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Deferasirox treatment improved hematopoiesis and led to complete remission in a patient with pure red cell aplasia.

Int J Hematol

December 2013

Division of Hematology/Oncology, Department of Internal Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1143, Japan,

A 64-year-old woman developed pure red cell aplasia (PRCA) 4 years after thymectomy for thymoma. During anti-thymocyte globulin treatment, the patient developed cytomegalovirus pneumonia and was thus unable to continue immunosuppressive therapy and became transfusion dependent. Deferasirox was started for treatment with iron overload when serum ferritin increased to >1000 ng/mL.

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CD154 blockade, sirolimus, and donor-specific transfusion prevents renal allograft rejection in cynomolgus monkeys despite homeostatic T-cell activation.

Transplantation

May 2007

Transplantation Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA.

Background: CD154-specific antibodies have been shown to prevent acute rejection in many preclinical models including nonhuman primates (NHPs). However, they have been ineffective in pilot clinical trials, suggesting a need for more robust preclinical analysis. One factor affecting the disparate results may be related to the recipient's immune activation state.

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Although first generation recombinant adenoviruses are efficient vehicles for gene transfer, their immunogenicity precludes long-term persistence. We show that adenoviral transgene expression in the liver of normal mice is prolonged from a baseline of less than 2 weeks to 7 weeks by depleting CD4+ T lymphocytes with thymectomy and a 3-day course of anti-CD4 monoclonal antibody or by nonselectively depleting T cells with a single dose of anti-thymocyte serum (ATS). Transgene expression persisted despite the development of an antiviral humoral immune response by 3 weeks after virus administration.

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It has previously been demonstrated that T cell clones with potentials to induce autoimmune thyroiditis exist in lymphoid organs from normal healthy individuals. The present study investigates the nature of regulatory cells co-existing in a normal lymphoid cell population to prevent the activation of these thyroiditis-inducing T cells. T cell-depleted (C57BL/6 x C3H/He) F1 mice (B cell mice) were prepared by adult thymectomy and injection of anti-thymocyte serum, followed by lethal X-irradiation and bone marrow reconstitution.

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