Design
If a patient is randomized to receive cadisegliatin 800 mg QD as an adjunctive therapy to their insulin treatment in the first double-blind treatment period of 6 weeks, there will then be a washout period of 1-2 weeks followed by the second double-blind treatment period of 6 weeks where the patient will cross-over to the placebo QD along with their insulin treatment arm
Legemiddel: Cadisegliatin 800 mg QD
Cadisegliatin is an orally bioavailable small-molecule glucokinase activator, adjunctive therapy to insulin
Andre navn:
  • TTP399
Placebo komparator: Placebo: Double Blind, Randomized Crossover Trial Design
If a patient is randomized to receive placebo QD along with their insulin treatment in the first double-blind treatment period of 6 weeks, there will then be a washout period of 1-2 weeks followed by the second double-blind treatment period of 6 weeks where the patient will cross-over to the cadisegliatin 800 mg QD as an adjunctive therapy to their insulin treatment arm
Legemiddel: Placebo
Placebo (insulin alene)

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
To assess the change in Time in Range (TIR)
Tidsramme: last 2 weeks of the two 6-week treatment periods
Time in Range (TIR) based on study CGM in participants with T1D who are using hybrid closed loop systems on cadisegliatin vs placebo
last 2 weeks of the two 6-week treatment periods

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
CGM-based metric for glycemic control
Tidsramme: last 2 weeks of the two 6-week treatment periods
Time In Tight Range (TITR)
last 2 weeks of the two 6-week treatment periods
CGM-based metric for glycemic control
Tidsramme: last 2 weeks of the two 6-week treatment periods
Time Above Range (TAR)
last 2 weeks of the two 6-week treatment periods
CGM-based metric for glycemic control
Tidsramme: last 2 weeks of the two 6-week treatment periods
Time Below Range (TBR)
last 2 weeks of the two 6-week treatment periods
CGM-based metric for glycemic control
Tidsramme: last 2 weeks of the two 6-week treatment periods
Glucose Management Indicator (GMI)
last 2 weeks of the two 6-week treatment periods
CGM-based metric for glycemic control
Tidsramme: last 2 weeks of the two 6-week treatment periods
Glucose variability (GV)
last 2 weeks of the two 6-week treatment periods
CGM-based metric for glycemic control
Tidsramme: last 2 weeks of the two 6-week treatment periods
Time in Range (TIR) > 70%
last 2 weeks of the two 6-week treatment periods
Change in glucose control after standardized mixed meal tolerance test (MMTT)
Tidsramme: 12 weeks
Glucose Peak Plasma Concentration (Cmax) based on study CGM after standardized mixed meal tolerance test (MMTT)
12 weeks
Change in glucose control after standardized mixed meal tolerance test (MMTT)
Tidsramme: 12 weeks
Glucose Area under the plasma concentration versus time curve (AUC) based on study CGM after standardized mixed meal tolerance test (MMTT)
12 weeks
Change in glucose control after a standardized exercise test
Tidsramme: 12 weeks
Glucose Peak Plasma Concentration (Cmax) based on study CGM after a standardized exercise test
12 weeks
Change in glucose control after a standardized exercise test
Tidsramme: 12 weeks
Glucose Minimum Plasma Concentration (Cmin) based on study CGM after a standardized exercise test
12 weeks
Change in glucose control after a standardized exercise test
Tidsramme: 12 weeks
Glucose Area under the plasma concentration versus time curve (AUC) based on study CGM after a standardized exercise test
12 weeks
To assess the change in Level 1, Level 2 , and Level 3 hypoglycemic incidence
Tidsramme: 12 weeks
Number of events of Level 1, Level 2, and Level 3 hypoglycemia as determined by CGM and adjudicated level 3 hypoglycemic events per patient year in participants with T1D who are using hybrid closed loop systems on cadisegliatin vs placebo
12 weeks
Assess incidence of Serious Adverse Events (SAEs)
Tidsramme: 14 weeks
Number of Serious Adverse Events (SAEs)
14 weeks
Assess incidence of Treatment Emergent Adverse Events (TEAEs)
Tidsramme: 14 weeks
Number of treatment emergent adverse events (TEAEs)
14 weeks
Assess incidence of Treatment Emergent Adverse Events (TEAEs) leading to discontinuation
Tidsramme: 14 weeks
Number of treatment emergent adverse events (TEAEs) leading to discontinuation of study drug
14 weeks
Assess incidence of Adverse Events of Special Interest (AESIs)
Tidsramme: 14 weeks
Number of adverse events of special interest (AESIs)
14 weeks
Change from baseline in average daily total insulin dose
Tidsramme: last week of the two 6-week treatment periods
Change from baseline in average daily total insulin dose in units (IU) based on manual entry in eDiary records from participants with T1D who are using hybrid closed loop systems on cadisegliatin vs placebo
last week of the two 6-week treatment periods

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

vTv Therapeutics

Etterforskere

  • Studieleder: Thomas Strack, MD, vTv Therapeutics LLC

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

1. juli 2026

Primær fullføring (Antatt)

1. april 2027

Studiet fullført (Antatt)

1. mai 2027

Datoer for studieregistrering

Først innsendt

15. mai 2026

Først innsendt som oppfylte QC-kriteriene

22. mai 2026

Først lagt ut (Faktiske)

1. juni 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

1. juni 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

22. mai 2026

Sist bekreftet

1. mai 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • TTP399-206

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Studerer et amerikansk FDA-regulert medikamentprodukt

Ja

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Nei

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