Evaluation of TTP399 in Patients With Type 1 Diabetes (SimpliciT1)
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT03335371 |
Recruitment Status :
Completed
First Posted : November 7, 2017
Last Update Posted : November 27, 2020
|
- Study Details
- Tabular View
- Results Submitted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Diabetes Mellitus, Type 1 | Drug: TTP399 Drug: Placebo Oral Tablet | Phase 1 Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 115 participants |
Allocation: | Randomized |
Intervention Model: | Sequential Assignment |
Masking: | Triple (Participant, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Multi-Center, Randomized, Double-Blind, Parallel-Group, Multiple-Dose, Adaptive Study Assessing the Pharmacokinetics, Pharmacodynamics, Safety, and Tolerability of TTP399 in With Adult Patients Type 1 Diabetes Mellitus |
Actual Study Start Date : | October 25, 2017 |
Actual Primary Completion Date : | December 20, 2019 |
Actual Study Completion Date : | January 6, 2020 |

Arm | Intervention/treatment |
---|---|
Experimental: TTP399 400 mg |
Drug: TTP399
Phase 1: Participants will receive TTP399 administered orally up to 1200 mg taken once daily for 7 days Drug: TTP399 Phase 2: Participants will receive TTP399 administered orally 800 mg taken once daily for 12 weeks |
Placebo Comparator: Placebo |
Drug: Placebo Oral Tablet
Phase 2: Participants will receive Placebo oral tablets for 12 weeks |
- Change in HbA1c from baseline at 12 weeks [ Time Frame: Day 1 to Week 12 ]
- Adverse Events [ Time Frame: Week -2 to Week 13 ]
- Time in target glycemic range (70-180 mg/dL) [ Time Frame: Week -2 to Week 12 ]
- Time in hyperglycemic range (Level 1 > 180 mg/dL, Level 2 (>250 mg/dL) [ Time Frame: Week -2 to Week 12 ]
- Time in hypoglycemic range (Level 1 < 70 mg/dL, Level 2 < 54 mg/dL) [ Time Frame: Week -2 to Week 12 ]
- Change from baseline in total daily insulin dose [ Time Frame: Week -2 to Week 12 ]
- Change from baseline of meal time bolus insulin [ Time Frame: Week -2 to Week 12 ]

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years to 70 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- People diagnosed with T1DM, confirmed diagnosis prior to 40 years of age and a diagnosed for minimum of 1 year.
- Type 1 diabetics using either continuous subcutaneous insulin infusion (with lispro or aspart) or multiple daily doses of insulin
- Willing to use adequate contraception
- No major surgeries or significant injuries within the past year and without an active infection.
Exclusion Criteria:
- Diagnosis of T2DM, severely uncontrolled T1DM, maturity-onset diabetes of the young, insulin-requiring T2DM, other unusual or rare forms of diabetes mellitus, diabetes resulting from a secondary disease
- Receipt of an investigational product within 30 days of the Screening Visit or any therapeutic protein or antibody within 90 days prior to Screening Visit or any previous treatment with TTP399.
- Living in the same household or related to another participant in this study.
- Two severe episodes of hypoglycemia that required assistance by a third party within 3 months of Screening Visit
- Use of antidiabetic medications other than insulin 3 months prior to Screening Visit, systemic corticosteroids 1 month prior to Screening Visit, weight loss medication 2 weeks prior to Screening Visit, and antipsychotic medications 3 months prior to Screening Visit.
- Participation in any formal weight loss program or contemplating such therapy during the trial.
- Recent history of use of non-prescribed controlled substances or illicit drugs.
- Current alcoholism or a history of excessive alcohol consumption within 2 years prior to screening
- History or presence of symptomatic autonomic neuropathy or chronic gastrointestinal disease.
- Personal history of long QT syndrome.
- Blood donation of approximately 1 pint (500 mL) within 8 weeks before Screening Visit
- History of hemolytic anemia or chronic transfusion requirement.
- History of cancer, other than non-melanoma skin cancer or uterine cervical cancer that required therapy in the past 5 years.
- Breastfeeding

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03335371
United States, California | |
USC Westside Center for Diabetes | |
Beverly Hills, California, United States, 90211 | |
AMCR Institute | |
Escondido, California, United States, 92025 | |
United States, Colorado | |
University of Colorado Barbara Davis Center | |
Aurora, Colorado, United States, 80045 | |
United States, Georgia | |
Atlanta Diabetes Associate | |
Atlanta, Georgia, United States, 30318 | |
United States, Idaho | |
Rocky Mountain Diabetes Center | |
Idaho Falls, Idaho, United States, 83404 | |
United States, Iowa | |
Iowa Diabetes Research | |
West Des Moines, Iowa, United States, 50265 | |
United States, North Carolina | |
Mountain Diabetes and Endocrine Center | |
Asheville, North Carolina, United States, 28803 | |
UNC Diabetes Care Center | |
Chapel Hill, North Carolina, United States, 27517 | |
Duke University Diabetes Research Clinic | |
Durham, North Carolina, United States, 27710 | |
Diabetes & Endocrinology Consultants | |
Morehead City, North Carolina, United States, 28557 | |
PMG Research of Wilmington | |
Wilmington, North Carolina, United States, 28401 | |
Wake Forest | |
Winston-Salem, North Carolina, United States, 27104 | |
United States, Oklahoma | |
Intend Research | |
Norman, Oklahoma, United States, 73069 | |
United States, Texas | |
Dallas Diabetes Research Center | |
Dallas, Texas, United States, 75230 | |
United States, Washington | |
University of Washington Medicine Diabetes Institute | |
Seattle, Washington, United States, 98109 |
Study Director: | Carmen Valcarce, Ph.D. | vTv Therapeutics, LLC |
Responsible Party: | vTv Therapeutics |
ClinicalTrials.gov Identifier: | NCT03335371 |
Other Study ID Numbers: |
TTP399-203 JDRF#2-IND-2018-500 ( Other Identifier: JDRF International ) |
First Posted: | November 7, 2017 Key Record Dates |
Last Update Posted: | November 27, 2020 |
Last Verified: | November 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Diabetes Mellitus Diabetes Mellitus, Type 1 Glucose Metabolism Disorders Metabolic Diseases |
Endocrine System Diseases Autoimmune Diseases Immune System Diseases |