7,359 results found
    1. Immunology and Inflammation

    Atypical memory B-cells are associated with Plasmodium falciparum anemia through anti-phosphatidylserine antibodies

    Juan Rivera-Correa et al.
    The association of atypical memory B-cells and autoimmune antibodies (anti-phosphatidylserine) with hemoglobin levels in malaria patients uncovers a novel mechanism for the human malaria-induced anemia previously identified in mice.
    1. Immunology and Inflammation

    The quantity of CD40 signaling determines the differentiation of B cells into functionally distinct memory cell subsets

    Takuya Koike et al.
    Unveiling a mechanism for the fate decision of B-cell differentiation into two functionally distinct memory B cell subsets.
    1. Immunology and Inflammation

    IgM and IgD B cell receptors differentially respond to endogenous antigens and control B cell fate

    Mark Noviski et al.
    Self-reactive B cells downregulate the IgM but not the IgD B cell receptor, and this serves as a critical tolerance mechanism because IgD is less sensitive to bona fide endogenous antigens than IgM.
    1. Immunology and Inflammation

    B cell activation involves nanoscale receptor reorganizations and inside-out signaling by Syk

    Kathrin Kläsener et al.
    Studying the earliest events in B cell activation reveals that the B cell antigen receptor is opened and activated via the phosphorylation and binding by the spleen tyrosine kinase (Syk).
    1. Cell Biology
    2. Immunology and Inflammation

    B cells extract antigens at Arp2/3-generated actin foci interspersed with linear filaments

    Sophie I Roper et al.
    Two modes of actin polymerization, branched and linear, cooperate in B cells to extract antigens from surfaces of presenting cells.
    1. Cell Biology
    2. Immunology and Inflammation

    Arp2/3 complex-driven spatial patterning of the BCR enhances immune synapse formation, BCR signaling and B cell activation

    Madison Bolger-Munro et al.
    Arp2/3 complex-mediated actin polymerization shapes how B lymphocytes probe the surface of antigen-presenting cells, promotes coalescence of B cell receptor (BCR) microclusters, amplifies BCR signaling, and enhances B cell activation.
    1. Immunology and Inflammation

    B cells suppress medullary granulopoiesis by an extracellular glycosylation-dependent mechanism

    Eric E Irons et al.
    B cells regulate production of neutrophils by a novel mechanism by releasing ST6Gal-1, an active sialyltransferase, that suppresses granulopoiesis.
    1. Immunology and Inflammation
    2. Microbiology and Infectious Disease

    Malaria-associated atypical memory B cells exhibit markedly reduced B cell receptor signaling and effector function

    Silvia Portugal et al.
    Atypical memory B cells (MBCs) appear to differentiate from classical MBCs during chronic exposure to the malaria parasite Plasmodium falciparum, and may interfere with the acquisition of immunity to the disease.
    1. Immunology and Inflammation

    Tuning of in vivo cognate B-T cell interactions by Intersectin 2 is required for effective anti-viral B cell immunity

    Marianne Burbage et al.
    Intersectin2 deficiency is associated with impaired humoral responses to viral infection and B-cell-intrisic defects in germinal centre formation, resulting from the reduced ability of intersectin2-KO B cells to establish cognate interactions with helper T cells.
    1. Immunology and Inflammation

    TLR induces reorganization of the IgM-BCR complex regulating murine B-1 cell responses to infections

    Hannah P Savage et al.
    B-1 cell unresponsiveness to antigen-stimulation is overcome during infections when Toll-like receptor engagement removes negative regulators of B cell receptor signaling, thereby supporting B-1 cell differentiation to IgM-secreting plasmablasts.

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