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Brief Definitive Report

Tang et al. show that cytotoxic effector cells produce and respond to cysteinyl leukotrienes to allow target cell killing dependent on NKG2D and IL-15. They further demonstrate a role for cysteinyl leukotrienes in celiac disease pathogenesis.


Calderon et al. define the origin, turnover, and functional characteristics of pancreatic macrophages at both the exocrine and endocrine sites under noninflammatory conditions.

Expression of IKKα in intestinal epithelial cells promotes IL-22 production by group 3 innate lymphoid cells, and this axis is essential for defense against Citrobacter rodentium infection and to limit intestinal inflammation in response to DSS treatment.

Ridder et al. show that deletion of NEMO, a component of NF-kB signaling, in brain endothelial cells results in increased cerebral vascular permeability and endothelial cell death, and recapitulates the neurological symptoms observed in the genetic disease incontinentia pigmenti.

Giotopoulos et al. report a novel mouse model that closely mimics the natural progression of human chronic myeloid leukemia to blast crisis, and use this model to identify novel candidate genes and pathways that, in combination with BCR-ABL, drive disease progression.

Wu et al. report a novel IL-17–mediated cascade via the IL-17R–TRAF4–ERK5 axis that directly stimulates keratinocyte proliferation and skin tumor formation in mice.

Ziętara et al demonstrate with multicongenic fate mapping that thymus seeding is directly restricted to the duration of niche occupancy rather than long-range effects.

Paterson et al. demonstrate that, in contrast to CTLA-4 germline knockout mice, conditional deletion on T reg cells during adulthood confers protection from EAE and does not increase resistance to tumors.

Sekiya et al. demonstrate that deletion of the nuclear orphan receptor Nr4a in T reg cells results in a fatal systemic immunopathology due to abrogated suppressive capability in limiting Th2 and Tfh conversion.

Kreins et al. report the identification and immunological characterization of a group of TYK2-deficient patients.

Kolhatkar et al. report that altered BCR and TLR signaling orchestrates increased positive selection of transitional B cells expressing low-affinity self-reactive BCRs, leading to their enrichment within the naive B cell compartment. These findings have important implications to understand events that promote altered B cell selection in both Wiskott-Aldrich syndrome patients and in other autoimmune-prone individuals.

Mehta et al. uncover a novel role for miR-212/132 as a regulator of early B cell development.

Fiala et al. report that Kidins220/ARMS is a novel interactor of the B cell antigen receptor (BCR) and its deletion impairs B cell development and B cell functioning.

Local germinal center reactions that persist in the lung after influenza infection are required for the generation of cross-reactive memory B cells.

NOS1−/− mice show reduced inflammatory responses and tissue damage in experimental sepsis models. Baig et al show that NOS1-derived NO production in macrophages leads to proteolysis of SOCS1 to alleviate its repression of NFkB transcriptional activity in response to TLR4-mediated responses.

DCs recruit NK cells to the draining lymph node where they interact with DC creating a positive feedback loop of IL-27 and IFNγ production, which is ultimately limited by IL-10. This innate NK-DC axis controls the development of the adaptive response and dampens induction of autoimmunity.

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