Painting a transcriptional landscape of NK cells is a significant step toward understanding their activation, development,

and functional heterogeneity. This not only provides us with a global view of what occurs under these conditions in various cell types, but also potentially reveals new genes with important immunological function. These valuable resources impart crucial clues for further investigations into NK cells that will facilitate and accelerate research into multiple areas of NK-cell biology and into NK-cell-mediated clinical immunotherapy. We thank Yonggang Zhou for helping to export the network map into the manuscript. This work was supported by grants from the Natural Science Foundation of China (#81330071, #31021061). The authors declare no financial or Small molecule library ic50 commercial find more conflict of interest. “
“Several optical imaging techniques have been used to monitor bacterial tropisms for cancer. Most such techniques require genetic engineering of the bacteria to express optical reporter genes. This

study investigated a novel tumor-targeting strain of bacteria, Rhodobacter sphaeroides 2.4.1 (R. sphaeroides), which naturally emits near-infrared fluorescence, thereby facilitating the visualization of bacterial tropisms for cancer. To determine the penetration depth of bacterial fluorescence, various numbers of cells (from 108 to 1010 CFU) Molecular motor of R. sphaeroides and two types of Escherichia coli, which stably express green fluorescent protein (GFP) or red fluorescent protein (RFP), were injected s.c. or i.m. into mice. Bacterial tropism for cancer was determined after i.v. injection of R. sphaeroides (108 CFU) into mice implanted s.c. with eight types of tumors. The intensity of

the fluorescence signal in deep tissue (muscle) from R. sphaeroides was much stronger than from E. coli-expressing GFP or RFP. The near-infrared fluorescence signal from R. sphaeroides was visualized clearly in all types of human or murine tumors via accumulation of bacteria. Analyses of C-reactive protein and procalcitonin concentrations and body weights indicated that i.v. injection of R. sphaeroides does not induce serious systemic immune reactions. This study suggests that R. sphaeroides could be used as a tumor-targeting microorganism for the selective delivery of drugs to tumor tissues without eliciting a systemic immune reaction and for visualizing tumors. “
“Leiden University Medical Center, Department of Nephrology, D3-P, postbus 9600, 2300 RC Leiden, the Netherlands UCL Institute of Child Health, Molecular Immunology Unit, 30 Guilford Street, London WC1N 1EH, UK Transgen-enhet, Domus Medica, Sognsvannsveien 9, 0317 Oslo, Norway It is widely believed that DC, but not macrophages, prime naïve T cells in vivo.