3,765 research outputs found

    Integrable deformations of AdS/CFT

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    In this paper we study in detail the deformations introduced in [1] of the integrable structures of the AdS2,3_{2,3} integrable models. We do this by embedding the corresponding scattering matrices into the most general solutions of the Yang-Baxter equation. We show that there are several non-trivial embeddings and corresponding deformations. We work out crossing symmetry for these models and study their symmetry algebras and representations. In particular, we identify a new elliptic deformation of the AdS3×S3×M4\rm AdS_3 \times S^3 \times M^4 string sigma model.Comment: v2: We corrected typos and added some references; v3: corrected crossing for AdS2 deformatio

    Photobacterium sanctipauli sp nov isolated from bleached Madracis decactis (Scleractinia) in the St Peter & St Paul Archipelago, Mid-Atlantic Ridge, Brazil

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    Five novel strains of Photobacterium (A-394T, A-373, A-379, A-397 and A-398) were isolated from bleached coralMadracis decactis (scleractinian) in the remote St Peter & St Archipelago (SPSPA), Mid-Atlantic Ridge, Brazil. Healthy M. decactis specimens were also surveyed, but no strains were related to them. The novel isolates formed a distinct lineage based on the 16S rRNA, recA, and rpoA gene sequences analysis. Their closest phylogenetic neighbours were Photobacterium rosenbergii, P. gaetbulicola, and P. lutimaris, sharing 96.6 to 95.8% 16S rRNA gene sequence similarity. The novel species can be differentiated from the closest neighbours by several phenotypic and chemotaxonomic markers. It grows at pH 11, produces tryptophane deaminase, presents the fatty acid C-18:0, but lacks C-16:0 iso. The whole cell protein profile, based in MALDI-TOF MS, distinguished the strains of the novel species among each other and from the closest neighbors. In addition, we are releasing the whole genome sequence of the type strain. The name Photobacterium sanctipauli sp. nov. is proposed for this taxon. The G + C content of the type strain A-394(T) (=LMG27910(T) = CAIM1892(T)) is 48.2 mol%

    The APOKASC Catalog: An Asteroseismic and Spectroscopic Joint Survey of Targets in the Kepler Fields

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    We present the first APOKASC catalog of spectroscopic and asteroseismic properties of 1916 red giants observed in the Kepler fields. The spectroscopic parameters provided from the Apache Point Observatory Galactic Evolution Experiment project are complemented with asteroseismic surface gravities, masses, radii, and mean densities determined by members of the Kepler Asteroseismology Science Consortium. We assess both random and systematic sources of error and include a discussion of sample selection for giants in the Kepler fields. Total uncertainties in the main catalog properties are of order 80 K in Teff , 0.06 dex in [M/H], 0.014 dex in log g, and 12% and 5% in mass and radius, respectively; these reflect a combination of systematic and random errors. Asteroseismic surface gravities are substantially more precise and accurate than spectroscopic ones, and we find good agreement between their mean values and the calibrated spectroscopic surface gravities. There are, however, systematic underlying trends with Teff and log g. Our effective temperature scale is between 0-200 K cooler than that expected from the Infrared Flux Method, depending on the adopted extinction map, which provides evidence for a lower value on average than that inferred for the Kepler Input Catalog (KIC). We find a reasonable correspondence between the photometric KIC and spectroscopic APOKASC metallicity scales, with increased dispersion in KIC metallicities as the absolute metal abundance decreases, and offsets in Teff and log g consistent with those derived in the literature. We present mean fitting relations between APOKASC and KIC observables and discuss future prospects, strengths, and limitations of the catalog data.Comment: 49 pages. ApJSupp, in press. Full machine-readable ascii files available under ancillary data. Categories: Kepler targets, asteroseismology, large spectroscopic survey

    Characterization of Systemic Disease Development and Paw Inflammation in a Susceptible Mouse Model of Mayaro Virus Infection and Validation Using X-ray Synchrotron Microtomography

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    Mayaro virus (MAYV) is an emerging arthropod-borne virus endemic in Latin America and the causative agent of arthritogenic febrile disease. Mayaro fever is poorly understood; thus, we established an in vivo model of infection in susceptible type-I interferon receptor-deficient mice (IFNAR−/−) to characterize the disease. MAYV inoculations in the hind paws of IFNAR−/− mice result in visible paw inflammation, evolve into a disseminated infection and involve the activation of immune responses and inflammation. The histological analysis of inflamed paws indicated edema at the dermis and between muscle fibers and ligaments. Paw edema affected multiple tissues and was associated with MAYV replication, the local production of CXCL1 and the recruitment of granulocytes and mononuclear leukocytes to muscle. We developed a semi-automated X-ray microtomography method to visualize both soft tissue and bone, allowing for the quantification of MAYV-induced paw edema in 3D with a voxel size of 69 µm3. The results confirmed early edema onset and spreading through multiple tissues in inoculated paws. In conclusion, we detailed features of MAYV-induced systemic disease and the manifestation of paw edema in a mouse model extensively used to study infection with alphaviruses. The participation of lymphocytes and neutrophils and expression of CXCL1 are key features in both systemic and local manifestations of MAYV disease

    COMT and MAO-A Polymorphisms and Obsessive-Compulsive Disorder: A Family-Based Association Study

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    ObjectiveObsessive-compulsive disorder (OCD) is a common and debilitating psychiatric illness. Although a genetic component contributes to its etiology, no single gene or mechanism has been identified to the OCD susceptibility. the catechol-O-methyltransferase (COMT) and monoamine oxidase A (MAO-A) genes have been investigated in previous OCD studies, but the results are still unclear. More recently, Taylor (2013) in a comprehensive meta-analysis of genetic association studies has identified COMT and MAO-A polymorphisms involved with OCD. in an effort to clarify the role of these two genes in OCD vulnerability, a family-based association investigation was performed as an alternative strategy to the classical case-control design.MethodsTransmission disequilibrium analyses were performed after genotyping 13 single-nucleotide polymorphisms (eight in COMT and five in MAO-A) in 783 OCD trios (probands and their parents). Four different OCD phenotypes (from narrow to broad OCD definitions) and a SNP x SNP epistasis were also analyzed.ResultsOCD, broad and narrow phenotypes, were not associated with any of the investigated COMT and MAO-A polymorphisms. in addition, the analyses of gene-gene interaction did not show significant epistatic influences on phenotype between COMT and MAO-A.ConclusionsThe findings do not support an association between DSM-IV OCD and the variants of COMT or MAO-A. However, results from this study cannot exclude the contribution of these genes in the manifestation of OCD. the evaluation of broader spectrum phenotypes could help to understand the role of these and other genes in the pathophysiology of OCD and its spectrum disorders.Brazilian governmental agenciesConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundo de Aprimoramento Academico (FUAA-Grant for Academic Improvement)Department of Psychiatry University of São Paulo School of MedicineUniv São Paulo, Fac Med, Dept & Inst Psychiat, São Paulo, SP, BrazilUniv Fed Bahia, Serv Med Univ, Salvador, BA, BrazilUniv Pernambuco, Fac Ciencias Med, Recife, PE, BrazilUniversidade Federal de São Paulo, São Paulo, SP, BrazilBritish Columbia Mental Hlth & Addict Res Inst, Vancouver, BC, CanadaMassachusetts Gen Hosp, PNGU, Boston, MA 02114 USAMassachusetts Gen Hosp, Ctr Human Genet Res, Boston, MA 02114 USAUniv Calif San Francisco, Dept Psychiat, San Francisco, CA USAHosp Sick Children, Program Genet & Genome Biol, Toronto, ON M5G 1X8, CanadaUniv Michigan, Dept Psychiat, Ann Arbor, MI 48109 USASunnybrook Hlth Sci Ctr, Frederick W Thompson Anxiety Disorders Ctr, Toronto, ON M4N 3M5, CanadaUniv Toronto, Ctr Addict & Mental Hlth, Toronto, ON, CanadaUniv Fed Rio de Janeiro, Inst Psiquiatria, IPUB, Programa Ansiedade & Depressao, Rio de Janeiro, BrazilUniv São Paulo, Inst Math & Stat, Dept Stat, São Paulo, SP, BrazilUniversidade Federal de São Paulo, São Paulo, SP, BrazilCNPq: 573974/2008-0FAPESP: 2005/55628-08FAPESP: 2008/57896-8Web of Scienc

    Immunogenicity, Safety, and Efficacy of a Standalone Universal Influenza Vaccine, FLU-v, in Healthy Adults

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    Background: FLU-v is a broad-spectrum influenza vaccine that induces antibodies and cell-mediated immunity. Objective: To compare the safety, immunogenicity, and exploratory efficacy of different formulations and dosing regimens of FLU-v versus placebo. Design: Randomized, double-blind, placebo-controlled, single-center phase 2b clinical trial. (ClinicalTrials.gov: NCT02962908; Eudra CT: 2015-001932-38) Setting: The Netherlands. Participants: 175 healthy adults aged 18 to 60 years. Intervention: 0.5-mL subcutaneous injection of 500 mu g of adjuvanted (1 dose) or nonadjuvanted (2 doses) FLU-v (A-FLU-v or NA-FLU-v) or adjuvanted or nonadjuvanted placebo (A-placebo or NA-placebo) (2:2:1:1 ratio). Measurements: Vaccine-specific cellular responses at days 0, 42, and 180 were assessed via flow cytometry and enzyme-linked immunosorbent assay. Solicited information on adverse events (AEs) was collected for 21 days after vaccination. Unsolicited information on AEs was collected throughout the study. Results: The AEs with the highest incidence were mild to moderate injection site reactions. The difference between A-FLU-v and A-placebo in the median fold increase in secreted interferon-gamma (IFN-gamma) was 38.2-fold (95% CI, 4.7- to 69.7-fold; P = 0.001) at day 42 and 25.0-fold (CI, 5.7- to 50.9-fold; P <0.001) at day 180. The differences between A-FLU-v and A-placebo in median fold increase at day 42 were 4.5-fold (CI, 2.3- to 9.8-fold; P <0.001) for IFN-gamma-producing CD4+ T cells, 4.9-fold (CI, 1.3- to 40.0-fold; P <0.001) for tumor necrosis factor-alpha (TNF-alpha), 7.0-fold (CI, 3.5- to 18.0-fold; P <0.001) for interleukin-2 (IL-2), and 1.7-fold (CI, 0.1- to 4.0-fold; P = 0.004) for CD107a. At day 180, differences were 2.1-fold (CI, 0.0- to 6.0-fold; P = 0.030) for IFN-gamma and 5.7-fold (CI, 2.0- to 15.0-fold; P <0.001) for IL-2, with no difference for TNF-alpha or CD107a. No differences were seen between NA-FLU-v and NA-placebo. Limitation: The study was not powered to evaluate vaccine efficacy against influenza infection. Conclusion: Adjuvanted FLU-v is immunogenic and merits phase 3 development to explore efficacy. Primary Funding Source: SEEK and the European Commission Directorate-General for Research and Innovation, European Member States within the UNISEC (Universal Influenza Vaccines Secured) project
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