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RIF1 integrates DNA repair and transcriptional requirements during the establishment of humoral immune responses.
Nat Commun
January 2025
Laboratory of Genome Diversification & Integrity, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany.
The establishment of protective immune responses relies on the ability of terminally differentiated B cells to secrete a broad variety of antigen-specific antibodies with different effector functions. RIF1 is a multifunctional protein that promotes antibody isotype diversification via its DNA end protection activity during class switch recombination. In this study, we showed that RIF1 ablation resulted in increased plasmablast formation ex vivo and enhanced terminal differentiation into plasma cells upon immunization.
View Article and Find Full Text PDFReduced expression of programmed cell death protein 1 on peripheral regulatory B cells in pre-eclampsia - Signs of impaired immune suppression.
J Reprod Immunol
January 2025
Department of Clinical Biochemistry, Centre for Immune Regulation and Reproductive Immunology (CIRRI), Zealand University Hospital, Sygehusvej 10, Roskilde DK-4000, Denmark; Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, Copenhagen DK-2200, Denmark; The ReproHealth Research Consortium, Zealand University Hospital, Sygehusvej 10, Roskilde DK-4000, Denmark. Electronic address:
Immunological changes are believed to be a part of pre-eclampsia etiology. This study investigated the distribution of the specific peripheral B lymphocyte phenotypes in pre-eclampsia cases compared to uncomplicated pregnancies. The study cohort included 29 women with pre-eclampsia and 14 women with uncomplicated pregnancies.
View Article and Find Full Text PDFIncreased Phosphorylation of Intracellular Signaling Molecules Indicates Continuous Activation of Human Autoreactive B-Cells.
Eur J Immunol
January 2025
Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.
Many human autoimmune diseases (AIDs) are hallmarked by the presence and persistence of autoreactive B-cells. While autoreactive B-cells may frequently encounter antigens, the signals required to balance and maintain their activation and survival are mostly unknown. Understanding such signals may be important for strategies aimed at eliminating human B-cell autoreactivity.
View Article and Find Full Text PDFB cells enhance IL-1 beta driven invasiveness in triple negative breast cancer.
Sci Rep
January 2025
Cawley Center for Translational Cancer Research, Helen F. Graham Cancer Center and Research Institute Christiana Care Health Services, Inc., 4701 Ogletown Stanton Rd Suite 4300, Newark, DE, 19713, USA.
Triple-negative breast cancer (TNBC) is an aggressive subtype often characterized by high lymphocyte infiltration, including tumor-infiltrating B cells (TIBs). These cells are present even in early stages of TNBC and associated with microinvasion. This study shows that co-culturing TNBC cells with B cells increases Interleukin-1β (IL-1β) expression and secretion.
View Article and Find Full Text PDFIdentification of TRAPPC4 as a Key Autoantigen in Immune-Related Pancytopenia: Epitope Characterization and Immune Activation Mechanisms.
Turk J Haematol
January 2025
Tianjin Medical University General Hospital, Department of Hematology, Tianjin, P. R. China.
Objective: Immune-related pancytopenia (IRP) is characterized by autoantibody-mediated destruction or suppression of bone marrow cells, leading to pancytopenia. This study aimed to explore the role of TRAPPC4 (trafficking protein particle complex subunit 4) as a key autoantigen in IRP, including epitope identification and immune activation mechanisms.
Methods: A total of 90 participants were included in the study, divided into four groups: 30 newly diagnosed IRP patients, 25 IRP remission patients, 20 patients with control hematologic conditions (severe aplastic anemia [SAA] and myelodysplastic syndrome [MDS]), and 15 healthy controls.
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