Skip to content

Long-Term Safety and Efficacy of Tegoprubart in Kidney Transplant Recipients

AT-1501-K209: BESTOW-EXTENSION: A Phase 2, Multicenter, Open-Label Extension Study to Evaluate the Long-Term Safety and Efficacy of Tegoprubart in Kidney Transplant Recipients

Status
Enrolling by invitation
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06126380
Enrollment
132
Registered
2023-11-13
Start date
2023-10-25
Completion date
2029-12-31
Last updated
2025-12-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Kidney Transplant Rejection

Keywords

Kidney Transplant, AT-1501, Renal Allograft Rejection, Prophylaxis, CD40L Inhibitor, Humanized blocking antibody to CD40L, monoclonal antibody, renal, transplant, ESRD, tegoprubart

Brief summary

This study will evaluate the long term safety and efficacy of AT-1501 (tegoprubart) compared with tacrolimus in patients undergoing kidney transplantation.

Detailed description

This is a multicenter, open-label, active control extension study to assess the long-term safety and efficacy of AT-1501 (tegoprubart) compared with tacrolimus in the preservation of allograft function after kidney transplantation. The number of patients enrolled for OLE study will depend on the enrollment in the Parent studies. To be eligible for participation in this study, participants must have completed a designated Parent study. Participants in this study will continue the treatment regimen they were receiving in the Parent study. Dose regimens will include either AT-1501 (tegoprubart) or tacrolimus.

Interventions

AT-1501 20 mg/kg administered every 3 weeks IV + MMF 1000 mg PO twice daily (BID) or MPS 720 mg PO BID + Corticosteroids 5 mg of prednisone PO once daily (QD) or equivalent

DRUGTacrolimus

Tacrolimus dosed PO BID with the dose titrated to maintain a trough concentration of 6-8 ng/mL+ MMF 1000 mg PO BID or MPS 720 mg PO BID + Corticosteroids 5 mg of prednisone PO QD or equivalent

Sponsors

Eledon Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 100 Years
Healthy volunteers
No

Inclusion criteria

* Successfully completed qualifying Parent study, where entry into the OLE was offered; * Continue to be able to understand the key components of the study as described in the written ICF, and is willing and able to provide written informed consent; * Agree not to participate in another interventional study while on treatment; * If female, is surgically sterile or 2 years postmenopausal. Women of childbearing potential may be enrolled if a pregnancy test is negative at baseline. Women of childbearing potential and men with partners that are of childbearing potential must agree to use highly effective methods of contraception from baseline, through 90 days after the last administration of the study drug. Examples of acceptable methods of contraception are described in Table 6. * If male, agree to use a medically accepted highly effective method of contraception and agree to use this method for 90 days after last administration of the study drug and agree to not donate sperm for 90 days after last administration of the study drug.

Exclusion criteria

* Unwilling or unlikely to comply with the study requirements, in the opinion of the Investigator; * Met any of the stopping criteria or discontinued study drug in the Parent study; * Pregnant or breastfeeding.

Design outcomes

Primary

MeasureTime frameDescription
Safety and Tolerability - Incidence of Treatment Emergent Adverse EventsAssessed from date of enrollment through Month 48Incidence of treatment-emergent serious adverse events (TESAEs), treatment-emergent adverse events (TEAEs), and treatment-emergent AEs of special interest (TEAEoSI).
Safety and Tolerability - Kidney Transplant Medication Side EffectsAssessed from date of enrollment through Month 48Kidney transplant medication side effects using the Modified Transplant Symptom Occurrence and Symptom Distress Scale-59 (MTSOSD) at baseline and 12, 24, 36, and 48 months.

Secondary

MeasureTime frameDescription
The proportion of participants with Graft function impairment at 12, 24, 36, and 48 monthsAssessed from date of enrollment through Month 48A participant is considered to have graft functional impairment if they have an eGFR \<60 mL/min/1.73m\^2.
Proportion of participants with BPAR at 12, 24, 36, and 48 monthsAssessed from date of enrollment through Month 48The Proportion of participants with BPAR at 12, 24, 36, and 48 months.
The proportion of patient and graft survival at 12, 24, 36, and 48 monthsAssessed from date of enrollment through Month 48A participant is considered to have graft functional impairment if they have an eGFR \<60 mL/min/1.73m\^2.
Proportion of composite endpoint (graft failure, BPAR, or death) at 12, 24, 36, and 48 monthsAssessed from date of enrollment through Month 48The Proportion of participants with composite endpoint (graft failure, BPAR, or death) at 12, 24, 36, and 48 months.

Countries

Australia, Brazil, Canada, France, Germany, Spain, United Kingdom, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026