Thymic and bone marrow outputs were evaluated in 13 sequential samples of 68 multiple sclerosis patients who initiated alemtuzumab and were clinically followed for 48 months. Three months after alemtuzumab infusions, the levels of new T lymphocytes were significantly reduced, but progressively increased reaching the highest values at 36 months, indicating the remarkable capacity of thymic function recovery. Newly produced B cells exceeded baseline levels as early as 3 months after alemtuzumab initiation. Heterogeneous patterns of new T- and B-cell recovery were identified, but without associations with age, sex, previous therapies, development of secondary autoimmunity or infections, and disease re-emergence. Trial registration version 2.0-27/01/2016.
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http://dx.doi.org/10.1016/j.jneuroim.2023.578170 | DOI Listing |
JTO Clin Res Rep
January 2025
Department of Medical Oncology, University Hospital Basel, Basel, Switzerland.
Introduction: SCLC is characterized by aggressiveness and limited treatment options, especially in extensive-stage SCLC (ES-SCLC). Immunotherapy added to the platinum-etoposide combination has recently become standard in this setting. This retrospective study aims to evaluate the real-world effectiveness of chemo-immunotherapy in patients with ES-SCLC, focusing on subpopulations excluded from clinical trials.
View Article and Find Full Text PDFTransplantation
January 2025
Department of Surgery, Center for Transplantation Sciences, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
Background: Long-term renal allograft acceptance has been achieved in macaques using a transient mixed hematopoetic chimerism protocol, but similar regimens have proven unsuccessful in heart allograft recipients unless a kidney transplant was performed simultaneously. Here, we test whether a modified protocol based on targeting CD154, CD2, and CD28 is sufficient to prolong heart allograft acceptance or promote the expansion of regulatory T cells.
Methods: Eight macaques underwent heterotopic allo-heart transplantation from major histocompatibility complex-mismatched donors.
Mediastinum
November 2024
Department of Oncology, Mayo Clinic, Rochester, MN, USA.
Background: Thymoma is a rare mediastinal neoplasm originating from thymic epithelial cells, often associated with paraneoplastic syndromes. These syndromes can manifest as a range of autoimmune disorders, including myasthenia gravis, pure red cell aplasia, and aplastic anemia. Clinical trials involving the use of immune checkpoint inhibitors (ICIs) in thymoma have been complicated by a high incidence of immune-related adverse effects (irAEs).
View Article and Find Full Text PDFMedicine (Baltimore)
December 2024
Hematopoietic Stem Cell Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Background: Immune reconstitution is a significant factor in the success of "hematopoietic stem cell transplantation" (HSCT). Delaying the immune reconstitution increases the risk of infections and relapse after transplantation. T-cell recovery after HSCT is mainly thymus-dependent, and thymic atrophy is associated with various clinical conditions that correlate with HSCT outcomes.
View Article and Find Full Text PDFDev Comp Immunol
January 2025
Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Switzerland.
Knowledge on the structure and composition of the haematopoietic tissue (HT) is essential to understand the basic immune functions of the immune system in any species. For reptiles, it is extremely limited, hence we undertook an in-depth in situ investigation of the HT (bone marrow, thymus, spleen, lymphatic tissue of the alimentary tract) in the common boa (Boa constrictor). We also assessed age- and disease-related changes, with a special focus on Boid Inclusion Body Disease, a highly relevant reptarenavirus-associated disease in boid snakes.
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