Sport: A Leisure Business

This article explores the diversity of Sport and Business relationships and how they have changed to become more of an integral part of the leisure movement. It also examines the influences of sport as a cultural element in society

The Union Role in Fitness Program Management

A concern by management for the enriched lifestyle of its employees led to the development of industrial recreation programs during leisure hours. Evolving from this concept has been the relatively recent interest in employee fitness programs. Until recently, the question of labour viewing these programs as a potential negotiable benefit was never addressed. However, it is anticipated that this will change. Labour did not show an interest in this area before because fitness facilities were small, totally paid for by management and participants tended to be middle and upper, white-collar management levels. Labour interest has now increased due to expansion of fitness facilities and thus, many programs allow all employees to take part and even charge a slight fee. Program results reveal benefits to companies in absenteeism and productivity measures which are statistics well known to labour negotiation. Labour must now conduct research to ascertain such things as who should take part in a fitness program, who pays, company time for workouts, can personnel departments use test results for promotion, etc? They require this information because employee fitness programs should perhaps be a negotiated benefit

Visuo-spatial ability in colonoscopy simulator training

Visuo-spatial ability is associated with a quality of performance in a variety of surgical and medical skills. However, visuo-spatial ability is typically assessed using Visualization tests only, which led to an incomplete understanding of the involvement of visuo-spatial ability in these skills. To remedy this situation, the current study investigated the role of a broad range of visuo-spatial factors in colonoscopy simulator training. Fifteen medical trainees (no clinical experience in colonoscopy) participated in two psycho-metric test sessions to assess four visuo-spatial ability factors. Next, participants trained flexible endoscope manipulation, and navigation to the cecum on the GI Mentor II simulator, for four sessions within 1 week. Visualization, and to a lesser degree Spatial relations were the only visuo-spatial ability factors to correlate with colonoscopy simulator performance. Visualization additionally covaried with learning rate for time on task on both simulator tasks. High Visualization ability indicated faster exercise completion. Similar to other endoscopic procedures, performance in colonoscopy is positively associated with Visualization, a visuo-spatial ability factor characterized by the ability to mentally manipulate complex visuo-spatial stimuli. The complexity of the visuo-spatial mental transformations required to successfully perform colonoscopy is likely responsible for the challenging nature of this technique, and should inform training- and assessment design. Long term training studies, as well as studies investigating the nature of visuo-spatial complexity in this domain are needed to better understand the role of visuo-spatial ability in colonoscopy, and other endoscopic techniques

A New Set of Three-Dimensional Shapes for Investigating Mental Rotation Processes: Validation Data and Stimulus Set

Mental rotation is one of the most influential paradigms in the history of cognitive psychology. In this paper, we present a new set of validated mental rotation stimuli to be used freely by the scientific community. Three-dimensional visual rendering software was employed to generate a total of 384 realistic-looking mental rotation stimuli with shading and foreshortening depth cues. Each stimulus was composed of two pictures: a baseline object and a target object, placed side by side, which can be aligned by means of a rotation around the vertical axis in half of the stimuli but not in the other half. Behavioral data (N=54, freely available) based on these stimuli exhibited the typical linear increase in response times and error rates with angular disparity, validating the stimulus set. This set of stimuli is especially useful for studies where it is necessary to avoid stimulus repetition, such as training studies

Clusterin, a haploinsufficient tumor suppressor gene in neuroblastomas

This article is available open access through the publisher’s website. Copyright @ 2009 The Authors.Background - Clusterin expression in various types of human cancers may be higher or lower than in normal tissue, and clusterin may promote or inhibit apoptosis, cell motility, and inflammation. We investigated the role of clusterin in tumor development in mouse models of neuroblastoma. Methods - We assessed expression of microRNAs in the miR-17-92 cluster by real-time reverse transcription–polymerase chain reaction in MYCN-transfected SH-SY5Y and SH-EP cells and inhibited expression by transfection with microRNA antisense oligonucleotides. Tumor development was studied in mice (n = 66) that were heterozygous or homozygous for the MYCN transgene and/or for the clusterin gene; these mice were from a cross between MYCN-transgenic mice, which develop neuroblastoma, and clusterin-knockout mice. Tumor growth and metastasis were studied in immunodeficient mice that were injected with human neuroblastoma cells that had enhanced (by clusterin transfection, four mice per group) or reduced (by clusterin short hairpin RNA [shRNA] transfection, eight mice per group) clusterin expression. All statistical tests were two-sided. Results - Clusterin expression increased when expression of MYCN-induced miR-17-92 microRNA cluster in SH-SY5Y neuroblastoma cells was inhibited by transfection with antisense oligonucleotides compared with scrambled oligonucleotides. Statistically significantly more neuroblastoma-bearing MYCN-transgenic mice were found in groups with zero or one clusterin allele than in those with two clusterin alleles (eg, 12 tumor-bearing mice in the zero-allele group vs three in the two-allele group, n = 22 mice per group; relative risk for neuroblastoma development = 4.85, 95% confidence interval [CI] = 1.69 to 14.00; P = .005). Five weeks after injection, fewer clusterin-overexpressing LA-N-5 human neuroblastoma cells than control cells were found in mouse liver or bone marrow, but statistically significantly more clusterin shRNA-transfected HTLA230 cells (3.27%, with decreased clusterin expression) than control-transfected cells (1.53%) were found in the bone marrow (difference = 1.74%, 95% CI = 0.24% to 3.24%, P = .026). Conclusions - We report, to our knowledge, the first genetic evidence that clusterin is a tumor and metastasis suppressor gene.Sport Aiding Medical Research for Kids (SPARKS), Great Ormond Street Hospital/National Health Service, the National Cancer Institute and University of Parma

The impact of breast reconstruction on the delivery of chemotherapy

BACKGROUND: The purpose of this study was to evaluate the impact of postmastectomy breast reconstruction on the timing of chemotherapy. METHODS: The authors included stage I-III breast cancer patients from 8 National Comprehensive Cancer Network institutions for whom guidelines recommended chemotherapy. Surgery type was categorized as breast-conserving surgery (BCS), mastectomy alone, mastectomy with immediate reconstruction (M + IR), or mastectomy with delayed reconstruction (M + DR). A Cox regression analysis was used to assess the association between surgery type and timing of chemotherapy initiation. RESULTS: Of the 3643 patients, only 5.1% received it ≥8 weeks from surgery. In the multivariate analysis, higher stage, Caucasian and Hispanic race/ethnicity, lower body mass index, and absence of comorbid conditions were all significantly associated with earlier time to chemotherapy. There was also significant interaction among age, surgery, and chemotherapy delivery. Among women <60, time to chemotherapy was shorter for all surgery types compared with M + IR (statistical significant for all surgery types in the youngest age group and for BCS in women 40 to <50 years old). In contrast, among women ≥60, time to chemotherapy was shorter among women receiving M + IR or M + DR compared with those undergoing BCS or mastectomy alone, a difference that was statistically significant for the M + IR versus BCS comparison. CONCLUSIONS: Immediate postmastectomy breast reconstruction does not appear to lead to omission of chemotherapy, but it is associated with a modest, but statistically significant, delay in initiating treatment. For most, it is unlikely that this delay has any clinical significance. Cancer 2010. © 2010 American Cancer Society.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/69182/1/24891_ftp.pd

The Arf tumor suppressor protein inhibits Miz1 to suppress cell adhesion and induce apoptosis

Arf assembles a complex containing Miz1, heterochromatin, and histone H3K3 to block expression of genes involved in cell adhesion and signal transduction. The resulting blockade of cell–cell and cell–matrix interactions facilitates elimination of cells carrying oncogenic mutations

TELMA: Technology enhanced learning environment for minimally invasive surgery

Background: Cognitive skills training for minimally invasive surgery has traditionally relied upon diverse tools, such as seminars or lectures. Web technologies for e-learning have been adopted to provide ubiquitous training and serve as structured repositories for the vast amount of laparoscopic video sources available. However, these technologies fail to offer such features as formative and summative evaluation, guided learning, or collaborative interaction between users. Methodology: The "TELMA" environment is presented as a new technology-enhanced learning platform that increases the user's experience using a four-pillared architecture: (1) an authoring tool for the creation of didactic contents; (2) a learning content and knowledge management system that incorporates a modular and scalable system to capture, catalogue, search, and retrieve multimedia content; (3) an evaluation module that provides learning feedback to users; and (4) a professional network for collaborative learning between users. Face validation of the environment and the authoring tool are presented. Results: Face validation of TELMA reveals the positive perception of surgeons regarding the implementation of TELMA and their willingness to use it as a cognitive skills training tool. Preliminary validation data also reflect the importance of providing an easy-to-use, functional authoring tool to create didactic content. Conclusion: The TELMA environment is currently installed and used at the Jesús Usón Minimally Invasive Surgery Centre and several other Spanish hospitals. Face validation results ascertain the acceptance and usefulness of this new minimally invasive surgery training environment

A c-Myc–SIRT1 feedback loop regulates cell growth and transformation

The protein deacetylase SIRT1 has been implicated in a variety of cellular functions, including development, cellular stress responses, and metabolism. Increasing evidence suggests that similar to its counterpart, Sir2, in yeast, Caenorhabditis elegans, and Drosophila melanogaster, SIRT1 may function to regulate life span in mammals. However, SIRT1's role in cancer is unclear. During our investigation of SIRT1, we found that c-Myc binds to the SIRT1 promoter and induces SIRT1 expression. However, SIRT1 interacts with and deacetylates c-Myc, resulting in decreased c-Myc stability. As a consequence, c-Myc's transformational capability is compromised in the presence of SIRT1. Overall, our experiments identify a c-Myc–SIRT1 feedback loop in the regulation of c-Myc activity and cellular transformation, supporting/suggesting a role of SIRT1 in tumor suppression