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Kidney TransplantPhase 2NCT00307125

Rituximab in Renal Allograft Recipients Who Develop Early De Novo Anti-HLA Alloantibodies

A Phase 2 study testing Rituximab plus immunosuppression in people with Kidney Transplant and Kidney Transplant Recipient, run by National Institute of Allergy and Infectious Diseases (NIAID) at 17 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to determine whether treatment with rituximab (anti-CD20, Rituxan®, MabThera®) in individuals who develop new anti-HLA antibodies after renal (kidney) transplant will promote longer-term survival of the transplanted kidney.The pilot study compares the use of rituximab (Rituxan®) +… Read more about this study

Who is it for?
Ages 5 to 70 years
What is being tested?
Rituximab plus immunosuppression
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
757 participants
Where
17 sitesUnited States
Study dates
Mar 2006to Dec 2012
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 5 to 70 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Stage 1 Inclusion Criteria for All Participants:

  • Willing to provide informed consent
  • Previously diagnosed end stage renal disease (ESRD)
  • Received kidney transplant within 3 and 36 months of study entry
  • Willing to comply with the study protocol
  • Willing to use acceptable forms of contraception during the study and for 12 months following rituximab/placebo therapy
  • Willing to refrain from breastfeeding during the study and for 12 months following rituximab therapy

Stage 1 Inclusion Criteria for Pediatric Participants (<\=18 Years of Age):

  • Parent or guardian willing to provide informed consent
  • Have received all childhood vaccinations prior to study entry

Stage 2 Inclusion Criteria for Pilot Treatment Study:

  • Three to 39 months post-transplant
  • Developed new antibodies detected at two time points within 1 month between 3 to 36 months post-transplant
  • Negative pregnancy test

Stage 1 Exclusion Criteria for All Participants:

  • Recipient of a kidney from a donor older than 70 years of age
  • Multi-organ transplant
  • History of organ transplantation other than current kidney transplantation
  • Previous treatment with rituximab
  • History of severe allergic reactions to monoclonal antibodies
  • History of allergic reaction to iodine glomerular filtration rate (GFR) assay
  • Lack of intravenous (IV) access
  • Sensitized to greater than 5% Panel Reactive Antibody (PRA) within 12 weeks prior to transplant
  • History of recurrent bacterial or other significant infections
  • Known active bacterial, viral, fungal, mycobacterial, or other infection (including tuberculosis [TB] or atypical mycobacterial disease) or any major episode of infection requiring hospitalization or treatment with IV antibiotics within 4 weeks of study entry. Patients with fungal infections of nail beds are not excluded.
  • HIV infected
  • Surface antigen positive for hepatitis B virus (HBV)
  • Antibody positive for hepatitis C virus (HCV)
  • History of drug, alcohol, or chemical abuse within 6 months prior to study entry
  • History of cancer. Patients with adequately treated in situ cervical carcinoma or adequately treated basal or squamous cell carcinoma of the skin are not excluded.
  • Clinically significant cardiovascular or pulmonary disease
  • Evidence of urinary tract obstruction causing decreased kidney function, unless corrected by study entry
  • Any other disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding that would contraindicate use of an investigational drug, may affect interpretation of study results, or put the patient at high risk for treatment complications
  • History of psychiatric disorder that may interfere with participation in the study
  • History of nonadherence to prescribed regimens
  • Use of other investigational drugs within 4 weeks of study entry
  • Received any licensed or investigational live attenuated vaccine within 2 months of study entry.

Stage 2 Exclusion Criteria for All Participants:

  • Previous treatment with rituximab
  • Immunoglobulin Levels <500mg/dL (Combined IgM, IgG, IgA, IgE, IgD)
  • History of severe allergic reactions to monoclonal antibodies
  • History of cancer. Patients with adequately treated in situ cervical carcinoma or adequately treated basal or squamous cell carcinoma of the skin are not excluded.
  • Active systemic infection at the time of entry into Stage 2
  • Recurrent or de novo glomerular disease or Banff Grade III chronic rejection other than chronic humoral rejection (CHR) indicated in baseline kidney biopsy post-transplant
  • History of post-transplant lymphoproliferative disease (PTLD)
  • Serum creatinine of 3.0 mg/dl or greater OR GFR less than 25 ml/min at the time of entry into Stage 2
  • Hemoglobin less than 8.5 g/dl
  • Platelets less than 80,000 cells/mm^3
  • White blood cell count less than 3,000 cells/mm^3
  • AST or ALT 2.5 times the upper limit of normal at study entry
  • Pregnant or breast-feeding
  • Absolute neutrophil count less than 1000/mm^3

Stage 2 Exclusion Criteria for Pediatric Participants (<\=18 Years of Age):

  • Positive test for parvovirus (B19) by PCR in the blood.

Trial locations and contacts

17 sites in 1 country.

17 sites in 1 country

United States17 sites

  • University of Maryland

    Baltimore, Maryland, 21201

  • University of Alabama, Pediatric Nephrology

    Birmingham, Alabama, 35294

  • University of Alabama

    Birmingham, Alabama, 35294

  • Massachusetts General Hospital

    Boston, Massachusetts, 02114

  • Brigham and Women's Hospital

    Boston, Massachusetts, 02115

  • Children's Hospital Boston

    Boston, Massachusetts, 02115

  • Beth Israel Deaconess Medical Center

    Boston, Massachusetts, 02215

  • University of Illinois

    Chicago, Illinois, 60607

  • Northwestern University

    Chicago, Illinois, 60611

  • University of Florida

    Gainesville, Florida, 32601

  • The Methodist Hospital

    Houston, Texas, 77030

  • Saint Barnabas Medical Center

    Livingston, New Jersey, 07039

  • Children's Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19104

  • Legacy Transplant Services

    Portland, Oregon, 97210

  • Oregon Health Science University

    Portland, Oregon, 97219

  • University of California, San Francisco

    San Francisco, California, 94143

  • Children's Hospital and Regional Medical Center

    Seattle, Washington, 98105

Other trials in United States

About this study

Official title: B-Cell Depletion by Anti-CD20 (Rituximab) in Renal Allograft Recipients Who Develop Early De Novo Anti-HLA Alloantibodies Will Result in Inhibition of Alloantibody Production and Attenuation of Chronic Humoral Rejection

The purpose of this study is to determine whether treatment with rituximab (anti-CD20, Rituxan®, MabThera®) in individuals who develop new anti-HLA antibodies after renal (kidney) transplant will promote longer-term survival of the transplanted kidney.The pilot study compares the use of rituximab (Rituxan®) + site-specific standard immunosuppression to placebo + site-specific standard immunosuppression in the treatment of circulating anti-HLA antibodies in subjects who develop de novo anti-HLA antibodies between 3-36 months after transplant.

Read the detailed description

Organ rejection occurs when a patient's body does not recognize the new organ and attacks it. Data suggest that the development of anti-human leukocyte antigen (HLA) antibodies is an early clinical indication that organ rejection may occur. Rituximab is a genetically engineered monoclonal antibody directed against the CD20 antigen on B cells and is known to deplete B cells when administered intravenously; it is FDA-approved for the treatment of non-Hodgkin's lymphoma; Chronic Lymphocytic Leukemia (CLL); and Rheumatoid Arthritis (RA) in combination with methotrexate in adult patients with moderately-to severely-active RA who have inadequate response to one or more TNF antagonist therapies.

In a previous small study, kidney transplant patients with either acute humoral rejection (AHR) or chronic humoral rejection (CHR) were given rituximab and other antilymphocyte therapy. Patients with AHR had lower or undetectable levels of circulating anti-HLA antibodies after study treatment, and patients with CHR had a sustained decrease of anti-HLA antibodies to undetectable after 6 to 9 months.

This study will evaluate the safety and efficacy of rituximab in 1.)preventing organ rejection and 2.)promoting long-term survival of donor kidneys in people who undergo kidney transplantation.

This study involves two stages:

  1. Stage 1 begins 3 to 36 months after transplant. During Stage 1, blood collection will occur every 3 months for up to 36 months after transplant to test for anti-HLA antibodies. When these antibodies are detected twice within 1 month, the patient will undergo a baseline kidney biopsy and have his or her glomerular filtration rate (GFR) measured to determine kidney function. If a patient meets certain study criteria, he or she will enter Stage 2 (Pilot Treatment Study). If anti-HLA antibodies are not detected in a patient's blood during Stage 1, the patient's participation will be complete.
  2. In Stage 2, patients will receive site-specific standard immunosuppression plus randomization to either rituximab or placebo:
  • Adult dosing (>18 years of age), will receive an intravenous infusion of 1000mg of rituximab on Days 0 and 14.
  • Pediatric dosing (<\= than 18 years of age) will receive an intravenous infusion of 375 mg/m^2/dose (maximum 500 mg/dose) in 4 doses of rituximab on Days 0, 8, 15 and 22.

Adult participants will have 7-9 study visits over 12-24 months. Pediatric participants will have 9-11 study visits over 12-24 months. A physical exam, medication history, adverse events assessment, and blood and urine collection will occur at all visits. A biopsy of the kidney transplant will occur at Stage 2 entry and Month 12.

Note: Prior to January 2010, Stage 2 of this was a double-blind (double-masked) randomized pilot treatment study. As of January 2010 and beyond:

  • subjects were no longer being recruited in the placebo treatment arm
  • all treatment assignments were unblinded and an open-label design commenced; therefore, medication assignments were open to the study participants as well as to the site clinical team.
  • all study subjects who participated in the study prior to this change were informed of the change
  • all subjects who were randomized to the placebo-controlled arm and continued to meet the pilot study eligibility criteria were provided the option to participate in the pilot treatment study.
Being tested
Rituximab plus immunosuppression, Placebo plus immunosuppression
Keywords
Organ Transplantation, Graft function/survival, Immunosuppression, anti-CD20 (rituximab)

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Rituximab plus immunosuppressionDrug

    Also called Rituxan®, MabThera®, anti-CD20

    Genetically engineered monoclonal antibody directed against the CD20 antigen on B cells and is known to deplete B cells when administered intravenously. Generally used in the treatment of non-Hodgkin's lymphoma

    Standard immunosuppression is site-specific.

  • Placebo plus immunosuppressionDrug

    Also called Placebo for rituximab

    Placebo dosing: Adult Dosing (Subjects >18 years): 1000 mg on days 0 and 14; Pediatric Dosing (Subject <\=18 years): 375 mg/m^2/dose (maximum 500 mg/dose) in 4 doses, once per week (Days 0, 8, 15 and 22).

    Standard immunosuppression is site-specific.

Study groups in NCT00307125
Study groupRoleWhat they receive
Pilot Phase-Rituximab plus immunosuppressionExperimentalEnrollment into a Stage 2 pilot treatment study will occur after Stage 1. Adult Rituximab Dosing (Subjects > 18 years): 1000 mg on days 0 and 14; Pediatric Rituximab Dosing (Subjects <\=18 years): 375 mg/m^2/dose (maximum 500 mg/dose) in 4 doses, once per week (Days 0, 8, 15 and 22). Standard immunosuppression is site-specific.
Receives: Drug: Rituximab plus immunosuppression
Pilot Phase-Placebo plus immunosuppressionPlacebo comparatorAdult Placebo Dosing (Subjects >18 years): 1000 mg on days 0 and 14; Pediatric Placebo Dosing (Subject <\=18 years): 375 mg/m^2/dose (maximum 500 mg/dose) in 4 doses, once per week (Days 0, 8, 15 and 22). Standard immunosuppression is site-specific.
Receives: Drug: Placebo plus immunosuppression

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. During Screening Phase: Incidence of Alloantibody Development

    Data were analyzed for 653 participants from the screening phase of the study. This outcome looked at the number of kidney transplant recipients that developed de novo HLA antibodies (anti-HLA Ab) post-transplant. Alloantibody is defined as an antibody produced following the introduction of an alloantigen into the system of an individual lacking that particular antigen. Alloantibodies are important mediators of acute and chronic rejection.

    Measured: During screening window of 3-60 months post kidney transplant

  2. During Screening Phase: Timing of Alloantibody Development

    Data were analyzed for 653 participants from the screening phase of the study. Of these, 79 (12%) developed de novo HLA-antibodies (anti-HLA Ab). This outcome looks at the average length of time (interval) from post kidney transplant until development of alloantibody. Alloantibody is defined as an antibody produced following the introduction of an alloantigen into the system of an individual lacking that particular antigen. Alloantibodies are important mediators of acute and chronic rejection

    Measured: During screening window of 3-60 months post kidney transplant

  3. Number of Participants With 50 Percent (%) Decrease in Circulating Anti-Human Leukocyte Antigen (HLA) Antibodies

    Number of participants with 50% decrease in circulating anti-HLA antibodies at any time within the first 12 months post kidney transplant by LuminexTM Beads Method. Luminex assays for quantitation and detection of cytokine and signal transduction proteins. Presence of circulating antibodies is indicative of the transplant recipient's immune system responding to the transplanted organ as a foreign object or infection.

    Measured: 1 year post treatment initiation

Secondary outcomes (7)

  1. Number of Deaths 12 Months Post Treatment Initiation

    Number of participant deaths within 12 months post treatment initiation

    Measured: 12 months post treatment initiation

  2. Number of Participants Experiencing Graft Loss 12 Months Post Treatment Initiation

    Number of participants with graft loss, defined as the need for dialysis for greater than 30 days duration, allograft nephrectomy, or the decision to withdraw immunosuppression due to graft failure within 12 month post treatment initiation

    Measured: 1 year post treatment initiation

  3. Number of Participants Experiencing Biopsy-proven Post-Transplant Lymphoproliferative Disease (PTLD)

    Number of participants with PTLD within 12 month post treatment initiation. Diagnosis of PTLD was made by B cell proliferation after therapeutic immunosuppression.

    Measured: 1 year post treatment initiation

  4. Number of Participants Experiencing Loss of Peritubular Capillary (PTC) C4d Staining on Kidney Biopsy

    Number of participants with loss of PTC C4d staining on kidney (renal) biopsy within 12 months post treatment initiation. PTC C4d staining on biopsy indicates organ rejection.

    Measured: 1 year post treatment initiation

  5. Number of Participants With Viral Replication of Cytomegalovirus (CMV)

    Number of participants with viral replication of CMV within 12 month post treatment initiation. Measured by polymerase chain reaction (PCR) method. Evidence of viral replication is indicative of active CMV infection.

    Measured: 1 year post treatment initiation

  6. Number of Participants With Evidence of Viral Replication of Epstein-Barr Virus (EBV)

    Number of participants with positive viral replication of EBV within 12 month post treatment initiation. Measured by polymerase chain reaction (PCR) method. Evidence of EBV viral replication is indicative of active infection.

    Measured: 1 year post treatment initiation

  7. Number of Participants With Viral Replication of Polyomavirus (BKV)

    Number of participants with viral replication of BKV within 12 month post treatment initiation. Measured by polymerase chain reaction (PCR) method. Evidence of viral replication is indicative of a BKV infection. Polyomavirus BK is a significant pathogen in transplant recipients.

    Measured: 1 year post treatment initiation

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Mar 2006 (estimated)
  2. Study startMar 2006
  3. Primary completionDec 2012
  4. Study completionDec 2012

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
757 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00307125
Sponsor's protocol ID
DAIT CTOT-02
Other IDs
CCTPT-02
Status last verified
Sep 2026
First submitted
23 Mar 2006
Last updated
24 Sep 2026
Data monitoring committee
Yes

Publications

  • Lee PC, Terasaki PI, Takemoto SK, Lee PH, Hung CJ, Chen YL, Tsai A, Lei HY. All chronic rejection failures of kidney transplants were preceded by the development of HLA antibodies. Transplantation. 2002 Oct 27;74(8):1192-4. doi: 10.1097/00007890-200210270-00025.

    PubMed 12438971

  • Mauiyyedi S, Colvin RB. Humoral rejection in kidney transplantation: new concepts in diagnosis and treatment. Curr Opin Nephrol Hypertens. 2002 Nov;11(6):609-18. doi: 10.1097/00041552-200211000-00007.

    PubMed 12394606

  • Worthington JE, Martin S, Al-Husseini DM, Dyer PA, Johnson RW. Posttransplantation production of donor HLA-specific antibodies as a predictor of renal transplant outcome. Transplantation. 2003 Apr 15;75(7):1034-40. doi: 10.1097/01.TP.0000055833.65192.3B.

    PubMed 12698094

  • Fishman JA, Ikle DN, Wilkinson RA. Discrepant serological assays for Pneumococcus in renal transplant recipients - a prospective study. Transpl Int. 2017 Jul;30(7):689-694. doi: 10.1111/tri.12959. Epub 2017 May 2.

    PubMed 28346714

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Rituximab plus immunosuppression in people with Kidney Transplant and Kidney Transplant Recipient, run by National Institute of Allergy and Infectious Diseases (NIAID) at 17 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 24 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 17 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 23 Mar 2015). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

During Screening Phase: Incidence of Alloantibody Development (time frame: During screening window of 3-60 months post kidney transplant). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00307125, which also lists 4 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 24 Sep 2026; AzTrials last refreshed its copy on 7 Nov 2026.

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