1,720,959 research outputs found
Part I: Analysis of the Biological Activity of Acidic Polysaccharides Extracted from Marine Organisms Sarcotragus spinosulus and Holothuria tubulosa on Tumor Cell Lines MCF-7 and MDA-MB-23 Part II: Role of LRRK2 in Parkinson's Disease: Insights into Vesicular Trafficking and Neuroinflammation
No full textIn recent years, bioactive compounds extracted from primitive marine organisms have gained attention
for their potential anticancer properties. In this study, acidic polysaccharides (APs) from Holothuria
tubulosa and Sarcotragus spinosulus were investigated for their effects on MDA-MB-231 and MCF-7
breast cancer cells. Holothuria-derived APs (Ht1, Ht2) exhibited anticancer potential, with Ht1 reducing
cell viability and migration while promoting an epithelial-like phenotype in MDA-MB-231 cells. Ht1 also
upregulated E-cadherin, while Ht2 modulated matrix metalloproteinase expression. In contrast,
Sarcotragus-derived AP (Ss1) increased MCF-7 viability, downregulated E-cadherin, and upregulated
Vimentin, MT1-MMP, and MMP2, indicating EMT-like changes and potential tumor-promoting effects. No
effects were observed in 3D spheroids, likely due to the hydrophilic nature of APs. These findings
indicate Holothuria APs as potential anticancer agents and possible pro-tumorigenic effects of
Sarcotragus AP in MCF-7 cells.
Pathological mutations in the LRRK2 gene are the major genetic cause of Parkinson’s disease. LRRK2
function has been linked to the control of vesicle dynamics and in the regulation of the innate immune
system, but the molecular mechanisms are not fully elucidated. In this thesis we showed how exocyst
complex inhibition rescues mutant LRRK2 pathogenic phenotype in cellular and drosophila models.
Furthermore, prolonged exocyst inhibition leads to a reduction in the LRRK2 protein level, supporting
the role of the exocyst complex in the LRRK2 pathway. Using Drosophila LRRK2 models, we were able to
demonstrate a significant contribution of glial cells to the LRRK2 pathological phenotype. Furthermore,
in Drosophila, neurodegeneration is associated with a significant increase in specific inflammatory
peptides. Our study identifies the exocyst complex as a critical modulator of LRRK2 pathology and
underscores the role of glial cells in neurodegenerationIn recent years, bioactive compounds extracted from primitive marine organisms have gained attention for their potential anticancer properties. In this study, acidic polysaccharides (APs) from Holothuria tubulosa and Sarcotragus spinosulus were investigated for their effects on MDA-MB-231 and MCF-7 breast cancer cells. Holothuria-derived APs (Ht1, Ht2) exhibited anticancer potential, with Ht1 reducing cell viability and migration while promoting an epithelial-like phenotype in MDA-MB-231 cells. Ht1 also upregulated E-cadherin, while Ht2 modulated matrix metalloproteinase expression. In contrast, Sarcotragus-derived AP (Ss1) increased MCF-7 viability, downregulated E-cadherin, and upregulated Vimentin, MT1-MMP, and MMP2, indicating EMT-like changes and potential tumor-promoting effects. No effects were observed in 3D spheroids, likely due to the hydrophilic nature of APs. These findings indicate Holothuria APs as potential anticancer agents and possible pro-tumorigenic effects of Sarcotragus AP in MCF-7 cells.
Pathological mutations in the LRRK2 gene are the major genetic cause of Parkinson’s disease. LRRK2 function has been linked to the control of vesicle dynamics and in the regulation of the innate immune system, but the molecular mechanisms are not fully elucidated. In this thesis we showed how exocyst complex inhibition rescues mutant LRRK2 pathogenic phenotype in cellular and drosophila models. Furthermore, prolonged exocyst inhibition leads to a reduction in the LRRK2 protein level, supporting the role of the exocyst complex in the LRRK2 pathway. Using Drosophila LRRK2 models, we were able to demonstrate a significant contribution of glial cells to the LRRK2 pathological phenotype. Furthermore, in Drosophila, neurodegeneration is associated with a significant increase in specific inflammatory peptides. Our study identifies the exocyst complex as a critical modulator of LRRK2 pathology and underscores the role of glial cells in neurodegeneration
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
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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