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result(s) for
"David Ross Brennan"
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Understanding marketing innovativeness in Asia: a research agenda
2017
Marketing innovativeness has been credited for improvements in general quality of life, consumer experience, and firms’ and brands’ performance. However, much of the knowledge and research on marketing innovativeness has developed from studies in Western countries, particularly the USA and Europe, with little understanding of marketing innovativeness in Asia. In this paper, we critically examine existing literature with aim of developing a better understanding of marketing innovativeness in Asia. We discuss theoretical and methodological considerations of which researchers need to be aware when they pursue research on Asian countries.
Journal Article
Social marketing and healthy eating: findings from young people in Greece
by
Caraher, Martin
,
Brennan, David Ross
,
Kapetanaki, Ariadne Beatrice
in
Business and Management
,
Diet
,
Eating behavior
2014
Greece has high rates of obesity and non-communicable diseases owing to poor dietary choices. This research provides lessons for social marketing to tackle the severe nutrition-related problems in this country by obtaining insight into the eating behaviour of young adults aged 18–23. Also, the main behavioural theories used to inform the research are critically discussed. The research was conducted in Athens. Nine focus groups with young adults from eight educational institutions were conducted and fifty-nine participants’ views towards eating habits, healthy eating and the factors that affect their food choices were explored. The study found that the participants adopted unhealthier nutritional habits after enrolment. Motivations for healthy eating were good health, appearance and psychological consequences, while barriers included lack of time, fast-food availability and taste, peer pressure, lack of knowledge and lack of family support. Participants reported lack of supportive environments when deciding on food choices. Based on the findings, recommendations about the development of the basic 4Ps of the marketing mix, as well as of a fifth P, for Policy are proposed.
Journal Article
Reduced Mature MicroRNA Levels in Association with Dicer Loss in Human Temporal Lobe Epilepsy with Hippocampal Sclerosis
2012
Hippocampal sclerosis (HS) is a common pathological finding in patients with temporal lobe epilepsy (TLE) and is associated with altered expression of genes controlling neuronal excitability, glial function, neuroinflammation and cell death. MicroRNAs (miRNAs), a class of small non-coding RNAs, function as post-transcriptional regulators of gene expression and are critical for normal brain development and function. Production of mature miRNAs requires Dicer, an RNAase III, loss of which has been shown to cause neuronal and glial dysfunction, seizures, and neurodegeneration. Here we investigated miRNA biogenesis in hippocampal and neocortical resection specimens from pharmacoresistant TLE patients and autopsy controls. Western blot analysis revealed protein levels of Dicer were significantly lower in certain TLE patients with HS. Dicer levels were also reduced in the hippocampus of mice subject to experimentally-induced epilepsy. To determine if Dicer loss was associated with altered miRNA processing, we profiled levels of 380 mature miRNAs in control and TLE-HS samples. Expression of nearly 200 miRNAs was detected in control human hippocampus. In TLE-HS samples there was a large-scale reduction of miRNA expression, with 51% expressed at lower levels and a further 24% not detectable. Primary transcript (pri-miRNAs) expression levels for several tested miRNAs were not different between control and TLE-HS samples. These findings suggest loss of Dicer and failure of mature miRNA expression may be a feature of the pathophysiology of HS in patients with TLE.
Journal Article
Transgenic Overexpression of 14-3-3 Zeta Protects Hippocampus against Endoplasmic Reticulum Stress and Status Epilepticus In Vivo
by
Jimenez-Mateos, Eva M.
,
Engel, Tobias
,
Tzivion, Guri
in
14-3-3 protein
,
14-3-3 Proteins - genetics
,
Animals
2013
14-3-3 proteins are ubiquitous molecular chaperones that are abundantly expressed in the brain where they regulate cell functions including metabolism, the cell cycle and apoptosis. Brain levels of several 14-3-3 isoforms are altered in diseases of the nervous system, including epilepsy. The 14-3-3 zeta (ζ) isoform has been linked to endoplasmic reticulum (ER) function in neurons, with reduced levels provoking ER stress and increasing vulnerability to excitotoxic injury. Here we report that transgenic overexpression of 14-3-3ζ in mice results in selective changes to the unfolded protein response pathway in the hippocampus, including down-regulation of glucose-regulated proteins 78 and 94, activating transcription factors 4 and 6, and Xbp1 splicing. No differences were found between wild-type mice and transgenic mice for levels of other 14-3-3 isoforms or various other 14-3-3 binding proteins. 14-3-3ζ overexpressing mice were potently protected against cell death caused by intracerebroventricular injection of the ER stressor tunicamycin. 14-3-3ζ overexpressing mice were also potently protected against neuronal death caused by prolonged seizures. These studies demonstrate that increased 14-3-3ζ levels protect against ER stress and seizure-damage despite down-regulation of the unfolded protein response. Delivery of 14-3-3ζ may protect against pathologic changes resulting from prolonged or repeated seizures or where injuries provoke ER stress.
Journal Article
The promise and peril of chemical probes
2015
Chemical probes are powerful reagents with increasing impacts on biomedical research. However, probes of poor quality or that are used incorrectly generate misleading results. To help address these shortcomings, we will create a community-driven wiki resource to improve quality and convey current best practice.
Journal Article
Phase 3 Study of Recombinant Factor IX Fc Fusion Protein in Hemophilia B
2013
A fusion protein comprising factor IX and the dimeric Fc domain of IgG1 has a half-life that is five times as long as that of native factor IX, allowing prophylactic injections to be spaced as far as 2 weeks apart while maintaining levels of factor IX that are sufficient to prevent bleeding.
In patients with severe hemophilia B, recurrent bleeding leads to painful hemarthroses, disabling hemophilic arthropathy, and other sequelae.
1
,
2
Prophylactic replacement of coagulation factor IX is associated with improved clinical outcomes
3
–
7
; however, the relatively short half-lives of currently available factor IX products necessitate frequent intravenous injections (two or three times weekly) to maintain protective levels (at or above 1 IU per deciliter).
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,
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The frequency of injections is a considerable burden, cited by patients as a key deterrent to undertaking prophylactic treatment.
10
Various strategies to reduce this burden and improve the treatment of hemophilia B are under investigation, . . .
Journal Article
Men's Sexual Orientation and Health in Canada
2010
Objectives: Previous large-scale population studies have reported that gay and bisexual men may be at increased risk for health disparities. This study was conducted to determine whether health status and health risk behaviours of Canadian men vary based on sexual orientation identity. Methods: Utilizing the Canadian Community Health Survey data (Cycle 2.1, 2003; n=49,901), we conducted multivariable logistic regression to assess the independent effects of sexual orientation on health status and health risk behaviours. For all multivariate models, we calculated odds ratios, p-values, standard errors, and 95% confidence intervals (CIs) using the bootstrap re-sampling procedure recommended by Statistics Canada. Results: When compared to heterosexual men, gay and bisexual men did not report more respiratory conditions; had lower rates of obesity and overweight BMI; and reported more mood/anxiety disorders, and a history of lifetime suicidality. Gay and bisexual men did not report higher rates of daily smoking or risky drinking, however, gay men reported an almost six-fold increase in STD diagnoses when compared to heterosexual men. Conclusion: This study represents the largest-known population-based data analysis on health risks and behaviours among men of varying sexual orientations. These findings raise important concerns regarding the impact of sexual orientation on mental and sexual health. Limitations of this data set, including those associated with measurement of sexual orientation, are discussed. Further research is required to understand the mechanisms that influence these health resiliencies and disparities. Objectifs : Selon des études démographiques à grande échelle menées antérieurement, les hommes homosexuels et bisexuels pourraient courir un risque accru d'afficher des disparités dans leur état de santé. Nous avons voulu déterminer si l'état de santé des Canadiens de sexe masculin et leurs comportements présentant un risque pour la santé varient selon leur orientation sexuelle. Méthode : À l'aide des données de l'Enquête sur la santé dans les collectivités canadiennes (Cycle 2.1, 2003; n=49 901), nous avons effectué une analyse de régression logistique multivariée pour déterminer les effets indépendants de l'orientation sexuelle sur l'état de santé et sur les comportements qui présentent un risque pour la santé. Dans tous nos modèles multivariés, nous avons calculé les rapports de cotes, les valeurs P, les erreurs-types et les intervalles de confiance (IC) de 95 % par la méthode de rééchantillonnage bootstrap recommandée par Statistique Canada. Résultats : Comparativement aux hommes hétérosexuels, les hommes homosexuels et bisexuels ne déclaraient pas plus de troubles respiratoires; leurs taux d'obésité et d'IMC en surpoids étaient plus faibles; mais ils déclaraient davantage de troubles de l'humeur et de troubles anxieux, et des antécédents de suicidabilité sur la vie entière. Les hommes homosexuels et bisexuels ne déclaraient pas de taux de tabagisme quotidien ni d'abus d'alcool plus élevés; cependant, les homosexuels faisaient état de diagnostics de MTS presque six fois plus élevés que les hétérosexuels. Conclusion : Cette étude est la plus vaste analyse connue de données représentatives sur les risques pour la santé et les comportements d'hommes de diverses orientations sexuelles. Nos constatations soulèvent des préoccupations importantes quant à l'incidence de l'orientation sexuelle sur la santé mentale et sexuelle. Nous expliquons les contraintes de ce jeu de données, dont celles associées à la mesure de l'orientation sexuelle. Il faudrait pousser la recherche pour comprendre les mécanismes qui influencent la resilience et les disparités sur le plan de la santé que nous avons mises en évidence.
Journal Article
Occupational socioeconomic risk associations for head and neck cancer in Europe and South America: individual participant data analysis of pooled case–control studies within the INHANCE Consortium
by
Conway, David I
,
Kjaerheim, Kristina
,
Menvielle, Gwenn
in
Alcohol
,
cancer epidemiology
,
cancer: occupational
2021
BackgroundThe association between socioeconomic disadvantage (low education and/or income) and head and neck cancer is well established, with smoking and alcohol consumption explaining up to three-quarters of the risk. We aimed to investigate the nature of and explanations for head and neck cancer risk associated with occupational socioeconomic prestige (a perceptual measure of psychosocial status), occupational socioeconomic position and manual-work experience, and to assess the potential explanatory role of occupational exposures.MethodsPooled analysis included 5818 patients with head and neck cancer (and 7326 control participants) from five studies in Europe and South America. Lifetime job histories were coded to: (1) occupational social prestige—Treiman’s Standard International Occupational Prestige Scale (SIOPS); (2) occupational socioeconomic position—International Socio-Economic Index (ISEI); and (3) manual/non-manual jobs.ResultsFor the longest held job, adjusting for smoking, alcohol and nature of occupation, increased head and neck cancer risk estimates were observed for low SIOPS OR=1.88 (95% CI: 1.64 to 2.17), low ISEI OR=1.74 (95% CI: 1.51 to 1.99) and manual occupations OR=1.49 (95% CI: 1.35 to 1.64). Following mutual adjustment by socioeconomic exposures, risk associated with low SIOPS remained OR=1.59 (95% CI: 1.30 to 1.94).ConclusionsThese findings indicate that low occupational socioeconomic prestige, position and manual work are associated with head and neck cancer, and such risks are only partly explained by smoking, alcohol and occupational exposures. Perceptual occupational psychosocial status (SIOPS) appears to be the strongest socioeconomic factor, relative to socioeconomic position and manual/non-manual work.
Journal Article
Risk factors for eating disorders: findings from a rapid review
by
Marks, Peta
,
Touyz, Stephen
,
Bryant, Emma
in
Aetiology, review
,
Behavioral Science and Psychology
,
Clinical Psychology
2023
Background
Risk factors represent a range of complex variables associated with the onset, development, and course of eating disorders. Understanding these risk factors is vital for the refinement of aetiological models, which may inform the development of targeted, evidence-based prevention, early intervention, and treatment programs. This Rapid Review aimed to identify and summarise research studies conducted within the last 12 years, focusing on risk factors associated with eating disorders.
Methods
The current review forms part of a series of Rapid Reviews to be published in a special issue in the Journal of Eating Disorders, funded by the Australian Government to inform the development of the National Eating Disorder Research and Translation Strategy 2021–2031. Three databases were searched for studies published between 2009 and 2021, published in English, and comprising high-level evidence studies (meta-analyses, systematic reviews, moderately sized randomised controlled studies, moderately sized controlled-cohort studies, or population studies). Data pertaining to risk factors for eating disorders were synthesised and outlined in the current paper.
Results
A total of 284 studies were included. The findings were divided into nine main categories: (1) genetics, (2) gastrointestinal microbiota and autoimmune reactions, (3) childhood and early adolescent exposures, (4) personality traits and comorbid mental health conditions, (5) gender, (6) socio-economic status, (7) ethnic minority, (8) body image and social influence, and (9) elite sports. A substantial amount of research exists supporting the role of inherited genetic risk in the development of eating disorders, with biological risk factors, such as the role of gut microbiota in dysregulation of appetite, an area of emerging evidence. Abuse, trauma and childhood obesity are strongly linked to eating disorders, however less conclusive evidence exists regarding developmental factors such as role of in-utero exposure to hormones. Comorbidities between eating disorders and mental health disorders, including personality and mood disorders, have been found to increase the severity of eating disorder symptomatology. Higher education attainment, body image-related factors, and use of appearance-focused social media are also associated with increased risk of eating disorder symptoms.
Conclusion
Eating disorders are associated with multiple risk factors. An extensive amount of research has been conducted in the field; however, further studies are required to assess the causal nature of the risk factors identified in the current review. This will assist in understanding the sequelae of eating disorder development and in turn allow for enhancement of existing interventions and ultimately improved outcomes for individuals.
Plain English summary
Research into the risk factors associated with eating disorders (EDs) is necessary in order to better understand the reasons why people develop EDs and to inform programs which aim to reduce these risk factors. In the current study we reviewed studies published between 2009 and 2021 which had researched risk factors associated with EDs. This study is one review of a wider Rapid Review series conducted as part the development of Australia’s National Eating Disorders Research and Translation Strategy 2021–2031. The findings from this review are grouped into nine main risk factor categories. These include (1) genetics, (2) gastrointestinal microbiota and autoimmune reactions, (3) childhood and early adolescent exposures, (4) personality traits and comorbid mental health conditions, (5) gender, (6) socio-economic status, (7) ethnic minority, (8) body image and social influence, and (9) elite sports. Further research is needed to better understand the relationship between the risk factors, in particular the ways in which they may interact with each other and whether they cause the ED or are just associated with the ED.
Journal Article