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Batista, Schief and colleagues use a series of germline-targeting immunogens in knock-in mice expressing heavy chain sequences derived from the HIV broadly neutralizing antibody 10E8 to characterize the requirements of 10E8 B cell precursors for entry and maturation in the germinal center.
Schief and colleagues show that germline-targeting epitope scaffolds can elicit responses from rare broadly neutralizing antibody precursor B cells with predefined binding specificities and genetic features.
Jacobsen and colleagues elucidate the nonhierarchical relationship between two types of stem cells: Vwf− hematopoietic stem cells that stably replenish all blood cell lineages without a platelet bias, and Vwf+ stem cells that replenish almost exclusively platelets, and demonstrate that the two types utilize cellularly and molecularly distinct progenitor trajectories for replenishment of platelets.
Chronic antigen exposure promotes terminal exhaustion of T cells. Here the authors show a role for TCR stimulation in preserving progenitor exhausted T cells and highlight their TCR-dependent self-renewal during antitumor responses.
Sestan et al. find a conserved mechanism during systemic viral infection in which γδ T cells produce IFNγ to increase pancreatic insulin secretion, lowering blood glucose and then enhancing type I interferon-mediated protection against viral infection.
Segal and colleagues identify a population of immature neutrophils as having regenerative properties on injured neurons and being capable of inducing axon regeneration. These findings suggest potential strategies for restoring lost neurological functions in central nervous system disorders.
Woolf and colleagues use single-cell transcriptomics to determine the gene signature of infiltrating immune cells and potential cell–cell interactions between receptors, ligands, ion channels and metabolites expressed on immune cells and sensory neurons in three models of pain.
Here the authors identify and characterize the development and function of an IFN-γ-producing CD8αβ+ subset of γδ T cells that contributes to malignancy.
CAR T cells have shown great promise in treating some cancers and are now being applied to other diseases. Here the authors engineer mouse and human T cells and show that a single infusion can result in lasting remission from asthma in mice.
Cancer and aging are associated with each other, but underlying mechanisms contributing to this correlation are unclear. Here the authors identify a dysfunctional T cell state that is distinct from typical T cell exhaustion and only occurs in the tumor microenvironment during later life.
In this Resource paper, the authors integrate T cell antigen receptor, B cell antigen receptor and exome sequencing comparing early and metastatic breast cancer in humans, showing how the immune response and tumors coevolve.
Jakubzick and colleagues show that interstitial macrophages across various tissues display similar coordinated chemokine signatures in humans and mice.
Singh and colleagues show Tigit controls the generation of germinal center-derived plasma cell precursors that give rise to long-lived differentiated progeny in the bone marrow.
Here the authors show that sepsis and its resolution alter cancer susceptibility by epigenetically altering resident macrophages resulting in retention of T cells that increase antitumoral immunity.
In this study, the authors suggest that in the lung ApoE is a checkpoint for monocyte-to-macrophage differentiation triggered by the dectin1–Card9 pathway.
Here the authors show that a heteropolysaccharide from a commensal bacteria commonly found in the Korean food kimchi is able to bolster antitumor immune responses by instructing tumor-associated macrophages to release lipocalin-2, which sequesters iron away from tumor cells contributing to the immune response to attack these cells.
Bock and colleagues perform integrative analysis of JAK-STAT mutant mice and find JAK-STAT signaling regulates CD8+ T cell and macrophage homeostasis by contributing to a poised epigenetic and transcription-regulatory state, preparing cells to rapidly respond to stimuli.
Here the authors show how the liver affects the immune response to pancreatic ductal adenocarcinoma and that cancer immunity and survival outcomes after surgery might be bolstered by therapeutic intervention on hepatocyte release of serum amyloid A proteins.
Koh et al. show that loci active in differentiated effector T cells are poised in early T precursors before the expression of T cell antigen receptors in a manner dependent on the chromatin remodeling complex mammalian SWItch/Sucrose Non-Fermentable and the PU.1–RUNX1 and BCL11B–RUNX1 complexes.