Brief Communication abstract


Nature Medicine 13, 1295 - 1298 (2007)
Published online: 28 October 2007 | doi:10.1038/nm1673

B lymphocyte–directed immunotherapy promotes long-term islet allograft survival in nonhuman primates

Chengyang Liu1,5, Hooman Noorchashm1,5, Jennifer A Sutter2, Mina Naji2, Eline Luning Prak2, Jean Boyer2, Taryn Green1, Michael R Rickels3, John E Tomaszewski2, Brigitte Koeberlein1, Zhonglin Wang1, Michelle E Paessler4, Ergun Velidedeoglu1, Susan Y Rostami1, Ming Yu1, Clyde F Barker1 & Ali Naji1

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We found that an induction immunotherapy regimen consisting of rabbit anti-thymocyte globulin (Thymoglobulin) and the monoclonal antibody to CD20 rituximab (Rituxan) promoted long-term islet allograft survival in cynomolgus macaques maintained on rapamycin monotherapy. B lymphocyte reconstitution after rituximab-mediated depletion was characterized by a preponderance of immature and transitional cells, whose persistence was associated with long-term islet allograft survival. Development of donor-specific alloantibodies was abrogated only in the setting of continued rapamycin monotherapy.

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  1. Department of Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA.
  2. Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA.
  3. Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA.
  4. Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
  5. These authors contributed equally to this work.

Correspondence to: Ali Naji1 e-mail: Ali.Naji@uphs.upenn.edu



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