1,720,987 research outputs found
Abstract 1854: Generation and characterization of mouse model of Pmepa1 conditional knockout in prostate epithelia
No full textAbstract
Introduction and Objectives: Prostate cancer (CaP) is the most common non-skin malignancy diagnosed in American men and desfunctions of androgen receptor (AR) plays an essential role in prostate tumorigenesis. PMEPA1 is an androgen and TGF-β -induced gene abundant in prostate, which was identified to degrade AR protein via NEDD4 E3 ligase mediated pathway. Reduced or loss of PMEPA1 expression, commonly detected in prostate tumors, led to increased AR protein and activated AR signaling. PMEPA1 inhibited TGF-β receptor 1 meditated signaling by a negative feedback loop. It was reported that loss of PMEPA1 facilitates bone metastasis of CaP through blocking TGF-β signaling. To further investigating the biological function of PMEP1 gene in CaP tumorigenesis, particularly via AR and TGF-β, we generated Pmepa1 prostate conditional knockout mouse model.
Methods: C57BL/6 mice were utilized for generation of Pmepa1 conditional knockout model. Pmepa1 gene was conditionally deleted in mouse prostate epithelium by ARR2PB-Cre-Lox system. Male mice of genotypes of wild-type, Pmepa1 flox/wild-type-ARR2PB-Cre, Pmepa1 flox/flox-ARR2PB-Cre were euthanized at the age of 3 months for analysis. The prostate tissue was collected for frozen and formalin fixation for histology analysis, and other major organs including heart, lung, liver, spleen, bladder and testis were also collected for control. The tissue were sectioned and stained with Hematoxylin & Erosin (H&E). Total RNA and protein were harvested by homogenizing tissue. The protein levels of Pmepa1, Ar and Nkx3.1 were analyzed by immunohistochemistry (IHC) and immunoblotting, and the transcript levels of these genes were evaluated by in situ hybridization (ISH) and quantitative-PCR (Q-PCR).
Results: The expression of Pmepa1 protein was found to focus on lateral lobe, consistent with Ar protein expression pattern. The data of Q-PCR and ISH showed that transcript level of Pmepa1 was dramatically suppressed in Pmepa1 flox/flox and flox/wild-type ARR2PB-Cre mice. Compared to wild-type ones, Pmepa1 protein was shown significantly decreased in heterozygous and homozygous knockout mice by immunoblotting and IHC staining. And the protein level of Ar was stronger in Pmepa1 conditional deleted mouse. There was no dramatic morphology change in mouse prostate gland by H&E staining.
Conclusions: Conditional deletion of Pmepa1 gene in mouse prostate epithelium led to enhanced Ar protein and activating Ar signaling. The effects of Pmepa1 gene loss in mouse prostate gland on other signaling such as TGF-β and prostate tumorigenesis are needed to be further evaluated.
Funding: This study was supported by CPDR, USUHS, HU0001-10-2-0002 to DGM.
Citation Format: Hua Li, Shashwat Sharad, Talai Barbiev, Yingjie Song, Denise Young, Taduru Sreenath, Albert Dobi, Shiv Srivastava. Generation and characterization of mouse model of Pmepa1 conditional knockout in prostate epithelia [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 1854. doi:10.1158/1538-7445.AM2017-1854</jats:p
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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