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New antibody drug could open door to kidney transplants for Hard-to-Match patients

NCT ID NCT05092347

Disease control Sponsor: Regeneron Pharmaceuticals Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests a drug called vonsetamig in 43 people with chronic kidney disease who are on dialysis and have very high levels of anti-HLA antibodies, making it nearly impossible to find a matching kidney donor. The drug aims to safely lower these antibodies so that a kidney transplant becomes possible. Researchers are also monitoring side effects and how the drug works in the body.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

43 people

The number who actually took part.

Started

Aug 2022

Expected to finish

Nov 2027

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 70 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Key Inclusion Criteria: 1. Has Chronic Kidney Disease (CKD) requiring hemodialysis, and awaiting kidney transplant on the United Network for Organ Sharing (UNOS), with a cPRA ≥99.9%, or those with a cPRA \>98% (98.1% to 99.8%) who have spent 5 years or longer on the waitlist, as defined in the protocol 2. Adequate hematologic and adequate hepatic function as defined in the protocol 3. Willing and able to comply with clinic visits and study-related procedures Key Exclusion Criteria: 1. Current or active malignancy not in remission for at least 1 year 2. Central nervous system (CNS) pathology or history of CNS neurodegenerative or movement disorders 3. Patients who have had their spleen removed, including patients with functional asplenia 4. Patients who have received a stem cell transplantation within 5 years 5. Use of investigational agents within 8 weeks or 5 half-lives of study drug administration (whichever is larger) 6. Total plasma IgG \<300 mg/dL at screening 7. Continuous systemic corticosteroid treatment with more than 10 mg per day of prednisone (or anti-inflammatory equivalent) within 72 hours of start of study drug administration 8. Received a calcineurin inhibitor (eg, tacrolimus, cyclosporine) within 30 days of study drug administration 9. Received cyclophosphamide, rituximab, obinutuzumab, other anti-CD20 or B cell-depleting agents, or proteasome inhibitors or anti-CD38 therapies (eg, isatuximab, daratumumab) within 12 months of study drug administration 10. Prior treatment with any anti-BCMA antibody (including antibody drug conjugate or bsAb) or BCMA-directed CAR-T cell therapy, as described in the protocol 11. Has received a COVID-19 vaccination, as described in the protocol Note: Other protocol defined inclusion / exclusion criteria apply

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Conditions

The condition(s) this trial relates to.

chronic kidney disease chronic renal failure syndrome

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Chronic kidney disease (CKD)

Contacts and locations

Locations

  • Cedars-Sinai Medical Center

    Los Angeles, California, 90048, United States

  • Comprehensive Transplant Center

    Chicago, Illinois, 60611, United States

  • Connie Frank Transplant Center at UCSF

    San Francisco, California, 94143, United States

  • John Hopkins Hospital

    Baltimore, Maryland, 21224, United States

  • Medstar Georgetown Transplant Institute - 2-PHC

    Washington D.C., District of Columbia, 20007, United States

  • New York University Langone Health

    New York, New York, 10016, United States

  • Penn Transplant Institute

    Philadelphia, Pennsylvania, 19104, United States

  • University of California Irvine

    Orange, California, 92868, United States

  • University of Minnesota

    Minneapolis, Minnesota, 55455, United States

  • Yale University of Medicine

    New Haven, Connecticut, 06520, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.