1,720,958 research outputs found
A Chemical Genetic Strategy to Study Vip1 in Inositol Pyrophosphate Signaling
No full textThe water-soluble and highly phosphorylated inositol pyrophosphates (PP-IPs) are a
conserved class of signaling molecules. Genetic studies in yeast have implicated the PPIPs in a variety of roles, including nutrient sensing and response to environmental stress, but have largely proven ineffective in decoding their mechanisms of action. This thesis focuses on developing a chemical genetic approach for an in-depth analysis of the signaling roles of Vip1, an ATP-grasp kinase, and its corresponding PP-IP products in Saccharomyces cerevisiae. The technique relies on strategically introducing mutations into the kinase active site and developing orthogonal ATP analogs. I report the successful identification and engineering of analog sensitive alleles of Vip1 (Vip1-AS) that maintain functionality both biochemically and in yeast. Furthermore, I use a structure-guided approach to develop a small class of biorthogonal ATP-competitive pyridopyrimidines, and demonstrate their potency against and selectivity for Vip1-AS in vitro. Though inhibition studies in yeast are thus far incomplete, preliminary results provide promising evidence for the successful creation of an appropriate chemical genetic system for Vip1. Once verified and optimized, the system can be not only applied to investigate Vip1¿s
role in transcriptional and metabolic regulation, but also extended to examine
homologues in higher-order eukaryotes and structurally similar enzymes within the ATPgrasp superfamily
Bridging radiotherapy before chimeric antigen receptor T cells for B-cell lymphomas: An ILROG multicenter study
No full textDespite the increasing utilization of bridging radiotherapy (Br-RT), its impact on chimeric antigen receptor T-cell therapy (CAR-T) efficacy and toxicity remains poorly characterized. We retrospectively reviewed patients with relapsed/refractory B-cell lymphomas (BCLs) who received Br-RT followed by CAR-T from 2018 to 2020 across 10 institutions. Br-RT toxicities were graded per Common Terminology Criteria for Adverse Events version 5.0, and cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS) per American Society for Transplantation and Cellular Therapy Consensus Guidelines. One hundred seventy-two patients (168 large BCL) received Br-RT before axicabtagene ciloleucel (73%), tisagenlecleucel (24%), or brexucabtagene autoleucel (2%). At leukapheresis, most patients (74%) had advanced-stage disease and 39% had bulky disease measuring ≥10cm. Comprehensive Br-RT was administered to 39% and bridging systemic therapy to 35%. Among all patients, grade ≥3 Br-RT toxicity occurred in 2% (1 grade 5 toxicity), grade ≥3 CRS in 9%, and grade ≥3 ICANS in 24%. Median follow-up was 31.3 months. Two-year progression-free survival (PFS) and overall survival (OS) were 38% and 53%, respectively. On multivariable analysis, comprehensive Br-RT was associated with superior PFS (hazard ratio [HR], 0.38; P \u3c .001) and OS (HR, 0.48; P = .011). Patients with lactate dehydrogenase (LDH) normalization after Br-RT (high pre-Br-RT LDH, normal post-Br-RT LDH) had superior PFS and OS compared with those with high post-Br-RT LDH and similar PFS and OS compared with those with normal baseline LDH. In this particularly high-risk cohort, Br-RT before CAR-T demonstrates an acceptable toxicity profile with favorable clinical outcomes compared with historical controls. Comprehensive Br-RT and LDH normalization after Br-RT may be associated with superior PFS and OS
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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