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Updated: May 26, 2026

Induction of Alloantigen-specific Anergy in Human Peripheral Blood Mononuclear Cells by Alloantigen Stimulation with Co-stimulatory Signal Blockade
Published on: March 14, 2011
Therapy for aplastic anemia
1Department of Oncology, Johns Hopkins University, Baltimore, MD 21205, USA. adezern1@jhmi.edu
Abstract:
A 24-year-old man from Ecuador presents to your clinic with dyspnea on exertion, bruising, and petechiae. He is noted to be pancytopenic with ANC 430, hemoglobin 7.4 g/dL (reticulocyte count 0.9%), and platelets 18 000. His BM biopsy is hypocellular for age. Ultimately, he is diagnosed with severe aplastic anemia. He is the only child of 2 South American parents without any matches in the unrelated donor registry, including cord blood. He is red cell- and platelet transfusion-dependent. He has been recommended therapy with antithymocyte globulin and cyclosporine but declined it. He seeks recommendations about new alternatives to this regimen to improve his chance of response.
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