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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 |
Clin Transl Med
September 2025
Bone Marrow Transplantation Center of the First Affiliated Hospital and Center for Stem Cell and Regenerative Medicine, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
Background: Tumour suppressor genes, exemplified by TP53 (encoding the human p53), function as critical guardians against tumourigenesis. Germline TP53-inactivating mutations underlie Li-Fraumeni syndrome, a hereditary cancer predisposition disorder characterised by early-onset pan-tissue malignancies. However, the context-dependent tumour-suppressive mechanisms of p53 remain incompletely elucidated.
View Article and Find Full Text PDFVaccines (Basel)
August 2025
Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium.
Background: T-cell receptor excision circles (TRECs) and kappa-deleting recombination excision circles (KRECs) are markers of recent thymic and bone marrow output, respectively. As they have previously been associated with immunosenescence, we aimed to investigate their association with anti-spike SARS-CoV-2 (S1RBD) IgG antibody response after COVID-19 vaccination in nursing home residents (NHRs) and staff (NHS).
Methods: We measured TREC and KREC levels and S1RBD IgG antibody levels from dried blood spots (DBSs) using in-house qPCRs and a commercial ELISA kit, respectively, in 200 participants (50 NHRs and 150 NHS).
Radiat Res
August 2025
Departments of Medicine.
Survivors of the hematopoietic acute radiation syndrome (H-ARS) face delayed effects of acute radiation exposure (DEARE), including chronic immune suppression and thymic involution, for which no effective countermeasures exist. We previously demonstrated that 16,16-dimethyl prostaglandin E2 (dmPGE2) enhances H-ARS survival when administered prior to irradiation. Here, we investigated its long-term radiation protective effects on immune reconstitution at 6 and 12 months after exposure in a lethal total-body irradiation (TBI) mouse model.
View Article and Find Full Text PDFEMBO Mol Med
August 2025
Laboratoire d'ImmunoRhumatologie Moléculaire, Plateforme GENOMAX, INSERM UMR_S 1109, Faculté de Médecine, Fédération Hospitalo-Universitaire OMICARE, ITI TRANSPLANTEX NG, Strasbourg Federation of Translational Medicine (FMTS), Strasbourg University, Strasbourg, France.
STING gain-of-function (GOF) mutations cause STING-Associated Vasculopathy with onset in Infancy (SAVI), a severe autoinflammatory disease. Mice carrying STING GOF V154M mutation develop profound T cell lymphopenia, partly due to impaired thymic development. To investigate the mechanisms of peripheral T cell dysfunctions, we analyzed transcriptomic and phenotypic profiles of splenic T cells from these mice.
View Article and Find Full Text PDFAllergy
July 2025
Department of Clinical Microbiology and Immunology, Faculty of Medical and Health Sciences, Tel-Aviv University, Tel-Aviv, Israel.
Rationale: Thymic stromal lymphopoietin (TSLP) and IL-33 are alarmins implicated in eosinophilic esophagitis (EoE) pathogenesis by activating multiple cells, including mast cells (MCs). Whether TSLP or IL-33 have a role in EoE and whether their activities are distinct requires further investigation.
Methods: Experimental EoE was induced in wild type (WT) Il33 and Crlf2 mice.