Gow’s Typology of Scotland’s Islands : Technical notes

Publisher PD

Attitudes towards the use and acceptance of eHealth technologies : a case study of older adults living with chronic pain and implications for rural healthcare

Acknowledgements The research described here is supported by the award made by the RCUK Digital Economy programme to the dot.rural Digital Economy Hub; award reference: EP/G066051/1. MC’s time writing the paper is funded by the Scottish Government’s Rural and Environmental Science and Analytical Services Division (RESAS) under Theme 8 ‘Vibrant Rural Communities’ of the Food, Land and People Programme (2011–2016). MC is also an Honorary Research Fellow at the Division of Applied Health Sciences, University of Aberdeen. The input of other members of the TOPS research team, Alastair Mort, Fiona Williams, Sophie Corbett, Phil Wilson and Paul MacNamee who contributed to be wider study and discussed preliminary findings reported here with the authors of the paper is acknowledged. We acknowledge the feedback on earlier versions of this paper provided by members of the Trans-Atlantic Rural Research Network, especially Stefanie Doebler and Carmen Hubbard. We also thank Deb Roberts for her comments.Peer reviewedPublisher PD

Tumour growth in mice resistant to diet-induced obesity

Obesity is a chronic disease with associated increases in the incidence, and a reduction in survival, of many cancer types. Obesity results from an imbalance in calorie intake and calorie requirement. This study aimed to investigate the separate effects of high-fat diet and obesity on cancer in an animal model resistant to diet-induced obesity. Male BALB/c mice fed long-term on a high-fat, Western-style diet were implanted with syngeneic CT26 colon adenocarcinoma cells and compared to mice fed normal diet. BALB/c mice on high-fat diet were 10% heavier than mice fed normal diet, with no difference in tumour growth rates or tumour cell proliferation. Subgroups of mice that became obese on high-fat diet, however, showed increased tumour growth rates compared to mice fed normal diet, whereas mice that remained slim showed no difference in tumour growth. Protein arrays identified several adipokines that were expressed at different levels, including serum Tissue Inhibitors of Metallo-Proteinases (TIMP-1) and tumour C-Reactive Protein (CRP). In conclusion, tumour growth was enhanced in mice unable to resist obesity, and adipokine profiles were affected by the animals’ ability to resist obesity

Assessment of adult rat cardiac fibroblast viability following chronic sunitinib treatment

The tyrosine kinase inhibitor sunitinib has dramatically improved cancer therapy in recent years however, this success has been marred by reports of associated cardiotoxicity. The effect of sunitinib on cardiac myocyte function has been extensively studied, yet little is known of wider ranging effects on cardiac non-myocytes. Cardiac fibroblasts (CF) are the most abundant cell type within the heart and are responsible for maintaining cardiac structure via extracellular matrix remodelling and for facilitating synchronised cardiac contraction. Here, we have investigated whether chronic sunitinib treatment adversely affects CF viability

In vivo and in vitro toxicity of cobalt in the heart

Wear debris from cobalt/chromium (Co/Cr) alloy metal-on-metal bearings in prosthetic hip replacements has created a significant internal source of cobalt exposure in these patients. Co toxicity is suspected to contribute to severe systemic adverse effects, including cardiac and CNS effects, in patients with high circulating Co concentrations. This study investigated the effects of chronic Co exposure to rats (1mg/kg i.p. CoCl2, daily, for 28 days) and Co uptake into primary adult rat cardiac fibroblasts (CFs). Co treatment was associated with accumulation into various organs of the body and significant increases in Co levels were detected in liver, kidney and heart. Echocardiography showed functional changes that correlated with compromised cardiac contractility. Fractional shortening was significantly reduced in CoCl2-treated rats following 28 days treatment compared to the control group (54.01±0.90% and 60.29±0.53% respectively), providing evidence of contractile dysfunction. Cellular studies examined uptake of CoCl2 into both CFs and 3T3 fibroblasts using inductively coupled plasma mass spectrometry (ICP-MS) to measure intracellular metal content. The range of Co uptake increased proportionally (0-50 µg/L) for the 3T3 cells, as well as for the CFs (about 0-120 µg/L) when the CoCl2 concentration in the medium was increased between 0 and 72 mg/L. Uptake of Co into CFs was significantly greater than into 3T3 cells. The greater accumulation of CoCl2 into CFs suggests Co ions in vivo could accumulate in these cells, leading to functional consequences on cardiac performance. Future work will focus on determining the underlying uptake mechanism which could have important therapeutic implications

Cobalt administration causes reduced contractility with parallel increases in TRPC6 and TRPM7 transporter protein expression in adult rat hearts

Exposure to circulating cobalt (Co2+) in patients with metal-on-metal orthopaedic hip implants has been linked to cardiotoxicity but the underlying mechanism(s) remain undefined. The aim of the current study was to examine the effects of Co2+ on the heart in vivo and specifically on cardiac fibroblasts in vitro. Adult male rats were treated with CoCl2 (1 mg/kg) for either 7 days or 28 days. Inductively coupled plasma mass spectrometry (ICP-MS) was used to measure Co2+uptake into various organs of the body. Co2+ accumulated in the heart over time with significant levels evident after only 7 days of treatment. There was no evidence of cardiac remodelling following Co2+ treatment as assessed by heart weight:body weight and left ventricular weight:body weight. However, a decrease in fractional shortening, as measured using echocardiography, was observed after 28 days of Co2+ treatment. This was accompanied by increased protein expression of the ion transient receptor potential (TRP) channels TRPC6 and TRPM7 as assessed by quantitative immunoblotting of whole cardiac homogenates. Uptake of Co2+ specifically into rat cardiac fibroblasts was measured over 72 h and was shown to dramatically increase with increasing concentrations of applied CoCl2. Expression levels of TRPC6 and TRPM7 proteins were both significantly elevated in these cells following Co2+treatment. In conclusion, Co2+ rapidly accumulates to significant levels in the heart causing compromised contractility in the absence of any overt cardiac remodelling. TRPC6 and TRPM7 expression levels are significantly altered in the heart following Co2+ treatment and this may contribute to the Co2+-induced cardiotoxicity observed over time

Blood Vitamin C Levels of Patients Receiving Immunotherapy and Relationship to Monocyte Subtype and Epigenetic Modification

The treatment of metastatic melanoma has been revolutionised by immunotherapy, yet a significant number of patients do not respond, and many experience autoimmune adverse events. Associations have been reported between patient outcome and monocyte subsets, whereas vitamin C (ascorbate) has been shown to mediate changes in cancer-stimulated monocytes in vitro. We therefore investigated the relationship of ascorbate with monocyte subsets and epigenetic modifications in patients with metastatic melanoma receiving immunotherapy. Patients receiving immunotherapy were compared to other cancer cohorts and age-matched healthy controls. Ascorbate levels in plasma and peripheral blood-derived mononuclear cells (PBMCs), monocyte subtype and epigenetic markers were measured, and adverse events, tumour response and survival were recorded. A quarter of the immunotherapy cohort had hypovitaminosis C, with plasma and PBMC ascorbate levels significantly lower than those from other cancer patients or healthy controls. PBMCs from the immunotherapy cohort contained similar frequencies of non-classical and classical monocytes. DNA methylation markers and intracellular ascorbate concentration were correlated with monocyte subset frequency in healthy controls, but correlation was lost in immunotherapy patients. No associations between ascorbate status and immune-related adverse events or tumour response or overall survival were apparent.</p

Digital literacies and children’s personalized books: Locating the 'self'

This conceptual article discusses the role of digital literacies in personalized books, in relation to children’s developing sense of self, and in terms of assessing the potential impact of artificial intelligence (AI). Personalized books contain children’s data, such as their name, gender or image, and they can be created by readers or automatically by the publisher. Some personalized books are e-books enhanced with artificial intelligence, and some can be ordered as paperbacks. We discuss this use of children’s personal data in terms of the social location of the self with regard to subjective and objective dimensions. We draw on a map metaphor, in which objective space requires readers to locate themselves in an unknown ‘A-to-B’ space and subjective space provides an individually oriented world of ‘me-to-B’. By drawing on examples of personalized books and their use by parents and young children, we discuss how personalization troubles the borders between readers’ me-to-B and A-to-B space experiences, leading to possible confusion in the sense of self. We conclude by noting that AI-enhanced personalized texts can reduce personal agency with respect to formulating a sense of identity as a child

The dopamine D2 receptor gene and depressive and anxious symptoms in childhood: Associations and evidence for gene-environment correlation and gene-environment interaction

ObjectiveS: Research implicates the A1 allele of the dopamine D2 receptor gene (DRD2) Taq1A polymorphism in the development of depression and anxiety. Furthermore, recent papers suggest that children with A1 allele of this gene may receive less positive parenting, and that the effects of this gene on child symptoms may be moderated by parenting. We sought to replicate and extend these findings using behavioral measures in a nonclinical sample of young children. Methods: In a sample of 473 preschool-aged children and their mothers, structured clinical interview measures and maternal reports of child symptoms were collected, and standardized observations of parent-child interactions were conducted. Results: An association was detected between the DRD2 A1 allele and symptoms of depression and anxiety indexed using interview and parent report methods. As found in previous reports, children with the DRD2 A1 allele received less supportive parenting and displayed higher levels of negative emotionality during parent-child interactions. Tests of mediation and moderation were conducted. Conclusion: We found associations between the DRD2 A1 allele and early-emerging anxious and depressive symptoms in a community sample of preschool-aged children, and evidence of a gene-environment correlation and moderation of the main effect of child genotype on child symptoms by parenting. © 2010 Wolters Kluwer Health | Lippincott Williams & Wilkins

Barriers experienced by families new to Alberta, Canada when accessing routine-childhood vaccinations

Abstract Background As Canada and other high-income countries continue to welcome newcomers, we aimed to 1) understand newcomer parents’ attitudes towards routine-childhood vaccinations (RCVs), and 2) identify barriers newcomer parents face when accessing RCVs in Alberta, Canada. Methods Between July 6th—August 31st, 2022, we recruited participants from Alberta, Canada to participate in moderated focus group discussions. Inclusion criteria included parents who had lived in Canada for < 5 years with children < 18 years old. Focus groups were transcribed verbatim and analyzed using content and deductive thematic analysis. The capability opportunity motivation behaviour model was used as our conceptual framework. Results Four virtual and three in-person focus groups were conducted with 47 participants. Overall, parents were motivated and willing to vaccinate their children but experienced several barriers related to their capability and opportunity to access RCVs. Five main themes emerged: 1) lack of reputable information about RCVs, 2) language barriers when looking for information and asking questions about RCVs, 3) lack of access to a primary care provider (PCP), 4) lack of affordable and convenient transportation options, and 5) due to the COVID-19 pandemic, lack of available vaccine appointments. Several minor themes were also identified and included barriers such as lack of 1) childcare, vaccine record sharing, PCP follow-up. Conclusions Our findings highlight that several barriers faced by newcomer families ultimately stem from issues related to accessing information about RCVs and the challenges families face once at vaccination clinics, highlighting opportunities for health systems to better support newcomers in accessing RCVs