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The long-term effects of repeated COVID-19 vaccinations on adaptive immunity remain incompletely understood. Here, we conducted a comprehensive three-year longitudinal study examining T cell and antibody responses in 78 vaccinated individuals without reported symptomatic infections. We observed distinct dynamics in Spike-specific humoral and cellular immune responses across multiple vaccine doses.
View Article and Find Full Text PDFImmunosuppressive therapy to treat newly diagnosed primary heart involvement in patients with systemic sclerosis: An Italian cardiac magnetic resonance based study.
Semin Arthritis Rheum
January 2025
Unit of Immunology, Rheumatology, Allergy and Rare diseases, IRCCS San Raffaele Hospital, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy.
Background: Primary heart involvement (pHI) is frequent in systemic sclerosis (SSc), and is associated with a poor prognosis. Therapeutic strategies to treat SSc-pHI are not yet defined.
Objectives: To evaluate the efficacy of immunosuppressive therapy on cardiac magnetic resonance (CMR) features in patients with CMR-proven SSc-pHI.
Nr4a1 and Nr4a3 redundantly control clonal deletion and contribute to an anergy-like transcriptome in auto-reactive thymocytes to impose tolerance in mice.
Nat Commun
January 2025
Division of Rheumatology, Rosalind Russell and Ephraim P. Engleman Arthritis Research Center, Department of Medicine, University of California, San Francisco, CA, 94143, USA.
The Nr4a nuclear hormone receptors are transcriptionally upregulated in response to antigen recognition by the T cell receptor (TCR) in the thymus and are implicated in clonal deletion, but the mechanisms by which they operate are not clear. Moreover, their role in central tolerance is obscured by redundancy among the Nr4a family members and by their reported functions in Treg generation and maintenance. Here we take advantage of competitive bone marrow chimeras and the OT-II/RIPmOVA model to show that Nr4a1 and Nr4a3 are essential for the upregulation of Bcl2l11/BIM and thymic clonal deletion by self-antigen.
View Article and Find Full Text PDFSkin inflammation and lipid disorder induced by topical application of Mal f 1.
Int Immunopharmacol
January 2025
The Second Affiliated Hospital, Guangdong Provincial Key Laboratory of Allergy & Immunology, The State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guangzhou, China. Electronic address:
Objected: Mal f 1, the first allergen cloned from Malassezia furfur, has been found to have positive IgE reactivity in sera from patients with skin inflammation. In vitro, it has also been shown to induce maturation of dendritic cells and release inflammatory factors. However, its role in skin lipid homeostasis remains largely unexplored.
View Article and Find Full Text PDFDeficient neutrophil responses early in influenza infection promote viral replication and pulmonary inflammation.
PLoS Pathog
January 2025
Graduate Program in Immunology, Ann Arbor, Michigan, United States of America.
Neutrophils play key protective roles in influenza infections, yet excessive neutrophilic inflammation is a hallmark of acute lung injury during severe infections. Phenotypic heterogeneity is increasingly recognized in neutrophil populations; however, how functional variation in neutrophils between individuals determine the diverse outcomes of influenza remains unclear. To examine immunologic responses that may drive varying outcomes in influenza, we infected C57BL/6 (B6) and A/J mice with mouse-adapted influenza A virus A/PR/8/34 H1N1.
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