The structures of new dense forms of silicon and germanium, recovered from high pressure experiments, have been determined from their Debye-Scherrer patterns. :For silicon, the space group is Ia3 (T~), a = 6.636 _+ 0.005 A, Z = 16, and there is one structural parameter corresponding to occupancy of 16(c) positions, with x = 0.1003 _+ 0"0008. The measured and calculated density is 2.55 g.cm -s.The space group of germanium is P43212 (D4 s) with a=5.93 _+0.01, c=6-98_+0-01 A, and Z=12. Two kinds of germanium atom occupy the 4(a), xxO, etc., and 8(b) xyz, etc., positions; x for 4(a) is 0.0912_+0.0060, and for 8(b) x = 0.1730 _+ 0.0037, y--0.3784_+0-0051, z=0.2486_+0-0048. The measured density is 5-88 g.cm -a, the calculated 5.91 g.cm -3.The two structures represent two different ways of achieving higher density relative to the diamond structure without change of coordination number and with little effect on interatomic distance. The angular distortions, particularly for germanium, are, however, appreciable.

The RIG-I like receptor pathway is stimulated during RNA virus infection by interaction between cytosolic RIG-I and viral RNA structures that contain short hairpin dsRNA and 5′ triphosphate (5′ppp) terminal structure. In the present study, an RNA agonist of RIG-I was synthesized in vitro and shown to stimulate RIG-I-dependent antiviral responses at concentrations in the picomolar range. In human lung epithelial A549 cells, 5′pppRNA specifically stimulated multiple parameters of the innate antiviral response, including IRF3, IRF7 and STAT1 activation, and induction of inflammatory and interferon stimulated genes - hallmarks of a fully functional antiviral response. Evaluation of the magnitude and duration of gene expression by transcriptional profiling identified a robust, sustained and diversified antiviral and inflammatory response characterized by enhanced pathogen recognition and interferon (IFN) signaling. Bioinformatics analysis further identified a transcriptional signature uniquely induced by 5′pppRNA, and not by IFNα-2b, that included a constellation of IRF7 and NF-kB target genes capable of mobilizing multiple arms of the innate and adaptive immune response. Treatment of primary PBMCs or lung epithelial A549 cells with 5′pppRNA provided significant protection against a spectrum of RNA and DNA viruses. In C57Bl/6 mice, intravenous administration of 5′pppRNA protected animals from a lethal challenge with H1N1 Influenza, reduced virus titers in mouse lungs and protected animals from virus-induced pneumonia. Strikingly, the RIG-I-specific transcriptional response afforded partial protection from influenza challenge, even in the absence of type I interferon signaling. This systems approach provides transcriptional, biochemical, and in vivo analysis of the antiviral efficacy of 5′pppRNA and highlights the therapeutic potential associated with the use of RIG-I agonists as broad spectrum antiviral agents.

BACKGROUND Blood alcohol is present in a third of trauma patients and has been associated with organ dysfunction. In both human studies and in animal models, it is clear that alcohol intoxication exerts immunomodulatory effects several hours to days after exposure, when blood alcohol is no longer detectable. The early immunomodulatory effects of alcohol while blood alcohol is still elevated are not well understood. METHODS Human volunteers achieved binge alcohol intoxication after high-dose alcohol consumption. Blood was collected for analysis prior to alcohol ingestion, and 20 min, 2 h, and 5 h after alcohol ingestion. Flow cytometry was performed on isolated peripheral blood mononuclear cells, and cytokine generation in whole blood was measured by enzyme-linked immunosorbent assay (ELISA) after 24-h stimulation with lipopolysaccharide (LPS) and phytohemagglutinin-M (PHA) stimulation. RESULTS An early pro-inflammatory state was evident at 20 min when blood alcohol levels were ~130 mg/dL, which was characterized by an increase in total circulating leukocytes, monocytes, and natural killer cells. During this time, a transient increase in LPS-induced tumor necrosis factor (TNF)-α levels and enhanced LPS sensitivity occurred. At 2 and 5 h post-alcohol binge, an anti-inflammatory state was shown with reduced numbers of circulating monocytes and natural killer cells, attenuated LPS-induced interleukin (IL)-1β levels, and a trend toward increased interleukin (IL)-10 levels. CONCLUSIONS A single episode of binge alcohol intoxication exerted effects on the immune system that caused an early and transient pro-inflammatory state followed by an anti-inflammatory state.

The crystal structure of the compound YB66 has been determined by single-=rystal techniques utilizing X-ray intensities measured by a scintillation counter. The crystal system is cubic with a= 23.440 (a= 0.006) A; the space group is Fm3c (06). There are approximately 1584 boron atoms and 24 yttrium atoms in the unit cell. The majority of the boron atoms (1248) are contained in thirteen-icosahedron units of 156 atoms each-a thirteen-icosahedron unit is a cluster of twelve B~2 icosahedra grouped around a thirteenth. Bonds connecting boron atoms within icosahedra range in length from 1-719 to 1.855 A. The shortest intericosahedral bond is 1.624/~; the longest is 1.823 A. The remaining boron atoms are statistically distributed in channels that result from the packing of the thirteen-icosahedron units and form non-icosahedral cages. The yttrium atoms partially occupy sites in the channels and coordinate with the cage borons and the icosahedral borons surrounding them. The yttrium-boron bond lengths are in the range of 2.691-2.768 A.

An understanding of prognostic factors in breast cancer is imperative for guiding patient care. Increased tumor size and more advanced nodal status are established independent prognostic factors of poor outcomes and are incorporated into the American Joint Committee on Cancer (AJCC) TNM (primary tumor, regional lymph node, distant metastasis) staging system. However, other factors including imaging findings, histologic evaluation results, and molecular findings can have a direct effect on a patient's prognosis, including risk of recurrence and relative survival. Several microarray panels for gene profiling of tumors are approved by the U.S. Food and Drug Administration and endorsed by the American Society of Clinical Oncology. This article highlights prognostic factors currently in use for individualizing and guiding breast cancer therapy and is divided into four sections. The first section addresses patient considerations, in which modifiable and nonmodifiable prognostic factors including age, race and ethnicity, and lifestyle factors are discussed. The second part is focused on imaging considerations such as multicentric and/or multifocal disease, an extensive intraductal component, and skin or chest wall involvement and their effect on treatment and prognosis. The third section is about histopathologic findings such as the grade and presence of lymphovascular invasion. Last, tumor biomarkers and tumor biology are discussed, namely hormone receptors, proliferative markers, and categorization of tumors into four recognized molecular subtypes including luminal A, luminal B, human epidermal growth factor receptor 2-enriched, and triple-negative tumors. By understanding the clinical effect of these prognostic factors, radiologists, along with a multidisciplinary team, can use these tools to achieve individualized patient care and to improve patient outcomes. ©