1,793 research outputs found
Nation branding: what is being branded?
Nation branding and nation brand are two different concepts. A nation has a brand image with or without nation branding. This paper examines the concept of nation branding, focusing on the central question of what is being branded. It differentiates nation branding from product branding, and draws comparisons between nation branding and product-country image. Paradoxical issues around the concept and the wider context in which nation branding can be applied are also discussed. More research is needed to find out if and how nation branding could help the economic development in a country. As many other non-marketing factors also affect a nation’s image the role played by nation branding may turn out to be only a modest one
Transcriptomes reflect the phenotypes of undifferentiated, granulocyte and macrophage forms of HL-60/S4 cells
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here by permission of Taylor & Francis for personal use, not for redistribution. The definitive version was published in Nucleus 8 (2017): 222-237, doi:10.1080/19491034.2017.1285989.In order to understand the chromatin changes underlying differential gene expression during
induced differentiation of human leukemic HL-60/S4 cells, we conducted RNA-Seq analysis
on quadruplicate cultures of undifferentiated, granulocytic- and macrophage-differentiated
cell forms. More than half of mapped genes exhibited altered transcript levels in the
differentiated cell forms. In general, more genes showed increased mRNA levels in the
granulocytic form and in the macrophage form, than showed decreased levels. The majority
of Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways were significantly enriched in genes that exhibited differential transcript levels after either RA or TPA
treatment. Changes in transcript levels for groups of genes with characteristic protein
phenotypes, such as genes encoding cytoplasmic granular proteins, nuclear envelope and
cytoskeletal proteins, cell adhesion proteins, and proteins involved in the cell cycle and
apoptosis illustrate the profound differences among the various cell states. In addition to the
transcriptome analyses, companion karyotyping by M-FISH of undifferentiated HL-60/S4
cells revealed a plethora of chromosome alterations, compared to normal human cells. The
present mRNA profiling provides important information related to nuclear shape changes
(e.g., granulocyte lobulation), deformability of the nuclear envelope and linkage between the
nuclear envelope and cytoskeleton during induced myeloid chromatin differentiation.DMW
thanks the Bay and Paul Foundations for support. ALO and DEO thank the College of
Pharmacy at UNE for their support. ALO and DEO are recipients of a 2015 UNE Mini-
Grant from the Vice President for Research and Scholarship. ALO and DEO thank the
German Cancer Research Center (Heidelberg) for the awards of Guest Scientist fellowships.2018-02-0
Branding the nation: Towards a better understanding
This paper aims to clarify some misunderstanding about nation branding. It examines the origins and interpretations of the concept, and draws a comparison between nation branding and commercial branding. A new definition is offered that emphasises the need to shift from “branding” the nation to nation image management
Nucleosome repositioning during differentiation of a human myeloid leukemia cell line
Cell differentiation is associated with changes in chromatin organization and gene expression. In this study, we examine chromatin structure following differentiation of the human myeloid leukemia cell line (HL-60/S4) into granulocytes with retinoic acid (RA) or into macrophage with phorbol ester (TPA). We performed ChIP-seq of histone H3 and its modifications, analyzing changes in nucleosome occupancy, nucleosome repeat length, eu-/heterochromatin redistribution and properties of epichromatin (surface chromatin adjacent to the nuclear envelope). Nucleosome positions changed genome-wide, exhibiting a specific class of alterations involving nucleosome loss in extended (∼1kb) regions, pronounced in enhancers and promoters. Genes that lost nucleosomes at their promoters showed a tendency to be upregulated. On the other hand, nucleosome gain did not show simple effects on transcript levels. The average genome-wide nucleosome repeat length (NRL) did not change significantly with differentiation. However, we detected an approximate 10 bp NRL decrease around the haematopoietic transcription factor (TF) PU.1 and the architectural protein CTCF, suggesting an effect on NRL proximal to TF binding sites. Nucleosome occupancy changed in regions associated with active promoters in differentiated cells, compared with untreated HL-60/S4 cells. Epichromatin regions revealed an increased GC content and high nucleosome density compared with surrounding chromatin. Epichromatin showed depletion of major histone modifications and revealed enrichment with PML body-associated genes. In general, chromatin changes during HL-60/S4 differentiation appeared to be more localized to regulatory regions, compared with genome-wide changes among diverse cell types studied elsewhere
Soft power: Power of attraction or confusion?
Despite its popularity soft power remains power of confusion. The paper examines the concept, with a special focus on the nature and sources of soft power. Nye’s notion of soft power is largely ethnocentric and based on the assumption that there is a link between attractiveness and the ability to influence others in international relations. This poses two problems: Firstly, a country has many different actors. Some of them like the attraction and others don’t. Whether the attraction will lead to the ability to influence the policy of the target country depends on which groups in that country find it attractive and how much control they have on policymaking. Secondly, policymaking at the state level is far more complicated than at the personal level; and has different dynamics that emphasise the rational considerations. This leaves little room for emotional elements thus significantly reducing the effect of soft power. Given the nature of soft power being uncontrollable and unpredictable, it would be impossible to wield soft power in any organised and coordinated fashion as Nye suggested. Furthermore, the relationship between two countries is shaped by many complex factors. It is ultimately decided by the geopolitics and strategic interests of nations, in which soft power may play only a limited role. The paper also discusses the link between soft power and nation branding as both concepts are concerned with a nation’s influence on the world stage. Public diplomacy is a subset of nation branding that focuses on the political brand of a nation; whereas nation branding is about how a nation as whole to reshape the international opinions. A successful nation branding campaign will help create a more favourable and lasting image among the international audience thus further enhancing a country’s soft power
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Characterizing the Distribution and Rates of Microbial Sulfate Reduction at Middle Valley Hydrothermal Vents
Few studies have directly measured sulfate reduction at hydrothermal vents, and relatively little is known about how environmental or ecological factors influence rates of sulfate reduction in vent environments. A better understanding of microbially mediated sulfate reduction in hydrothermal vent ecosystems may be achieved by integrating ecological and geochemical data with metabolic rate measurements. Here we present rates of microbially mediated sulfate reduction from three distinct hydrothermal vents in the Middle Valley vent field along the Juan de Fuca Ridge, as well as assessments of bacterial and archaeal diversity, estimates of total biomass and the abundance of functional genes related to sulfate reduction, and in situ geochemistry. Maximum rates of sulfate reduction occurred at in all three deposits. Pyrosequencing and functional gene abundance data reveal differences in both biomass and community composition among sites, including differences in the abundance of known sulfate reducing bacteria. The abundance of sequences for Thermodesulfovibro-like organisms and higher sulfate reduction rates at elevated temperatures, suggests that Thermodesulfovibro-like organisms may play a role in sulfate reduction in warmer environments. The rates of sulfate reduction presented here suggest that - within anaerobic niches of hydrothermal deposits - heterotrophic sulfate reduction may be quite common and can contribute to secondary productivity, underscoring the potential role of this process in both sulfur and carbon cycling at vents.Organismic and Evolutionary Biolog
The History And Mystery Of Chromatin
UNE research professors Ada and Don Olins present some of their published and unpublished data on chromatin. The name “Chromatin” was given by W. Flemming (~1880) to the nuclear substance that stains strongly in a light microscope. During the 1940’s to 60’s, it became clear that chromatin is a complex of (anionic) double-stranded DNA with an equal mass of highly basic histone proteins. Following the success of fiber x-ray diffraction in deciphering helical macromolecular structures (e.g., the single peptide alpha-helix, DNA double helix, collagen triple helix, etc.), it became “reasonable” to postulate that chromatin is a helix of nucleohistone. Electron microscopic evidence appeared to support this concept. In 1973-74 the chromatin field witnessed a significant paradigm shift, when our electron micrographs and parallel biochemical data (from other labs) demonstrated that the chromatin polymer is a “string-of-beads”, which were named “nucleosomes”. The “core” nucleosome contains ~160 bp of DNA, wrapped around an inner spool of 8 histones (two each of histones H3, H4, H2A and H2B) related by a dyad axis. Following the discovery of nucleosomes, there was again a profusion of chromatin helical models (e.g., “30 nm fibers”). Unfortunately, there is very little support for such higher-order structures in vivo. Since the discovery of the nucleosome, we have focused on a number of questions related to in situ higher-order chromatin structure: What controls the shape of the interphase nucleus? What are the properties of the chromatin “surface”, adjacent to the nuclear envelope? What happens to chromatin during hyperosmotic dehydration of the live cell?https://dune.une.edu/pharmsci_facpres/1002/thumbnail.jp
Cytoskeletal influences on nuclear shape in granulocytic HL-60 cells
BACKGROUND: During granulopoiesis in the bone marrow, the nucleus differentiates from ovoid to lobulated shape. Addition of retinoic acid (RA) to leukemic HL-60 cells induces development of lobulated nuclei, furnishing a convenient model system for nuclear differentiation during granulopoiesis. Previous studies from our laboratory have implicated nuclear envelope composition as playing important roles in nuclear shape changes. Specifically noted were: 1) a paucity of lamins A/C and B1 in the undifferentiated and RA treated cell forms; 2) an elevation of lamin B receptor (LBR) during induced granulopoiesis. RESULTS: The present study demonstrates that perturbation of cytoskeletal elements influences nuclear differentiation of HL-60 cells. Because of cytotoxicity from prolonged exposure to cytoskeleton-modifying drugs, most studies were performed with a Bcl-2 overexpressing HL-60 subline. We have found that: 1) nocodazole prevents RA induction of lobulation; 2) taxol induces lobulation and micronuclear formation, even in the absence of RA; 3) cytochalasin D does not inhibit RA induced nuclear lobulation, and prolonged exposure induces nuclear shape changes in the absence of RA. CONCLUSIONS: The present results, in the context of earlier data and models, suggest a mechanism for granulocytic nuclear lobulation. Our current hypothesis is that the nuclear shape change involves factors that increase the flexibility of the nuclear envelope (reduced lamin content), augment connections to the underlying heterochromatin (increased levels of LBR) and promote distortions imposed by the cytoskeleton (microtubule motors creating tension in the nuclear envelope)
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