Inducing Graft Tolerance in HLA Haplotype Matched Related and 3 Ag Matched Unrelated Living Donor Kidney Transplantation

NCT ID: NCT03292445

Last Updated: 2020-07-17

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: EARLY_PHASE1
• Total Enrollment: 24 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-02-14
• Study Completion Date: 2024-02-14

Brief Summary

This research study is to determine if donor blood stem cells given after living, related, HLA antigen (Ag) haplotype match or living, unrelated donor kidney transplantation. Minimal HLA antigen matching will include matching of 2 HLA antigens that can be either HLA A, B, and /or DR. This research will change the immune system such that immunosuppressive drugs can be completely withdrawn or reduced to minimal dose without kidney rejection.

Detailed Description

The objectives of this study are to determine whether patients undergoing kidney transplants for end stage renal disease (ESRD) can be taken off immune suppression drugs given to prevent kidney rejection or can be maintained on low dose immune suppression while maintaining normal kidney function. Patients will receive blood stem cell transfusions from their donors 11 days after transplant to reduce the risk of graft rejection while tapering the post-transplant immune suppression drug regimen. Patients will be treated with total lymphoid irradiation (TLI) and rabbit anti-thymocyte globulin (rATG) followed by transfusion of enriched CD34+ hematopoietic cells containing blood stem cells and CD3+ T cells from their donors in order to induce blood cell mixed chimerism. These chimeric patients produce blood cells from both their own and their donors' blood stem cells. Donors will have blood collected by apheresis after treatment with drugs to "mobilize" blood stem cells from their bone marrow. Collection of the donor's cells will occur 6-8 weeks before kidney donation surgery. After transplant, patients will receive a 14 week course of corticosteroid therapy (e.g., Prednisolone) with gradual dose reduction. They will also receive a 12 month course of mycophenolate mofetil (MMF) with dose tapering beginning 9 months post-transplant and an 18 month course of Tacrolimus with tapering also beginning at 9 months post-transplant. Patients will be monitored for renal function, mixed blood cell chimerism, the appearance of donor specific antibodies (DSA) from their own immune cells reacting to the transplanted kidney, and evidence of rejection in any biopsies of the donor kidney after transplant. Immune suppression drug withdrawal will begin and continue as long as mixed chimerism is maintained, the patient shows no evidence of graft versus host disease (GVHD), the transplanted kidney functions well, and there is no indication of kidney rejection in biopsies. Patients not meeting these criteria will be maintained on low dose immunosuppressive drug therapy unless more extensive treatments are needed to prevent rejection. Potential candidates need to be approved for kidney transplant under this protocol and available for close follow-up post-transplant. This study, sponsored by the California Institute for Regenerative Medicine (CIRM), is being conducted in parallel with NCT01165762 sponsored by the National Institutes of Health with distinct reporting and separation of funding support for the patients enrolled under each sponsor.

Conditions

Immune Tolerance

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Immune tolerance after kidney transplant

Immune tolerance after kidney transplant will be induced by transfusion of enriched donor blood stem cells and T cells to initiate blood cell mixed chimerism in patients conditioned with total lymphoid irradiation and rabbit anti-thymocyte globulin after kidney transplant. Patients will receive corticosteroids for 14 weeks with gradual dose reduction. They will also receive 12 months of mycophenolate mofetil and 18 months of tacrolimus with dose tapering beginning 9 months post-transplant and continuing as long as mixed chimerism is maintained and there is no evidence of graft versus host disease and no kidney rejection evident. Patients losing chimerism will continue on low dose immunosuppressive drug doses unless additional kidney rejection therapy is needed.

Group Type: EXPERIMENTAL

Immune tolerance after kidney transplant

Intervention Type: PROCEDURE

Induction of immune tolerance after kidney and hematopoietic cell transplantation with a conditioning regimen of total lymphoid irradiation and anti-thymocyte globulin followed by immunosuppressive drugs for 18 months. Immunosuppressive drugs are stopped if stable chimerism is achieved and there is no kidney rejection.

Donor blood stem cells and T cells

Intervention Type: DRUG

Immune tolerance after kidney transplantation resulting from mixed blood cells chimerism will be induced by donor blood stem cells and T cells given to the kidney recipient. Donor cells will be collected by apheresis after "mobilization" of blood stem cells from bone marrow 6-8 weeks before kidney transplant. Collected cells will undergo CD34 selection to recover \>10 million donor blood stem cells/kg of patient weight to be combined with up to 150 million donor T cells/kg for transfusion soon after kidney transplant. The IND for this study covers the infusion of donor blood stem cells.

Interventions

Immune tolerance after kidney transplant

Induction of immune tolerance after kidney and hematopoietic cell transplantation with a conditioning regimen of total lymphoid irradiation and anti-thymocyte globulin followed by immunosuppressive drugs for 18 months. Immunosuppressive drugs are stopped if stable chimerism is achieved and there is no kidney rejection.

Intervention Type: PROCEDURE

Donor blood stem cells and T cells

Immune tolerance after kidney transplantation resulting from mixed blood cells chimerism will be induced by donor blood stem cells and T cells given to the kidney recipient. Donor cells will be collected by apheresis after "mobilization" of blood stem cells from bone marrow 6-8 weeks before kidney transplant. Collected cells will undergo CD34 selection to recover \>10 million donor blood stem cells/kg of patient weight to be combined with up to 150 million donor T cells/kg for transfusion soon after kidney transplant. The IND for this study covers the infusion of donor blood stem cells.

Intervention Type: DRUG

Other Intervention Names

Immune tolerance after kidney transplant

Eligibility Criteria

Inclusion Criteria

1. All consenting adults (18 years of age) living donor renal transplant recipients at Stanford University Medical Center who have a one haplotype match donor.

2. Patients who agree to participate in the study and sign an Informed Consent.

3. Patients who have no known contraindication to administration of rabbit ATG or radiation.

4. Males and females of reproductive potential who agree to practice a reliable form of contraception for at least 24 months posttranplant.

Exclusion Criteria

1. Previous treatment with rabbit ATG or known allergy to rabbit proteins.

2. History of malignancy with the exception of non-melanoma skin malignancies.

3. Pregnant women or nursing mothers.

4. Serological evidence of HIV, Hepatitis B or Hepatitis C infection.

5. Seronegative for Epstein-Barr virus , if donor is seropositive.

6. Leukopenia (with a white blood cell count < 3000/mm3) or thrombocytopenia (with a platelet count < 100,000/mm3)

7. Panel Reactive antibody greater then 20% or demonstration of donor specific antibody (DSA).

8. Prior organ transplantation.

9. High risk of primary kidney disease recurrence (i.e. primary FSGS).

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

California Institute for Regenerative Medicine (CIRM)

OTHER

Sponsor Role: collaborator

Samuel Strober

OTHER

Sponsor Role: lead

Responsible Party

Samuel Strober

Professor of Medicine

Responsibility Role: SPONSOR_INVESTIGATOR

Principal Investigators

Samuel Md Strober, MD

Role: STUDY_CHAIR

Stanford University

Locations

Stanford University Medical Center

Palo Alto, California, United States

Site Status: RECRUITING

University of Wisconsin

Madison, Wisconsin, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Asha Shori, CCRP

Role: CONTACT

ashas@stanford.edu

6507360245

Stephan Busque, MD,MS

Role: CONTACT

sbusque@stanford.edu

650-498-6189

Facility Contacts

Asha Shori, CCRP

Role: primary

ashas@stanford.edu

650-736-0245

Stephan Busque, MD, MS

Role: backup

sbusque@stanford.edu

650-498-6189

Dixon Kaufman, MD

Role: primary

kaufman@surgery.wisc.edu

608-265-6471

Tommy Boland

Role: backup

bolandt@suregery.wisc.edu

608-263-9459

References

Scandling JD, Busque S, Shizuru JA, Engleman EG, Strober S. Induced immune tolerance for kidney transplantation. N Engl J Med. 2011 Oct 6;365(14):1359-60. doi: 10.1056/NEJMc1107841. No abstract available.

Reference Type: BACKGROUND

PMID: 21991976 (View on PubMed)

Scandling JD, Busque S, Dejbakhsh-Jones S, Benike C, Sarwal M, Millan MT, Shizuru JA, Lowsky R, Engleman EG, Strober S. Tolerance and withdrawal of immunosuppressive drugs in patients given kidney and hematopoietic cell transplants. Am J Transplant. 2012 May;12(5):1133-45. doi: 10.1111/j.1600-6143.2012.03992.x. Epub 2012 Mar 8.

Reference Type: BACKGROUND

PMID: 22405058 (View on PubMed)

Scandling JD, Busque S, Shizuru JA, Lowsky R, Hoppe R, Dejbakhsh-Jones S, Jensen K, Shori A, Strober JA, Lavori P, Turnbull BB, Engleman EG, Strober S. Chimerism, graft survival, and withdrawal of immunosuppressive drugs in HLA matched and mismatched patients after living donor kidney and hematopoietic cell transplantation. Am J Transplant. 2015 Mar;15(3):695-704. doi: 10.1111/ajt.13091.

Reference Type: BACKGROUND

PMID: 25693475 (View on PubMed)

Scandling JD, Busque S, Dejbakhsh-Jones S, Benike C, Millan MT, Shizuru JA, Hoppe RT, Lowsky R, Engleman EG, Strober S. Tolerance and chimerism after renal and hematopoietic-cell transplantation. N Engl J Med. 2008 Jan 24;358(4):362-8. doi: 10.1056/NEJMoa074191.

Reference Type: RESULT

PMID: 18216356 (View on PubMed)

Other Identifiers

40442

Identifier Type: -

Identifier Source: org_study_id