A Safety, Tolerability, and Efficacy Study of VX-880 in Participants With Type 1 Diabetes
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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: NCT04786262 |
Recruitment Status :
Recruiting
First Posted : March 8, 2021
Last Update Posted : October 31, 2023
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Diabetes Mellitus, Type 1 Impaired Hypoglycemic Awareness Severe Hypoglycemia | Biological: VX-880 | 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-880 in Subjects Who Have Type 1 Diabetes Mellitus With Impaired Hypoglycemic Awareness and Severe Hypoglycemia |
Actual Study Start Date : | March 29, 2021 |
Estimated Primary Completion Date : | January 2024 |
Estimated Study Completion Date : | January 2028 |

Arm | Intervention/treatment |
---|---|
Experimental: VX-880 |
Biological: VX-880
Infused into the hepatic portal vein.
Other Name: Formerly known as STx-02 |
- Safety and Tolerability as Assessed by Number of Participants With Adverse Events (AEs) and Serious Adverse Events (SAEs) [ Time Frame: From VX-880 infusion to end of study (up to 5 years) ]
- Proportion of Participants Free of Severe Hypoglycemic Events With Either a Glycosylated Hemoglobin (HbA1c) <7.0% or a ≥ 1% Reduction in HbA1c From Baseline [ Time Frame: At 1 year after VX-880 infusion ]
- Proportion of Participants who are Insulin Independent [ Time Frame: At 1 year after VX-880 infusion ]
- Changes in Stimulated C-peptide [ Time Frame: At 1 year after VX-880 infusion ]

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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 > 5 years of duration
- At least two episodes of documented severe hypoglycemia in the 12 months prior to enrollment
- Stable diabetic treatment
- Consistent use of continuous glucose monitor (CGM) for at least 3 months 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): NCT04786262
Contact: Medical Information | 617-341-6777 | medicalinfo@vrtx.com |

Responsible Party: | Vertex Pharmaceuticals Incorporated |
ClinicalTrials.gov Identifier: | NCT04786262 |
Other Study ID Numbers: |
VX20-880-101 2022-002292-11 ( EudraCT Number ) |
First Posted: | March 8, 2021 Key Record Dates |
Last Update Posted: | October 31, 2023 |
Last Verified: | February 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 Hypoglycemia Glucose Metabolism Disorders |
Metabolic Diseases Endocrine System Diseases Autoimmune Diseases Immune System Diseases |