1,720,986 research outputs found
ADENOSINE MODULATES THE DOPAMINERGIC FUNCTION IN THE NIGRO-STRIATAL SYSTEM BY INTERACTING WITH STRIATAL DOPAMINE DEPENDENT ADENYLATE-CYCLASE
No full textBehavioral and pharmacological evidences suggest that dopaminergic mechanisms in striatum might be counteracted by adneosine or potentiated by its pharmacological antagonists methylxanthines. To test whether adenosine modulation of the dopaminergic function could be, at least in part, due to an interaction at the level of the adenylate cyclase complex, we studied the effects of the adenosine analog R-Phenyl-isopropil-adenosine (R-PIA) on basal and dopamine-sensitive adenylate cyclase in rat striatum. R-PIA, which interacts with both adenosine A1-inhibitory and A2-stimulatory receptors, dose-dependently inhibited the stimulation induced by dopamine, and seemed to utilize the same pool of enzyme linked to dopaminergic D1 receptors. Two experimental approaches leading to supersensitivity of striatal dopaminergic receptors, (i.e., 6-hydroxy-dopamine injection in substantia nigra and reserpine administration) also induced upregulation of adenosine-dependent adenylate cyclase in striatum, and altered R-PIA modulation of dopamine-sensitive adenylate cyclase. Conversely, after subchronic treatment with neuroleptics such as haloperidol or sulpiride, upregulation of 3H-Spiroperidol binding in striatum was not associated with changes of R-PIA dependent adenylate cyclase in this area. It is concluded that adenosine might modulate post-synaptic responses to dopamine via adenosine receptors which functionally interact with dopaminergic D1 receptors in striatum
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
Modulatori del recettore gpr17
No full textLe presente invenzione si riferisce generalmente a composti chimici che agiscono attraverso il recettore GPR17 per l'uso nel trattamento di malattie, in particolare per l'uso in malattie neurodegenerative croniche e/o acute, sclerosi multipla preferibilmente, malattie infiammatorie, patologie che coinvolgono il sistema immunitario, malattie cardiovascolari, renali malattie
Nonprofit foundations spur translational research
No full textEvery year, hundreds of promising basic discoveries in the pharmacological field are lost and will never have a chance to be exploited for patients due to difficulties in clinical translation. This is especially true for most neurodegenerative disorders lacking disease-modifying therapies. Here we present the current scenario and our vision of a 'collective-impact' multistakeholder approach to expedite the development of new drugs
Modulatori del recettore gpr17
No full textLe presente invenzione si riferisce generalmente a composti chimici che agiscono attraverso il recettore GPR17 per l'uso nel trattamento di malattie, in particolare per l'uso in malattie neurodegenerative croniche e/o acute, sclerosi multipla preferibilmente, malattie infiammatorie, patologie che coinvolgono il sistema immunitario, malattie cardiovascolari, malattie renali
GPR17 Receptor Modulators
No full textThe present invention relates to chemical compounds acting through GPR17 receptor for use in the treatment of diseases, in particular for use in chronic and/or acute neurodegenerative diseases, preferably Multiple Sclerosis, inflammatory diseases, pathologies involving the immune system, cardiovascular diseases, renal diseases
GPR17 Receptor Modulators
No full textThe present invention relates to chemical compounds acting through GPR17 receptor for use in the treatment of diseases, in particular for use in chronic and/or acute neurodegenerative diseases, preferably Multiple Sclerosis, inflammatory diseases, pathologies involving the immune system, cardiovascular diseases, renal diseases
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