1,720,964 research outputs found
TLR9 activation is required for cytotoxic response elicited by baculovirus capsid display
No full textAlthough the baculovirus Autographa californica multiple nuclear polyhedrosis virus (AcMNPV) infects lepidopteran invertebrates as natural hosts, represents an efficient vector for vaccine development. Baculovirus surface display induces strong humoral responses against viruses and parasites. A novel strategy based on capsid display carrying foreign antigens in the AcMNPV particle further improved the immune response by eliciting CD8+ T cell activation. In this study, we analyze the intracellular mechanisms and signalling pathways involved in CD8+ T cell activation by capsid display. Our results show that baculovirus can attach to the cell surface, enter dendritic cells (DCs), transit within endocytic vesicles and escape to the cytosol for further degradation by the proteasome. We found that the availability of viral proteins, endosomal acidification, and proteasome activity are needed for efficient Major Histocompatibility Complex class-I presentation by baculovirus carrying Ovalbumin in the viral capsid. Importantly, we demonstrated with this strategy that the induction of cytotoxic T cells and IL-12 production by DCs are TLR9-dependent and STING-independent. Finally, our study shows differential intracellular processing for capsid and surface baculovirus proteins in DCs and highlights the role of different danger receptors during cytotoxic T cell priming through the capsid display delivery system, which could lead to improved baculovirus-based vaccines development.Instituto de BiotecnologíaFil: Molinari, Maria Paula. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); ArgentinaFil: Molinari, Maria Paula. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Molinari, Maria Paula. Universidad Nacional de Moreno. Departamento de Ciencias Aplicadas y Tecnología (DCAyT); ArgentinaFil: Crespo, Maria Ines. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Bioquímica Clínica; ArgentinaFil: Crespo, Maria Ines. Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI); ArgentinaFil: Crespo, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Molina, Guido Nicolás. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); ArgentinaFil: Molina, Guido Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Molina, Guido Nicolás. Universidad Nacional de Moreno. Departamento de Ciencias Aplicadas y Tecnología (DCAyT); ArgentinaFil: Dho, Nicolás D. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Bioquímica Clínica; ArgentinaFil: Dho, Nicolás D. Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI); ArgentinaFil: Dho, Nicolás D. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Marinho, Fábio V. Federal University of Minas Gerais. Institute of Biological Sciences. Department of Biochemistry and Immunology; BrasilFil: Maletto, Belkys Angélica. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Bioquímica Clínica; ArgentinaFil: Maletto, Belkys Angélica. Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI); ArgentinaFil: Maletto, Belkys Angélica. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Leclerc, Claude. Institut Pasteur. Departement d’Immunologie; FranciaFil: Oliveira, Sergio C. Federal University of Minas Gerais. Institute of Biological Sciences. Department of Biochemistry and Immunology; BrasilFil: Oliveira, Sergio C. University of Sao Paulo. Institute of Biomedical Sciences. Department of Immunology; BrasilFil: Taboga, Oscar Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Agrobiotecnología y Biología Molecular (IABIMO); ArgentinaFil: Taboga, Oscar Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cebrian, Ignacio. Universidad Nacional de Cuyo. Instituto de Histología y Embriología de Mendoza (IHEM); ArgentinaFil: Cebrian, Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Moron, Victor Gabriel. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Bioquímica Clínica; ArgentinaFil: Moron, Victor Gabriel. Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI); ArgentinaFil: Moron, Victor Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
P53 tumor suppressor is required for efficient execution of the death program following treatment with a cytotoxic limonoid obtained from Melia azedarach
Get PDFThis work examines the antitumor activity of an isomeric mixture (1), composed of the limonoids meliartenin and its interchangeable isomer 12-hydroxyamoorastatin. The results obtained showed that 1 displayed outstanding cytotoxic activity against CCRF-CEM, K562, A549 and HCT116 cells, with a highly selective effect on the latter, with an IC50 value of 0.2 μM. Based on this finding, HCT116 cells were selected to study the mechanism of action of 1. Cell cycle analysis revealed that 1 induced sustained arrest in the S-phase, which was followed by the triggering of apoptotic cell death and reduced clonogenic capacity. This cytotoxicity was seen to be preceded by the upregulation of the tumor suppressor p53 and its target effector p21. In addition, it was found that p53 expression was required for efficient cell death induction, and thus that the toxicity of 1 relies mainly on p53-dependent mechanisms. Taken together, these findings position 1 as a potent antitumor agent, with potential for the development of novel chemotherapeutic drugs based on the induction of S-phase arrest.Fil: Joray, Mariana Belén. Universidad Católica de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Villafañez, Florencia. Universidad Nacional de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: González, María Laura. Universidad Católica de Córdoba; ArgentinaFil: Crespo, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Católica de Córdoba; ArgentinaFil: Laiolo, Jerónimo. Universidad Católica de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Palacios, Sara Maria. Universidad Católica de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bocco, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Soria, Ramiro Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Carpinella, Maria Cecilia. Universidad Católica de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Double-layered rotavirus-like particles are efficient carriers to elicit strong CTL responses to delivered heterologous antigens
No full textThe first 92 amino acids of VP2 of rotavirus are dispensable for VLP assembly and can be replaced by heterologous reporter proteins without affecting either self-assembly of chimeric VP2 or the interaction with VP6 to render chimeric VP2/6 VLPs. In this study, we constructed recombinant baculoviruses expressing GFP or OVA fused to the amino terminus of a truncated VP2 sequence and produced chimeric VLPs by co-infection with a baculovirus expressing VP6. The results showed that these chimeric VLPs were efficiently uptaken by murine dendritic cells and that the heterologous sequences contained in the core of these VLPs seemed to be able to reach the MHC-I pathway as they elicited strong and specific CTL responses. Therefore, the data presented here suggest that chimeric VLPs could be used as excellent carriers to elicit CTL responses to antigens transported inside the VLPsFil: Molinari, Maria Paula. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Peralta, Andrea Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Maletto, Belkys Angélica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Pistoresi, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Crespo, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Moron, Victor Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Taboga, Oscar Alberto. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Biotecnología; Argentin
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