Abnormal mitochondrial L-arginine transport contributes to the pathogenesis of heart failure and rexoygenation injury

Impaired mitochondrial function is fundamental feature of heart failure (HF) and myocardial ischemia. In addition to the effects of heightened oxidative stress, altered nitric oxide (NO) metabolism, generated by a mitochondrial NO synthase, has also been proposed to impact upon mitochondrial function. However, the mechanism responsible for arginine transport into mitochondria and the effect of HF on such a process is unknown. We therefore aimed to characterize mitochondrial L-arginine transport and to investigate the hypothesis that impaired mitochondrial L-arginine transport plays a key role in the pathogenesis of heart failure and myocardial injury.

The Indian public sphere in social media era

The media in a number of Western countries, including Australia, could be forgiven for envying the growth of the Indian media in recent decades. In contrast to more mature media markets in Australia and elsewhere, the Indian media is surviving the onslaught of new media technologies including social media platforms available to news audiences as an alternative to traditional news media. However, despite the omnipresence and diversity of over 800 television channels, over 94,000 publications and hundreds of radio stations, the ‘commercial’ imperative of Indian news media has raised doubts about their capacity to meet the ‘ideals’ of the public sphere. This paper examines the Indian public sphere in terms of citizens’ increasing use of various social media platforms to express their anger, frustration and protest against the system of governance and corruption. It analyses the use of social media platforms by mainstream media, socio-political organisations and audiences alike during recent events such as the Mumbai terror attack in 2008; the anti-corruption movement in 2011; protests against a lack of safety for women in 2012–13; and the federal elections in 2014; to understand the implications for the public sphere in India. The paper outlines interplay between the mainstream media’s coverage of some of these significant events, and the audience conversations pertaining to these news events on various social media platforms. It explores the increased utilisation of social media platforms by youth and the middle class, who have often remained disengaged with governance in the country, as a sign of deepening democracy and widening public sphere in India, despite the ‘digital divide’ that still exists in the country.

Using manipulated photographs to identify features of streetscapes that may encourage older adults to walk for transport

Experimental evidence of environmental features important for physical activity is challenging to procure in real world settings. The current study aimed to investigate the causal effects of environmental modifications on a photographed street's appeal for older adults' walking for transport. Secondly, we examined whether these effects differed according to gender, functional limitations, and current level of walking for transport. Thirdly, we examined whether different environmental modifications interacted with each other. Qualitative responses were also reported to gain deeper insight into the observed quantitative relationships. Two sets of 16 panoramic photographs of a streetscape were created, in which six environmental factors were manipulated (sidewalk evenness, traffic level, general upkeep, vegetation, separation from traffic, and benches). Sixty older adults sorted these photographs on appeal for walking for transport on a 7-point scale and reported qualitative information on the reasons for their rankings. Sidewalk evenness appeared to have the strongest influence on a street's appeal for transport-related walking. The effect of sidewalk evenness was even stronger when the street's overall upkeep was good and when traffic was absent. Absence of traffic, presence of vegetation, and separation from traffic also increased a street's appeal for walking for transport. There were no moderating effects by gender or functional limitations. The presence of benches increased the streetscape's appeal among participants who already walked for transport at least an hour/week. The protocols and methods used in the current study carry the potential to further our understanding of environment-PA relationships. Our findings indicated sidewalk evenness as the most important environmental factor influencing a street's appeal for walking for transport among older adults. However, future research in larger samples and in real-life settings is needed to confirm current findings.

Incidental physical activity in Melbourne, Australia: health and economic impacts of mode of transport and suburban location.

Using the known health impacts of physical activity (PA), levels of incidental PA in Melbourne were analysed, and after determining key behavioural associations, economic modelling estimated potential long-term health and economic benefits of changes in active transport (AT) patterns.

Neighbourhood environment, sitting time and motorised transport in older adults: a cross-sectional study in Hong Kong

OBJECTIVES: Sitting time is a public health concern. This study examined associations of objectively measured neighbourhood environmental attributes with non-transport sitting time and motorised transport in 484 Hong Kong older adults. Neighbourhood attributes encouraging walking may help older adults replace some sitting time at home and on motorised transport with light-to-moderate-intensity activities such as strolling around the neighbourhood or walking to/from neighbourhood destinations. Thus, we hypothesised environmental attributes found to be related to walking would show associations with non-transport sitting time and motorised transport opposite to those seen for walking. DESIGN: Cross-sectional. SETTING: Hong Kong, an ultradense urban environment. PARTICIPANTS: 484 ethnic Chinese Hong Kong residents aged 65+ recruited from membership lists of four Hong Kong Elderly Health Centres representing catchment areas of low and high transport-related walkability stratified by socioeconomic status (response rate: 78%). PRIMARY AND SECONDARY OUTCOME MEASURES: Attributes of participants' neighbourhood environments were assessed by environmental audits, while non-transport sitting time and motorised transport were ascertained using the International Physical Activity Questionnaire-Long Form (Chinese version). RESULTS: Daily non-transport sitting minutes were 283 (SD=128) and motorised transport 23 (SD=28). Prevalence of signs of crime/disorder, streetlights, public facilities (toilets and benches) and pedestrian safety were independently negatively related, and sloping streets positively related, to sitting outcomes. Places of worship in the neighbourhood were predictive of more, and prevalence of public transit points of less, non-transport sitting. Associations of either or both sitting outcomes with prevalence of food/grocery stores and presence of parks were moderated by path obstructions and signs of crime/disorder. CONCLUSIONS: The findings suggest that access to specific destinations and relatively low-cost, minimal impact modifications to the urban form, such as street lighting, public toilets, benches and public transit points, could potentially reduce sitting time and associated negative health outcomes in Hong Kong older adults.

Employer expectations of public relations graduates’ transmedia storytelling proficiency

The rapid evolution of information and communication technologies presents challenges for public relations educators as they seek to develop pedagogical approaches that balance theoretical concepts with a practical or ‘working’ knowledge of new media platforms. The incipient practice of transmedia storytelling in public relations contexts offers a timely example of this pedagogical flashpoint. In this study, the authors explored the incorporation of transmedia storytelling within current public relations practice and employer expectations of the transmedia storytelling proficiency of recent public relations graduates.The study took a qualitative approach with findings based on 15 semi-structured interviews with senior public relations professionals from four Australian states and five industry sectors. Findings suggest transmedia storytelling campaigns of varying complexity are a common characteristic of contemporary public relations practice, and that digitally literate graduates who can provide evidence of a solid theoretical knowledge and practical skills in relation to transmedia storytelling are highly sought after by the practitioners who took part in the study.

Treatment: six public artworks at the western treatment plant

This large scale curated Public Art project responds to the landscape, histories and technologies at Melbourne Water's Western Treatment Plant, Werribee. TREATMENT, with curator David Cross, associate curator Cameron Bishop, and six leading Australian artists - Bindi Cole Chocka, Megan Evans, Shane McGrath, Catherine Bell, Techa Noble and Spiros Panigirakis - have been supported to research the site and create artworks experienced by bus, across the plant. The artists have been commissioned to develop projects at a variety of sites. Sensory, technological, community and historical engagement are key aspects of this high profile project.

A systematic review of economic analyses of active transport interventions that include physical activity benefits

Physical inactivity is one of the leading causes for the growing prevalence of non-communicable diseases worldwide and there is a need for more evidence on the effectiveness and cost-effectiveness of interventions that aim to increase physical activity at the population level. This study aimed to update a systematic review published in 2008 by searching peer-reviewed and unpublished literature of economic evaluations of transport interventions that incorporate the health related effects of physical activity. Our analysis of methods for the inclusion of physical activity related health effects into transport appraisal over time demonstrates that methodological progress has been made. Thirty-six studies were included, reflecting an increasing recognition of the importance of incorporating these health effects into transport appraisal. However, significant methodological challenges in the incorporation of wider health benefits into transport appraisal still exist. The inclusion of physical activity related health effects is currently limited by paucity of evidence on morbidity effects and of more rigorous evidence on the effectiveness of interventions. Significant scope exists for better quality and more transparent reporting. A more consistent approach to the inclusion of benefits and disbenefits would reinforce the synergies between the health, environmental, transport and other sectors. From a transport sector perspective the inclusion of physical activity related health benefits positively impacts cost effectiveness, with the potential to contribute to a more efficient allocation of scarce resources based on a more comprehensive range of merits. From a public health perspective the inclusion of physical activity related health benefits may result in the funding of more interventions that promote active transport, with the potential to improve population levels of physical activity and to reduce prevalence of physical activity related diseases.

Celebrity screens/technologies of celebrity

Technology shapes the production of the public self. Celebrity has been positioned within the exigencies of different technological apparatuses - in film, television, online culture, and popular music - and is designed for very interesting but specific constructions of pleasure, performance and value. This essay situates the technological understructure of our celebrity culture and further situates the work in Part 5 of the book.

Perceived neighborhood environmental attributes sssociated with walking and cycling for transport among adult residents of 17 cities in 12 countries: the IPEN study

INTRODUCTION: Prevalence of walking and cycling for transport is low and varies greatly across countries. Few studies have examined neighborhood perceptions related to walking and cycling for transport in different countries. Therefore, it is challenging to prioritize appropriate built-environment interventions. OBJECTIVES: The aim of this study was to examine the strength and shape of the relationship between adults' neighborhood perceptions and walking and cycling for transport across diverse environments. METHODS: As part of the International Physical activity and Environment Network (IPEN) adult project, self-reported data were taken from 13,745 adults (18-65 years) living in physically and socially diverse neighborhoods in 17 cities across 12 countries. Neighborhood perceptions were measured using the Neighborhood Environment Walkability Scale, and walking and cycling for transport were measured using the International Physical Activity Questionnaire-Long Form. Generalized additive mixed models were used to model walking or cycling for transport during the last seven days with neighborhood perceptions. Interactions by city were explored. RESULTS: Walking-for-transport outcomes were significantly associated with perceived residential density, land use mix-access, street connectivity, aesthetics, and safety. Any cycling for transport was significantly related to perceived land use mix-access, street connectivity, infrastructure, aesthetics, safety, and perceived distance to destinations. Between-city differences existed for some attributes in relation to walking or cycling for transport. CONCLUSIONS: Many perceived environmental attributes supported both cycling and walking; however, highly walkable environments may not support cycling for transport. People appear to walk for transport despite safety concerns. These findings can guide the implementation of global health strategies.