Volume 100, Issue 1, Jul 2016
Editorial
Editorial: Treg potency and the importance of being fit
Discussion of the relationship between human Treg potency and inhibition of TCR signaling in Teff cells.
Editorial: Decoding the macrophage phagosomal environment: the hunt for key reductases is on
Discussion on the exogenous and endogenous regulatory pathways, which control phagosomal reduction.
Spotlight on Leading Edge Research
Human regulatory T cells control TCR signaling and susceptibility to suppression in CD4+ T cells
Potency of Treg suppressive function determines intracellular signaling, immune responsiveness, and later susceptibility of Teff to immune suppression.
Endogenous and exogenous pathways maintain the reductive capacity of the phagosome
Cytosolic reductive pathways act with the uptake of Cys from the extracellular space to maintain reductive capacity of the phagosome.
Reviews
TRIF-dependent TLR signaling, its functions in host defense and inflammation, and its potential as a therapeutic target
Review of the TRIF adaptor protein’s role in TLR signaling pathways, and its involvement in disease processes.
Leprosy as a model to understand cancer immunosurveillance and T cell anergy
Review on parallels that leprosy immune T cell response brings to cancer immunosurveillance, immunoediting, and immunotherapy.
In the eye of the neutrophil swarm—navigation signals that bring neutrophils together in inflamed and infected tissues
Review of the range of swarm-like neutrophil tissue dynamics, and how multiple chemoattractants control sequential steps of neutrophil swarming in different tissue contexts.
Type 1 diabetes genetic susceptibility and dendritic cell function: potential targets for treatment
Review of connections between T1D genetic susceptibility and alterations of DC-mediated tolerance, and potential immunotherapy for autoimmunity.
Linked in: immunologic membrane nanotube networks
Review on MNT-comprised intercellular networks in immune cell function and dysfunction, with a focus on myeloid lineage APCs.
Primary Research
PGE2-treated macrophages inhibit development of allergic lung inflammation in mice
Redirecting macrophage polarization with PGE2 inhibits development of allergic lung inflammation, and independent of macrophage origin, increasing its potential for therapy.
Hematopoietic LTβR deficiency results in skewed T cell cytokine profiles during a mucosal viral infection
Deletion of LTβR in the myeloid compartment results in an altered cellular immune response to mucosal viral infection, without a defect in viral clearance.
Retinoic acid-primed human dendritic cells inhibit Th9 cells and induce Th1/Th17 cell differentiation
RA promotes Th1 and Th17 responses by modulating CD103+ DCs, in the presence of inflammation.
Tumor necrosis factor drives increased splenic monopoiesis in old mice
EMH in the spleen increases with age, in a TNF-dependent manner.
PLA2G5 regulates transglutaminase activity of human IL-4-activated M2 macrophages through PGE2 generation
TGM activity in human M2 macrophages requires the presence of a functional PLA2G5, generating PGE2.
Cell Development, Differentiation, & Trafficking
Myosin-IIA regulates leukemia engraftment and brain infiltration in a mouse model of acute lymphoblastic leukemia
MyoIIA regulates leukemia cell engraftment and dissemination into the brain, by promoting TEM of Bcr-Abl+ ALL cells.
Receptors, Signal Transduction, & Genes
The E3 ubiquitin ligase RNF144B is LPS-inducible in human, but not mouse, macrophages and promotes inducible IL-1β expression
LPS upregulates RNF144B in human macrophages for optimal IL-1β expression and priming of inflammasome responses, but is not LPS-inducible in mouse macrophages.
Src family kinase expression and subcellular localization in macrophages: implications for their role in CSF-1-induced macrophage migration
SFKs are required for CSF-1R signaling to motility and invasion, with different expression profiles in human and mouse macrophages.
Inflammation, Extracellular Mediators, & Effector Molecules
TREM-like transcript 2 is stored in human neutrophil primary granules and is up-regulated in response to inflammatory mediators
TLT2 expression is conserved between mouse and human, and increased on leukocytes, in response to microbial products.
Mincle suppresses Toll-like receptor 4 activation
C-type lectin receptor Mincle involvement on the modulation of TLR4 inflammatory responses.
Cigarette smoke inhibits efferocytosis via deregulation of sphingosine kinase signaling: reversal with exogenous S1P and the S1P analogue FTY720
SPHK1/2 regulation of efferocytosis in macrophages offers a novel therapeutic approach for COPD.
Host Defense & Pathophysiology
Control of influenza infection is impaired by diminished interferon-γ secretion by CD4 T cells in the lungs of toddler mice
Diminished IFN-γ in the lungs of 21- day-young (toddler) mice throughout infection corresponds to intrinsic rather than extrinsic CD4 T cell limitations in IFN-γ transcription, indicating a limited CD4 T cell response in toddler age.
JAK/STAT regulation of Aspergillus fumigatus corneal infections and IL-6/23-stimulated neutrophil, IL-17, elastase, and MMP9 activity
Ruxolitinib blockade of STAT3 phosphorylation in IL-6/23- stimulated neutrophils, inhibits RORγt translocation, IL-1- induced production of ROS, MMP9, and elastase activity, and modulates Aspergillus fumigatus corneal infections.
Translational & Clinical Immunology
Antiretroviral therapy in HIV-1-infected individuals with CD4 count below 100 cells/mm3 results in differential recovery of monocyte activation
In advanced HIV-1 disease, 24 weeks of ART-mediated recovery results in reversal of activated cell-specific monocyte subsets, with minimal recovery of soluble makers of tissue-associated myeloid activation.
Technical Advance
Human MAIT-cell responses to Escherichia coli: activation, cytokine production, proliferation, and cytotoxicity
A tool-kit of adapted and optimized methods allowing for detailed functional examination of human MAIT cells responding to bacterial antigen.
Microfluidic assay for precise measurements of mouse, rat, and human neutrophil chemotaxis in whole-blood droplets
A microfluidic assay enables precise characterization of neutrophil migration in the native blood environment, independent of the donor species, and at single cell resolution.