Volume 94, Issue 5, Nov 2013
Issue Information
Issue Information
Editorials
Editorial: Btk—friend or foe in autoimmune diseases?
Discussion on the role of Bruton's tyrosine kinase (Btk) signaling in auto-reactive B cell development and activation.
Editorial: New tricks for innate lymphoid cells
Discussion on recently identified properties of innate lymphoid cells that may implicate novel functions in health and disease.
Spotlight on Leading Edge Research
The role of Bruton's tyrosine kinase in the development and BCR/TLR-dependent activation of AM14 rheumatoid factor B cells
Bruton's tyrosine kinase signaling is not required for BCR/TLR-dependent activation of autoreactive B cells.
Type 2 innate lymphoid cells constitutively express arginase-I in the naïve and inflamed lung
ILC2s express arginase-I independently of STAT6 in resting tissue and during helminth infection.
Reviews
TLR2 & Co: a critical analysis of the complex interactions between TLR2 and coreceptors
Review on TLR2 co-receptors and ligand interactions, and their significance to TLR2 function.
Migratory conventional dendritic cells in the induction of peripheral T cell tolerance
Review on the contribution of gut, skin, and lung migratory DCs to peripheral tolerance, specifically Treg cell induction in homeostatic conditions.
Extrinsic and intrinsic control of macrophage inflammatory responses
Review of how macrophages switch from an inflammatory to regulatory activation state during disease, and a newly identified mechanism governing this transition.
Th17 memory cells: live long and proliferate
Review of recent evidence that Th17 memory cells are a long-lived, robust population effective in responses to infection, and deleterious in autoimmune disease.
RIP2 activity in inflammatory disease and implications for novel therapeutics
Review on the role that the NOD2:RIP2 complex plays in inflammatory disease, with an emphasis on its inhibition as a future drug target.
The role of type 2 innate lymphoid cells in asthma
Review of how innate lymphoid cells (newly described cell types that produce a variety of cytokines) appear to play important roles in asthma.
RelB: an outlier in leukocyte biology
Review on how NF-kB member RelB regulates leukocyte biology by reprograming bioenergetics, metabolism and immune phenotypes, thereby influencing both homeostasis and inflammatory diseases.
Primary Research
Macrophage migration arrest due to a winning balance of Rac2/Sp1 repression over β-catenin-induced PLD expression
A novel molecular mechanism underlying arrest of monocyte/ macrophage migration important for the physiological maintenance of leukocytes at the site of inflammation.
Kupffer cells potentiate liver sinusoidal endothelial cell injury in sepsis by ligating programmed cell death ligand-1
Programmed cell death ligand-1 gene deficiency attenuates liver sinusoidal endothelial cell injury in sepsis, resulting from interactions with programmed cell death receptor-1 expressing Kupffer cells.
The impact of α-toxin on host cell plasma membrane permeability and cytokine expression during human blood infection by CA-MRSA USA300
Alpha-toxin expression by CA-MRSA USA300, compromises human monocyte plasma membrane integrity, with a redundant role influencing overall cytokine expression during early human blood infection.
Cell Development, Differentiation, & Trafficking
All-trans retinoic acid and rapamycin synergize with transforming growth factor-β1 to induce regulatory T cells but confer different migratory capacities
TGF-β plus rapamycin-induced regulatory T cells (iTreg) are comparable to iTreg induced with TGF-β plus retinoic acid in their suppressive capacity, but reveal distinct migration patterns in vivo that affect their therapeutic use.
The human fetal lymphocyte lineage: identification by CD27 and LIN28B expression in B cell progenitors
Human fetal lymphocyte lineage identified by CD27 and LIN28B expression during early B-cell development.
Receptors, Signal Transduction, & Genes
TLR3 impairment in human newborns
Absence of TLR3 mRNA and protein expression in cord blood NK cells and its consequent functional implication.
Sphingosine-1-phosphate can promote mast cell hyper-reactivity through regulation of contactin-4 expression
Chronic exposure to sphingosine-1-phosphate within, or outside, mast cells causes gene expression alterations that modulate FcɛRI-mediated mast cell responses, and the onset of allergic reaction.
Inflammation, Extracellular Mediators, & Effector Molecules
Length of dsRNA (poly I:C) drives distinct innate immune responses, depending on the cell type
Using short or long Poly I:C to induce optimal innate immune responses or adjuvant effects depends on the target cell types.
Coordinated induction of cyclooxygenase-2/prostaglandin E2 and hepatocyte growth factor by apoptotic cells prevents lung fibrosis
Up-regulation of COX-2/PGE2 and HGF through a positive feedback loop may be an important mechanism whereby apoptotic cell instillation exerts anti-fibrotic action.
Translational & Clinical Immunology
Increased expression of intrinsic antiviral genes in HLA-B*57-positive individuals
Novel association between intrinsic viral resistance genes and HLA class I provide additional mechanistic determinants in HIV-1 disease outcomes.
CD14+CD33+ myeloid cell-CCL11-eosinophil signature in ulcerative colitis
CD14+CD33+ intestinal myeloid cells produce CCL11, which recruits eosinophils both in active and quiescent UC; levels of activated (CD66bhigh) eosinophils correlate with disease severity.
Phagocyte dysfunction in polymyalgia rheumatica and other age-related, chronic, inflammatory conditions
Phagocyte function deregulated in age-restricted inflammatory disorders.
CXCL13 is elevated in Sjögren's syndrome in mice and humans and is implicated in disease pathogenesis
CXCL13 in Sjögren's syndrome increases with disease progression in mice and is elevated in human sera and saliva; blockade of CXCL13 ameliorates disease in an SS murine model.
Technical Advance
Technical Advance: Inhibition of neutrophil chemotaxis by colchicine is modulated through viscoelastic properties of subcellular compartments
Combining non-invasive biophysical techniques to analyze cellular deformability with mathematical modeling of timedependent deformability, reveals the impact of therapeutic colchicine concentrations on cytoskeletal compartments and cell mechanics.