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    ON THE COVER
    Luk et al. find that injection of brain lysate from symptomatic aged mice into the brains of asymptomatic young mice is sufficient to initiate spreading of α-synuclein aggregates and to accelerate the onset of Parkinson’s disease–like symptoms. Original image shows α-synuclein (green) and microtubule-associated protein 2 (red) in the brain of a mouse injected 90 d prior with symptomatic brain lysate. Artwork by Lewis Long (longdesign@earthlink.net).
    See page 975

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ISSN 0022-1007
EISSN 1540-9538
In this Issue

Editorial

Minireview

A growing body of evidence suggests that cell-to-cell spread of misfolded protein aggregates represents a mechanism underlying the pathogenesis of several neurodegenerative diseases.

Brief Definitive Report

High levels of glutathione peroxidase 3 (GPx3) expression correlate with adverse prognosis in acute myeloid leukemia, and enhance activity of long-term repopulating hematopoietic stem cells in mice.

GVHD is associated with significant shifts in the composition of the intestinal microbiota in human and mouse models; manipulating the microbiota can alter the severity of GVHD in mice.

In patients with XLP, a primary immunodeficiency caused by mutations in SH2D1A, EBV infection can lead to somatic reversion of the disease-causing mutation selectively in effector memory CD8 T cells; reverted CD8 cells are better able to respond to and kill EBV-infected cells.

Synovial fibroblasts from patients and mice with arthritis express autotaxin, and ablation of autotaxin in fibroblasts ameliorates disease.

Human skin-resident IL-10+ regulatory dendritic cells induce T reg cells that suppress allogeneic skin graft inflammation.

Responsiveness to interleukin-12, but not interferon-γ, is essential for the generation of long-lived natural killer cells capable of responding to secondary viral infection.

Interactions of Artemis with DNA Ligase IV and DNA-PKcs are required for efficient coding joint formation.

As revealed using an UNG2 inhibitor peptide fused to cell cycle–regulated degradation motifs, the cell cycle phase during which uracil residues are processed determines the fidelity of repair.

Article

Synthetic a-Synuclein fibrils injected into the brain spread far beyond the injection site and are sufficient to accelerate Parkinson’s disease–like pathology in mice.

Weak TCR stimulation of iNKT cells, such as that resulting from self-antigen recognition, induces histone modifications at the IFNG locus that allow the iNKT cells to subsequently produce IFN-γ in response to proinflammatory cytokines alone.

IL-6–producing B cells contribute to EAE pathology and possibly human MS, whereas ablation of B cell IL-6 is associated with a reduced Th17 response.

Blocking Dll4–Notch signaling can reverse established diabetes via Flt3-independent induction of immature thymic DCs that enhance Treg cell generation in mice.

Chikungunya virus induces autophagy by triggering ER and oxidative stress, and this autophagy restricts apoptosis and viral propagation.

Correction

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