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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. maj 2026 opdateret af: 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.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret 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.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

40

Fase

  • Fase 2

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

  • Forenede Stater
    • Georgia
      • Atlanta, Georgia, Forenede Stater, 30318
        • Atlanta Diabetes Associates
        • Ledende efterforsker:
          • Bruce W Bode, MD

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Tredobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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
Medicin: Cadisegliatin 800 mg QD
Cadisegliatin is an orally bioavailable small-molecule glucokinase activator, adjunctive therapy to insulin
Andre navne:
  • 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
Medicin: Placebo
Placebo (insulin alene)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
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
Foranstaltningsbeskrivelse
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

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

vTv Therapeutics

Efterforskere

  • Studieleder: Thomas Strack, MD, vTv Therapeutics LLC

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. juli 2026

Primær færdiggørelse (Anslået)

1. april 2027

Studieafslutning (Anslået)

1. maj 2027

Datoer for studieregistrering

Først indsendt

15. maj 2026

Først indsendt, der opfyldte QC-kriterier

22. maj 2026

Først opslået (Faktiske)

1. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

1. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

22. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • TTP399-206

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