A Safety, Tolerability, and Efficacy Study of VX-264 in Participants With Type 1 Diabetes
![]() |
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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT05791201 |
Recruitment Status :
Recruiting
First Posted : March 30, 2023
Last Update Posted : November 27, 2023
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Type 1 Diabetes | Drug: VX-264 | Phase 1 Phase 2 |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 17 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | A Phase 1/2 Study to Evaluate the Safety, Tolerability, and Efficacy of VX-264 in Subjects With Type 1 Diabetes Mellitus |
Actual Study Start Date : | May 16, 2023 |
Estimated Primary Completion Date : | May 2026 |
Estimated Study Completion Date : | May 2026 |

Arm | Intervention/treatment |
---|---|
Experimental: VX-264 |
Drug: VX-264
Allogeneic human stem cell-derived islets. |
- Part A and Part B: Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs) [ Time Frame: From Day 1 up to 24 months ]
- Part B and Part C: Change in Peak C-peptide during Mixed-Meal Tolerance Test (MMTT) [ Time Frame: From Baseline and at Day 90 ]
- Part C: Change in peak C-peptide during MMTT [ Time Frame: From Baseline up to 24 months ]
- Part C: Change in Average Total Daily Insulin Dose [ Time Frame: From Baseline up to 24 months ]
- Part C: Proportion of Participants who are Insulin Independent at One Point in Time [ Time Frame: From Day 180 up to Day 365 ]
- Part C: Change in HbA1c values [ Time Frame: From Baseline up to 24 months ]

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 65 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Key Inclusion Criteria:
- Clinical history of T1D with greater than (>) 5 years duration
- Participant is on a stable diabetic treatment
- Consistent use of continuous glucose monitoring (CGM) for at least 4 weeks before Screening and willingness to use CGM for the duration of the study
Key Exclusion Criteria:
- Prior islet cell transplant, organ transplant, or cell therapy
Other protocol defined Inclusion/Exclusion criteria may apply.

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): NCT05791201
Contact: Medical Information | 617-341-6777 | medicalinfo@vrtx.com |
United States, Florida | |
UHealth Diabetes Research Institute | Recruiting |
Miami, Florida, United States, 33136 | |
United States, Illinois | |
University of Chicago | Recruiting |
Chicago, Illinois, United States, 60637 | |
United States, Massachusetts | |
Massachusetts General Hospital | Recruiting |
Boston, Massachusetts, United States, 02114 | |
United States, Pennsylvania | |
Hospital of the University of Pennsylvania | Recruiting |
Philadelphia, Pennsylvania, United States, 19104 | |
University of Pittsburgh Medical Center Montefiore | Recruiting |
Pittsburgh, Pennsylvania, United States, 15213 | |
Canada | |
University of Alberta, Edmonton | Recruiting |
Edmonton, Canada | |
Toronto General Hospital (TGH) | Recruiting |
Toronto, Canada | |
Netherlands | |
Leiden University | Recruiting |
Leiden, Netherlands | |
Switzerland | |
Hopiteaux Universitaires de Geneve | Recruiting |
Geneve, Switzerland | |
United Kingdom | |
Churchill Hospital | Recruiting |
Headington, United Kingdom |
Responsible Party: | Vertex Pharmaceuticals Incorporated |
ClinicalTrials.gov Identifier: | NCT05791201 |
Other Study ID Numbers: |
VX22-264-101 2022-003318-35 ( EudraCT Number ) |
First Posted: | March 30, 2023 Key Record Dates |
Last Update Posted: | November 27, 2023 |
Last Verified: | March 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Plan Description: | Details on Vertex data sharing criteria and process for requesting access can be found at: https://www.vrtx.com/independent-research/clinical-trial-data-sharing |
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 |