299 research outputs found
Las Vegas Locals as Gamblers and Hosts to Visiting Friends and Family: Characteristics and Gaming Behavior
Local gamblers are an important market segment for casino marketers providing a reliable source of revenue during slow periods. This paper presents selected gaming behavior of local residents in the Las Vegas area, linking socio-demographic characteristics with gaming behavior. In addition, this article examines the relationships of Las Vegas area locals and their visiting friends and family members in two aspects. First, we identified the influence local residents have on visiting friends and family in terms of recommendations made regarding gambling in general and specific gaming locations. Second, this article describes how visiting friends and family influence local residents in terms of gaming behavior and additional spending
The Influence of Director Stock Ownership and Board Discussion Transparency on Financial Reporting Quality
Seventy-two active corporate directors participate in an experiment where management insists on aggressive recognition of revenue, but the chief audit executive proposes a more conservative approach. Results indicate interactive effects of director stock ownership and the transparency of director decisions. Stock-owning directors are more likely to oppose management’s attempts to manage earnings when transparency increases. For non-stock owning directors, however, increasing transparency does not affect the likelihood that directors oppose management’s attempts to manage earnings. The current study challenges suppositions that equate director stock ownership with improved financial reporting and higher corporate governance quality, and it provides evidence that increased transparency is beneficial when director compensation plans threaten director independence
Micropatterned Cell–Cell Interactions Enable Functional Encapsulation of Primary Hepatocytes in Hydrogel Microtissues
Drug-induced liver injury is a major cause of drug development failures and postmarket withdrawals. In vitro models that incorporate primary hepatocytes have been shown to be more predictive than model systems which rely on liver microsomes or hepatocellular carcinoma cell lines. Methods to phenotypically stabilize primary hepatocytes ex vivo often rely on mimicry of hepatic microenvironmental cues such as cell–cell interactions and cell–matrix interactions. In this work, we sought to incorporate phenotypically stable hepatocytes into three-dimensional (3D) microtissues, which, in turn, could be deployed in drug-screening platforms such as multiwell plates and diverse organ-on-a-chip devices. We first utilize micropatterning on collagen I to specify cell–cell interactions in two-dimensions, followed by collagenase digestion to produce well-controlled aggregates for 3D encapsulation in polyethylene glycol (PEG) diacrylate. Using this approach, we examined the influence of homotypic hepatocyte interactions and composition of the encapsulating hydrogel, and achieved the maintenance of liver-specific function for over 50 days. Optimally preaggregated structures were subsequently encapsulated using a microfluidic droplet-generator to produce 3D microtissues. Interactions of engineered hepatic microtissues with drugs was characterized by flow cytometry, and yielded both induction of P450 enzymes in response to prototypic small molecules and drug–drug interactions that give rise to hepatotoxicity. Collectively, this study establishes a pipeline for the manufacturing of 3D hepatic microtissues that exhibit stabilized liver-specific functions and can be incorporated into a wide array of emerging drug development platforms.National Institutes of Health (U.S.) (Grant UH2 EB017103)National Institutes of Health (U.S.) (Grant R01 EB008396)National Institutes of Health (U.S.) (Grant R01 DK85713)National Cancer Institute (U.S.) (Koch Institute Support (Core) Grant P30-CA14051)American Gastroenterological Association (Research Scholar Fellowship)National Science Foundation (U.S.). Graduate Research Fellowship (1122374
Chapitre 26 - Évolution du mouvement One Health aux États-Unis
Introduction Tout au long de l’histoire des États-Unis, la collaboration entre les secteurs humains, animaux et environnementaux a fluctué selon la demande conjoncturelle de fonctionnement interdisciplinaire. Plusieurs événements du début du xxie siècle ont ravivé l’intérêt pour le concept One Health, défini au sens large comme l’interconnectivité des secteurs de la santé humaine, animale et environnementale. En 1992, l’..
Directional autocorrelation function of the polarization-mode dispersion vector
ABSTRACT The autocorrelation function (ACF) for the direction of the principal state of polarization (PSP) vector is reported. The analytical results are compared with the simulation results. It is shown that the magnitude and the directional ACF of the PSP vector are not independent. The directional correlation bandwidth for the PSP vector is verified to be narrower than that of the PSP magnitude
The effects of tumor treating fields and temozolomide in MGMT expressing and non-expressing patient-derived glioblastoma cells
AbstractA recent Phase 3 study of newly diagnosed glioblastoma (GBM) demonstrated the addition of tumor treating fields (TTFields) to temozolomide (TMZ) after combined radiation/TMZ significantly increased survival and progression free survival. Preliminary data suggested benefit with both methylated and unmethylated O-6-methylguanine-DNA methyl-transferase (MGMT) promoter status. To date, however, there have been no studies to address the potential interactions of TTFields and TMZ. Thus, the effects of TTFields and TMZ were studied in vitro using patient-derived GBM stem-like cells (GSCs) including MGMT expressing (TMZ resistant: 12.1 and 22GSC) and non-MGMT expressing (TMZ sensitive: 33 and 114GSC) lines. Dose-response curves were constructed using cell proliferation and sphere-forming assays. Results demonstrated a ⩾10-fold increase in TMZ resistance of MGMT-expressing (12.1GSCs: IC50=160μM; 22GSCs: IC50=44μM) compared to MGMT non-expressing (33GSCs: IC50=1.5μM; 114GSCs: IC50=5.2μM) lines. TTFields inhibited 12.1 GSC proliferation at all tested doses (50–500kHz) with an optimal frequency of 200kHz. At 200kHz, TTFields inhibited proliferation and tumor sphere formation of both MGMT GSC subtypes at comparable levels (12.1GSC: 74±2.9% and 38±3.2%, respectively; 22GSC: 61±11% and 38±2.6%, respectively; 33GSC: 56±9.5% and 60±7.1%, respectively; 114 GSC: 79±3.5% and 41±4.3%, respectively). In combination, TTFields (200kHz) and TMZ showed an additive anti-neoplastic effect with equal efficacy for TTFields in both cell types (i.e., ± MGMT expression) with no effect on TMZ resistance. This is the first demonstration of the effects of TTFields on cancer stem cells. The expansion of such studies may have clinical implications
Increased Gene Expression of RUNX2 and SOX9 in Mesenchymal Circulating Progenitors Is Associated with Autophagy during Physical Activity
Lack of physical exercise is considered an important risk factor for chronic diseases. On the contrary, physical exercise reduces the morbidity rates of obesity, diabetes, bone disease, and hypertension. In order to gain novel molecular and cellular clues, we analyzed the effects of physical exercise on differentiation of mesenchymal circulating progenitor cells (M-CPCs) obtained from runners. We also investigated autophagy and telomerase-related gene expression to evaluate the involvement of specific cellular functions in the differentiation process. We performed cellular and molecular analyses in M-CPCs, obtained by a depletion method, of 22 subjects before (PRE RUN) and after (POST RUN) a half marathon performance. In order to prove our findings, we performed also in vitro analyses by testing the effects of runners' sera on a human bone marrow-derived mesenchymal stem (hBM-MSC) cell line. PCR array analyses of PRE RUN versus POST RUN M-CPC total RNAs put in evidence several genes which appeared to be modulated by physical activity. Our results showed that physical exercise promotes differentiation. Osteogenesis-related genes as RUNX2, MSX1, and SPP1 appeared to be upregulated after the run; data showed also increased levels of BMP2 and BMP6 expressions. SOX9, COL2A1, and COMP gene enhanced expression suggested the induction of chondrocytic differentiation as well. The expression of telomerase-associated genes and of two autophagy-related genes, ATG3 and ULK1, was also affected and correlated positively with MSC differentiation. These data highlight an attractive cellular scenario, outlining the role of autophagic response to physical exercise and suggesting new insights into the benefits of physical exercise in counteracting chronic degenerative conditions
Concert recording 2016-03-01
[Track 01]. Oh! Had I Jubal\u27s lyre from Joshua / George Frideric Handel -- [Track 02]. Tu lo sai / Giuseppe Torelli -- [Track 03]. Die Forelle / Franz Schubert -- [Track 04]. Puisque l\u27aube grandit / Gabriel Faure -- [Track 05]. Die Spröde ; [Track 06]. Die Bekehrte / Hugo Wolf -- [Track 07]. Le sommeil ; [Track 08]. Quelle aventure! ; Ba, be, bi, bo, bu ; Lune d\u27Avril / Francis Poulenc -- [Track 09]. New York lights from A view from the bridge / William Bolcom -- [Track 10]. Suleika I / Franz Schubert -- [Track 11]. Summertime from Porty and Bess / George Gershwin
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