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Distinct features of a peripheral T helper subset that drives the B cell response in dengue virus infection.
Cell Rep
March 2025
Vaccine Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India. Electronic address:
Dengue-virus-induced humoral immunity can increase the risk of severe disease, but the factors influencing this response are poorly understood. Here, we investigate the contribution of CD4 T cells to B cell responses in human dengue infection. We identify a dominant peripheral PD-1 T cell subset that accumulates in severe patients and could induce B cell differentiation via interleukin-21 (IL-21)-related pathway.
View Article and Find Full Text PDFSuppression of NF-κB and downstream XBP1 by DcR3 contributes to a decrease in antibody secretion.
J Immunol
January 2025
Institute of Microbiology and Immunology, National Yang Ming Chiao Tung University, Taipei City, Taiwan.
Decoy receptor 3 (DcR3), a soluble receptor in the tumor necrosis factor receptor superfamily, regulates the functions of monocytes, macrophages, dendritic cells, and T cells. Previous studies have demonstrated that DcR3 suppresses B cell proliferation in vitro and ameliorates autoimmune diseases in animal models; however, whether and how DcR3 regulates antibody production is unclear. Using a DcR3 transgenic mouse model, we found that DcR3 impaired the T cell-dependent antigen-stimulated antibody response.
View Article and Find Full Text PDFCharacterization and comparison of immunity against MPXV for individuals infected with MPXV or vaccinated with modified vaccinia Ankara vaccines.
J Immunol
February 2025
Vaccine Research Institute, Université Paris-Est Créteil, Créteil, France.
The 2022 Mpox virus (MPXV) outbreak revitalized questions about immunity against MPXV and vaccinia-based vaccines (VAC-V), but studies are limited. We analyzed immunity against MPXV in individuals infected with MPXV or vaccinated with the licensed modified vaccinia Ankara (MVA) Bavarian Nordic or an experimental MVA-HIVB vaccine. The frequency of neutralizing antibody responders was higher among MPXV-infected individuals than MVA vaccinees.
View Article and Find Full Text PDFImmune memory in hepatitis E virus: a comparative study of natural infection and vaccination in a nursing home population.
J Immunol
February 2025
Department of Emergency Medicine, Second Affiliated Hospital, Department of Epidemiology and Biostatistics, School of Public Health, The Key Laboratory of Intelligent Preventive Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, 310058, China.
Immune memory is crucial for preventing hepatitis E virus (HEV) infection. Our study aims to investigate immunological memory characteristics and differences between vaccination and natural HEV infection, taking into account that both can induce immune memory. We recruited 60 HEV-infected patients, 58 contingency HEV-vaccinated individuals and 4 controls from an outbreak of hepatitis E in a nursing home between June and August 2023.
View Article and Find Full Text PDFT-bet-expressing B cells promote atherosclerosis in apolipoprotein E-deficient mice.
J Immunol
February 2025
Department of Pathology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
The humoral immune system influences the development of atherosclerosis, but the contributions of specific memory B cell subsets and IgG isotypes are poorly understood. We assessed the relationship between atherosclerosis and age-associated B cells (ABCs), a T-bet-expressing memory B cell subset that is enriched for IgG2c production and implicated in humoral autoimmunity. We found increased numbers of splenic CD11c+ ABCs in 6-mo-old, chow-fed Apoe-/- mice versus C57BL/6 control mice, which were exacerbated by high-fat diet.
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