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Advances in diagnosing and managing antibody-mediated rejection

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Abstract

Antibody-mediated rejection (AMR) is a unique, significant, and often severe form of allograft rejection that is not amenable to treatment with standard immunosuppressive medications. Significant advances have occurred in our ability to predict patients at risk for, and to diagnose, AMR. These advances include the development of newer anti-human leukocyte antigen (HLA)-antibody detection techniques and assays for non-HLA antibodies associated with AMR. The pathophysiology of AMR suggests a prime role for antibodies, B cells and plasma cells, but other effector molecules, especially the complement system, point to potential targets that could modify the AMR process. An emerging and potentially larger problem is the development of chronic AMR (CAMR) resulting from de novo donor-specific anti-HLA antibodies (DSA) that emerge more than 100 days posttransplantation. Therapeutic options include: (1) High-dose intravenously administered immunoglobulin (IVIG), which has many potential benefits. (2) The use of IVIG + rituximab (anti-CD20, anti-B cell). (3) The combination of plasmapheresis (PP) + low-dose IVIG with or without rituximab. Data support the efficacy of all of the above approaches. Newer approaches to treating AMR include using the proteosome inhibitor (bortezomib), which induces apoptosis in plasma cells, and eculizumab (anti-C5, anticomplement monoclonal antibody).

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Acknowledgements

This work was supported by The Rebecca Sakai Memorial Fund and The Joyce Jillson Fund for Transplant Research. We also express our gratitude to the entire staff of the Transplant Immunotherapy Program, HLA Laboratory, and Transplant Immunology Laboratory at Cedars-Sinai Medical Center for their hard work and dedication.

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Authors and Affiliations

Authors

Corresponding author

Correspondence to Stanley C. Jordan.

Additional information

Answers

1. d

2. b

3. b

4. b

5. b

6. a

Questions:

Questions:

(Answers appear following the reference list)

  1. 1.

    Which of the following is NOT a characteristic of antibody-mediated rejection (AMR)?

  2. a.

    C4d deposition

  3. b.

    Thrombotic microangiopathy

  4. c.

    DSA detection

  5. d.

    T-cell infiltrates

  6. e.

    Rapid onset of allograft dysfunction

  7. 2.

    The most up to date way for detecting DSA is the use of CDC assays.

    1. a.

      True

    2. b.

      False

  8. 3.

    When dealing with suspected AMR in a highly-HLA sensitized patient, the most important aspect is to wait for biopsy results before initiation of antirejection therapy for AMR.

    1. a.

      True

    2. b.

      False

  9. 4.

    Which of the following would NOT be considered a primary therapy for treatment of AMR?

    1. a.

      Plasmapheresis + low-dose IVIG

    2. b.

      Thymoglobulin

    3. c.

      Rituximab

    4. d.

      High-dose IVIG

    5. e.

      High-dose IVIG + rituximab

  10. 5.

    Chronic allograft nephropathy (CAN) is not mediated by immunologic mechanisms.

    1. a.

      True

    2. b.

      False

  11. 6.

    Newer approaches to preventing and treating AMR include bortezomib and anticomplement therapies.

    1. a.

      True

    2. b.

      False

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Jordan, S.C., Reinsmoen, N., Peng, A. et al. Advances in diagnosing and managing antibody-mediated rejection. Pediatr Nephrol 25, 2035–2048 (2010). https://doi.org/10.1007/s00467-009-1386-4

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  • DOI: https://doi.org/10.1007/s00467-009-1386-4

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