1,720,958 research outputs found
Telmisartan and losartan: The marked differences between their chemical and pharmacological properties may explain the difference in therapeutic efficacy in hospitalized patients with COVID-19
No full textFil: Rothlin, Rodolfo Pedro. Sociedad Argentina de Farmacología Clínica; Argentina.Fil: Pelorosso, Facundo Germán. Hospital de Alta Complejidad El Calafate SAMIC. Servicio de Anatomía Patológica; Argentina.Fil: Duarte, Mariano. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas "José de San Martín". División de Cardiología. Laboratorio de Hipertensión; Argentina.Fil: Nicolosi, Liliana. Hospital Español de Buenos Aires. División de Cardiología; Argentina.Fil: Fernández Criado, Ignacio. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas "José de San Martín". Sección de Tecnología Educativa e Informática Médica; Argentina.Fil: Salgado, María Victoria. CEDES. Centro de Estudios de Estado y Sociedad. Área de Salud, Economía y Sociedad; Argentina.Fil: Vetulli, Héctor. Sanatorio Otamendi y Miroli. Servicio de Electrofisiología Cardíaca, Arritmias y Marcapasos; Argentina
Farmacogenética en psiquiatría: ¿qué tan lejos estamos de su aplicación clínica?
Full text linkLa farmacogenética estudia cómo la variabilidad genética influye en la respuesta de los pacientes a los fármacos. Esta disciplina tendría mayor impacto en la práctica de aquellas especialidades médicas que tratan enfermedades complejas en las que la respuesta terapéutica es insuficiente y/o tiene elevados costos como es el caso de la psiquiatría. La presente es una revisión narrativa en la que se analizan los principales resultados de los estudios de farmacogenética realizados con los grupos de psicofármacos más relevantes y se analiza que falta para la incorporación de estos avances a nuestra práctica cotidiana. Se concluye que, a pesar de los notables progresos en el campo de la farmacogenética en los últimos 10 años, los estudios en psiquiatría no han sido concluyentes y que la utilización clínica de las pruebas de farmacogenética es aún muy limitada. No obstante, hay ciertos elementos alentadores acerca de la posibilidad de aplicación de estas herramientas para optimizar los tratamientos psiquiátricos.Pharmacogenetics studies how genetic variation influences the response of patients to drugs. This discipline has a greater impact in those medical specialties that treat complex diseases in which the therapeutic response is insufficient and/or have high costs such as psychiatry. This is a narrative review in which we analyze the main results of pharmacogenetic studies performed with the most relevant groups of psychoactive drugs and discusses missing for incorporating these advances into our daily practice. We conclude that despite the remarkable progress in the field of Pharmacogenetics in the last 10 years, studies in psychiatry have been inconclusive and the clinical use of pharmacogenetic testing is still limited. However, there are some encouraging elements about the applicability of these tools for the improvement of psychiatric treatments.Fil: Daray, Federico Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Cátedra de Farmacología; ArgentinaFil: Maffia, Paulo Cesar. Universidad Nacional de Quilmes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rothlin, Rodolfo Pedro. Universidad de Buenos Aires. Facultad de Medicina. Cátedra de Farmacología; ArgentinaFil: Errasti, Andrea Emilse. Universidad de Buenos Aires. Facultad de Medicina. Cátedra de Farmacología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
-759C > T polymorphism of the HTR2C gene is associated with second generation antipsychotic-induced weight gain in female patients with schizophrenia
Full text linkIntroduction: The HTR2C gene is an important candidate in pharmacogenetic studies of antipsychotic-induced weight gain (AIWG). However, inconsistent results have been obtained. The present study investigated the association between -759C > T, functional polymorphism of the HTR2C receptor, and AIWG. Methods: A prospective cohort of 48 female inpatients with schizophrenia and related illness treated according to normal clinical practice with second generation antipsychotics (SGAs) risperidone, clozapine, quetiapine, and olanzapine were evaluated. Patients were weighted at admission and again at 6 weeks of hospitalization. Weight gain was defined as an increase ≥ 7 % of baseline weight. The association between polymorphisms HTR2C and weight gain was evaluated. Multiple logistic regression was run to determine potential confounders. Results: Patients with the T allele at position -759 (TT or CT) gained less weight as compared to patients who did not have the allele. This association was not affected by possible confounding factors such as age, baseline BMI, and prior psychopharmacological treatment. Discussion: The T allele at position -759 protects against AIWG in female patients with schizophrenia.Fil: Daray, Federico Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina; ArgentinaFil: Rodante, Demián. Universidad de Buenos Aires. Facultad de Medicina; Argentina. Hospital “Braulio A. Moyano”; ArgentinaFil: Carosella, Laura G.. Hospital “Braulio A. Moyano”; ArgentinaFil: Silva, María Elena. Hospital “Braulio A. Moyano”; ArgentinaFil: Martínez, Melina María Belén. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; ArgentinaFil: Busch, María V. Fernández. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; ArgentinaFil: Faccone, Diego Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; ArgentinaFil: Rothlin, Rodolfo Pedro. Universidad de Buenos Aires. Facultad de Medicina; ArgentinaFil: Maffia, Paulo Cesar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Microbiología Molecular; Argentin
Human umbilical vein: Involvement of cyclooxygenase-2 pathway in bradykinin B 1 receptor-sensitized responses
Full text linkIn isolated human umbilical vein (HUV), the contractile response to des-Arg9-bradykinin (des-Arg9-BK), selective BK B1 receptor agonist, increases as a function of the incubation time. Here, we evaluated whether cyclooxygenase (COX) pathway is involved in BK B1-senzitized response obtained in 5-h incubated HUV rings. The effect of different concentrations of indomethacin, sodium salicylate, ibuprofen, meloxicam, lysine clonixinate or NS-398 administrated 30 min before concentration-response curves (CRC) was studied. All treatments produced a significant rightward shift of the CRC to des-Arg9-BK in a concentration-dependent manner, which provides pharmacological evidence that COX pathway is involved in the BK B1 responses. Moreover, in this tissue, the NS-398 pKb (5.2) observed suggests that COX-2 pathway is the most relevant. The strong correlation between published pIC50 for COX-2 and the NSAIDs' pKbs estimated further supports the hypothesis that COX-2 metabolites are involved in BK B1 receptor-mediated responses. In other rings, indomethacin (30, 100 μmol/l) or NS-398 (10, 30 μmol/l) produced a significant rightward shift of the CRC to BK, selective BK B2 agonist, and its pKbs were similar to the values to inhibit BK B1 receptor responses, suggesting that COX-2 pathway also is involved in BK B2 receptor responses. Western blot analysis shows that COX-1 and COX-2 isoenzymes are present before and after 5-h in vitro incubation and apparently COX-2 does not suffer additional induction.Fil: Errasti, Andrea Emilse. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Farmacología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rey Ares, Veronica. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Farmacología; ArgentinaFil: Daray, Federico Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Farmacología; ArgentinaFil: Rogines Velo, M. P.. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Farmacología; ArgentinaFil: Sardi, Sergio Pablo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Farmacología; ArgentinaFil: Paz, Cristina del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; ArgentinaFil: Podesta, Ernesto Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; ArgentinaFil: Rothlin, Rodolfo Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Investigaciones Biomédicas. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Investigaciones Biomédicas; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
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