26 research outputs found

    Depletion of the SR-related protein TbRRM1 leads to cell cycle arrest and apoptosis-like death in Trypanosoma brucei

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    Arginine-Serine (RS) domain-containing proteins are RNA binding proteins with multiple functions in RNA metabolism. In mammalian cells this group of proteins is also implicated in regulation and coordination of cell cycle and apoptosis. In trypanosomes, an early branching group within the eukaryotic lineage, this group of proteins is represented by 3 members, two of them are SR proteins and have been recently shown to be involved in rRNA processing as well as in pre-mRNA splicing and stability. Here we report our findings on the 3rd member, the SR-related protein TbRRM1. In the present study, we showed that TbRRM1 ablation by RNA-interference in T. brucei procyclic cells leads to cell-cycle block, abnormal cell elongation compatible with the nozzle phenotype and cell death by an apoptosis-like mechanism. Our results expand the role of the trypanosomal RS-domain containing proteins in key cellular processes such as cell cycle and apoptosis-like death, roles also carried out by the mammalian SR proteins, and thus suggesting a conserved function in this phylogenetically conserved protein family.Fil: Levy, Gabriela Vanesa. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); ArgentinaFil: Bañuelos, Carolina Paula. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); ArgentinaFil: NĂ­ttolo, AnalĂ­a Gabriela. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); ArgentinaFil: Ortiz, GastĂłn Ezequiel. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); Argentina. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Houssay. Instituto de Investigaciones en MicrobiologĂ­a y ParasitologĂ­a MĂ©dica. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones en MicrobiologĂ­a y ParasitologĂ­a MĂ©dica; ArgentinaFil: Mendiondo, Nicolas. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); ArgentinaFil: Moretti, Georgina. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); ArgentinaFil: Tekiel, Valeria Sonia. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); ArgentinaFil: Sanchez, Daniel Oscar. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Centro CientĂ­fico TecnolĂłgico Conicet - La Plata. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs). Universidad Nacional de San MartĂ­n. Instituto de Investigaciones BiotecnolĂłgicas. Instituto de Investigaciones BiotecnolĂłgicas "Dr. RaĂșl AlfonsĂ­n" (sede ChascomĂșs); Argentin

    Exploiting electron storage in TiO2 nanoparticles for dark reduction of As(v) by accumulated electrons

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    UV irradiation of an ethanolic sol of TiO2 nanoparticles produces a trapped Ti(III) centre and a noticeable Burstein shift. Direct evidence that the accumulated charges can drive the otherwise forbidden reduction of As(V) by conduction band electrons is presented.Fil: Levy, Ivana Karina. Comision Nacional de Energia Atomica. Gerencia Quimica. CAC; Argentina. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂ­mica, FĂ­sica de los Materiales, Medioambiente y EnergĂ­a; Argentina. Universidad de Buenos Aires; ArgentinaFil: Brusa, Marta Adelina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂ­mica; ArgentinaFil: Aguirre, MatĂ­as Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂ­mica; ArgentinaFil: Custo, Graciela. Comision Nacional de Energia Atomica. Gerencia Quimica. CAC; ArgentinaFil: San Roman, Enrique Arnoldo. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂ­mica, FĂ­sica de Los Materiales, Medioambiente y EnergĂ­a; Argentina. Universidad de Buenos Aires; ArgentinaFil: Litter, Marta Irene. Comision Nacional de Energia Atomica. Gerencia Quimica. CAC; ArgentinaFil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales; Argentin

    Surface Morphology Evolution of Chemical Vapor-Deposited Tungsten Films on Si(100)

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    Chemical vapor deposition (CVD) is used to prepare research-grade heterostructures and to produce the majority of industrially important thin films.[1] In particular, CVD tungsten films are used for many technological applications.[2,3] In CVD an external source maintains a fixed concentration of reactant molecules at a distance above the film surface.[4] Then, gas diffusion drives the molecules through the diffusion layer[2] towards the film surface. At the film interface a reaction must occur before new material is incorporated into the solid. Kinetic studies show that two growth regimes are usually present in CVD. At a low deposition temperature (low rate, regime I) the kinetics is controlled by the surface reaction, whereas at a high temperature (high rate, regime II), mass transport of reactants to, or reaction products from, the surface is the rate-controlling step.Instituto de Investigaciones FisicoquĂ­micas TeĂłricas y Aplicada

    Effects of immunosuppressive drugs on COVID-19 severity in patients with autoimmune hepatitis

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    Background: We investigated associations between baseline use of immunosuppressive drugs and severity of Coronavirus Disease 2019 (COVID-19) in autoimmune hepatitis (AIH). Patients and methods: Data of AIH patients with laboratory confirmed COVID-19 were retrospectively collected from 15 countries. The outcomes of AIH patients who were on immunosuppression at the time of COVID-19 were compared to patients who were not on AIH medication. The clinical courses of COVID-19 were classified as (i)-no hospitalization, (ii)-hospitalization without oxygen supplementation, (iii)-hospitalization with oxygen supplementation by nasal cannula or mask, (iv)-intensive care unit (ICU) admission with non-invasive mechanical ventilation, (v)-ICU admission with invasive mechanical ventilation or (vi)-death and analysed using ordinal logistic regression. Results: We included 254 AIH patients (79.5%, female) with a median age of 50 (range, 17-85) years. At the onset of COVID-19, 234 patients (92.1%) were on treatment with glucocorticoids (n = 156), thiopurines (n = 151), mycophenolate mofetil (n = 22) or tacrolimus (n = 16), alone or in combinations. Overall, 94 (37%) patients were hospitalized and 18 (7.1%) patients died. Use of systemic glucocorticoids (adjusted odds ratio [aOR] 4.73, 95% CI 1.12-25.89) and thiopurines (aOR 4.78, 95% CI 1.33-23.50) for AIH was associated with worse COVID-19 severity, after adjusting for age-sex, comorbidities and presence of cirrhosis. Baseline treatment with mycophenolate mofetil (aOR 3.56, 95% CI 0.76-20.56) and tacrolimus (aOR 4.09, 95% CI 0.69-27.00) were also associated with more severe COVID-19 courses in a smaller subset of treated patients. Conclusion: Baseline treatment with systemic glucocorticoids or thiopurines prior to the onset of COVID-19 was significantly associated with COVID-19 severity in patients with AIH.Fil: Efe, Cumali. Harran University Hospita; TurquĂ­aFil: Lammert, Craig. University School of Medicine Indianapolis; Estados UnidosFil: TaĆŸĂ§Ä±lar, Koray. Universitat Erlangen-Nuremberg; AlemaniaFil: Dhanasekaran, Renumathy. University of Stanford; Estados UnidosFil: Ebik, Berat. Gazi Yasargil Education And Research Hospital; TurquĂ­aFil: Higuera de la Tijera, Fatima. Hospital General de MĂ©xico; MĂ©xicoFil: CalÄ±ĆŸkan, Ali R.. No especifĂ­ca;Fil: Peralta, Mirta. Gobierno de la Ciudad de Buenos Aires. Hospital de Infecciosas "Dr. Francisco Javier Muñiz"; ArgentinaFil: Gerussi, Alessio. UniversitĂ  degli Studi di Milano; ItaliaFil: Massoumi, Hatef. No especifĂ­ca;Fil: Catana, Andreea M.. Harvard Medical School; Estados UnidosFil: Purnak, Tugrul. University of Texas; Estados UnidosFil: Rigamonti, Cristina. UniversitĂ  del Piemonte Orientale ; ItaliaFil: Aldana, Andres J. G.. Fundacion Santa Fe de Bogota; ColombiaFil: Khakoo, Nidah. Miami University; Estados UnidosFil: Nazal, Leyla. Clinica Las Condes; ChileFil: Frager, Shalom. Montefiore Medical Center; Estados UnidosFil: Demir, Nurhan. Haseki Training And Research Hospital; TurquĂ­aFil: Irak, Kader. Kanuni Sultan Suleyman Training And Research Hospital; TurquĂ­aFil: Melekoğlu Ellik, Zeynep. Ankara University Medical Faculty; TurquĂ­aFil: Kacmaz, HĂŒseyin. Adıyaman University; TurquĂ­aFil: Balaban, Yasemin. Hacettepe University; TurquĂ­aFil: Atay, Kadri. No especifĂ­ca;Fil: Eren, Fatih. No especifĂ­ca;Fil: Alvares da-Silva, Mario R.. Universidade Federal do Rio Grande do Sul; BrasilFil: Cristoferi, Laura. UniversitĂ  degli Studi di Milano; ItaliaFil: Urzua, Álvaro. Universidad de Chile; ChileFil: EƟkazan, Tuğçe. CerrahpaƟa School of Medicine; TurquĂ­aFil: Magro, Bianca. No especifĂ­ca;Fil: Snijders, Romee. No especifĂ­ca;Fil: Barutçu, Sezgin. No especifĂ­ca;Fil: Lytvyak, Ellina. University of Alberta; CanadĂĄFil: Zazueta, Godolfino M.. Instituto Nacional de la NutriciĂłn Salvador Zubiran; MĂ©xicoFil: Demirezer Bolat, Aylin. Ankara City Hospital; TurquĂ­aFil: Aydın, Mesut. Van Yuzuncu Yil University; TurquĂ­aFil: AmorĂłs MartĂ­n, Alexandra NoemĂ­. No especifĂ­ca;Fil: De Martin, Eleonora. No especifĂ­ca;Fil: Ekin, Nazım. No especifĂ­ca;Fil: Yıldırım, SĂŒmeyra. No especifĂ­ca;Fil: Yavuz, Ahmet. No especifĂ­ca;Fil: Bıyık, Murat. Necmettin Erbakan University; TurquĂ­aFil: Narro, Graciela C.. Instituto Nacional de la NutriciĂłn Salvador Zubiran; MĂ©xicoFil: Bıyık, Murat. Uludag University; TurquĂ­aFil: Kıyıcı, Murat. No especifĂ­ca;Fil: Kahramanoğlu Aksoy, Evrim. No especifĂ­ca;Fil: Vincent, Maria. No especifĂ­ca;Fil: Carr, Rotonya M.. University of Pennsylvania; Estados UnidosFil: GĂŒnƟar, Fulya. No especifĂ­ca;Fil: Reyes, Eira C.. Hepatology Unit. Hospital Militar Central de MĂ©xico; MĂ©xicoFil: Harputluoğlu, Murat. InönĂŒ University School of Medicine; TurquĂ­aFil: Aloman, Costica. Rush University Medical Center; Estados UnidosFil: Gatselis, Nikolaos K.. University Hospital Of Larissa; GreciaFil: ÜstĂŒndağ, YĂŒcel. No especifĂ­ca;Fil: Brahm, Javier. Clinica Las Condes; ChileFil: Vargas, Nataly C. E.. Hospital Nacional Almanzor Aguinaga Asenjo; PerĂșFil: GĂŒzelbulut, Fatih. No especifĂ­ca;Fil: Garcia, Sandro R.. Hospital Iv VĂ­ctor Lazarte Echegaray; PerĂșFil: Aguirre, Jonathan. Hospital Angeles del Pedregal; MĂ©xicoFil: Anders, Margarita. Hospital AlemĂĄn; ArgentinaFil: Ratusnu, Natalia. Hospital Regional de Ushuaia; ArgentinaFil: Hatemi, Ibrahim. No especifĂ­ca;Fil: Mendizabal, Manuel. Universidad Austral; ArgentinaFil: Floreani, Annarosa. UniversitĂ  di Padova; ItaliaFil: Fagiuoli, Stefano. No especifĂ­ca;Fil: Silva, Marcelo. Universidad Austral; ArgentinaFil: Idilman, Ramazan. No especifĂ­ca;Fil: Satapathy, Sanjaya K.. No especifĂ­ca;Fil: Silveira, Marina. University of Yale. School of Medicine; Estados UnidosFil: Drenth, Joost P. H.. No especifĂ­ca;Fil: Dalekos, George N.. No especifĂ­ca;Fil: N.Assis, David. University of Yale. School of Medicine; Estados UnidosFil: Björnsson, Einar. No especifĂ­ca;Fil: Boyer, James L.. University of Yale. School of Medicine; Estados UnidosFil: Yoshida, Eric M.. University of British Columbia; CanadĂĄFil: Invernizzi, Pietro. UniversitĂ  degli Studi di Milano; ItaliaFil: Levy, Cynthia. University of Miami; Estados UnidosFil: Montano Loza, Aldo J.. University of Alberta; CanadĂĄFil: Schiano, Thomas D.. No especifĂ­ca;Fil: Ridruejo, Ezequiel. Universidad Austral; Argentina. Consejo Nacional de Investigaciones CientĂ­ficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Parque Centenario. CEMIC-CONICET. Centro de Educaciones MĂ©dicas e Investigaciones ClĂ­nicas "Norberto Quirno". CEMIC-CONICET; ArgentinaFil: Wahlin, Staffan. No especifĂ­ca

    A Large-Scale Genetic Analysis Reveals a Strong Contribution of the HLA Class II Region to Giant Cell Arteritis Susceptibility

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    We conducted a large-scale genetic analysis on giant cell arteritis (GCA), a polygenic immune-mediated vasculitis. A case-control cohort, comprising 1,651 case subjects with GCA and 15,306 unrelated control subjects from six different countries of European ancestry, was genotyped by the Immunochip array. We also imputed HLA data with a previously validated imputation method to perform a more comprehensive analysis of this genomic region. The strongest association signals were observed in the HLA region, with rs477515 representing the highest peak (p = 4.05 × 10−40, OR = 1.73). A multivariate model including class II amino acids of HLA-DRÎČ1 and HLA-DQα1 and one class I amino acid of HLA-B explained most of the HLA association with GCA, consistent with previously reported associations of classical HLA alleles like HLA-DRB1∗04. An omnibus test on polymorphic amino acid positions highlighted DRÎČ1 13 (p = 4.08 × 10−43) and HLA-DQα1 47 (p = 4.02 × 10−46), 56, and 76 (both p = 1.84 × 10−45) as relevant positions for disease susceptibility. Outside the HLA region, the most significant loci included PTPN22 (rs2476601, p = 1.73 × 10−6, OR = 1.38), LRRC32 (rs10160518, p = 4.39 × 10−6, OR = 1.20), and REL (rs115674477, p = 1.10 × 10−5, OR = 1.63). Our study provides evidence of a strong contribution of HLA class I and II molecules to susceptibility to GCA. In the non-HLA region, we confirmed a key role for the functional PTPN22 rs2476601 variant and proposed other putative risk loci for GCA involved in Th1, Th17, and Treg cell function

    Plan de negocios 10 tiendas QĂŒem

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    Fil: Levy, Diego Ezequiel. Universidad de San Andrés. Escuela de Administración y Negocios; Argentina.Barrios, Marcel

    Tomografía computada multislice: aplicaciones en SNC y cabeza & cuello. ¿Cómo, cuåndo, por qué y para qué? Multislice Computed Tomography: applications in Central Nervous System and head and neck: How, when, why and what for?

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    La TCMS ha significado un gran avance en el diagnóstico por imågenes. Ha renovado el interés en esta técnica y ampliado claramente sus indicaciones en todas las åreas. En este artículo, repasamos su utilidad en Neurorradiología e imågenes de Cabeza y Cuello, haciendo hincapié en las mås recientes indicaciones y ejemplos de la pråctica cotidiana.MSCT has been a hugh advance in diagnostic imaging. It has renewed the interest in this technique and extended its indications in every field. In this article we review the utility of MSCT in Neuroradiology and Head & Neck imaging. We highlight the lastest indications and examples from every day practice

    Hemiconvulsion-hemiplegia-epilepsy Syndrome: Case Report and Use of Dextromethorphan

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    info:eu-repo/semantics/publishedVersio

    El Rol de la Credibilidad en la DinĂĄmica Inflacionaria

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    En esta tesis se analiza el rol de la credibilidad en la dinåmica inflacionaria y su relevancia para la estabilidad económica. A través de un enfoque teórico basado en el aprendizaje adaptativo de los agentes económicos, se examinan casos de estudio para cuantificar el impacto de la credibilidad en la inflación. Los resultados revelan que una mayor credibilidad en el gobierno, conduce a una menor inflación. A su vez, se concluye que la credibilidad no lo es todo, sino que importa también la velocidad del ajuste fiscal. Un ajuste mås råpido debilita el rol de la credibilidad en la dinåmica inflacionaria
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