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Found in Translation

Ransohoff discusses why animal models have uniformly failed to predict success in neurodegenerative clinical trials.


IgM leaves the lymph node via the microarchitecture of the fibroblastic reticular cell conduit.

Jameson discusses the generation of a genetic mouse model for the conditional depletion of γδ T cells, confirming the fetal origin and persistence of γδ Th17 cells.

miR21-mediated activation of TLR8 controls neuropathic pain.

Tuveson and Biffi discuss the identification of a subset of BM-derived fibroblasts that promotes cancer angiogenesis and growth.

Cellular nucleic acid–binding protein (Cnbp) regulates IL-12β transcription and IL-12–driven, Th1-mediated immune responses.

Brief Definitive Report

In Special Collection: JEM Immunology Collection 2019

IgM provides early protection against pathogens. How IgM is exported out of lymph nodes remains unknown. Thierry et al. report that B cells utilize a system of paracortical conduits to rapidly export their IgM to the periphery.

Thymic emigration is essential for establishing T cell immunity. We show the requirement for LTβR segregates from its control of medullary epithelium. Instead, our study demonstrates LTβR expression by the endothelium acts to rate limit thymocyte egress via perivascular routes.

In Special Collection: Skin Health and Disease

The adult turnover mechanisms and hematopoietic origin of dendritic epidermal γδ T cells (DETCs) are poorly characterized. Gentek et al. demonstrate that DETCs originate from yolk sac hematopoiesis and clonally self-renew in the adult, akin to epidermal Langerhans cells.


In Special Collection: Skin Health and Disease

The authors present a genetic mouse model for conditional depletion of γδ T cells, confirming the fetal origin and persistence of Tγδ17 cells. They show differential phenotypes after acute depletion versus constitutive γδ T cell deficiency in imiquimod-induced psoriasis.

TLRs are known to be essential for innate and adaptive immunity. Zhang et al. show the involvement of TLR8 and its endogenous ligand miR-21 in neuropathic pain via inducing ERK-dependent proinflammatory mediators’ production and neuronal hyperexcitability in the DRG.

Wang et al. demonstrate that AEP cleaves SRPK2 in tauopathies and plays a functional role in mediating tau-splicing imbalance and accelerating cognitive decline in mouse models of tauopathy.

Lane et al. demonstrate that IFNγ-induced, nonhematopoietic PD-L1 suppresses anti-melanoma immunity and identify lymphatic vessels as key mediators of response. They demonstrate that peripheral lymphatic vessels act as tissue-resident, immunological switches that balance protective immunity and tissue damage in skin.

Raz et al. demonstrate that the expression of PDGFRα distinguishes two functional CAF populations in breast tumors and lung metastases and identify a subpopulation of CAFs that are specifically recruited to the tumor microenvironment from mesenchymal stromal cells in the BM.

In Special Collection: Hematologic malignancies 2019

Mitochondrial apoptotic priming predicts response to cancer chemotherapy, but the mechanisms underlying variability in this mitochondrial phenotype among closely related tumors are poorly understood. Ariës et al. show that PRC2 loss-of-function mutations induce resistance to mitochondrial apoptosis in T-ALL.

Kras-driven non–small-cell-lung cancers (NSCLCs) are a leading cause of death with limited therapeutic options. Serresi et al. show that inhibiting Ezh2 in orthotopic KrasG12D-driven NSCLC unleashes an inflammatory response rewiring tumor progression and amplifying associated vulnerabilities that could be therapeutically exploited.

These studies reveal a previously unrecognized role for Cnbp as a novel transcriptional regulator engaged downstream of innate immune receptors controlling the c-Rel–IL-12–Th1 axis, which has important implications for both host defense and inflammatory disease.

In Special Collection: Inborn Errors of Immunity 2019

Roussel et al. identify the first patient with autosomal recessive deficiency in ICOSLG, the gene encoding the ligand for ICOS. The missense allele impairs cell surface expression of ICOSL, compromises T–B lymphocyte costimulation, and results in combined immunodeficiency.

This study demonstrates a role for the transmembrane regulator of PI3K (TrIP) in restricting early T cell activation, at least in part through effects on PI3K. It is also shown that levels of TrIP decrease preceding full T cell activation.

In Special Collection: Immunometabolism 2019

Zhang et al. report an essential role of the E3 ligase VHL in regulating the metabolic fitness and effector function of alveolar macrophages to prime ILC2 activation through osteopontin during pulmonary type 2 inflammation and fibrosis.

Marié et al. describe a futile cycle between constitutive histone acetyltransferases and deacetylases (HDACs) that regulates interferon-stimulated gene transcription through availability of the epigenetic reader, Brd4. Pharmacologic targeting of the HDAC/Brd4 axis resolves aberrant gene expression associated with genetic susceptibility to autoimmune interferonopathies.


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